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Studies of Osseointegrated Implant-models on stress distribution 치과용 골 유착성 임플랜트 고정체 형상의 응력 분산에 관한 연구
Chong-Hyun Han, Hung-Jae Chun. Sin-Young Jung, Seong-Joo Heo, Yong-Chang Choi, Chong-Pyung Chung, Young Ku, In-Chul Ryu, Myung-Ho Kim
한종현, 전흥재, 정신영, 허성주, 최용창, 정종평, 구영, 류인철, 김명호

Finite element analyses were performed to study effects on stress distribution generated in jaw
bone for various shapes of dental implants: plateau type, plateau with small radius of curvature,
triangular thread screw type in accordance with ISO regulations and square thread screw filleted
with small radius partially. It was found that square thread screw filleted with small radius was
more effective on stress distribution than other dental implants used in analyses. Additional analy-
ses were performed on the implant with square thread screw filleted with small radius for very-
ing  design  parameters,  such  as  the width  of  thread  end,  the  height  of  the  thread  of  the
implant and load direction, to determine the optimum dimensions of the implant. The highest stress
concentration occurred at the region in jaw bone adjacent to the first thread of the implant. The
maximum effective stress induced by a 15 degree oblique load of 100 N was twice as high as the
maximum effective stress caused by an equal amount of vertical load. Stress distribution was more
effective in the case when the width of thread end and the height of thread were p/2 and 0.46p,
respectively, where p is the pitch of thread. At last, using tensile force calculated from the pos-
sible insert torque without breading bone thread, finite element analysis was performed on the
implant to calculate pre-stress when the primary fixation of the implant was operated in jaw bone.
The maximum effective stress was 136.8 MPa which was proven to be safe.

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