Authors: Radwa M.K. Emera, Osama M. Askar, Wael S. Ahmed, Somaya M. Eskander
Aim: Evaluation of peri-implant vertical and horizontal bone changes of two implants retained mandibular complete overdenture with Zirconia-PEEK telescopic attachment.
Material and Method: Six completely edentulous male patients with average age of 60 years were selected for this study. Each patient received two implants in the mandibular canine regions. Maxillary conventional complete dentures were constructed against implant retained mandibular overdentures for all patients. Zirconia- PEEK telescopic attachments were fabricated to retain the overdentures where primary telescopic crowns were constructed of zirconia and secondary ones were constructed of PEEK. Peri-implant vertical bone loss (VBL) and horizontal bone loss (HBL) were evaluated using standardized digital periapical radiographs at time of overdenture insertion (T0), after 6months (T6) and 12 months (T12) of overdenture use.
Results: Significant difference was observed between (T0 and T6), (T6 and T12) and (T0 and T12) for peri-implant vertical bone level in both mesial and distal implant surfaces. However, no significant difference was observed for horizontal bone level except between (T0 and T6) for both implant surfaces. Median values of peri-implant VBL ranged between 0.10mm and 0.35mm, while the comparison of VBL between different observation periods of the study revealed significant difference for both implant surfaces. Regarding HBL, insignificant difference was detected, except between (T6-T12) and (T0-T12) for the distal implant surface.
Conclusion: With respect to this study limitations, including the small sample size and the short term follow up, It could be concluded that:
Although the siginificant change in peri-implant bone level associated with two implants retained mandibular overdenture with zirconia-PEEK telescopic attachment, the obtained bone loss was below the normal documented range for successful implants.