World Dental Implants and Orthodontics Congress August 17-18, 2018 Tokyo, Japan

Biography:

Soonshin Hwang completed her dental education at Creighton University School of Dentistry. She has completed the AEGD (Advanced Education in General Dentistry) program at Columbia University and orthodontic specialty training at Yonsei University Gangnam Severance Dental Hospital. She currently works at the Orthodontic Department of Gangnam Severance Dental Hospital as a clinical assistant professor.

Abstract:

Transverse discrepancy is generally diagnosed upon intraoral examination by the presence of a posterior crossbite. The etiology of this malocclusion is multifactorial and is associated with hereditary or environmental factors such as skeletal, dental or congenital abnormalities, nonnutritive sucking habits, mouth breathing, etc. Posterior crossbites remaining into adulthood could pose a risk for continuous periodontal damage, unstable occlusion and even facial asymmetry. 

It is not uncommon to encounter individuals with increased vertical dimensions with relatively narrower upper dental arch and posterior teeth either compensated or in a crossbite state. In addition, Class II and III patients frequently show transverse dental discrepancies which further complicate orthodontic treatment. However, most of these clinical findings have been studied by posteroanterior radiographs which may inevitably include magnification errors because of its 2 dimensional nature.

            This presentation will show evaluations of dental arch dimensions and tooth inclinations of the molar area using 3 dimensional CBCT images in adults with different vertical and sagittal facial types. Vertical dimensions will be categorized as high, normal, low angle based on the mandibular plane angle and subjects with different sagittal dimensions will be grouped into Class I, II and III using the ANB angle. Appropriate patient cases that show orthodontic treatment in overcoming such transverse discrepancies will be presented to help correlate the findings of this study for clinical application. 

Biography:

Tuong Nguyen Nguyen has earned his Bachelor’s degree in Dental Sciences in 1997 from the Catholic University of Louvain in Brussels, Belgium. He subsequently earned his Certificate in Clinical Endodontics and Master of Science in Dentistry degree in 2001 from Case Western Reserve University in Cleveland, OH. He was a full-time Assistant Professor in the Department of Endodontics at the University of Maryland from 2001 to 2004 and at the Oregon Health and Science University from 2004 to 2008. He is the Founder of Polaris Dental Specialists and the Love All Foundation. He currently practices at Polaris Dental Specialists, a multi-specialty practice in Beaverton and Salem, OR, USA. He is a Master at the World Clinical Laser Institute and Adjunct Professor of Endodontics at Case Western Reserve University.

Abstract:

An expert is defined as a person who has a special skillset or knowledge in some particular field; somebody who is a specialist or an authority in that field. In addition, someone is only an expert if he or she can deliver on their special skills. Having special training or holding a specific status does not necessarily make someone an expert. It's all about results! A true expert should always consider all the following: training, knowledge, practice and experience and finally equipment. Also, one must never forget that it takes more than just the doctor to be the expert. In this presentation, Dr. Nguyen will methodically discuss what it would take for ANYONE who is self-motivated to become a “Comm-Endo” ... without being an endodontist. Clinical cases and videos will be used to discuss what general dentists and endodontists alike should be able to master in order to EXPERTLY serve their patients.

Upon completion of the session, attendees shall be able to

1. Understand what makes one an expert without being an Endodontist
2. Discern which equipment to include in their armamentarium and which not to invest in
3. Understand how to incorporate their Team in providing expert care
4. Integrate foundational concepts of how to increase fees while INCREASING patients flow
5. Learn effective marketing strategies to stand out locally and on the web, as an expert in Endodontics

Biography:

Ahmed Alshabab has obtained his bachelor’s degree in Dental Surgery from King Khalid University, Saudi Arabia and Master of Science in Oral Biology from the University of Pennsylvania. The USA. He is the Fellow and Diplomates in Royal College of Dentists of Canada and American Board of Periodontology, respectively. He holds a Vice Dean position for development and quality, Faculty of Dentistry in Najran University, Saudi Arabia. He is an Assistant Professor of Periodontics and Dental Implants, Faculty of Dentistry, Najran University, Saudi Arabia.

Abstract:

When a tooth extracted, the alveolar bone around it will tend to resorb. The reduction in alveolar ridge width and height after tooth extraction is evident in the literature. Dental implants can be used to replace teeth after extraction. However, in some situations the bone resorption reaches to point where replacement with dental implants becomes impossible. Ridge deficiency could be in bone height or width or in more advanced cases associated with soft tissue deficiency. Conditions where alveolar bone/soft tissue is reduced may result in biological/functional and or esthetic failures. A procedure known as Ridge Preservation may limit such reduction of alveolar bone following teeth extraction. The purpose of the ridge preservation procedure is to keep the width and height of the extraction socket. Many techniques, bone graft, membranes and biologics has been introduced in this filed. The aim of the paper is to review several techniques and materials used for ridge preservation and suggest flowchart for decision making in ridge preservation procedure.

Biography:

Abstract:

INTRODUCTION

Porcelain fused to metal crown is the most versatile variety of crown that is commonly placed worldwide. The objective of the present study was to determine the frequency of these complications and survival of crowns cemented over a period of five years in a tertiary care hospital and also to report the survival of these crowns.

