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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
Tsutomu Sugiura (Nara Medical University) Kazuhiko Yamamoto (Nara Medical University) Satoshi Horita (Nara Medical University) Kazuhiro Murakami (Nara Medical University) Sadami Tsutsumi (Kanazawa Institute of Technology) Tadaaki Kirita (Nara Medical University)
저널정보
대한치주과학회 Journal of Periodontal & Implant Science Journal of Periodontal & Implant Science 제47권 제4호
발행연도
2017.8
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251 - 262 (12page)

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Purpose: The purpose of this study was to investigate the effects of implant tilting and the loading direction on the displacement and micromotion (relative displacement between the implant and bone) of immediately loaded implants by in vitro experiments and finite element analysis (FEA). Methods: Six artificial bone blocks were prepared. Six screw-type implants with a length of 10 mm and diameter of 4.3 mm were placed, with 3 positioned axially and 3 tilted. The tilted implants were 30° distally inclined to the axial implants. Vertical and mesiodistal oblique (45° angle) loads of 200 N were applied to the top of the abutment, and the abutment displacement was recorded. Nonlinear finite element models simulating the in vitro experiment were constructed, and the abutment displacement and micromotion were calculated. The data on the abutment displacement from in vitro experiments and FEA were compared, and the validity of the finite element model was evaluated. Results: The abutment displacement was greater under oblique loading than under axial loading and greater for the tilted implants than for the axial implants. The in vitro and FEA results showed satisfactory consistency. The maximum micromotion was 2.8- to 4.1-fold higher under oblique loading than under vertical loading. The maximum micromotion values in the axial and tilted implants were very close under vertical loading. However, in the tilted implant model, the maximum micromotion was 38.7% less than in the axial implant model under oblique loading. The relationship between abutment displacement and micromotion varied according to the loading direction (vertical or oblique) as well as the implant insertion angle (axial or tilted). Conclusions: Tilted implants may have a lower maximum extent of micromotion than axial implants under mesiodistal oblique loading. The maximum micromotion values were strongly influenced by the loading direction. The maximum micromotion values did not reflect the abutment displacement values.
#Dental implants #Finite element analysis #Immediate dental implant loading

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참고문헌 (39)

참고문헌 신청
Brunski JB / 2000 / Biomaterials and biomechanics of oral and maxillofacial implants : current status and future developments / Int J Oral Maxillofac Implants 15:15~46 google schola Bardyn T / 2009 / Quantifying the influence of bone density and thickness on resonance frequency analysis : an in vitro study of biomechanical test materials / Int J Oral Maxillofac Implants 24:1006~1014 google schola Tabassum A / 2010 / Influence of surgical technique and surface roughness on the primary stability of an implant in artificial bone with different cortical thickness : a laboratory study / Clin Oral Implants Res 21:213~220 google schola Chang PK / 2012 / Distribution of micromotion in implants and alveolar bone with different thread profiles in immediate loading : a finite element study / Int J Oral Maxillofac Implants 27:96~101 google schola Dorjpalam Bayarchimeg / 2013 / Evaluation of the correlation between insertion torque and primary stability of dental implants using a block bone test / Journal of Periodontal & Implant Science 43(1):30~36 dbpia

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