| 임플랜트 고정체-지대주 연결부의 형태와 직경이 임플랜트의 기계적 실패에 미치는 영향 |
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윤보혁1, 신현모2, 윤미정3, 허중보4, 정창모5, 강은숙6 |
1부산대학교 치의학전문대학원 보철학교실
2부산대학교 치의학전문대학원 보철학교실
3부산대학교 치의학전문대학원 보철학교실
4부산대학교 치의학전문대학원 보철학교실
5부산대학교 치의학전문대학원 보철학교실
6인제대학교 해운대 백병원 보철과 |
| Effect of morphology and diameter of implant fixture-abutment connection on mechanical failure of implants |
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Bo-Hyeok Yun1, Hyon-Mo Shin2, Mi-Jung Yun3, Jung-Bo Huh4, Chang-Mo Jeong5, Eun-Sook Kang6 |
1Department of Prosthodontics, College of Dentistry Pusan National University
2Department of Prosthodontics, College of Dentistry Pusan National University
3Department of Prosthodontics, College of Dentistry Pusan National University
4Department of Prosthodontics, College of Dentistry Pusan National University
5Department of Prosthodontics, College of Dentistry Pusan National University
6Department of Prosthodontics, In-Je University Haeundae Paik Hospital |
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| Abstract |
Purpose
This study was conducted to evaluate the effect of the fixture abutment connection type and diameter on the screw joint stability in external butt joint for 2nd surgery and internal cone connected type implant system for 1st and 2nd surgery using ultimate fracture strength. Materials and Methods: USII system, SSII system and GSII system of Osstem Implant were used. Each system used the fixture with two different diameters and cement-retained abutments, and tungsten carbide / carbon coated abutment screws were used. Disc shaped stainless steel metal tube was attached using resin-based temporary cement. The experimental group was divided into seven subgroups, including the platform switching shaped specimen that uses a regular abutment in the fixture with a wide diameter in USII system. A static load was increased to the metal tube at 5mm deviated point from the implant central axis until it reached the compression bending strength at a rate of 1mm/min. Then the deformations and patterns of fracture in threaded connection were compared. Results and Conclusion: 1. In the comparison between the Regular diameter, compression bending strength of SSII system was higher than USII system and GSII system. There was no significant difference between USII system and GSII system. 2. In the comparison between wide diameter, compression bending strength was increased in the order of GSII system, USII system, and SSII system. 3. In comparison between the implant diameter, compression bending strength of the wide diameter was greater than the regular diameter in any system(P<0.05). 4. There was no significant difference between the platform switching (III group) and the regular diameter (I group) in USII system. 5. In USII system, fracture of abutment screw and deformation of both fixture and abutment were observed in I, II and III subgroups. 6. Failure pattern of SSII system, which was the fracture of abutment screw and deformation of the abutment and fixture, was observed in both IV and V subgroups. Fracture of some fixtures was observed in subgroup V. 7. Failure pattern of GSII system, which was the fracture of the abutment screw and deformation of the fixture and the abutment, was observed in both VI and VII subgroups. Apart from other subgroups, subgroup VII demonstrated no bending neither the fracture at the top of the fixture. The compressive deformation of internal slope in the fixture was the only thing observed in subgroup VII. |
| Key Words:
connection;mechanical failure; |
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