MATERIAL & METHOD

A retrospective audit study was conducted in Dental clinics, Aga Khan University Hospital in which 150 PFM crowns were evaluated. All PFM crowns fulfilling the inclusion criteria were assessed both clinically and radiographically. Data was recorded in a specially designed proforma. SPSS version 22.0 was used for statistical analysis. Frequency distribution of complications was determined. Chi-square test was used to determine the association of complications of PFM crowns with patient related factors. Kaplan- Meier survival analysis was used to determine the survival of PFM crowns. Level of significance was kept at 0.05.

RESULTS
The most common complication observed was open proximal contacts (8.7%) followed by porcelain chipping (6%), decementation (5.3%), and abutment fracture (1.3%).There was no statistically significant association of PFM crown complication with tooth wear, betel nut and opposing dentition (p-value >0.05). The overall success and survival rates of PFM crowns turned out to be 78.7 and 84.7% respectively.

CONCLUSION
 Within the limitations of the study, it can be concluded that PFM crowns is an effective treatment modality with high success and survival rates. Since, it was a single centered study, the results should be generalized with caution.

Biography:

Erum Azal has completed BDS from National University of Sciences and Technology, Pakistan. She is currently doing Training in Orthodontics from Aga Khan University, Pakistan.

Abstract:

Statement of the Problem: The growth of sella turcica is completed early in life; therefore, it may be used to predict the future developing skeletal malocclusion. This can aid in early diagnosis, reduce the future treatment burden and decrease the treatment duration leading to less complicated treatment modalities. Therefore, the aim of this study was to evaluate the relationship between sella turcica dimensions and morphology and various sagittal and vertical malocclusions.

Material & Method: A cross-sectional study was conducted on the pretreatment lateral cephalograms of 180 subjects aged 13 to 19 years. The subjects were divided into two groups based on sagittal and vertical malocclusions. The sella turcica dimensions evaluated were length, diameter and depth measured digitally on view Pro-X software. One-way ANOVA and post-hoc Tukey’s test was applied to compare sella turcica dimensions between sagittal and vertical malocclusions. Chi-square test was applied to compare sella turcica morphology among sagittal and vertical malocclusions. A p-value≤0.05 was taken as statistically significant.

Result: One-way ANOVA showed significant differences between sella turcica length (p≤0.02) and depth in vertical malocclusions (p≤0.03), whereas post-hoc Tukey showed significant differences between sella length (p≤0.03) and diameter (p≤0.04) in normodivergent versus hyperdivergent groups. Significant differences were found in the sella turcica morphology in sagittal malocclusions only (p≤0.03).

Conclusions & Significance: Sella turcica length and depth can aid in predicting the future vertical growth pattern. Increased sella dimensions were found in hyperdivergent vertical malocclusion only. Bridging of the sella turcica was most prevalent in class-3 malocclusion.

Biography:

Durr e Shahwar Malik is the Resident at the Orthodontics Department of the Aga Khan University Hospital, Pakistan.

Abstract:

Statement of the Problem: The impaction of maxillary third molars causes the crowns of maxillary first and second molars to tip distally in patients with maxillary posterior segment discrepancy. The aim of this study was to compare the maxillary first and second molar angulations in patients with Maxillary Posterior Segment Discrepancy (MPSD) with Non-Maxillary Posterior Segment Discrepancy (N-MPSD) and evaluate the effect of their angulations on various divergence patterns.

Materials & Method: A cross-sectional study was conducted using the pre-treatment lateral cephalograms of 180 subjects which were divided into two groups i.e. MPSD and N-MPSD. The Mann-Whitney U test was applied to compare various skeletal and dental parameters between the two groups and a pairwise comparison was made among the vertical growth patterns. The Kruskal Wallis test was used to compare the mean molar angulations and overbite among the three divergence patterns.

Result: The ratio of anterior to total palatal plane (p≤0.001) and the molar angulation (p≤0.001) showed significant differences between the MPSD and N-MPSD groups. In the MPSD group, significant differences were found between the overbite in the normodivergent versus hyperdivergent (p≤0.001) and hypodivergent versus hyperdivergent groups (p≤0.001) and in the angulation of the first maxillary molars in the normodivergent versus hyperdivergent groups (p≤0.001).

Conclusion & Significance: MPSD causes reduced maxillary first and second molar angulations. A ratio of the anterior palatal plane to total palatal plane length of ≥0.51 was seen in patients with impacted maxillary third molars.

Biography:

Qiaojie Luo has completed her PhD degree from Zhejiang University and her Postdoctoral research in 2017. Currently, she is focusing on the surface modification of dental implants and osseointegration mechanism of titanium.

Abstract:

Dential implants of micro topographical surfaces have been widely used in clinic and has obtained high success rate, through the mechanism of increasing the local factor levels to produce an osteogenic environment. Nowadays, nontopographical features are hoped to improve osteointegration and surfaces of Nano-Submicro-micro hybrid topography are prized in biomaterial research. However, to obtain the Nano-Submicro-micro hybrid topographical implant of desirable property is hit-and-miss, without guidance or quantitative topographical parameters to predict biological performance. In the present study, we constructed a series of titanium surfaces of Nano-Submicro-micro topographical feature, through the combination of sandblasting, acid etching and alkali treatment. With the increase time in alkali treatment, the Nano-scale structure strengthened with the micro and Submicro scale structures weakened. In vitro and in vivo studies showed that the osteogenesis of these surfaces, increased first and then decreased. We constructed a set of SEM-image dependent topography analytical methods to quantitatively analyze the topography features of each scales. Based on the series titanium surfaces with high consistence in surface chemistry, matter phase structures and the topography analytical methods, we found that the complexity of structure in each scale played important role in biological activity and it was the sum of complexity in all scales that determined the overall performance of the implant. In further study, we will analyze more surfaces to refine the analysis method and would be a promising model to predict the surfaces of the highest bioactivity in a specific topographical series of implant surfaces.

