![]() ![]() Synthesis and properties of novel copolymers of poly(ether ketone diphenyl ketone ether ketone ketone) and poly(ether amide ether amide ether ketone ketone). Polymeric materials and films in dentistry: An overview. Advances in polymeric materials for dental applications. Springer: Cham, Switzerland, 2021 Volume 58, pp. In Metal, Metal Oxides and Metal Sulphides for Biomedical Applications Rajendran, S., Naushad, M., Durgalakshmi, D., Lichtfouse, E., Eds. Modification of titanium alloys for dental applications. Titanium allergy in dental implant patients: A clinical study on 1500 consecutive patients. Removal torque evaluation of three different abutment screws for single implant restorations after mechanical cyclic loading. Comparative study between an immediate loading protocol using the digital workflow and a conventional protocol for dental implant treatment: A randomized clinical trial. Effect of the location of dental mini-implants on strain distribution under mandibular kennedy class 1 implant-retained removable partial dentures. Management of obstructive sleep apnea with implant retained mandibular advancement device. The PEEK screw could be removed more easily in case of abutment screw fracture. The maximum tensile strength of the Ti screws amounted to 1196.29 MPa. They found that the maximum tensile strength was 76.08 MPa for 20% TiO 2 powder, 152.67 MPa for 15% short carbon fibers, 157.29 MPa for 40% short carbon fibers, and 191.69 MPa for 15% continuous carbon fibers. Controls included Ti6Al4V abutments screws. conducted a study on PEEK screw-in screw-retained implant prostheses, in which they used four PEEK-modified abutments: two screw types with 15% short carbon fibers and 40% short carbon, and another two screw types with 20% TiO 2 powder and >50% continuous parallel carbon fibers. compared the fracture resistance of Ti, PEEK, and PEEK reinforced with 30% carbon fiber abutment screws, and they found that the Ti screws had higher fracture resistance than screws with PEEK and PEEK reinforced with 30% carbon fiber but no difference between screws with PEEK and PEEK reinforced with 30% carbon fiber. ![]() Furthermore, PEEK veneered onto Ti structures can also enhance the stress distribution, especially at the interface between the implant and bone. Hence, the strength and stiffness of PEEK composites can be enhanced by adding more carbon fiber networks. Increasing short carbon fibers (CFs) up to 60% results in higher stress distribution through abutment and implants toward the bone. ![]() It has been found that addition of 30–50% carbon fibers does not affect the stress compared with unfilled PEEK, but >50% carbon fibers show higher elastic modulus and strength than those of the PEEK composites with lower percentage of carbon fibers. The unfilled PEEK has low elastic modulus and strength. Figure 1 shows the surfaces of a 3D-printed PEEK and PEEK matrix composite. In addition, the stress distribution in implant and abutment can be improved by composing the PEEK and its fiber-reinforced composites. In screw-retained implant prostheses, a PEEK abutment screw has an advantage over a metal screw due to similar elastic properties. ![]()
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