무치악부위에서 dental implant를 이용한 수복은 환 자에게 기능적, 심미적인 측면에서 만족할 만한 결과 를 주며 표면처리된 implant가 소개된 이후 임상적인 성공률은 90~95%까지 보이고 있다. 그럼에도 불구 하고 계속적인 합병증이 보고되는데 실패 원인 중 fixture fracture는 자주 발생하지는 않지만, 환자와 치과의사 모두에게 치명적이다.
Dental implant restoration satisfies edentulous patient in both fuctional and esthetic matters. Clinical success rate of implant restoration has gone up to 90~95% since the surface modification of implant body has been performed. But still lots of failure on implant restoration has been reported. Among these failures implant body fracture maybe fatal to both patient and dentist. Balshi et al. reported 8 case of implant body fracture in 4045 implant restorated cases. Mayo clinic study also reported 3 cases of implant body fracture in 1778 implant restorated cases. Jemt and Lekholm reported single implant body fracture in 259 implant restorated cases but Zarb and Schmitt had no implant body fracture failure on their study. These following factors could be considerable in dental implant body fracture. 1.design or production flaws 2.non-passive fit of the superstructure 3.occlusal force(load factor) 4.parafunctional force(Bruxism,clenching) 5.design of the superstructure 6.implant location 7.implant size 8.metal fatigue 9.bone resorption around the implant
Ⅰ. I ntroduction Ⅱ. case Ⅲ. Discussion Ⅳ. summary REFERENCES