Biography:

Samaneh Keshavarz has completed her Ph.D. at the age of 31 years from Shahid Sadooqi Yazd. She has published about 6 papers in reputed journals and has published 2 books.

Abstract:

Materials and Methods: This experimental study was performed on 45 male mice randomly divided into three groups of 15. Under general anesthesia, the right maxillary second molar of all the mice were extracted. The socket of the first group was covered with 0.2% chlorhexidine gel and the second group was covered with 10% betadine gel, and the socket of third group was left empty. On the third, seventh and fourteenth days after surgery, one third of the animals were sacrificed from each group. Then the prepared slides from each group were examined. Results: The extent of granulation tissue on the third day after tooth extraction in the chlorhexidine group was greater than the remaining two groups. The number of lymphocyte on the seventh day after tooth extraction in the chlorhexidine group were lower than the control group. The number of macrophage on the 14th day after tooth extraction in the chlorhexidine and betadine groups was lower than the control group. The number of fibroblasts in the chlorhexidine group on the 14th day after tooth extraction were higher than the control group. These differences were statistically significant. Conclusion: According to the results of this study, 0.2% chlorhexidine gel can accelerate the process of tooth socket healing. Key words: Chlorhexidine, Betadine, Tooth socket, Mice.

Biography:

Dentist graduated from the Pontificia Universidad Javeriana, Bogotá - Colombia. Specialist in Pediatric Dentistry and Maxillary Orthopedics at Universidad del Valle, Cali - Colombia. Professor of undergraduate and graduate in the school of Dentistry of the Universidad del Valle. Member of the Pediatric Dentistry and Maxillary Orthopedics research group of the same university. Author of several scientific papers.

Abstract:

The identification of the different risk factors associated with the development of malocclusions is one of the challenges faced daily by the pediatric dentist in order to provide an early diagnosis, and to avoid that these discrepancies are accentuated in the mixed and permanent dentition. According to the WHO, after dental caries and periodontal disease, malocclusions are considered a public health problem and occupy the third place of prevalence. Anterior crossbite is one of the most frequent malocclusions that can be found in the primary dentition. Is defined as the overpassing of the lower anterior teeth to the upper anterior teeth, affecting the anteroposterior plane. Objective: To evaluate the dimensional changes of the primary dental arches treated with lower inclined bite plane as a method of correction of the anterior crossbite. Methods: Ten patients aged 3 to 5 years with complete anterior crossbite were treated with a lower inclined bite plane elaborated in acrylic. An average time of the plane position: 8.5 weeks. Dental casts were obtained in 3 moments T0: before treatment; T1: 6 months after starting treatment, and T2: at the end of the first year of treatment and changes in dimensions of dental arches were evaluated. Results: In 100% of patients the anterior crossbite were corrected, statistically significant differences for the variables evaluated with the therapeutic employed were found. Conclusions: The lower inclined bite plane generated evident dental changes in a short time, without relapses and improving the dimensions of the dental arches, especially the upper arch.

Biography:

Elham Romoozi has completed her Postdoctoral Studies From Dental School of Tehran University of Medical Science. She has Published more than 10 Papers in Reputed Journals.

Abstract:

Background And Aims: Considering Importance Of Recognizing The Position Of Incisive Canal Before Inserting Intraosseous Implants And Bone Harvesting From The Symphysis And To Preventing From Adverse Effects After These Surgeries, Using Appropriate Imaging Method Is Essential And Necessary. Due To The High Accuracy Measurement And High Quality Of Cbct And Also Low Received Dose To Patient ̦ The Aim Of This Study Was To Evaluate And Recognize The Position Of Incisive Canal Using Cone Beam Computed Tomography (Cbct).

Materials And Methods: In This Study, Good Quality Cbct Mandible Image Of 60 Patients Including 32 Women And 28 Men With Average Ages Of 41.3±2.5 Were Observed For Diagnosing And Recognizing The Position Of Mandibular Incisive Canal Using Three Observers Separately. Data Were Statistically Analyzed Using Spss Software (Version 20.0 For Windows, Chicago, Il, Usa) And Chi-Square And Fisher's Exact Tests.

Results: Horizontal And Vertical Assessment Was Independent From The Sex Of Patients. The Incisive Canal Was Recognizable In 89.8 Percent Of Specimens. In Vertical Dimension, In 57.5 Percent Of Specimens The Canal Was Observed In The Inferior One Third And In 32.25 Percent In The Medial One Third. In Horizontal Dimension, In 14.75 Percent Of Specimens The Canal Was Observed In The Buccal One Third, 52.75 Percent In The Medial One Third And 22.25 Percent In The Lingual One Third.

