Novel PEEK Retentive Elements versus Conventional Retentive Elements in Mandibular Overdentures: A Randomized...

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Prosthodontics

Background:

• Conventional mandibular overdentures often suffer from reduced retention due to clip wear over time.
• Polyether ether ketone (PEEK), manufactured using computer-aided design-computer-aided manufacturing (CAD-CAM), presents a potential solution for durable retentive components.
• Improving the retention of implant-supported overdentures is crucial for patient comfort and function.

Purpose of the Study:

• To compare the retention force and patient satisfaction of implant-supported mandibular overdentures using PEEK clips versus conventional nylon clips.
• To evaluate the long-term performance of PEEK retentive elements in implant overdentures.

Main Methods:

• A comparative study involving 22 participants, divided into conventional (nylon/metal) and PEEK groups (n=11 each).
• Retention force was measured using a force meter, and patient satisfaction was assessed using a 7-point visual analog scale (VAS).
• Measurements were taken at baseline and at 3, 6, and 12 months post-insertion.

Main Results:

• The PEEK group demonstrated statistically significant higher retention force at all measurement points (insertion, 3, 6, 12 months).
• While the conventional group initially reported higher satisfaction, the PEEK group showed statistically significant higher satisfaction at 6 and 12 months.
• No significant difference in patient satisfaction was observed at the 3-month follow-up.

Conclusions:

• CAD-CAM fabricated PEEK retentive materials provide superior retention for implant-supported mandibular overdentures compared to conventional materials.
• PEEK offers improved long-term patient satisfaction by maintaining retention more effectively.
• The findings support the use of PEEK in overdenture retentive components for enhanced clinical outcomes.