Comparative evaluation of Microstrain distribution in peek v s titanium implant supported hybrid denture frameworks an in vitro study

Abstract

newline newlineBACKGROUND : Hybrid denture represented one of the unique aspects in the newlinereconstruction of the edentulous arches as the implants are placed only in the newlineanterior region and the prosthesis is given in the posterior region with the newlinesupport of a cantilevered bar/framework. Conventionally the framework for such newlinea prosthesis is fabricated using titanium or cobalt-chromium metal. However the newlineneed for a metal free prosthesis has led to the use of alternatives such as newlinezirconia as framework material. Polyether ether ketone (PEEK) has evolved into a newlinesuitable metal free framework material with its lightweight, polishability and newlineelastic modulus similar to bone. Hence this study aims to assess the microstrain newlinedistribution of PEEK and Titanium as framework material for implant supported newlinehybrid dentures. newlineAIM: newlineTo compare the microstrain experienced on PEEK and titanium implant newlinesupported hybrid denture frameworks and its distribution in the peri implant area newlineunder various static loading conditions newlineMATERIAL AND METHODS : This in-vitro study consisted of two groups, newlineGroup 1 consisting of PEEK frameworks (n=7) and Group 2- Titanium newlineframeworks (n=7). These frameworks were attached onto 4 dummy implants newline(4.3x10mm) , and the development of microstrain within the framework and in newlinethe peri implant area was assessed under various loading conditions. newline(50N,150N,350N). The microstrain values were recorded in micro epsilon (and#956;e), newlineand the obtained values were tabulated. Statistical analysis was done using newline10 newlineSPSS software. Independent T-test was done to compare the microstrain newlineformation within the frameworks and Paired T-test was used to assess the newlinemicrostrain in the peri implant area. newlineRESULTS : There was a significant difference in the microstrain development newlinewithin the frameworks under various loading conditions, with PEEK frameworks newlineshowing more microstrain development than titanium. In the Peri-implant area, newlineboth the groups did not show any significant difference in the microstrain newlinedevelopment.