Conclusion: The Quality Of Cbct Imaging And Its Accuracy And Resolution Can Play An Important Role In The Differentiation And Determination Of The Position Of Incisive Canal.

Biography:

Assistant Professor, School of Dentistry, International Campus, Tehran University of Medical Sciences, Tehran, Iran

Abstract:

Background and Aims: The root fracture resistance of endodontically treated teeth depends on the types of posts. The aim of this study was to compare the effect of two types of bonded non-metallic posts with different elasticity modulus on the fracture resistance of endodontically treated teeth under compressive loads.

Materials and Methods: In this in vitro experimental study, 20 fresh extracted mandibular premolars were selected and sectioned adjacent to the CEJ and then were endodontically treated. The specimens were randomly divided into two groups (n=10). After post space preparations, the fiber RTD Light posts (R.T.D, France) and zirconia coated fiber posts (ICE light, Danville) were cemented into the root canals. Composite resin (Lumiglass R.T.D, France) cores were built up. Aluminum foil was used to mimic the PDL, and the specimens were embedded in acrylic resin and tested in a Universal Testing Machine. A compressive load was applied at a 90-degree angle until fracture at a crosshead speed of 1mm/min. Data were analyzed using one-way ANOVA and T test.

Results: The mean fracture resistance of R.T.D group was (1083.11 ± 156.74 (N)) and the mean of ICE light group was (865.18 ± 106.24 (N)). The highest mean fracture resistance was observed in RTD fiberglass and a statistically significant difference was observed between the two groups (P<0.001).

Conclusion: FRC posts with zirconia coating due to unfavorable fractures of the teeth should be used with caution, and thus, fiber posts are preferred. Keywords:  Post,  Fracture,  Resistance,  Zirconia

Biography:

Qiaojie Luo obtained her Ph.D. degree in Zhejiang University and has finished postdoctoral research in 2017. Now, she focuses on surface modification of dental implants and osseointegration mechanism of titanium. 

Abstract:

Dential implants of microtopographical surfaces have been widely used in clinic and obtained high success rate, through the mechanism of increasing the local factor levels to produce an osteogenic environment. Nowadays, nanotopographical features are hoped to improve osteointegration and surfaces of nano-submicro-micro hybrid topography are prized in biomaterial research. However, the obtaining of a nano-submicron-micro hybrid topographical implant of  desirable property is hit-and-miss, without an guidance nor quantitative topographical parameters to predict biologial performance. In the present study, we constructed a series of titanium surfaces of a nano-submicron-micro topographical feature, through the combination of sandblasting, acid etching and alkali treatment. With the increase time in alkali treatment, the nano-scale structure strengthened with the micro- and submicroscale structures weakened. In vitro and in vivo studies showed that the osteogenesis of these surfaces, increased first and then decreased. We constructed a set of SEM-image dependent topography analytical methods to quantitatively analyze the topography features of each scales. Based on the series titanium surfaces with high consistency in surface chemistry and matter phase structures, and the topography analytical methods, we found that the "complexity" of structure in each scales all played important role in biological activity, and it was the sum total of "complexity" in all scales that determined the overall performance of the implant. In the further study, we will analyze more surfaces to refine the analysis method and would be a promising model to predict the surfaces of the highest bioactivity in a specific topographical series of implant surfaces. 

Biography:

Hassan H Koshak is Consultant in Periodontics and Implant Dentistry.

Head of the Dental Department and Dental Educator, Director of Academic and Education Affairs at Comprehensive Specialized Polyclinic, Ministry of Interior Security Forces Medical Services, Jeddah, Kingdom of Saudi Arabia, where he has been since 2016. He received a Saudi Fellowship in Dental Implant from the Saudi Commission for Health Specialties 2014-­â€2016. He received a Saudi Board in Periodontics from the Saudi Commission for Health Specialties 2012 -­â€2014.

He received his Master of Science in Dentistry (MSD) and a Clinical Certificate in Periodontics from Riyadh Colleges of Dentistry and Pharmacy 2009-­â€2012, Riyadh, KSA. With Honours. Also, he received his Advanced Education in General Dentistry (AEGD) from University of South California School of Dentistry 2006-­â€ 2008. And he received his Bachelor of dental medicine and surgery (BDS) from Faculty of Dental Medicine and Surgery, King Abdul-­â€Aziz University, Jeddah, KSA.

Abstract:

Clinical choice of the most appropriate implant therapy modality should be based on an assessment of the residual alveolar bone height, width, and sinus morphology with a cone beam computed tomography (CBCT) scan, current scientific evidence, surgical skills and experience of the surgeon, and the patient’s preferences.

Following a good surgical protocol and excellent oral hygiene maintenance program are fundamental elements in achieving a successful and predictable outcome.

The available evidence on short dental implants in early research was not significant compared with the longer dental implants; the surface treatment is improving now than before for this reason.

The use of short implants allows treatment of patients who are unable to undergo complex surgical techniques for medical, anatomic or financial reasons. By reducing the need for complex surgeries short implants reduce morbidity, cost and treatment time. Recently short implants offer a less invasive treatment alternative in resorbed ridge cases.

