Day :
- Track 1: Periodontology Track 2: Cosmetic Dentistry Track 3: Scaling and Root Planing Track 4: Dental Implants
Chair
James L. Ratcliff
President and CEO Rowpar Pharmaceuticals, USA
Co-Chair
Klenise Paranhos
New York University School of Dentistry, USA
Session Introduction
Klenise Paranhos
New York University School of Dentistry, USA
Title: The effect of collar designs and developments over the years on soft tissue and bone level
Biography:
Klenise Paranhos is currently working as a faculty in New York University College of Dentistry, Comprehensive Care Postgraduate International Program, Cariology and Comprehensive Care, New York City, United States.
Abstract:
The integration between implants hard and soft tissues is extremely important and responsible for the success of dental implants. Soft tissues disrupter with consequentially crestal bone loss along the dental implant surface disturbs the prognosis and the success rate of the implant. It is well known to occur when the implant surfaces were exposed and contaminated by the biofilm, generating the marginal tissue inflammation. Different configurations were proposed with the goal of reducing the amount of early MBL (marginal bone level) around the implants, suggesting more stable bone– implant interface. According to the literature, the polished area sub-crestally facilitates higher rates of early MBL, whereas a rough implant surface placed at the bone level reduces the amount bone loss. However, in long term, this crestal bone can be disturbed when the collar get exposed to oral cavity by any degree of inflammation. All these designs introduced to the implant collar may lead to a decreased amount of initial bone loss at the crestal level to prevent the break of the biological seal and consequentially loss of the implant. The question remains as to whether the surface structure on the collar of the implant exposed can be a genuine reason on the majority of implants failures rate. The objective of this presentation is to review a collar design that is available today that can create better biological seal and consequentially preserve the soft tissue health.
Cumhur Sipahi
Gulhane Military Medical Academy, Ankara, Turkey
Title: Benefits of three innovative direct attachment incorporation methods in order to prevent or minimize metal housing debonding
Biography:
Cumhur Sipahi is currently working as a Professor in the Department of Prosthodontics, Gulhane Military Medical Academy, Ankara, Turkey. He has published many articlespapers in various journals. He has completed his PhD from Department of Prosthodontics, Gulhane Military Medical Academy, Ankara, Turkey.
Abstract:
Purpose: The aim of the present clinical study was to display the benefits of three innovative direct attachment incorporation methods in order to prevent or minimize metal housing debonding from dentures, attachment malpositioning, and acrylic resin entrapment within attachment undercuts in implant supported mandibular overdentures.
Methods: Three innovative methods: Pre-coating of metal housings with autopolymerizing acrylic resin (AAR), fabrication of acrylic resin bars for optimal parallelism, and block-out of attachment undercuts with light-cured composite resin onto circumferential plastic spacers were applied to totally 9 patients in order to minimize the incorrect positioning of the attachment components, to prevent debonding of metal housings from the denture and the avoid entrapment of the AAR around the implant-attachment interfaces.
Results: Not any acrylic resin entrapment within implant-attachment interface was detected. The positioning of the attachments was correct. After a follow-up period of 1 year, not any debonding of metal housing was seen and all patients used their dentures without any severe complaint. Clinical and radiographic evaluations did not reveal any pathological sign.
Conclusion: It was concluded that the 3 innovative direct attachment incorporation methods used in the present study could be used as appropriate alternatives in the attachment incorporation procedures of implant-supported mandibular over-dentures.
Cumhur Korkmaz
Gulhane military medical academy, Turkey
Title: Marginal fit comparison of hip (hot isotatic pressed) zirconia copings fabricated with three different marginal finish lines
Biography:
Cumhur Korkmaz is currently working in Gülhane Military Medical Academy, Turkey. He is an Assistant Professor at Gata Haydarpasa Training Hospital and
Assistant Professor of Prosthodontics at the G.A.T.A - Haydar Pasha Training and Research Hospital. Gülhane Military Medical Academy (GMMA) was founded on December 30, 1898 with the contributions of German physicians, Prof. R. Rieder, MD and Prof. G. Deycke, MD, as a modern hospital of the era under the name of Gülhane Military Practice School and Hospital in Istanbul.
