2006년 8월 박사학위논문
골조직의 골조직의 골조직의
골조직의 조건과 조건과 조건과 조건과 임플란트 임플란트 임플란트 임플란트 연결시스템
연결시스템 연결시스템
연결시스템 조건에 조건에 조건에 조건에 따른 따른 따른 따른 유한요소법적
유한요소법적 유한요소법적
유한요소법적 분석 분석 분석 분석
조 선 대 학 교 대 학 원
치 의 학 과
김 상 영
골조직의 골조직의 골조직의
골조직의 조건과 조건과 조건과 조건과 임플란트 임플란트 임플란트 임플란트 연결시스템
연결시스템 연결시스템
연결시스템 조건에 조건에 조건에 조건에 따른 따른 따른 따른 유한요소법적
유한요소법적 유한요소법적
유한요소법적 분석 분석 분석 분석
Finite Finite Finite
Finite element element element element analysis analysis analysis according analysis according according according to to to the to the the the conditions conditions conditions conditions of
of of
of implant implant implant implant connection connection connection system connection system system system and and and and bone bone bone bone qualities qualities qualities qualities surrounding
surrounding surrounding
surrounding implant implant implant implant
2006년 8월 일
조 선 대 학 교 대 학 원
치 의 학 과
김 상 영
골조직의 골조직의 골조직의
골조직의 조건과 조건과 조건과 조건과 임플란트연결 임플란트연결 임플란트연결 임플란트연결 시스템
시스템 시스템
시스템 조건에 조건에 조건에 조건에 따른 따른 따른 따른 유한요소법적 유한요소법적 유한요소법적 유한요소법적 분석
분석 분석 분석
지도교수 김 병 옥
이 논문을 치의학 박사학위신청 논문으로 제출함.
2006년 4 월 일
조 선 대 학 교 대 학 원
치 의 학 과
김 상 영
김상영의 박사학위논문을 인준함
위원장 조선대학교 교수 강 동 완 인 위 원 연세대학교 교수 최 성 호 인 위 원 조선대학교 교수 김 수 관 인 위 원 조선대학교 교수 장 현 선 인 위 원 조선대학교 교수 김 병 옥 인
2006년 6월 일
조 선 대 학 교 대 학 원
- i -
목 차
영문초록
I.서론 ···1
II.연구재료 및 방법 ···3
III.연구결과 ···8
IV.총괄 및 고찰 ···14
V.결론 ···18
참고문헌 ···20
- ii -
표 목 차
Table 1. Material properties ··· 9
- iii -
도 목 차
Fig. 1. Three dimensional geometry of full body···4 Fig. 2. Three dimensional geometry of crown···4
Fig. 3. 3.0 ㎜ in width and 7 ㎜ in length of regenerated bone (red color) and its adjacent native bone for implant with external connection. ··· 5
Fig. 4. 3.0 ㎜ in width and 7 ㎜ in length of regenerated bone (red color) and its adjacent native bone for implant with internal connection. ··· 5
Fig. 5. Three dimensional finite element model of loading condition A and B. A; Central fossa, B; Functional cusp ··· 5
Fig 6. Stress distribution on implant-bone interface surrounded by N-I and -III bone for both external and internal connection type of implant at the loading point A (Unit: MPa) ··· 11
Fig 7. Stress distribution on implant-bone interface surrounded by N-I and -III bone for both external and internal connection type of implant at the loading point B (Unit: MPa) ··· 12
Fig. 8. Stress distribution on both implant-bone interface and 3-㎜
away point from implant fixture for the internal connection type of implant at the loading point A (Unit: MPa) ··· 12
Fig. 9. Stress distribution on implant-bone interface and 3-㎜ away point surrounded by both regenerated bone and native bone for the
- iv -
internal connection type of implant at the loading point B (Unit:
MPa) ··· 13
- v -
ABSTRACT
Finite Finite Finite
Finite element element element element analysis analysis analysis according analysis according according according to to to the to the the the conditions conditions conditions conditions of of of
of implant implant implant implant connection connection connection system connection system system system and and and and bone bone bone bone qualities qualities qualities qualities surrounding
surrounding surrounding
surrounding implant implant implant implant
Kim Sang-young D.D.S. M.S.D.
Advisor: Prof. Kim Byung-ock, Ph.D.
Department of Dentistry,
Graduate School of Chosun University
The purpose of this study was to investigate the distribution of stress on the implant with internal connection type placed in the type IV regenerated bone adjacent to the native bones using three dimensional finite element stress analysis. Using EMRC NISA DISPLAY Ver. 12 program (IronCAD LLC, USA), a program was written to generate a model simulating a cylindrical block section of the mandible 20 ㎜ in height and 10 ㎜ in diameter.
Two screw type implant models, the external joint connection, and the 8° morse taper, internal joint connection, and double tapered body (5.0 ㎜ in width, 13 ㎜ in length, OSSTEM SS Ⅲ, Busan, KOREA), were modeled for this study, and was assumed to be 100% osseointegrated.
The implant with external connection type placed in native bone was used as a control group. And it was restored with gold crown with resin filling at the central fossa area. The implant was surrounded by the
- vi -
regenerated type IV bone, with 3.0 ㎜ in width and 7 ㎜ in length from the platform edge of implant. And the regenerated bone was surrounded by type I and type III of native bone, respectively. The present study used a fine grid model incorporating elements of 431,306 and nodal points of 81,046.
A load of 200N was applied at the 2 points on occlusal surfaces of the restoration, the central fossa (A point), and the functional cusp (B point), at a parallel direction to the vertical axis of the implant, respectively.
The stress values were calculated in implant-bone interface, and 3-
㎜ away point from implant fixture for implant with internal connection type. The results were as follows:
1. The main tendencies of bone stress were identical both in the internal and external connection system model and in the native and regenerated bone model, such as higher stress concentration under vertical loading applied in the functional cusp than vertical loading applied in the cental fossa, and higher stress concentration in the type I bone quality than type III bone quality .
2. In case of the implant placed into native bone, the changes of the stress values along with side of implant fixture with internal or external connection type differed.
3. In the internal connection type, stress values in regenerated bone adjacent to native type III bone quality were sometimes higher than
- vii -
those in regenerated bone adjacent to type I native bone.
4. In case of the internal connection type, stress values in point 3-mm away from implant-bone interface were higher than those in implant-bone interface at the apex of the regenerated bone.
Within the limitations of the results of this study, this study showed that the dynamic behavior of dental implant system is influenced by bone quality around the osseointegerated dental implant, connections between the implant and abutment, and loading points applied to implant prosthesis. The further research should be needed for the optimum design of dental implant to prevent bone resorption around the implant.
