Waleed El-Beialy received his B.D.S. from Cairo University ranking 2nd on all Egyptian Universities that year, grading Excellent with honors. He attained his M.D.S. and D.D.S. from Cairo Univerity. In 2003 he moved to Japan, achieved a second D.D.S. and Ph.D. from Hokkaido University. He is currently an Associate Professor of OMFS at both Cairo Univerity and Future University in Egypt (FUE). Minor specialities are TMJ and Orthognathics. Arthroscopy is my greatest interest that I achieve a lot with.
Temporomandibular joint (TMJ) and its pathosis has been a hotspot for oral and maxillofacial surgery (OMFS). Replacing a TMJ is not the modality of choice for treating a number of temporomandibular disorders (TMD), however, it is sought to be the final resort. While ankylosis seems to be the most common necessity for a TMJ replacement, it also generally affects the younger population and ideally augmented by autogenous bone grafts, namely the costochondral grafts that cause the least facial deformity in such growing patients. On the other hand, ankylosis in the adult population; patients suffering multiple failed TMJ surgeries for example following attempts to surgically treat internal derangements (failing menisectomies); as well as those suffering advanced rheumatoid arthritis, are all possible candidates for TMJ prosthesis. In this study the first hands-on Egyptian made TMJ prosthesis will be presented.
Elif Sepeti worked as Professor, June 2004- present Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul. • Associate Professor, October 1998. Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul. • Ph-D, January 1994. Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul. Thesis: To investigate the success of glass ionomer cements in Class II restorations of primary molars: an in-vivo and in- vitro study. Advisor:Prof. Zeynep Aytepe • Research Assistant, January 1991. Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul. • Post graduate student, September 1988. Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul. • DDS, June 1988. Faculty of Dentistry, Istanbul University, Istanbul.
High fluoride releasing restorative materials generally have lower mechanical properties. Therefore they are preferred in primary teeth and non-stress bearing cavities in permanent teeth. Aim:The aim of this study was to evaluate the mechanical properties of compomer restorative materials modified with bioactive glass (BAG) and hydroxyapatite (HA) particles . Material and methods:1%, 2%, 3% and 4% w/w HA and BAG particles were added mechanically to the compomers.The specimens were prepared for measurement of compressive strength, flexural strength and fracture toughness. The specimens were assigned to 9 experimental groups. SEM was utilized to study surfaces of the specimens in the fracture toughness test. The statistical analyses were performed by Oneway Anova, Tukey HDS and paired sample t tests. Results: Compressive strength and flexural strength of control group was significantly higher than other groups, except 4% HA added compomers (p<0.01). It was found that BAG particles decreased the compressive strength of compomers. The addition of 1% HA and 4% BAG resulted in a decrease of the elastic modulus. The addition of 3% HA, 3% and 4% BAG significantly increased the fracture toughness of the material (p<0.05,p<0.01). SEM images of the experimental compomers showed a heterogeneous surface. Nano-HA particles were not distributed homogeneously in the matrix and some agglomeration occurred. BAG and HA modified specimens showed rough surface texture. In conclusion, the results of the study demonstrated that the addition of BAG and HA into compomers could affect the mechanical properties of the material depending on the amount of additive. Key Words: bioactive glass, hydroxyapatite, compomer, mechanical properties