Clinical and radiographic outcomes on supporting tissues of two implants retained complete mandibular overdenture with zircon- PEEK versus cobalt chromium -PEEK telescopic attachments

Document Type : Original Article

Authors

1 Department of Removable Prosthodontics Faculty of Dental Medicine, Boys, Cairo Al-Azhar University

2 Department of Removable Prosthodontics, Faculty of Dental Medicine, Cairo, Boys Al-Azhar University.

3 Lecturer, Department of Prosthodontics, Faculty of Dental Medicine, Boys , Cairo, Al-Azhar University

Abstract

Objectives: The aim of the present study was to evaluate outcomes on supporting tissues of two implants retained complete mandibular overdenture with zircon- PEEK versus cobalt chromium-PEEK telescopic attachments. subjects and methods: Twelve completely edentulous patients were randomly put into Group I: zirconia as a primary copings and PEEK as a secondary coping’s . Group II: cobalt chromium as a primary copings and PEEK as a secondary coping’s . peri-implant bone level changes around implant and modified gingival index. Results: In cobalt and zircon group, There was a statistically significant increase in bone loss at mesial and distal surfaces of right and left implants (p ≤ 0.05). In the right side, T0: Immediate: T6: 6th month and T12: 12th month: There was a statistically significant difference between the two studied groups according to Bone loss at mesial and distal surfaces (p ≤ 0.05). The Zircon group showed a lower bone loss than cobalt group. In the left side, T6: The Zircon group showed a lower bone loss than cobalt group. T12: There was a statistically significant difference between the two studied groups according to Bone loss at mesial and distal surfaces (p ≤ 0.05). The Zircon group showed a lower bone loss than cobalt group. There was a statistically significant difference in Gingival index at surfaces of right and left implants (p ≤ 0.05). Conclusion: Implant overdentures can be retained by zirconia-PEEK telescopic attachments, which can reduce the stress on the implants by using the stress-breaking ability of PEEK.

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Al-Azhar Journal of Dental Science
Volume 28, Issue 3 - Serial Number 3
July - Restorative Dentistry Issue (Removable Prosthodontics, Fixed Prosthodontics, Endodontics, Dental Biomaterials, Operative Dentistry)
July 2025
Pages 403-412

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