Also in the field of dentistry, where traditionally a wide range of alloplastic materials is used, the application of PEEK increases replacing those conventional dental materials. Due to its elastic modulus, similarly to that of cortical bone, it plays an important role as viable alternative to conventional implant materials such as titanium in the field of orthopedics and traumatology. Since April 1998, PEEK has also been commercially offered as implant material for long-term implantation (Invibio, Ltd., Thornton-Cleveleys, United Kingdom). PEEK (poly-ether-ether-ketone) is well known as a high-performance thermoplastic polymer able to replace metallic components. ![]() This underlines the applicability of PEEK in dentistry and points out the possibility to offer patients metal free restorations, especially in the presence of allergies and/or bruxism. SignificanceĪll tested specimens showed higher values than the prevailing minimum strength for plastic materials and their application in dentistry of 65 MPa (DIN EN ISO 10477). Accordingly the bending strengths of these two material types ranged from 170.37 ± 19.31 MPa to 1009.63 ± 107.33 MPa. The results regarding the bending moduli ranged from 2.73 ± 0.26 GPa for an unfilled brand to 47.27 ± 10.3 GPa for a carbon fiber reinforced PEEK with unidirectional continuous carbon fibers. Braun Melsungen AG, Melsungen, Deutschland) for one day, 7 days, 28 days und 84 days on the other hand and the material parameters bending modulus and bending strength were evaluated. Methodsġ50 specimens of 11 different PEEK-compounds were tested via a three-point bending test using a universal testing machine (Z010, Zwick GmbH & Co, Ulm, Germany) after dry storage on the one hand and after incubation at 37 ☌ in Ringer solution (Fa. Therefore the mechanical properties of different PEEK-compounds should be eavuated vie the three-point bending test. ![]() These iso-elastic characteristics of PEEK lead to the assumption, that it could represent a viable alternative to conventional materials also in the field of dentistry. The high-performance thermoplastic polymer PEEK (poly-ether-ether-ketone) is used as alternative implant material to metals since 1998 in many medical fields due to its bone-like mechanical properties. The lowest results were evaluated for an unfilled brand.Ī PEEK compound reinforced by continuous carbon fibers showed the highest results. The required minimum bending strength for dental plastics of 65 MPa was exceeded. The results of the bending strengths and bending moduli were measured. Eleven PEEK compounds were evaluated by three-point bending tests.
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