Day 1 :
Keynote Forum
Hugo Terrones Garrido
University of Nuevo Leon, Mexico
Keynote: Distalization of the Maxillary Posterior Segments Using Efficient Miniscrew Implant Mechanics
Time : 9:30 - 10:15
Biography:
Dr. Hugo Terrones Garrido has completed his MS, in Orthodontics at Universidad Autonoma de Nuevo Leon, Mexico, he is a current professor of Oclusion at Universidad Juarez del Estado de Durango, he is also a lecturer in Miniscrew and implant mechanics in several Universities around Mexico. He is a past president of the Durango Orthodontics Society.
Abstract:
Objectives: To show how the posterior segments of the maxillary dentition can be efficiently distalized by using palatal Miniscrew implants and a lingual bonded splint.
Methods: A 14-year-old patient with class II malocclusion was treated by using a custom lingual splint (laboratory made) and bonding it to the palatal surfaces of the maxillary posterior teeth (first premolar, second premolar, first molar and second molar).
This splint has one guiding tube per side at the level of the each first molar where the trans palatal distalizing sliding tube is placed. Two Miniscrew implants are placed in the parasagital region of the palate at the level of the first molar so that the distalizer is activated using 250grs of force per side. This activation creates two forces, one above and one below the center of resistance of the posterior segment that will distalize the whole posterior block of teeth as one unit with minimum tipping. The device is only activated once until the teeth have moved distally and more activation is required.
Results: in 6 months of treatment a distalization of 6 mm of the whole maxillary posterior segments was observed with minimum tipping. After this, retraction and space closure of the maxillary was possible to finish the case with good oclusion.
Conclusions: this case has shown this method to be a simple way to distalize the maxillary posterior dentition. Vertical control was also possible by using this mechanics, when evaluated by radiographs.
Keynote Forum
Tuong Nguyen Nguyen
Polaris Dental Specialists & Case Western Reserve University, USA
Keynote: “Surg & Rescue†... Saving the “Natural Implant†through Modern Minimally-Invasive, Laser-Assisted Apical Microsurgery
Biography:
Dr Nguyen 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. Dr Nguyen 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. Dr Nguyen is the founder of Polaris Dental Specialists and the Love All Foundation. He currently practices at Polaris Dental Specialists, a multi-speciality practice in Beaverton and Salem, OR, USA. Dr Nguyen is a Master at the World Clinical Laser Institute and Adjunct Professor of Endodontics at Case Western Reserve University. He is fluent in English, French, and Vietnamese and enjoys lecturing about clinical endodontics and practice management at both national and international levels.
Abstract:
As dentists, our goal should always be to save the natural tooth or “natural implant.” Extraction should only be the last resort. Adequate training, experience through continual practice, and specialized equipment provide the adequate context to address cases that represent an unusual challenge. In the case of complex anatomy where the root apex cannot be properly cleaned and periapical healing cannot be obtained, the dentist or endodontist is faced with the challenges of diagnosing properly, planning adequately and executing effectively without causing unnecessary harm to the patient. In such cases, apical micro-surgery is recommended to complement the orthograde endodontic treatment, with the ultimate goal of saving the natural tooth.
It is unfortunately not uncommon to find general dentists and endodontists recommend against apical surgery due to lack of training or practice and therefore fear of performing apical surgery. This fear factor is enhanced even further with the concern of causing further harm to structures such as the sinus or mental foramen. In addition, apical surgery is often underestimated as to its ability to induce periradicular healing. Such concerns could be much alleviated if accuracy and effectiveness is warranted when performing such procedure.
Even though CBCT is highly accurate in all 3 dimensions, its high cost deters many clinicians from owning such technology and using it in their day-to-day practice. CBCT scans improve accuracy in visualization of apical pathosis, critical anatomical structures (mental foramen, sinus) and root anatomy. Additional benefits include effectiveness in locating all main root canals, analysis of resorptive lesions and pre-surgical assessment prior to apical surgery.