Abstract:
Objective: The purpose of this in-vitro study was to compare the marginal fit of hot isostatic pressed (HIP) zirconia copings fabricated 3 different marginal finish lines.
Material & Methods: To simulate prepared teeth, 30 stainless steel core specimens were fabricated via CNC machining. Stainless steel specimens, which are 6 mm crown length, 1,2 mm finish lines width and 60-degree axial wall inclination angle, were prepared for comparison. These specimens were prepared and separated 3 different marginal finish lines as shoulder finish line (SHO), chamfer finish line (CHA), bevel finish line (BEV). 30 HIP (hot isostatic pressed) zirconia copings with 3 different finish lines configuration
were fabricated with DCS Precident CAD-CAM System to fit onto stainless steel core specimens.
Results: Marginal gap measurements were performed using a stereomicroscope with x150 magnification. Obtained data were analyzed with the SPSS 15.0 statistical software program. Kruskal-Wallis test was used to comparison of multiple groups. The average marginal gap values were obtained as follows, respectively: Group SHO/HIP (35.8±13.5μm) < Group CHA/HIP (44.3±13.3μm) < Group BEV/HIP (55.7±27.6μm). Statistically significant difference was found between groups with different finish line (p<0.001).
Conclusion: The amount of marginal gap at hot isostatic pressed (HIP) zirconium frameworks has been affected by different finish line.
Seyed Hadi Sajjadi
Hormozgan Aluminum Corporation, Iran
Title: Effects of three types of digital camera sensors and two camera lenses on dental specialists’ perception of smile esthetics: Two double-blind clinical trials
Biography:
Seyed Hadi Sajjadi is currently working in X-Ray Lab, Hormozgan Aluminum Corporation, Iran. He has completed his PhD from Islamic Azad University Branch North Tehran in 2009-2011. He is a fellow in Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran.
Abstract:
Purpose: The effect of image quality or dental specialties on the subjective judgment of facial beauty has not been evaluated in any study. We evaluated the effect of digital sensors, camera lenses and dental specialties on the perception of smile beauty.
Materials & Methods: In the first phase of this double-blind clinical trial, 40 female smile photographs (taken from dental students) were evaluated by a panel of 3 prosthodontists, 6 orthodontists, and 3 specialists in restorative dentistry, to select the most beautiful smiles. In the second phase, the 20 students having the most appealing smiles were again photographed in standard conditions, but this time with three different digital sensors: Full-frame 21.1-megapixel, half-frame 18.0-megapixel and compact 10.4-megapixel. The same was repeated with two different lenses: Regular and then macro lenses. The same panel judged smile beauty on a visual analog scale. The referees were blinded of the type of sensors and the images were all coded. The data were analyzed using two-way ANOVA, Kruskal-Wallis and Mann-Whitney U tests (α=0.05, α=0.0167).
Results: The mean scores for full-frame, half-frame, and compact sensors were 6.70±1.30, 4.56±1.29, and 4.40±1.39 [out of 10], respectively (Kruskal-Wallis P=0.000). The differences between the full-frame with the other sensors were statistically significant (Mann-Whitney P values<0.01). However, the difference between the half-frame and compact sensors was not statistically significant (P>0.1). The scores given by groups of specialists were not statistically different (Kruskal-Wallis P=0.7). Sensors (ANOVA P=0.0000)
but not specialties (P=0.687) affected the perception of beauty. The lenses led to similar scores of beauty perception (Mann–Whitney P=0.8). There was no difference between subjective beauty perception of specialties (Kruskal–Wallis P=0.6). Two-way ANOVA indicated no significant role for lenses (P=0.1750), specialties (P=0.7677), or their interaction (P=0.7852).
