Comparable retentive clasp design of Removable partial denture made of PEEK or Co-Cr alloy; A Finite Element Analysis Study

<ns3:p>Background Recent advances in computer-aided design and computer-aided manufacturing (CAD/CAM) have ushered in a new era of restorative dentistry, facilitating the utilization of innovative materials such as polyether ether ketone (PEEK) in lieu of conventional metal alloys for removable partial dentures (RPDs). Methods This study aimed to scrutinize the retentive efficacy of RPD clasps fabricated from PEEK and cobalt-chromium (Co-Cr) alloy through Finite Element Analysis (FEA). Employing in vitro experimentation on Maxillary Kennedy Class I cases, two distinct experimental models were devised, each representing varying degrees of retentive undercuts to simulate diverse clinical scenarios. Employing the Rest Proximal Aker (RPA) clasp design for both materials, this investigation integrates a comprehensive consideration of material properties, FEA modelling, and meticulous data analysis to evaluate the mechanical performance of PEEK clasps within a simulated oral environment. These models were systematically refined using optimization algorithms to enhance the design of PEEK clasps. Results Extensive stress analysis, strain distribution mapping, and deformation profiling were performed under diverse loading conditions. The FEA outcomes reveal that both PEEK and Co-Cr alloys are suitable as materials for RPD clasps, each presenting distinct advantages; however, PEEK demonstrates a more promising prospect as a superior alternative to the Co-Cr alloy. Conclusions Material selection should be tailored to individual patient-specific considerations and clinician expertise. The analysis of the stress distribution, strain patterns, and deformation tendencies aids in pinpointing potential weak areas or failure zones, thereby guiding future design enhancements and clinical applications.</ns3:p>