Biomechanical study of cystic lesions of the mandible based on a three-dimensional finite element model.
10.12122/j.issn.1673-4254.2020.06.21
- Author:
Yaqian PANG
1
;
Kai ZHANG
1
;
Liang LIU
1
;
Dajun FENG
2
;
Chang LIU
1
;
Jing WANG
1
;
Yue DU
1
;
Zhenfei GUO
1
Author Information
1. Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China.
2. Department of Oral and Maxillofacial Surgery, Fourth Affiliated Hospital of Anhui Medical University, Hefei 230001, China.
- Publication Type:Journal Article
- Keywords:
biomechanics;
cystic lesion;
finite element analysis;
mandible
- MeSH:
Adult;
Biomechanical Phenomena;
Female;
Finite Element Analysis;
Humans;
Imaging, Three-Dimensional;
Mandible;
Stress, Mechanical
- From:
Journal of Southern Medical University
2020;40(6):911-915
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To analyze the biomechanics of cystic lesions in the mandibular body in a three-dimensional (3D) finite element model.
METHODS:A 3D finite element model of cystic lesion of the mandibular body was constructed based on the CT images of the mandible of a healthy adult female volunteer with normal occlusion. The size of the cyst and the residual bone wall were analyzed when the lesion area approached the stress peak under certain constraints and loading conditions.
RESULTS:When the size of the cyst reached 37.63 mm×11.32 mm×21.45 mm, the maximal von Mises stress in the lesion area reached 77.295 MPa, close to the yield strength of the mandible with a risk of pathological fracture. At this point, the remaining bone thickness of the buccal and lingual sides and the lower margin of the mandible in the lesion area was 1.52 mm, 0.76 mm and 1.04 mm, respectively.
CONCLUSIONS:Residual bone mass is an important factor to affect the risk of pathological fracture after curettage of cystic lesions. A thickness as low as 1 mm of the residual bone cortex in the cystic lesion area of the mandibular body can be used as the threshold for a clinical decision on one-stage windowing decompression combined with two- stage curettage.