Conclusions: The full-frame sensor produced consistently better results and was recommended over half-frame and compact sensors. The photographs taken by a regular lens and then digitally magnified can be as appealing as close-up photographs taken by a macro lens. Dentists of different specialties might have similar standards of smile beauty, although this needs further assessment.
- Track 5: Sedation dentistry and General Anesthesia Track 6: Treatment modalities Track 7: Periodontal & Prosthodontal Disease Track 8: Dental Implants
Session Introduction
Rebecca Mayall
University of Tennessee Health Sciences, USA
Title: Assessment of the effect of the use of bisphosphonates on dental implant rehabilitation and peri-implant tissues
Biography:
Rebecca Mayall has completed her DDS in 2011 from the University of Tennessee, Health Science Center College of Dentistry in Memphis, Tennessee. After completing her degree, she divided her time between private practice and working as a clinical instructor at the College of Dentistry. In 2013, she was hired as an Assistant Professor in the Prosthodontics Department where she currently lectures in the preclinical courses and instructs in the clinic.
Abstract:
Long-term use of bisphosphonates (BP) is associated with the risk of BP-related osteonecrosis of the jaw (BRONJ). The number of post-menopausal women receiving BP therapy for osteoporosis continues to increase as the life expectancy increases. Dental implant rehabilitations have progressed over the years. The purpose of this study was to evaluate the peri-implant conditions of patients taking oral or intravenous (IV) BPs. This was a retrospective study using an ORACLE database search by means of a Procedural Language/Structured Query engine. Fifty female patients with dental implant rehabilitations and taking bisphosphonates, and fifty female patients with dental implants but not taking BP were evaluated. Peri-implant health and rehabilitation conditions were collected and statistics analyzed. Data analysis revealed a strong indication (p<0.01; 82.81%) of the existence of association between abscesses and the use of bisphosphonates. Relative risk indicated 25 times more chance of a person that does not use bisphosphonates to develop abscess when compared with people using bisphosphonates. This shows that the use of bisphosphonates may play a protecting role in the patients with dental implants. Alternatively, there was a strong indication (p<0.01) of existence of association between the occurrence of mucositis and the use of bisphosphonates. Most of the cases of mucositis (94.44%) occurred in patients that used bisphosphonates while the majority of the cases where mucositis did not occur (59.76%) referred to the group being treated with bisphosphonates. This study revealed that there were not indications of significant associations between doses of bisphosphonates and the occurrence of peri-implant diseases.
Alper Akgürbüz
Gulhane Military Medical Academy, Turkey
Title: Interdisciplinary rehabilitation of missing maxillary lateral incisors
Biography:
Alper Akgürbüz has completed his PhD from Department of Prosthodontics, Gulhane Military Academy, Medical Academy Department of Prosthodontics. He has attended several international dental congresses and symposiums and presented oral and poster presentations. He is currently working at Etimesgut Military Hospital in Ankara, Turkey.
Abstract:
Treatment planning for missing maxillary lateral incisors is a common clinical predicament encountered by orthodontists and prosthodontists. Three main treatment options exist including: canine substitution; a tooth supported restoration; or a single tooth dental implant. An interdisciplinary approach is important throughout treatment planning, and subsequent treatment can involve dental team members such as an orthodontist, oral and maxillofacial surgeon and prosthodontist. The advantage of using dental implants to replace maxillary lateral incisors lies in excellent success and survival rates, and the lack of need to involve adjacent teeth in a fixed restoration. A 23 year old male patient was referred to the clinic after appropriate orthodontic treatment had been completed. Computerized tomography and clinical examination revealed that two narrow dental implant could be placed for congenitally missing maxillary lateral incisors. Three months after the placement of implants, a modified flap was applied for increasing the buccal soft tissue. Subsequently soft tissue healing, prosthetic restorations were completed with zircone porcelain restoration. The predictability of implant therapy has revolutionized how clinicians treat a wide array of tooth replacement situations, including the problem of a congenitally missing maxillary lateral incisor. Although a number of therapeutic alternatives should be considered, treatment with implants allows the clinician to avoid the preparation of adjacent teeth and provides a predictable and enduring solution to the clinical problem.
