31^st Euro Dentistry Congress June 20-21, 2022 Paris, France

Biography:

Abstract:

Objectives: to evaluate the effect of different ultrasonic scaling tips on surface roughness, color stability and bacterial accumulation of lithium disilicate ceramic. Methodology & Theoretical Orientation: Scaling procedure was carried out using ultrasonic scaler (Satalec, Acteon) with stainless steel tip (US), titanium tip (UT) and plastic tip (UP), on disc shaped lithium disilicate samples cemented into a cavity prepared onto the labial surface of freshly extracted bovine teeth (10 samples per group). The samples were stored in coffee solution in an incubator at 37°C for 12 days, equivalent to 1 year of coffee consumption. The surface roughness was measured before and after the scaling using a profilometer and atomic force microscopy. The color parameters were measured before and after scaling and staining procedures using spectrophotometer according to the CIE L*a*b* color order system. The samples were then incubated with Streptococcus mutans suspension. After incubation, the plates with 30 to 300 typical colonies were counted in a colony counter and mean values of colony forming units were obtained (CFU/mL). Findings: The titanium scaling tip showed a statistically significant higher mean values of change in surface roughness ΔRa and bacterial count than the plastic scaling tip. Color changes (ΔE) were not a statistically significant among the groups. The results showed a statistically significant positive (direct) correlation between surface roughness and color change (P= 0.012) and also between surface roughness and bacterial count (P=0.00). Conclusion & Significance: Within the limitations of this study, titanium scaling tips cause irreversible surface alterations of lithium disilcate ceramics which was in direct correlation to the color changes and bacterial accumulation. Recommendations are made that dentists should proceed with caution when scaling lithium disilicate surfaces. The findings of the current study may indicate the need for instruments that can remove plaque and calculus without causing surface damage

Biography:

Abstract:

Scaling is important for maintenance of gingival and periodontal conditions. These procedures have a harmful effect on the dental hard tissues. The aim of this study was to investigate the effects of hand and ultrasonic instruments made of stainless and titanium on the surface properties of enamel. Materials and Methods: Forty extracted premolars were used in this in vitro study and were randomly divided into four groups (n = 10).Group I received ultrasonic scaling with stainless steel tip, group II received ultrasonic scaling with titanium tip, group III hand scaling with stainless steel tip, and group IV hand scaling with titanium tip. Scanning electron microscopy (SEM) was used to examine the enamel surface morphology. Surface roughness of enamel was measured at baseline and after the scaling simulation using atomic force microscopy (AFM). Differences between initial and final measurements of surface roughness (ΔRa) were analyzed using two-way analysis of variance (ANOVA) followed by post hoc pairwise comparisons between groups. Results: SEM revealed deeper scratches and more destructive changes on enamel surface in group IV, whereas other groups revealed less change. AFM revealed that a mean surface roughness difference (ΔRa) had the highest value with hand instruments using titanium curettes, whereas the lowest difference was found with ultrasonic tips using stainless-steel tips. Hand titanium curettes showed a statistically significant increase in ΔRa when compared to hand stainless steel curettes (P = 0.02) and ultrasonic titanium tips (P = 0.01). Hand stainless steel tips showed a statistically significant increase in ΔRa when compared to ultrasonic stainless steel tips (P = 0.02) and hand titanium curettes (P = 0.02).

Conclusion: Scaling using ultrasonic stainless steel tips produce the least amount of surface roughness and damage to the tooth surface.

Biography:

Professor Dalia Ghalwash has her expertise in the field of Oral Medicine, Diagnosis and Periodonotology with special interest in the diagnosis and early detection of oral cancer and precancer. She has passion in improving oral health trying to reduce the mortality rate of oral cancer. She has years of experience in scientific research with many national and international publications in her field, in addition to a long teaching experience in huge educational institutions. She is currently the Head of Oral Medicine, Diagnosis and Periodonotology Department and the Chair of Research Ethics Committee of the Faculty of Dentistry, The British University in Egypt

Abstract:

