# Fracture load analysis of telescopic overdentures fabricated from PEEK and zirconia

## TL;DR

This study compares the strength and failure patterns of telescopic overdentures made from PEEK and zirconia materials.

## Contribution

The novel contribution is evaluating the fracture load resistance of PEEK and zirconia telescopic overdentures after thermocycling.

## Key findings

- Zirconia overdentures showed significantly higher fracture load resistance than PEEK overdentures.
- PEEK overdentures exhibited more favorable and repairable failure patterns compared to zirconia.

## Abstract

Edentulous patients often face challenges with denture retention and stability, making telescopic overdentures a preferred prosthetic
option. The choice of material critically affects the strength and longevity of these restorations. Therefore, it is of interest to
compare the fracture load resistance of telescopic overdentures fabricated with PEEK and zirconia copings after thermocycling. Zirconia
demonstrated significantly higher fracture load values (1298.4 ± 110.7 N) than PEEK (845.6 ± 92.3 N, p = 0.002), though PEEK showed more
favorable, repairable failure patterns. While zirconia provides superior fracture resistance, PEEK remains advantageous for its light
weight, flexibility and ease of repair, emphasizing the need for material selection based on clinical demands.