Biomechanical analysis of three kinds of rigid internal fixation methods for condylar head fractures.
10.7518/hxkq.2025.2024291
- Author:
Junhui SUN
1
;
Duoduo LAN
1
;
Dong WANG
1
;
Yao XU
1
;
Zeyu WANG
1
;
Chenchen ZHANG
1
;
Kai ZHANG
1
;
Tao XU
1
Author Information
1. Dept. of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Bengbu Medical University, Bengbu 233004, China.
- Publication Type:Journal Article
- Keywords:
condylar head fracture;
rigid internal fixation;
three dimensional finite element analysis
- MeSH:
Fracture Fixation, Internal/instrumentation*;
Mandibular Condyle/surgery*;
Biomechanical Phenomena;
Bone Screws;
Finite Element Analysis;
Humans;
Mandibular Fractures/surgery*;
Bone Plates;
Titanium;
Stress, Mechanical
- From:
West China Journal of Stomatology
2025;43(1):126-132
- CountryChina
- Language:English
-
Abstract:
OBJECTIVES:This study aims to analyze the biomechanics of three kinds of rigid internal fixation methods for condylar head fractures.
METHODS:A three dimensional finite element model of the normal mandible was constructed. It was then used to prepare condylar head fracture finite element model and three kinds of rigid internal fixation finite element model (unilateral tension screw, bilateral tension screw, tension screw+titanium plate). The mechanical characteristics and changes of the mandible condyle under the same mechanical conditions were compared among the three different rigid internal fixation methods.
RESULTS:The maximum equivalent stress and displacement of the non-free end of condyle under the rigid internal fixation method of unilateral tension screw were 71.03 MPa and 4.72 mm, respectively. The maximum equivalent stress and displacement of the free end of condyle were 78.45 MPa and 4.50 mm, respectively. The maximum stress of fracture suture was 3.27 MPa. The maximum equivalent stress and displacement of the non-free end of condyle under the rigid internal fixation method of bilateral tension screw were 70.52 MPa and 4.00 mm, respectively. The maximum equivalent stress and displacement of the free end of condyle were 72.49 MPa and 3.85 mm, respectively. The maximum stress of fracture suture was 2.33 MPa. The maximum equivalent stress and maximum displacement of the non-free end of condyle under the rigid internal fixation method of tension screw+titanium plate were 67.26 MPa and 2.66 mm, respectively. The maximum equivalent stress and maximum displacement of the free end of condyle were 69.66 MPa and 2.50 mm, respectively. The maximum stress of fracture suture was 2.18 MPa.
CONCLUSIONS:The tension screw+titanium plate rigid internal fixation method is the most conducive to biomechanical distribution for condylar head fractures.
