Flexural strength of PEEK vs PMMA in immediate-load hybrid prostheses

Abstract

Constant innovation in biomaterials seeks prosthetic solutions that optimally combine functionality, aesthetics, and high flexural strength for immediate-load implant-supported rehabilitations. Polymethyl Methacrylate (PMMA) is the traditional and economical polymer, but its mechanical limitations render it vulnerable to fracture under the significant masticatory forces inherent in hybrid prostheses. Polyether Ether Ketone (PEEK), a high-performance polymer proposed as a metal substitute, offers an alternative with superior stability and durability. The justification for this systematic review lies in the critical need to prevent mechanical failures, providing an up-to-date synthesis of scientific evidence to guide informed clinical decision-making. The Objective is strictly to compare the flexural strength of PEEK and PMMA within the specific context of immediate-load hybrid prostheses. The Methodology implemented is a rigorous systematic review, following the P.I.C.O. guidelines and the PRISMA method. The search will concentrate on articles published over the last 10 years, utilizing key databases such as PubMed and ScienceDirect, with a selection based on predefined inclusion and exclusion criteria. As Expected Results, it is anticipated that PEEK will demonstrate superior flexural strength compared to PMMA, which should translate directly into a lower incidence of prosthetic fractures and greater long-term clinical reliability of the rehabilitation.