Statement of the Problem: Oral cancer is considered the sixth most common cancer across the world, creating a significant global health burden. Despite the progress in preventive and therapeutic strategies, delay in oral cancer diagnosis remains a major cause of high morbidity and mortality. On the other hand, the survival rate increases up to 80% if an early diagnosis is achieved. Salivary biomarkers constitute major progress in diagnosis of oral cancer and is a rapidly developing arena of scientific research, it is also considered a promising prognostic and diagnostic tool in oral malignant and oral premalignant conditions. The purpose of this study is to report the most recent data on the diagnostic and prognostic value of salivary biomarkers in oral cancer and precancer. Methodology: A literature search was performed using the Cochrane library and PubMed databases from 1995 till present. Results: In the recent biological era “omics” method is a new biomarker detection tool that emphasis on exploring many molecules present in saliva. Presently, five main salivary diagnostic constituents are recognized; genomics, transcriptomics, proteomics, metabolomics, and microbiomics. Recent systematic reviews with high value of evidence have shown that salivary biomarkers analysis can be an excellent primary screening tool for the high-risk cases of oral cancer, and that combining these biomarkers with conventional tools could provide more potent diagnostic values for early detection of oral precancer and cancer. Conclusion & Significance: Combination of multiple biomarker candidates in prompt detection of oral precancer and cancer is preferred to improve accuracy, sensitivity, and reliability. This can bring salivaomics to clinical point-of-care applications. Clinical relevance: The use of salivary biomarkers is beneficial in screening of high-risk cases and is available for practitioners to apply into their clinical practice.

Biography:

Dr. Mohamed Shamel, associate professor of Oral Biology, has his expertise in studying different diseases affecting the oral cavity tissues. Corelating the research work with the clinical implications is a main focus in his studies. Research areas include stem cell and regenerative dentistry, preventive dentistry and salivary gland diseases.

Abstract:

Biography:

Dr. Hend has experience in Dentistry since her graduation from Faculty of Dentistry, Cairo University. She has her master degree in Restorative Dentistry from faculty of Dentistry, Cairo University. Her PHD is from faculty of Dentistry, Al-Azhar University in 2017. She is currently a lecturer in Conservative Dentistry Department in faculty of Dentistry, The British University in Egypt. She has both clinical and teaching experience throughout her career as a staff member in faculty of Dentistry. She teaches both preclinical and clinical programs for undergraduate and postgraduate dental students. She has been a module leader in her department. She has her expertise and passion in research related to her field. She has many publications related to restorative and conservative dentistry fields. Her publications are published and accepted in national and international journals. She has attended many scientific conferences and workshops nationally and internationally. She supervises research candidates in master program thesis.

Abstract:

Introduction about contact restoration with posterior composite restorations. Historical background about dental matrices. Definition of dental matrices. Different types of dental matrices used to properly restore the contact area. How to select the suitable matrix for each case?  What is sectional matrix system? And how to use it? The traditional matrices and composite. Contact restoration by composite, tips and tricks. The sectional matrix system is the best way to achieve a strong contact point in Class II restorations with composite resin. Different sectional matrix systems. Types of wedges used for composite restorations. The pre-wedging is an essential technique for proper contact restoration. Discussion of different cases of posterior composite restorations.

Biography:

Professor Of Conservative Dentistry – Cairo University and Head of Restorative Department – The British University in Egypt (BUE). He has wide experience and passion in improving dental health, research and education. He is speaker in many national and international dental and medical conferences. Also, he is key opinion leader for many dental companies regarding esthetic and restorative fields as DENTSPLY SIRONA, 3M ESPE and KAVO KERR. He supervised many master and PhD programs in his universities.

Abstract:

Introduction about bonding to tooth structures. Discussion about some of the new innovations in adhesives that are advancing the technology of composite resins. Total etch Vs Self etch adhesives. Technique sensitivity of different adhesive approaches. Post-operative hypersensitivity... is it composite related or adhesive related? What is the ideal adhesive & why? Ideal bonding protocol with enamel and dentin. Simple, reproducible technique to bond resin composite to different dental structures. Selective etch technique protocol (step by step). Bonding of indirect restorations.

Biography:

Dr Sara El-Shafei has her expertise and passion in research and in teaching prosthodontics. She has worked with students for a long time and strives to graduate new candidates who are as interested in research and implantology as she is. She is currently a Lecturer and  has taught prosthodontics at the British University in Egypt since 2013, before which she was also an assistant lecturer at other reputable educational institutions where she practiced her love of teaching. She obtained her Masters and PhD degrees in Prosthodontics from the Faculty of Dentistry, Ain Shams University in Egypt. Dr Sara has recently entered a new field of research which studies the utilization of human stem cells in relation to prosthodontics, and has several research projects underway that are as yet unpublished.  Alongside the educational and research parts of her career Dr Sara also practices clinical implant dentistry and is a consultant prosthodontist at Wadi El Nile hospital.

