نبذة مختصرة : 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.
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