Effectiveness is enabled through the use of the Er,Cr:YSGG iPlus laser. Laser irradiation provides an extremely precise cut through the interaction of laser energy with the tooth surface. Its optimal zone of ablation lies within 2 to 3mm from the laser tip. Therefore, when the iPlus laser is coupled with enhanced magnification, the clinician is capable of delivering an unrivaled level of precision.
In addition to precision, the iPlus is also known to be superior to mechanical methods in eradicating bacteria from dentinal tubules at a depth of 1000μm; when applied to the removal of the root apex, accelerated post-surgical healing can be attributed to the laser’s ability to remove the smear layer and its excellent bactericidal potential.
Fianlly, the minimally-invasive effect of the Er,Cr:YSGG iPlus laser is undeniable. The level of cell necrosis is 30:1 ratio when comparing the scalpel to the Er,Cr:YSGG laser.
Diode lasers on the other hand are well known for their ability to induce biostimulation, also known as LLLT or Low Level Laser Therapy. In such process, low levels of laser energy enhance healing while decreasing the deleterious effects of inflammation and therefore unnecessarily prolonged periods of pain.
In sum, the Er,Cr:YSGG iPlus and diode EpicX lasers paired with CBCT technology and the Dental Operating Microscope, should be more widely taught and used in endodontics. Unfortunately, poor training and misuse of these devices have led to misunderstanding and suspicion of their true capabilities. A combination of open-mindedness and concerted educational effort is needed from educators, researchers, clinicians and vendors to provide our patients with the modern technology that they deserve at the dawn of the 21st century.
In this lecture, Dr. Nguyen will demonstrate the scientific evidence, indications, clinical step-by-step and tremendous patients benefits of laser-assisted apical microsurgery. Clinical cases and videos will be used to illustrate the principles
Upon completion of the session, attendees shall be able to
1) Adequately treatment plan for orthograde retreatment versus apical surgery
2) Understand the basic foundation of conventional apical surgery
3) Understand the benefits and clinical steps of laser-assisted apical surgery
4) Integrate the the Dental Operating Microscope and CBCT as part of the endodontic surgical armamentarium
5) Understand Return On Investment for the Dental Operating Microscope, CBCT and laser technology
Keynote Forum
Kenneth K H Cheung
Morgan Street Dental Centre, Australia
Keynote: Management of a challenging case involving treatment planning and restoration of an implant-supported mandibular full-arch hybrid bridge
Time : 11:00-11:45
Biography:
Kenneth K H Cheung maintains a private dental practice in NSW Australia, emphasizing on aesthetic, implant and restorative dentistry. After completing his Degree at University of Toronto, he completed his dental degree from University of Western Australia. He has also received his Postgraduate Certificate from University of Adelaide, Post-Graduate Diploma in Oral Implantology from University of Sydney and Masters in Aesthetic Dentistry from University of London. He has published a case report on Inman Aligner and a literature review on “treatment planning considerations for cemented versus screw-retained single tooth dental implant restorations in aesthetic zones” in the Journal of Implant & Advanced Clinical Dentistry.
Abstract:
This is a case presentation of a 70 years old male who presented at my dental clinic with the following oral complaints: History of implant failure, poor aesthetics, loose and uncomfortable existing removable dentures, failing implants.
Dentistry can be full of surprise and challenges. The aim of this oral presentation is to explain the complications aroused during implant treatment for this patient and discuss how this case was managed in an evidence-based approach.
List of complications encountered are presence of peri-implantitis in the existing MIS implants, maxilla and mandible atrophy, limited inter-occlusal distance, early implant failure with new Straumann implants, wrong selection in the type of dental implants, Non-parallel implants placed, challenge in impression procedure, limited parts available from the implant supplier, poor access for hygiene maintenance
Keynote Forum
Golmoradizadeh Ali
University of Philippines, Philippines
Keynote: The effect of ultraviolet photo functionalization on surface and torsional strength of different orthodontic mini implants
Time : 11:45-12:30
Biography:
Golmoradizadeh Ali has obtained Doctor of Dental Medicine degree from Centro Escolar University in 2013 and MS Orthodontics from University of Philippines. He is a Faculty Member of University of Hormozgan, Iran, Succefully completed one-year Research Fellowship course and is an Associated Editor of Journal of Evaluation of Medical and Dental Sciences.