Abstract:

Statement of the problem: Completely edentulous patients have always faced a compromised style of life owing to their edentulism. The conventional treatment option; conventional complete denture construction may not always be satisfying to these patients, particularly in terms of retention and stability. Implant overdentures are a successful treatment option for these patients; however not all edentulous patients possess the suitable bone quantity and quality for osseointegrated implants and they might require complex preprosthetic surgical procedures to do so, like bone grafting, thereby increasing the complexity and morbidity of the treatment plan. Thus arose the need for an alternative and more conservative treatment option; mucosal inserts. Classified as an implant category, mucosal inserts have been used for a long time. Their use has declined for a few decades after the emergence of osseointegrated implants and their proven success, but they re-emerged again as a conservative treatment option with the recent release of a new type of inserts made of zirconium. The purpose of this study is to compare the effect of zirconium mucosal inserts versus that of endosteal osseointegrated implants on maxillary overdenture supporting structures, particularly maxillary bone. Methodology: Twelve male completely edentulous patients were selected for this study and divided into two groups of six. Group I received four osseointegrated implants retaining maxillary overdentures, while group II received maxillary overdentures retained by eight muchor zirconium mucosal inserts. Bone changes in both groups were measured and evaluated using cone beam ct at the time of insertion and after six and twelve months.

Results: : The results showed that the bone changes produced in mucosal overdenture wearers were greater than those produced in implant overdenture wearers.

Conclusion and significance : Zirconium mucosal inserts caused more bone changes than osseointegrated implants, making the latter a more advantageous treatment option when indicated.

Biography:

Dr. Alok Dwivedi has completed his MDS at the age of 28 years from Devi Ahilya Vishva Vidyalaya Indore (M.P.) India He is currently working as senior lecturer in Department of Prosthetic dental sciences, Faculty of Dentistry, Najran University, Saudi Arabia. He has Published 10 papers in reputed journals and has been serving as a reviewer in journals of repute. He has a vast experience in academics and clinical dentistry with a passion for research.

Abstract:

Purpose: In this study photoelastic stress analysis was used to compare the stress patterns around canine abutments using three different overdenture attachments.

Material and methods: Two teeth ie canines were used as abutments and were embedded in the photoelastic model made by clear photoelastic plastic resin CY 212(Araldite). Overdentures were fabricated using Ball-Socket, Tissue bar and short coping attachments. The layer of light bodied silicone rubber base impression material was used to simulate oral mucosa and load of 5 to 50 lb was applied. Stress fringes that generated were photographed and evaluated quantitatively.

Jaw Movement Simulator: The machine that was constructed to generate masticatory strokes was named ‘’jaw simulator’’. 150 masticatory strokes per minute were generated. It has an upper jaw in which upper denture was mounted with the cast. There is a centrally located rod in the upper jaw plate to hold the dead weights. The lower jaw plate held the photoelastic model.

Results: The highest amount of stress was generated by Ball-Socket and short coping transmitted least amount of stresses. There was gross difference in magnitude of stresses between two types of retainers.

Conclusion: There was more stress concentration around the abutments as the retentivity of the attachment increased.

Biography:

Prof. Fardos is working as a Vice Dean for Teaching and Learning, Faculty of Dentistry, The British University in Egypt, 2019-present.she is  a Program Director and Head of Prosthodontics Department at Faculty of Dentistry, British University in Egypt, 2012-present. Professor of Prosthodontics at Faculty of Dentistry, British University in Egypt, 2017-presentand also a  Professor of Prosthodontics at Faculty of Dentistry, British University in Egypt, 2012-2017. She completed Ph.D. Prosthodontics, Faculty of Dentistry, Ain Shams University 2007 and M.Sc. Prosthodontics, Crown and Bridge and Dental Materials, Faculty of Dentistry, Cairo University, 2000 and B.D.S, Oral and Dental Medicine, Faculty of Dentistry, Cairo University 1994.

Abstract:

Aim: This cross-sectional clinical trial with ten completely edentulous patients compares the retention of two groups of complete denture bases. Group A denture bases fabricated by final impression digital scanning and group B denture bases fabricated by master cast digital scanning. Methods: After taking primary impressions closed-mouth impression technique was done and scanned then the impressions were boxed, poured and the resulting master casts were scanned. From each group a denture base was fabricated by additive manufacturing technique and the retention of each denture base was evaluated intraorally by using digital force gauge. Results: The readings were recorded, tabulated and student’s t-test (unpaired) was used to identify the difference between the two scanning groups’ retention values. The significance level was set at P ≤ 0.05. The data revealed that impression scanning group had slightly higher values of retention than cast scanning group even though there was no statistically significant difference between the retention of the two scanning protocols. Conclusion: within the limitations of this study it was concluded that both extraoral digital scanning protocols has no effect on the degree of complete denture base retention.