Document Type : Consort randomized clinical trials (RCT)
Authors
1
Prosthodontics Department,Faculty of Dentistry,Mansoura University,Egypt.
2
Pediatric and Dental public health Department, Faculty of Dentistry,Mansoura University,Egypt.
3
* Professor of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt. **Professor, Removable Prosthodontics, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia.
10.21608/asdj.2025.355199.1814
Abstract
Aim: This study assessed the impact of different materials; CAD/CAM- milled poly-ether-etherketone (PEEK), poly-methyl-methacrylate (PMMA), and conventional PMMA for mandibular implant-assisted overdenture bases on peri-implant soft tissue health.
Materials and Methods: 30 completely edentulous participants were enrolled in this randomized clinical study. They received mandibular implant-assisted overdentures, each constructed using one of 3 denture-base materials, opposing a single-maxillary denture. They were randomly allocated to one of 3 groups as follows: CAD/CAM-milled PEEK, CAD/CAM- milled PMMA, and conventional PMMA. Peri-implant tissue health was evaluated immediately after insertion, at 1, 3, 6, and 12 months later.
Results: Peri-implant parameters showed a significant increase over time across all groups (P<0.001), except for calculus formation in CAD/CAM-milled PEEK and PMMA groups (P=1.00).Significant differences were noticed among the 3 groups in bleeding scores and plaque index at 3, 6, and 12 months (P <0 .000). Significant differences in pocket depth revealed among groups at 1 and 3 months (P =0.001), and at 6 and 12 months (P <0 .000) in favor of CAD/CAM-milled PEEK group. Respecting calculus, non-significant difference showed among groups after 1 and 3 months. However, it was observed after 6 and 12 months (P< 0.000).Calculus score displayed non-significant difference with time in all groups (P=1.00) except for conventional PMMA (P< 0.000).
Conclusion: Within the limitations of this study, both CAD/CAM- milled PEEK and PMMA were advantageous as implant-assisted overdenture bases over conventional PMMA regarding peri-implant soft tissue health. However, CAD/CAM- milled PEEK provided better outcomes respecting bleeding, plaque and pocket depth indices.
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