2022 Volume 35 Issue 4 Pages 308-313
Implants for intermediate defects are an effective prosthetic treatment for defects. In order to perform highly reliable prosthetic treatment, it is important to understand the causes of the defect. Zirconia, which is often used for occlusal recovery, has excellent mechanical strength, and its range of application has expanded in recent years. Unlike conventional occlusal surface materials, there is less concern about chipping and wear with zirconia, but more concern about the effects of stress transfer during occlusion on the implant body and periodontium. We report a case where a thermoplastic resin material was clinically applied as an abutment to provide a buffering function.
In this case, a polyetherketoneketone (PEKK) material abutment and zirconia crown were fixed together to form a superstructure that helped alleviate the occlusal pressure from the defect, which could have led to root fracture and ultimately tooth extraction. The occlusal force applied to the zirconia crown and the stress on the adjacent tooth were matched ; the prosthetic treatment was successfully performed without any treatment intervention for the remaining tooth. As a result, a balanced occlusal contact state was obtained, and high patient satisfaction and a good long-term prognosis were achieved.
