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Aim:- To evaluate and compare the effect of thread geometry i.e. V-shape, Square and Buttress under 100 N force on peri-implant bone via Finite Element. Materials & Method:- Three virtual models was prepared having implants with different thread designs:- V– thread design Model I; Square thread design Model II and Buttress thread design Model III. Loading points were marked on the superstructure (crowns virtually fabricated for each of the abutments) and 100N of vertical and oblique forces at an angle of 45º were applied. ANSYS software was used for qualitative and quantitative stress analysis. Maximum von Mises stresses and strain values at the implant surface and abutment were recorded. Results:- Highest displacement was seen in square shaped thread designed implants (0.46) followed by buttress shaped and then V-shaped thread design of implants (0.056). The mean stress for V-shaped design implants, square shaped design implants and buttress design implants were 6.12, 6.18 and 6.11 respectively. Highest difference in stress on abutment was 33.84, 32.59 and 20.53 in V shaped, square shaped and buttress shaped designs respectively. Conclusion:- Square shape thread design has biomechanical advantages in terms of reducing stress concentration and microstrain in bone.

Edentulism is a debilitating and irreversible condition and is described as final marker of disease burden for oral health. Rehabilitating edentulous patients with residual ridge resorption has improved tremendously because of Implant dentistry . Aims and Objectives: To evaluate the crestal bone loss in mandibular implant over denture via locator and ballsocket attachments: An In - Vivo study. Material and method: This study was undertaken in the Department of Prosthodontics and Crown &Bridge Methodology • According to the inclusion and exclusion criteria, twenty subjects were selected for this study. OPG radiographs were recorded for each subject. They were divided into two groups: Group A and Group B. • Group A subjects (10) received ball and socket retained mandibular implant overdenture against a maxillary complete denture with ball diameter of 2.25mm and gingival height of 3mm while Group B subjects (10) received locator retained mandibular implant overdenture. Results The result obtained was subject to comparison by ANOVA statistical analysis. It was found that for ball and socket attachment, highest crestal bone was observed on the mesial aspect of the right implant followed by the distal aspect of the same implant.

An ideal maxillofacial prosthetic material must have excellent tissue receptivity.Fabrication of maxillofacial prostheses presents various problems, such as obtaining impressions, mold construction, coloration and characterization to resemble human skin, also, the range of mechanical properties and degree of permanence desired in materials poses a challenge. Prosthetic materials should be translucent, color stable with a tendency to stain, easy to clean and be flexible conjunct to the skin which it adheres to. In addition, it must be able to adhere securely and comfortably and exhibit a fine line marginal contact.In this article the authors have tried to explain in detail about all maxillofacial prosthetic materials that have been used and are being used, with a note on the most recent 3D printing technology being researched currently for facial prostheses.

The study of implantology has evolved since its introduction into dentistry. Apart from other aspects of an implant, osseointegration has been of prime interest to researchers and practitioners. The study of osseointegration alone has lead to many discoveries regarding the implant’s macro and micro design and has been used very advantageously so far. Although peri-implant healing has already been studied in depth, there is little information on the genetic influence on peri-implant bone healing. The purpose of this review is to analyze and sequence the events of peri-implant healing and to identify all the genes and their processes that lead to successful peri-implant healing.