Faruk Emir
Gulhane Military Medical Academy, Turkey
Title: Full-mouth rehabilitation of a patient with severe dental wear
Biography:
Faruk Emir has completed his PhD from Department of Prosthodontics, Gulhane Military Medical Academy, Ankara, Turkey. He is working as a Clinical Assistant in Gulhane Military Medical Academy, Department of Prosthodontics. He has published more than 8 papers in various reputed journals.
Abstract:
Severe tooth wear occurs with dental hard tissue destruction due to pathological reasons. Excessive occlusal wear can also cause loss of vertical dimension. In this case after a detailed examination the aim was to recreate the lost occlusal vertical dimension, and to restore the function and esthetics with fixed and removable restorations. Fifty-eight-year-old male patient referred to our clinic with a complaint of impaired esthetics and loss of masticory function. Some of his teeth underwent crown lengthening operation by means of endodontic treatment and prefabricated post along with incrementally built core restorations. Upper and lower classical partial removable prosthesis was fabricated with autopolymerizing acrylic resin material. The occlusion was set according to the canin protected design and followed-up for 2 months with 1-week-interval appointments for the fine re-adjustment of occlusal contacts. After the control of vertical dimension for 2 months final metal-ceramic restorations were fabricated. In the next step maxillary and mandibular removable prosthesis were fabricated and treatment was finished. No complications in our patient and the esthetic, functional and psychological outcomes were all positive 6 months after the end of the treatment. Severe dental wear is compromising for chewing, speaking and esthetic appearance of the dental patients and loss of vertical dimension challenges the treatment. A treatment approach has to be applied with care and patient satisfaction has been achieved in function and aesthetics.
Klenise Paranhos
New York University School of Dentistry, USA
Title: The novel device to remove the cold welded connection implant restoration
Biography:
Klenise Paranhos is currently working as a faculty in New York University College of Dentistry, Comprehensive Care Postgraduate International Program, Cariology and Comprehensive Care, New York City, United States.
Abstract:
The integration between implants hard and soft tissues is extremely important and responsible for the success of dental implants. Soft tissues disrupter with consequentially crestal bone loss along the dental implant surface disturbs the prognosis and the success rate of the implant. It is well known to occur when the implant surfaces were exposed and contaminated by the biofilm, generating the marginal tissue inflammation. Different configurations were proposed with the goal of reducing the amount of early MBL (marginal bone level) around the implants, suggesting more stable bone– implant interface. According to the literature, the polished area sub-crestally facilitates higher rates of early MBL, whereas a rough implant surface placed at the bone level reduces the amount bone loss. However, in long term, this crestal bone can be disturbed when the collar get exposed to oral cavity by any degree of inflammation. All these designs introduced to the implant collar may lead to a decreased amount of initial bone loss at the crestal level to prevent the break of the biological seal and consequentially loss of the implant. The question remains as to whether the surface structure on the collar of the implant exposed can be a genuine reason on the majority of implants failures rate. The objective of this presentation is to review a collar design that is available today that can create better biological seal and consequentially preserve the soft tissue health.
Radwa El-Dessouky
Tanta University Faculty of dentistry, Egypt
Title: To Seek a Longer Conservation Method of Tooth
Biography:
Radwa El-Dessouky has completed her MD from Tanta University, Egypt. She works as assistant lecturer at Fixed Prosthodontic Department; Faculty of Dentistry at the same university.
