Retention force of plastic clips on implant bars: a randomized controlled trial.

Objectives: Retention of overdentures is important for patients' satisfaction. The study tested whether the clinical performance of retentive clips made of poly-ether-ether-ketone (PEEK) is superior to those made of poly-oxy-methylene (POM).

Methods: A total of 30 patients received complete dentures with round bars (SFI-Bar) on two implants in a chairside technique.