Effect of Two Different Treatment Modalities on Prei-implant Bone Height of Implant Supported Mandibular Overdenture

Abstract

Aim: This study was carried out to evaluate radiographically the effect of different treatment modalities (All on 4 Concept or 4 implant in interforaminal region) on prei-implant bone height changes of implant supported mandibular overdenture using CBCT. Material and methods: Fourteen completely edentulous patients were selected according to the inclusion and exclusion criteria and divided randomly into 2 groups. Group 1: seven completely edentulous patients were rehabilitated with upper complete denture and lower implant supported hybrid prosthesis using All on 4 concept and group 2 seven completely edentulous patients were rehabilitated with upper complete denture and lower implant supported hybrid prosthesis using four straight implants in anterior intra foraminal region. Bone height changes were evaluated at 0, 6, 12 months after insertion of prosthesis. All data was collected, tabulated & statistically analyzed. Results: The results of this study showed more marginal bone loss around tilted implants in All on 4 concept than straight posterior implants in the second group. Conclusion: Tilted posterior implants in All on 4 concept induce more bone resorption than straight posterior one.