임플란트는 치아가 상실된 환자에 있어 예측가능하고 안정적인 치료법으로, 술식이 발전하면서 술자와 환자 모두 더 빠르고 편한 치료법을 원하게 되었다1,2). 이에 임플란트의 식립 후 즉시 하중을 가하는 immediate loading 술식이 보편화되고 있다. 이러한 임플 란트의 술식을 시행하기 위해서는 primary stability 값이 충분히 높아야 하고, 이는 immediate loading 판단하는 가장 중요한 인자 이다3,4). 임플란트의 안정도에는 환자, 임플란트와 관련된 요소가 영 향을 준다5,6). Alsaadi 등7)은 해면골 대비 피질골의 비율이 증가할 수록 임플란트의 성공률이 증가한다 하였고, Pikner 등8)은 해면골 의 골질이 soft할수록 임플란트의 성공률이 감소한다고 하였다.
Purpose: The purpose of study was to analyze the influence on the implant design, density of cancellous bone and thickness of cortical bone to the implant primary stability. Materials and Methods: A total of 144 implants (4.0×10 mm) were installed in 24 artificial bones. Implants were divided into 3 groups. Artificial bones were divided into 4 groups. Results: There was statistical significance among ITV, ISQ, PTV (p＜0.05). Element that effects to primary stability, D3 bone has been above D4 bone. Primary stability has been influenced according to existence of cortical bone and has shown a great level as cortical bone is 2 mm. The B implant has shown the highest primary stability level among the three types of Implants: macro thread ＞ double micro, macro and micro thread ＞ macro and micro thread. The degrees of the factors affecting primary stability: implant fixture＞ cortical bone＞cancellous bone type. Conclusions: There has been a close correlation among the results of three stability measuring devices (ITV, ISQ, PTV). The fixture types of Implant have been the biggest influences to primary stability among all the factors. (JOURNAL OF DENTAL IMPLANT RESEARCH 2013;32(1):11-16)
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