Abstract:
The mini-implants are an adjunctive device that can be inserted into specific intraoral bony structures to provide anchorage to prevent unwanted tooth movements. The use of mini-implants as temporary anchorage devices has grown to be a valuable component of orthodontic treatment. Mini-implants have expanded treatment possibilities by decreasing dependence on patient compliance, reducing unwanted tooth movements and facilitating previously unattainable or difficult tooth movements. Ultraviolet (UV)-mediated photo functionalization immediately before use, by a combination of UV-A and UV-C for aging the titanium surface, is a recently reported method of surface modification of titanium to increase its biologic capacity. It is characterized by remarkable efficacy, unique mechanisms and a simple delivery method. The present in vitro study was undertaken to investigate the influence of the effect of photo functionalization and its effect on the initial stability. Therefore, the aim of this study was to evaluate the effect of ultraviolet light treatment of titanium or photo functionalization on surface carbon content and on torsional strength of untreated and photo functionalized orthodontic mini implants. Also, to compare the effect of photo functionalization time on torsional strength between untreated and 7 minutes photo functionalized and 15 minutes photo functionalized orthodontic mini implants. The effectiveness of photo functionalization has been proven for all surface topographies tested. The technology does not alter the existing topography, roughness or other morphologic features of the implants and is categorized as neither an additive nor a subtractive method.
Session Introduction
Soonshin Hwang
Yonsei University Gangnam Severance Dental Hospital, South Korea
Title: Considerations of maxillomandibular transverse discrepancies in orthodontic treatment
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.
Tuong Nguyen Nguyen
Polaris Dental Specialists & Case Western Reserve University, USA
Title: Comm-Endo.... the root elite!
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
- Understand what makes one an expert without being an Endodontist
- Discern which equipment to include in their armamentarium and which not to invest in
- Understand how to incorporate their Team in providing expert care
- Integrate foundational concepts of how to increase fees while INCREASING patients flow
- 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.
Shizrah Jamal
Aga Khan University Hospital, Karachi, Pakistan
Title: Evaluation of complications observed in Porcelain Fused to Metal (PFM) crowns placed at a teaching institution
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.
Erum Afzal
Aga Khan University, Pakistan
Title: Association between variations in sella turcica size and morphology and sagittal and vertical malocclusions
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.
Qiaojie Luo
Zhejiang University, China
Title: Establishment of a topography analytical method for activity prediction of nano-submicro-micro hybrid titanium surfaces
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.
Samaneh Keshavarz
Rafsanjan University of medical sciences, Iran
Title: Comparison of 0.2% Chlorhexidine Gel and 10% Betadine on Healing of Tooth Socket in Mice
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.
Carolina RodrÃguez Manjarrés
University of the Valley school of dentistry, Cali - Colombia
Title: Treatment of Anterior Crossbite With Lower Inclined Bite Plane. Effect on the Dental Arches
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.
Elham Romoozi
Kashan University of Medical Science, Kashan, Iran
Title: Diagnosis of Incisive Canal in Patients Referred to Radiology Department of Dental Faculty of Tabriz University of Medical Sciences Using Cone Beam Computed Tomography
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.
Mona Sadegh
Tehran University of Medical Sciences, Iran
Title: A Comparison Between the Effect of Zirconia-Coated FRC and Glass Fiber Posts on the Fracture Resistance Of Endodontically Treated Teeth
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
Qiaojie Luo
Zhejiang University, China
Title: Establishment of a Topography Analytical Method for Activity Prediction of Nano-Submicro-Micro Hybrid Titinium Surfaces
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-†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.