Abstract:
Perfect marginal seal is considered the first defense line of crowned tooth against caries, periodontal disease and hypersensitivity. It was an old concept that metallic margins achieve better adaptability than ceramics and hence metal-ceramic restorations were preferred by both dentists and patients in attempt to combine esthetics, strength and adaptability. All-ceramic crowns are popularly encouraged nowadays thanks to their excellent ability to mimic tooth structure in shade and translucency, biocompatibility and durability. Introduction of newer digital processing generations and ceramic sintering techniques together with the evolution of nano ceramics and resin ceramic hybrid materials are promising issues towards all-ceramic restoration with excellent margins. Additionally, certain details during tooth preparation and laboratorial adjustments were found to have a distinct effect on marginal fit of ceramic restorations. This article provides a brief overview about factors affecting marginal adaptation of ceramic restoration giving more focus on the effect of digital systems, nanoceramics and recent sintering techniques on ceramics marginal fit and longevity in the oral cavity.
- Track 9: Dental Implants Track 10: Treatment modalities Track 11: Dental Grafts Track 12: Dental Filling
Session Introduction
Doris Hissako Sumida
Sao Paulo State University, Brazil
Title: Maternal periodontal disease in rats impairs insulin signaling and decreases GLUT4 expression in adult offspring
Biography:
Doris Hissako Sumida is a dentist and has completed her PhD in Human Physiology from University of São Paulo and Post-doctoral studies from University of São Paulo. She has experience in physiology with emphasis in endocrinology and acting on the following subjects: food restriction, diabetes, GLUT4, insulin signal, periodontal disease, toxicity of fluoride, melatonin and bone metabolism. She has published more than 50 papers in reputed journals and has been serving as an editorial board member of reputed Journals.
Abstract:
The fetal programming hypothesis suggests that intrauterine stimuli or aggression can induce metabolic and physiology changes in offspring, increasing the diseases risk in adulthood. Cytokines such as TNF-a have been associated with reduced GLUT4 expression. This study aimed to evaluate GLUT4 content, mRNA expression of the GLUT4 and IRS-1, Akt serine phosphorylation status in the gastrocnemius skeletal muscle (GSM), glycemia, insulinemia, TNF-α levels and change in body weight in offspring of rats with periodontal disease. Female Wistar rats were distributed into a control group (CN) and an experimental periodontal disease group (PD), in which a ligature was placed around the mandibular first molars. Seven days after ligature placement, both groups were mated with normal male rats. The ligatures remained throughout pregnancy until weaning, after which the male offspring were distributed into groups: CN-o, control rat offspring; and PD-o, periodontal disease rat offspring. The body weight from 0 to 75 days of age was measured. At 75 days, the glycemia, insulinemia, TNF-α levels, Akt serine phosphorylation, mRNA expression of the GLUT4 and IRS-1, and GLUT4 content in the GSM were measured in the offspring. Maternal periodontal disease causes low birth weight, insulin resistance, reduction in the Akt serine phosphorylation status, and decrease in mRNA expression of the GLUT4 and increase in mRNA expression of IRS1 in GSM of adult offspring. These metabolic alterations observed in later life can be attributed to the effect of ‘‘programming’’ and reinforce the importance of preventing maternal periodontal disease, aiming to prevent insulin resistance in the adulthood of offspring.
William J Maloney
New York University, USA
Title: Considerations in the management and treatment of the Prosthodontic patient who is using illicit drugs
Biography:
William J Maloney, DDS is a full-time faculty member at New York University College of Dentistry. He is the author of numerous publications and has been awarded the American College of Prosthodontists Achievement Award.
