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Aim: To investigate the Microleakage of titanium implants with PEEK abutments, as well as their fracture resistance at 0 and 30-degree loads. Materials and methods: 20 titanium implants with titanium abutments were chosen as the control group (Group A) while 20 titanium implants with PEEK abutments were the test group (Group B). Each group was further subdivided into two subgroups; sub group 1A containing 10 titanium implants with titanium abutments at 0-degree load and sub group 2A at 30-degree load. Sub group 1B had 10 titanium implants with PEEK at 0-degree load and sub group 2B at 30-degree load. Fatigue testing for every group was conducted using Universal Testing Machine and microleakage was assessed using Nano CT. Results: Occlusal loading for 100000 cycles at 1 Hz frequency at 100 N did not cause failure of titanium or PEEK abutments at 0 degree, but it caused relevant vertical deformation in the PEEK abutment at 30 degree which is suggestive of failure of PEEK abutments. Conclusion: Within the occlusal load limit, there is absence of microleakage in both the Titanium and PEEK abutment samples. But when the occlusal load limits exceed the maximum load, the PEEK abutment fractures leading to microleakage whereas the Titanium abutments had higher fracture resistance compared to that of the PEEK. [ABSTRACT FROM AUTHOR]

Implants must be able to support masticatory loads combined with a high biocompatibility and wear resistance in the presence of a corrosive environment. In order to improve the simultaneous wear and corrosion response at the implant abutment interface, PEEK/titanium and titanium/titanium implants were assessed by tribocorrosion analyses under conditions mimicking the oral environment. The tribocorrosion tests samples were performed on a reciprocating ball-onplate tribometer at 30N normal load in artificial saliva at 370C. Open circuit potential (OCP) was measured before and after reciprocating sliding tests. The worn surfaces were characterized by stereomicroscopy. The results revealed a lower wear rate on PEEK combined with a lower coefficient of friction (COF), when compared to titanium. [ABSTRACT FROM AUTHOR]