Biography:

Mahmoud Rajab he has completed his Ph.D. at the age of 35 years from Scientific Research Institute of Dentistry at the Ukrainian Academy of Sciences, Odessa city.  have published more than 12 papers in reputed journals, obtained in collaboration with the supervisors of the patent (the principle of using laser and electromagnetic waves in the treatment), and other patent for the manufacture of integrated device prototype model.

Abstract:

Evolution used laser at the beginning of this century, particularly in dentistry, we have begun to develop a plan for scientific research in the use of laser in orthodontics. The increase of deformation and jaw disorders at children nowadays leads to the need of new complete developed ways of orthodontic treatment. The increase of deformity and up normality of jaws at children happens with accordance of diseases of gingival tissues and caries; consequently, it leads to hardships of orthodontic treatment.

*The environmental situations which cause effects upon immune system with disorder of accommodation in orthodontic treatment.

*Hygiene, quality and types of materials used during treatment.

Thus, orthodontic Treatment leads to:

 1- Bad immunological state in body system and reformation of bon tissues in the area of moved teeth. 

2 - Destruction of bone tissues and difference in the blood

circulation in gingival tissues.

3 – Up normality of reaction of oral cavity.

     It is necessary to invent new multi-system ways which improve orthodontic treatment, in addition to decreasing of teeth caries and gingival tissues inflammation with correction of reactions in oral cavity.

 Those issues mentioned are some of important problems that have not been followed carefully in traditional orthodontics.

Advantages of laser orthodontics for patients:

With no doubt, we have a big advantage towards the conventional treatment.

It is commonly believed to think of orthodontists as the people who activate brackets. By using laser nowadays, you have technical possibilities to adjust the laser settings in a way that you can treat a patient in an integrated way without teeth caries or gingival tissues inflammation in addition to the correction of reactions in oral cavity,  and Shortening of the period of treatment,  Help in fixing teeth after orthodontic treatment, Activating osteo and gingival cells though, you are still very effective. So, this is a very big advantage. And in addition to the known benefits of the laser effect.

we well notice a correction of reaction resulted during orthodontic treatment with Laser and E. M Waves in the Oral Cavity, we will see:

*   The change of activity of Non-Oxidizing Enzymes of Saliva. Also we will see decreasing of protein, katabsen –D and lactase  concentration,  high concentration of calcium and phosphor     This is confirmed in the case of improving functional reactions in the organism, the low level of inflammation in the oral cavity, Active construction and demolition operations in the bone tissue, change of the activity of enzymes increases: the activity of alkaline and acid-phosphates, There are many factors that have changed such as activity PH and other things affecting the mouth  and physiological  status that we will talk about later.

The main goal obtained here is to get a new model of the use of combined application of lasers and electromagnetic waves (EMW), low density. It is a partnership between the laser and (EMW) in the use of combined therapy at different stages of orthodontic treatment; in which the red laser and infrared are absorbed by protein molecules cells.

Biography:

Attila Kámán has complète his degree at University of Medical Sciences Medical and Dental faculty named after Semmelweiss, and postdoctoral studies, MSc- Master of Science of Implantology at University Münster, Germany. He is the chef surgeon of the Implant center Dental und Maxillofacial Clinic in Budapest. He is leading and maintaining 6 Clinics in 4 countries (London, Geneve, Bern, Zürich/ Kloten, Budapest, Dublin). Chairman of the Association of Leading Hungarian Dental Clinics.
 

Abstract:

Objective: The purpose of this lecture is to examine the incidence rate of early and late failure of dental implants and associated prosthetic problems with reference to a total number of 28.000 implants placed between 1992-2018 in patients requiring partial and full-arch rehabilitation. We have compared the nowadays popular and cost-effective all-on-4 all-on-6 rehabilitation solution with 8-10 implants placed in the maxilla, and 6-8 in the mandible.

Results: Following the adaptation of various dental implant systems, our retrospective study shows that the rate of late implant failure and the associated prosthetic problems were lower in case of increased number of implants. We suggest that the result is due to the balanced distribution of the functional load on the implant and bone, the improved stress distribution against the opening force of the mandible and the overload of posterior implants.

Conclusion: The benefits of the all-on-4 and all-on-6 rehabilitation solution include that (the sometimes risky) bone grafting in the posterior mandible can be avoided, furthermore, the increased inter implant distance ensures improved blood supply. However, excessive overloading of the implants may lead to screw fracture, prosthetic fracture and bone loss. In case of unexpected complications, the increased number of patient visits make the cost-effective all-on-4, all-on-6 treatment concept a subject to controversy. When comparing the risks and complications of the all-on-4, all-on-6 rehabilitation solution with posterior mandibular bone grafting procedures, we can find similar results. 

Biography:

Vidal Perez is a pediatric dentist who completed his Ph.D. in translational research at The University of Melbourne in November 2015. He worked in Mike Hubbard’s Lab (studying the molecular pathogenesis of Molar Hypomineralisation) and is part of The D3 Group (a translational research network focused on better understanding and care of people with developmental dental defects; www.thed3group.org). Currently, he is Director of the Specialization Program in Pediatric Dentistry at the Department of Pediatric Stomatology, School of Dentistry, University of Talca, Chile. He has important publications and has been serving as an editorial board member of repute in Latin America.  

