A comparison of fixation methods using three-dimensional finite element analysis following anterior segmental osteotomy
윤경인, 박민규, Park Myung-Kyun, 박재억,
소속 상세정보
윤경인 ( Yun Kyoung-In ) - Catholic University College of Medicine St. Paul’s Hospital Department of Oral and Maxillofacial Surgery
박민규 ( Park Min-Kyu ) - Catholic University College of Medicine Department of Oral and Maxillofacial Surgery
( Park Myung-Kyun ) - Myongji University Department of Mechanical Engineering
박재억 ( Park Je-Uk ) - Catholic University College of Medicine Department of Oral and Maxillofacial Surgery
KMID : 0355620120380060332
Abstract
Objectives: This study sought to evaluate fixation methods and determine the best method for the postoperative stabilization of maxillary osteotomy. For our analysis we performed a three-dimensional finite element analysis of stress distribution on the plate, screw, and surrounding bone, as well as displacement onto the plate.
Materials and Methods: We generated a model using synthetic skull scan data; an initital surface model was changed to a solid model using software. Modified anterior segmental osteotomy (using Park’s method) was made using the program, and four different types of fixation methods were used. An anterior load of 100 N was applied on the palatal surface of two central incisors.
Results: The Type 1 (L-shaped) fixation method gave stresses of 187.8 MPa at the plate, 45.8 MPa at the screw, and 15.4 MPa at the bone around the plate. The Type 2 (I-shaped) fixation method gave stresses of 186.6 MPa at the plate, 75.7 MPa at the screw, and 13.8 MPa at the bone around the plate. The Type 3 (inverted L-shaped) fixation method gave stresses of 28.6 MPa at the plate, 29.9 MPa at the screw, and 15.3 MPa at the bone around the plate. The Type 4 (I-shaped) fixation method gave stresses of 34.8 MPa at the plate, 36.9 MPa at the screw, and 14.9 MPa at the bone around the plate. The deflection of the plates for the four fixation methods was 0.014 mm, 0.022 mm, 0.017 mm, and 0.018 mm, respectively.
Conclusion: The Type 3 (inverted L-shaped) fixation method offers more stability than the other fixation methods. We therefore recommend this method for the postoperative stabilization of maxillary osteotomy.
키워드
Anterior segmental osteotomy; Fixation techniques; 3D finite element analysis
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