Three-dimensional finite element analysis of unilateral mastication in malocclusion cases using cone-beam computed tomography and a motion capture system
양헌무, 차정열, 홍기석, 박종태,
소속 상세정보
양헌무 ( Yang Hun-Mu ) - Dankook University College of Medicine Department of Anatomy
차정열 ( Cha Jung-Yul ) - Yonsei University College of Dentistry Department of Orthodontics
홍기석 ( Hong Ki-Seok ) - Dankook University College of Dentistry Perio-Implant Research Center
박종태 ( Park Jong-Tae ) - Dankook University College of Dentistry Department of Oral Anatomy
KMID : 0363020160460020096
Abstract
Purpose: Stress distribution and mandible distortion during lateral movements are known to be closely linked to bruxism, dental implant placement, and temporomandibular joint disorder. The present study was performed to determine stress distribution and distortion patterns of the mandible during lateral movements in Class I, II, and III relationships.
Methods: Five Korean volunteers (one normal, two Class II, and two Class III occlusion cases) were selected. Finite element (FE) modeling was performed using information from cone-beam computed tomographic (CBCT) scans of the subjects’ skulls, scanned images of dental casts, and incisor movement captured by an optical motion-capture system.
Results: In the Class I and II cases, maximum stress load occurred at the condyle of the balancing side, but, in the Class III cases, the maximum stress was loaded on the condyle of the working side. Maximum distortion was observed on the menton at the midline in every case, regardless of loading force. The distortion was greatest in Class III cases and smallest in Class II cases.
Conclusions: The stress distribution along and accompanying distortion of a mandible seems to be affected by the anteroposterior position of the mandible. Additionally, 3-D modeling of the craniofacial skeleton using CBCT and an optical laser scanner and reproduction of mandibular movement by way of the optical motion-capture technique used in this study are reliable techniques for investigating the masticatory system.
키워드
Finite element analysis; Malocclusion; Mastication; Masticatory muscles
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