Abstract:

Molar hypomineralization (MH) is a particular type of enamel defects characterised by demarcated opacities mainly affecting 6-year molars of about 1-in-6 children worldwide. Affected molars have greater susceptibility to post eruptive breakdown, extensive caries and, in severe cases, are difficult to restore. When MH molars present severe crown destruction, it is necessary to perform an intermediate restoration to preserve the remaining dental structure in order to maintain occlusion, proper hygiene and periodontal health. Traditional restorations are not suggested in case of severe MH molars. Amalgam requires excessive removal of dental tissue to obtain adequate mechanical retention, leaving the tooth structurally weak and prone to fracture. Resins also present problems since their adhesion to MH-affected enamel is inadequate, favouring microfiltration, which may result in restoration failure. Preformed metallic crowns have been suggested as a more definitive option; however, periodontal problems associated with molars restored with this technique discourage their use as permanent restoration. In these difficult clinical conditions, glass ionomer cement (GIC) seems to be the restorative material of choice for the interim treatment of severe MH molars due to its favourable adhesive properties to enamel/dentin. However, in extensive restorations, GIC usually fractures, leading to retreatment, thus increasing the occurrence of painful clinical experiences and pulpal damage. Here we propose a novel approach to improve the robustness of GIC. After filling the MH molar with modified GIC, an orthodontic band is fitted as a strong metallic casing preserving gingival/pulpal health and tooth structure for at least 18 months.

Biography:

Elham Romoozi has completed her postdoctoral studies from the dental school of Tehran University of medical science. She has published more than 10 papers in reputed journals.
 

Abstract:

Background and Aims: In the panoramic images, palatoglossal space error develops when the patient is unable to put the tongue against the mouth roof. In the case of this error, the radiographic diagnosis of the area is made with some difficulties or ever the image may lose its diagnostic ability. The aim of the present study was to investigate the relationship between the palatoglossal space error of the panoramic images and skeletal relationship.

Materials and Methods: In this descriptive cross-sectional trial, 494 panoramic images were selected at the orthodontic department of Tehran dental school archive and the existence of the palatoglossal space was determined. The palatoglossal space error was statistically analyzed using chi-square test regarding the patients’ gender, age and skeletal relationships.

 Results: Of total panoramic images, 346 (70.0%) cases showed palatoglossal space error while 148 (30.0%) images were free from this error. Furthermore, 74.1% of male images and 66.9% of female images showed palatoglossal space error. In Cl, I (1Ë‚ANB≤3), Cl II and Cl III patients 65.6%, 73.1% and 67.4% of the images demonstrated the error, respectively. The incidence of palatoglossal space error in 5-14 and 15 years old age or higher patients were 72.2% and 58.8%, respectively.

 Conclusion: It was concluded that no significant difference was noted between the incidences of the palatoglossal space error regarding the patients’ gender or their skeletal relationships. The error frequency was significantly decreased with age.

Keywords:Relationship, Panoramic radiography, Skeletal

Biography:

Maryam-Sadat Sadrzadeh-Afshar Oral and Maxillofacial Medicine specialist is now Assistant Professor of Dentistry Faculty of AJA University of Medical Science. She has been doing her research on oral mucositis, lichen planus and facial muscle pain. The present study is part of the results of oral and maxillofacial research that has been carried out over a period of more than one year.
 

Abstract:

Masticatory muscle pain is the second most frequent cause of orofacial pain after dental pain. Myofascial pain dysfunction syndrome (MPDS) is the most common form of temporomandibular joint dysfunction. MPDS is a pain that triggers from [sensitive] points in the muscles and fascia and is followed by spasm, tenderness to palpation, restricted movement, fatigue, and sometimes dysfunction. The researchers intended to collect comprehensive information about therapeutic interventions for myofascial pain through the conduction of a critical study based on evidence in the literature. In this review, 51 English articles, published between 1981 and 2013, were extracted from PubMed, Medline, Ovid, and Google Scholar. These articles were then reviewed in detail in two categories, namely pharmaceutical and non-pharmaceutical treatments. MPDS treatment should be first focused on the identification and correction of underlying causes. Thiocolchicoside (TCC), non-steroidal anti-inflammatory drugs (NSAIDs), and Cox-2 inhibitors are among promising pharmaceutical methods. On the other hand, ultrasound and laser therapy are among promising non-pharmaceutical methods. The complex mechanism of MPDS, along with its underlying peripheral and central nervous mechanisms may make MPDS, difficult to treat, especially in its chronic form.

Biography:

Mona Hamedani Golshan has completed her DDS from Tehran University of Medical Science (TUMS). TUMS Dentistry School is renowned for the excellence in education and practice in Iran and around the globe. She demonstrates her excellence in research on social dentistry by presenting a highly valued research. She is a both practicing dentistry in IRAN and USA.

