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Biomechanical evaluation of the human mandible after temporomandibular joint replacement under different biting conditions
- Source :
- Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021), Scientific Reports, 11(1), Scientific Reports, SCIENTIFIC REPORTS
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Temporomandibular joint (TMJ) replacement with an implant is only used when all other conservative treatments fail. Despite the promising short-term results, the long-term implications of TMJ replacement in masticatory function are not fully understood. Previous human and animal studies have shown that perturbations to the normal masticatory function can lead to morphological and functional changes in the craniomaxillofacial system. A clearer understanding of the biomechanical implications of TMJ replacement in masticatory function may help identify design shortcomings that hinder their long-term success. In this study, patient-specific finite element models of the intact and implanted mandible were developed and simulated under four different biting tasks. In addition, the impact of re-attaching of the lateral pterygoid was also evaluated. The biomechanics of both models was compared regarding both mandibular displacements and principal strain patterns. The results show an excessive mediolateral and anteroposterior displacement of the TMJ implant compared to the intact joint in three biting tasks, namely incisor (INC), left moral (LML), and right molar (RML) biting. The main differences in principal strain distributions were found across the entire mandible, most notably from the symphysis to the ramus of the implanted side. Furthermore, the re-attachment of the lateral pterygoid seems to increase joint anteroposterior displacement in both INC, LML and RML biting while reducing it during LGF. Accordingly, any new TMJ implant design must consider stabilising both mediolateral and anteroposterior movement of the condyle during biting activities and promoting a more natural load transmission along the entire mandible. ispartof: SCIENTIFIC REPORTS vol:11 issue:1 ispartof: location:England status: published
- Subjects :
- Models, Anatomic
0301 basic medicine
Joint Prosthesis
Mandible
Engineering
Medicine and Health Sciences
Orthodontics
Multidisciplinary
Temporomandibular Joint
Biomechanics
IMPLANT DESIGN
Biomechanical Phenomena
Masticatory force
Multidisciplinary Sciences
Treatment Outcome
medicine.anatomical_structure
Science & Technology - Other Topics
Medicine
BONE
Algorithms
Technology and Engineering
DISORDERS
Symphysis
Science
Finite Element Analysis
Prosthesis Design
LATERAL PTERYGOID MUSCLE
Article
Condyle
03 medical and health sciences
Medical research
Imaging, Three-Dimensional
stomatognathic system
DEFORMATION
PROSTHESES
medicine
Humans
RECONSTRUCTION
Displacement (orthopedic surgery)
KINEMATICS
Science & Technology
business.industry
Temporomandibular joint
030104 developmental biology
Biting
030101 anatomy & morphology
Tomography, X-Ray Computed
FOLLOW-UP
business
FINITE-ELEMENT
Subjects
Details
- ISSN :
- 20452322
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....001e9a998fa885b89ec34cf373d8ee5a