Abstract:
A wide array of individuals present to the dental office for the prosthetic replacement of missing teeth. Patients with substance use disorders are sure to be among these individuals. The prosthodontic rehabilitation of these patients often requires certain modifications for treatment. These patients often exhibit various oral/dental presentations which are not routinely encountered in other patients. Methamphetamines are one such drug. Users of methamphetamines have been known to have the buccal smooth surfaces of their teeth and the interproximal surfaces of the anterior teeth ravaged by decay. These individuals also may exhibit clenching of teeth, xerostomia and temporomandibular disorders. Caution also needs to be taken when administering local anesthesia or nitrous oxide. Heroin users often exhibit an increase in dental caries as a result of craving for sweets, poor oral hygiene and anxiety regarding dental treatment. Heroin users often also exhibit an increase in periodontal disease and oral fungal and viral infections. Cocaine users often exhibit gingival lesions, bruxism, cervical wear, an increased rate of periodontal disease and an increased rate of tooth decay. It is also important to note that corrosion of gold dental restorations is also seen in these patients. Epinephrine-impregnated retraction cords are also contraindicated. The use of cannabis can also precipitate various oral conditions which can complicate the
prosthodontic treatment of the patient. These conditions include alveolar bone loss, gingival hyperplasia and xerostomia. Tachycardia is also associated with acute marijuana toxicity.
Sheila Pestana Passos
University of Alberta, Canada
Title: Performance of zirconium abutments from different implant designs in esthetic areas
Biography:
Sheila Pestana Passos received her MSc degree in 2007 and a PhD degree in 2010, both in Prosthodontics from Sao Paulo State University, Brazil. She completed a portion of her PhD at The Western University, ON, Canada. She completed her Post-doctoral studies from University of Alberta School of Dentistry in 2015. She is currently working as Assistant Professor at the Restorative Division at the University of Alberta. She has published 29 papers in peer-reviewed journals.
Abstract:
The advantages of zirconia implant abutments are enhanced esthetics with less gingival grey-blue discoloration than titanium abutments and enhanced biocompatibility. Dental zirconia (Y-TZP) is becoming the ceramic material of choice for implant abutments, especially in esthetic areas. Nevertheless, most of the data presented to date for zirconia abutments is for the standard platform implants. This lecture will focus on the esthetic parameters of zirconia abutments in implant dentistry. One of the studies that will be thoroughly discussed evaluated the standard and platform switching implant supported restorations as well as different implant designs. This investigation was conducted to assess complications, survival and success rates of zirconia abutments for implant-supported single crowns in esthetic zones. The peri-implant parameters were observed as well as mechanical complications, such as loss of retention and presence or absence of abutment fractures. The pros and cons of zirconia standard platform abutment designs compared to zirconia platform switching abutments will be presented in light of the current available knowledge.
Khaled Ekram,
Cairo University, Egypt
Title: Applications of digital dentistry in modern dentistry, from virtuality to reality
Biography:
Khaled Ekram has completed his DDS, BDS and PhD from Cairo University, Egypt. He is currently working as an Assistant Professor of Oral and Maxillofacial Radiology, Faculty of Oral and Dental Medicine, Cairo University. He is a senior consultant of Oral and Maxillofacial Radiology, member of European Association of Dento-Maxillofacial Radiology (EADMFR), member of International Association of Dento- Maxillofacial Radiology (IADMFR) and program instructor for continuous education courses, Faculty of Oral and Dental Medicine, Cairo University, Egypt (2010-2014).
Abstract:
Digital dentistry is now very widely accepted and is already in use in dental practice all over the world. This presentation will demonstrate how this innovation can provide the dentist with useful diagnostic information and additional traetment skills.This concept can integrate and combine a many different specialities together to produce a standardized computer generated surgicaland restorative dental solutions guides for the patients by allowing the operator and general practioners to apply the predetermined treatment plan for different surgical and prosthetic treatments that are difficult or even impossible to obtain by conventional methods. In this presentation, computer guided implant surgery will be discussed in detail from A to Z, starting from the CBCT scanning protocol till the drilling protocol and types of drilling systems. Also in this presentation the types of computer generated surgical stents used for orthognathic surgeries will be highlighted. Also planning for different types of prosthetic restorations can be planned in three-dimensional aspects and also excuted. In addition the translation of the digital smile design can be planned and physically achieved by the aid of many 3rd party softwares. Finally, other applications of digital dentistry will be mentioned briefly.