Abstract:

Background and Aims: This study aimed to assess the severity of tooth decay and related factors in children 5-7 years old, in 2016, in Tehran. Materials and Methods: A descriptive and cross-sectional study was performed on 572 children aged 5-7 years old (300 girls and 272 boys) in public schools in Tehran, Iran. The severity of dental caries (number of decayed, missing, filled surfaces) recorded for C, D and E teeth according to WHO criteria. Data analysis was performed by Backward Linear Regression Analyses using SPSS 20 (P≤0.05). Results: Assessment of dental caries severity according to the number of decayed surfaces showed generally higher figures in the upper jaw. The order of average severity of carious teeth was C, E, and D from low to high in both jaws. According to the results of Linear Regression Analysis, severity of dental caries was more than other children in boys (OR=1.83, 95%CI: 0.81- 2.8), those visited dentist due to dental problems associated with pain (OR=1.17, 95%CI: 0.73- 1.6), and those without fluoride therapy (OR=1.64, 95%CI: 0.58-2.6) in C, D and E teeth. Conclusion: Flow the results, it was concluded that gender, level of mother's education, type of snack consumption, start age of tooth brushing, the reason for the dental visit and fluoride therapy affected the severity of tooth decay. Keywords: Dental caries, Diet, Oral hygiene, Dmfs index

Biography:

Ahmed Alshabab has completed his post-doctoral training in periodontics and dental implants from University of Pennsylvania School of Dental medicine USA in 2016. He received Master of Science degree in oral biology from the same institution in 2016. Conferred the fellowship of the Royal College of Dentists of Canada in Periodontics in 2016 and Diplomate of the American Board of Periodontology in 2017. He is the assistant professor of Periodontics and dental implants at Najran University Faculty of Dentistry. Saudi Arabia. He is vice-dean for development and quality at Najran University Faculty of Dentistry. Saudi Arabia.

Abstract:

When a tooth extracted, the alveolar bone around it will tend to resorb. The reduction in alveolar ridge width and height after tooth extraction is evident in the literature. Dental implants can be used to replace teeth after extraction. However, in some situations, the bone resorption reaches to the point where replacement with dental implants become impossible. Ridge deficiency could be in bone height or width or in more advanced cases associated with soft tissue deficiency. Conditions, where alveolar bone/soft tissue is reduced, may result in biological/functional and or esthetic failures. A procedure known as Ridge Preservation may limit such reduction of alveolar bone following teeth extraction. The purpose of the ridge preservation procedure is to keep the width and height of the extraction socket. Many techniques, bone graft, membranes, and biologics have been introduced in this filed. The aim of the paper is to review several techniques and materials used for ridge preservation and suggest a flowchart for decision making in ridge preservation procedure.

Biography:

Samaneh Keshavarz has completed her PhD from Shahid Sadoughi University of Medical Sciences, Iran. She has published about 6 papers in reputed journals and has published 2 books.

Abstract:

Statement of the Problem: Tooth extraction is the most common surgical procedure performed in dental office. Various drugs are used to accelerate wound healing in soft and bone tissues. In this study, the effect of 0.2% chlorhexidine gel and 10% betadine gel on tooth socket healing was investigated.

Materials & Method: This experimental study was performed on 45 male mice randomly divided into three groups of 15. Under general anesthesia, the right maxillary second molar of all the mice were extracted. The socket of the first group was covered with 0.2% chlorhexidine gel and the second group was covered with 10% betadine gel and the socket of third group was left empty. On the third, seventh and fourteenth days after surgery, one third of the animals were sacrificed from each group. Then the prepared slides from each group were examined.

Result: The extent of granulation tissue on the third day after tooth extraction in the chlorhexidine group was greater than the remaining two groups. The number of lymphocytes on the seventh day after tooth extraction in the chlorhexidine group was lower than the control group. The number of macrophage on the 14^th day after tooth extraction in the chlorhexidine and betadine groups was lower than the control group. The numbers of fibroblasts in the chlorhexidine group on the fourteenth day after tooth extraction was higher than the control group. These differences were statistically significant.

Conclusion & Significance: According to the results of this study, 0.2% chlorhexidine gel can accelerate the process of tooth socket healing.

Biography:

Dr.Iru Prajapati (Endododntist) from Nepal ,had completed her MDS on 2016 from Xi’an Jiaotong University,Xi’an ,China and BDS from Manipal University.

She is working as endodontist in Oracare Periodontal Clinic , Kathmandu.Her publication article as second author in JNDA of Nepal.

Abstract:

Teeth with same angle of curvature can have different position of cuvature(PC).  With this we come to know that beside the  shape and angle of a root canal , there is another contributing factors which influence in the removal of separated instrument is position of curvature(PC). .

PC value lower than 0.5 represented curvatures that were concentrated in the cervical third; PC value ranging from ≥0.5 to < 2.0 represented curvatures concentrated in the middle third; and, PC value above 2.0 represented curvatures in the apical third . Using this method on the radiograph of the extracted teeth, PC was noted more on the middle and apical third. PC at cervical third was discarded because fracture made at this position can be easily removed. So the fracture of file was made at the apical third of selected root canal. Fracture file from root canal was attempted to remove using dental operating microscope and ultrasonic tips. Furthermore using CBCT comparative 3D volumetric analysis was done using mimics software.

The aim of this study was to evaluate the removal of separated file from different position of curvature (PC) and angle of curvature ranging from ≥30° - ≤45° within  the time limit 30 minutes ,and also determine the comparative 3D volumetric analysis of root canal using CBCT.It also further aimed to help the clinician & endodontists to perform a benefit/risk analysis before removal of a separated instrument in a root canal with different PCvalues.

Biography:

Dr Meera Acharya is recently graduated from Guangxi Medical University, Nanning China in Conservative and Endodontics and is presently working in a private Hospital in the home town in Nepal.

