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Article Type

Original Article

Section/Category

Restorative Dentistry

Abstract

Objective: Clinical and Radiographic evaluation of bar-retained mandibular overdenture retained by four single-piece compressive implants regarding bone loss and implant stability.

Materials and methods: Fifteen completely edentulous patients with mandibular knife edge ridge anteriorly were chosen, for all patients, compressive implants were installed in the inter-foramina areas and immediately loaded with mandibular complete overdenture housing three peek clips and retained by Co-Cr bar, implant stability was measured using periotest at insertion day T0, 3and 6 months after insertion (T3, T6), Vertical bone height changes around supporting dental implants were evaluated using CBCT x-ray at insertion day (T0), 6 and 12 months after insertion (T6, T12). The analysis of implant stability scores was made by Friedman test followed by Wilcoxon signed ranks test to compare between two times in the same group, and for bone loss Paired samples t-test was used, P-values

Results: for both anterior and posterior implants, no significant difference in implant stability was noted between observation times. For vertical bone height changes, it was significantly increased from T3 to T6 for anterior (P=.046) and posterior (P=.007) implants. There was no significant difference in implant stability and bone loss between implant positions (anterior and posterior implants) at different observation time.

Conclusions: within the limitation of this study including patient number and evaluation time, immediate loading of four compressive implants installed in the mandibular inter-foramina area by bar retained mandibular overdenture could be considered a promising immediate loading rehabilitation concept.

Keywords

Compressive implants, milled bar, peek clips, marginal bone loss, implant stability

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