Three-dimensional finite element analysis of the deformation of the human mandible: a preliminary study from the perspective of orthodontic mini-implant stability

• 발행기관: 대한치과교정학회
• 저자명: Sun-Hye Baek Hyun-Suk Cha Jung-Yul Cha Yoon-Shik Moon Sang-Jin Sung
• 간행물 정보: 『The Korean Journal of Orthodontics』제42권 제4호, 159~168쪽, 전체 10쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2012.08.31

영문 초록

Objective: The aims of this study were to investigate mandibular deformation under clenching and to estimate its effect on the stability of orthodontic mini-implants (OMI). Methods: Three finite element models were constructed using computed tomography (CT) images of 3 adults with different mandibular plane angles (A, low; B, average; and C, high). An OMI was placed between #45 and #46 in each model. Mandibular deformation under premolar and molar clenching was simulated. Comparisons were made between peri-orthodontic mini-implant compressive strain (POMI-CSTN) under clenching and orthodontic traction forces (150 g and 200 g). Results: Three models with different mandibular plane angles demonstrated different functional deformation characteristics. The compressive strains around the OMI were distributed mesiodistally rather than occlusogingivally. In model A, the maximum POMI-CSTN under clenching was observed at the mesial aspect of #46 (1,401.75 microstrain [ՌE]), and similar maximum POMI-CSTN was observed under a traction force of 150 g (1,415 ՌE). Conclusions: The maximum POMI-CSTN developed by clenching failed to exceed the normally allowed compressive cortical bone strains; however, additional orthodontic traction force to the OMI may increase POMI-CSTN to compromise OMI stability. [Korean J Orthod 2012;42(4):159-168]

키워드

Orthodontic mini-implant Stability Neuromuscular force Anatomy Finite element method