Abstract:

Introduction: To compare the coronal sealing ability of SOR flowable Composite with other materials (f.iJ!E?K Z350 XT and GIC Fuji type II) and investigate the influence of different adhesive systems E?J19 V and Prime & Bond NT) on the sealing performance of SOR flowable Composite when used as an intra orifice barrier after root canal treatment.

Methods: 54 freshly extracted human mandibular first premolar teeth with single canal were selected for the experiment and root root canal treated. After completion of RCT the teeth were divided into two groups: experimental and control. The experimental group was further divided into four sub groups as XT group, SP group, SP group and GC group and the cont  394 words group was divided into two groups as PC group and NC group. The coronal 3.5 mm of gu. percha were removed from all the samples in the experimental group and and the prepared cavity is restored with the different restorative materials used in the experiment like f. iJ! E? - 9Q XT, SDR flow and GIC Fuji type II. The samples in the control group is simply left as it is with gutta percha till the coronal orifice. All the samples were then incubated for one yy  h,Jh! TLQP.Y J. Q in hot and cold baths simultaneously for 500 cycles and finally stained   in 1% Methylene blue solution for another one week in the incubator. The samples were then split longitudinally, and the depth of dye penetration was measured under a Stereomicroscope.

Results:

The rojs.; r: q.(P<0.05) l ft Sil.9 index of the SX group was significantly lower than the other groups while the coronal sealing ability of GC group was significantly lower than that of the other groups (P<0.05) and was not significantly different than the control group (P<0.05) CONCLUSION: GIC Fuji Type II can be considered unsuitable as an intra orifice barrier while SOR flowable composite in combination with J19 V can be used as an ideal intra orifice barrier after the completion of root canal treatment.

Biography:

Hari Parkash has completed his Bachelor’s from Punjab University in 1965 and his Masters in Prosthodontics in 1968. He has been conferred Fellowship in Dental Surgery by Royal College of Physicians and Surgeons of Glasgow (2007), Fellowship in Dental Surgery of the Royal College of Surgeons of England (2013) and Fellowship of Royal College of Surgeon (Edinburg) in 2017. He was also Project Director for the NOHCP of GOI, for six years. He has authored and co-authored over 296 scientific papers both in national and international journals. He has an experience of 51 years as an Academician and Clinician.

Abstract:

McGill’s consensus recommended a two-implant supported mandibular overdenture as the basic minimum care to be delivered for the rehabilitation of edentulous patients. It is generally believed that two or four implants if splinted provide a better distribution of forces to the implants and increase the longevity of the treatment. However, unsplinted implants have also shown to give comparable results. One of the methods to analyze implant success is the bone quality around the implant. CBCT allows for an estimation of bone quality around the bone implant interface and is feasible in human studies as published in 2017 by Wuhan University, China. Thus, a study was undertaken to compare the bone quality around four endosseous implants placed in each of eight patients, immediately after placement and six months after prosthetic loading with mandibular overdenture using unsplinted Dalla bona attachments. Bone quality was assessed at four junctions of the implant length from apex to crest module at varying intervals of time using CBCT. The post implant placement scans and post implant loading scans were analyzed using the fusion tool in CBCT software to enhance the standardization of the procedure. The study concluded that four unsplinted implants using Dalla bona attachments is a favorable treatment modality for implant supported mandibular dentures. 24 implants out of 32 implants analyzed showed no significant decrease in bone quality values. In the intergroup comparison among implants placed in different positions no significant change (p>0.05) in bone quality was observed post loading.

Biography:

Praful Mehra has completed his Postgraduation in Prosthodontics in 2011 from India. He is Fellow of International Congress of Oral Implantologists, Diplomat of World Congress of Oral Implantologists Japan, Fellow of International College of Dentists and Fellow of Pierre Fauchard Academy. He was involved in teaching for six and half years after his post-graduation and was a PG Guide and Co-Guide for more than 8 researches. He was awarded Best Postgraduate Prosthodontics by ICD Section 6 in 2012. He has publications at both national and international level and maintains a private practice in New Delhi.

Abstract:

Guided implant surgeries aided with cone beam computed tomography and stereolithography or three D printing has helped enhance precision in implant surgeries making them more prosthetically oriented. Recently many companies are coming up with universal open guide systems. However, it becomes imperative to know the level of accuracy of the universal open guide systems. Thus, a study was undertaken to analyze and compare the deviations in the position and inclination of the virtually planned and actually placed implants using universal open surgical guide. The purpose of this study was to determine and to compare the precision of 3-D image-guided implant rehabilitation in vitro. The implant positions and angulations were determined using a vision measuring machine. For the purpose of this study, a total of 24 implants were placed in 8 replaceable bone blocks which simulated the mandibular posterior edentulous bone. In each bone block, 3 implants were placed. These 24 implants were then evaluated for accuracy in linear (mesio-distal and vertical directions) and angular measurements. The baseline measurements were the C.B.C.T derived planning for implant placement. Descriptive statistics was calculated for each variable of the group B (Guided Implant placement) with respect to the control group (C.B.C.T) using ‘1-Sample T-test’ in relation to each parameter studied i.e. vertical distance, linear distance and perpendicularity. It was concluded that the stereolithographic universal open guide used in the study may be considered accurate for placement of implants in horizontal or mesio-distal position and also in terms of perpendicularity but not in vertical position.