11/11/2023 0 Comments Peek material in dentistry![]() ![]() ![]() Because of its color and other physical properties, PEEK permits RPD fabrication with esthetic clasps and occlusal rests with better occlusal stability 11.Īlthough the supreme physical and chemical properties of PEEK were clearly demonstrated in the literature, to serve the practical purpose of designing better dental structure, compatibility between the material and specific RPD frameworks is always a non-trivial topic that requires careful discussion. Recently, PEEK has been used for the implant supported bridge and claps of RPDs 7, 8, 9, 10, and only one published study focused on the design of integrated RPD with the material 11. All these features of PEEK could be considerably attractive for clinicians who seek improvements over conventional dental materials 7. The anti-allergic property, polishability, low plaque affinity, and wear resistance of the nonmetal materials can be improved by using polyetheretherketone (PEEK), which is a semi-crystalline organic polymer with stable chemical properties, high biocompatibility, high temperature resistance, and easy mechanical processing properties 3, 6. The dental profession always thrives for better materials which can fulfill the pitfalls of the existing materials. Nonmetal denture framework materials includes a large body of organic polymers accompanied by a wide spectrum of physical and chemical properties. ![]() However, several severe problems of CoCr alloy, such as aesthetic problems and metallic in taste, were pointed out in several researches 3, 4, 5, and these problems are likely applicable to other metal materials. Cobalt-chromium (CoCr) alloy is one of the most common metal RPD framework material. Conventional RPD framework materials could be roughly categorized into metals and non-metals. Removable partial dentures (RPDs) have wide indications and flexible designs compared to fixed partial dentures or implant restorations 1, 2, and they are frequently used to restore dentition defects during the clinical work of prosthesis. However, the maximum displacement of the free-end under masticatory force is not conducive for denture stability, along with large stress on the mucosa indicate that PEEK is unsuitable for patients with more loss of posterior teeth with free-end edentulism. Results suggested that PEEK framework has a good protective effect on PDL, suggesting applications for patients with poor periodontal conditions. Among three materials tested, PEEK has the lowest maximum von Mises stress (VMS) on periodontal ligament (PDL), the greatest maximum VMS on mucosa, the maximum displacement on free-end of framework, and the lowest maximum VMS on framework. Four RPDs were designed by 3Shape dental system, and the models were processed by three-dimensional finite element analysis. A patient’s intraoral data were obtained via CBCT and master model scan. The questions whether the PEEK framework has similar stress distribution on oral tissue and displacement under masticatory forces as titanium alloy (Ti-6Al-4V) or cobalt-chromium alloy (CoCr) remain unclear and worth exploring. Polyetheretherketone (PEEK) is a new material used for the frameworks of removable partial dentures (RPD). ![]()
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