Effect of Screw Fixation on Temporomandibular Joint Condylar Prosthesis

Purpose The objective of the present study was to evaluate the effect of the number of screws on the stress and stability of the temporomandibular joint (TMJ) condylar prosthesis and on the strain distribution in the bone. Materials and Methods Three-dimensional, finite element models of the mandibl...

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Bibliographic Details
Published inJournal of oral and maxillofacial surgery Vol. 69; no. 5; pp. 1320 - 1328
Main Authors Hsu, Jui-Ting, PhD, Huang, Heng-Li, PhD, Tsai, Ming-Tzu, PhD, Fuh, Lih-Jyh, DDS, PhD, Tu, Ming-Gene, DDS, PhD
Format Journal Article
LanguageEnglish
Published New York, NY Elsevier Inc 01.05.2011
Elsevier
Subjects
Arthroplasty, Replacement - instrumentation
Biological and medical sciences
Biomechanical Phenomena
Bite Force
Bone Screws
Chromium Alloys - chemistry
Computer Simulation
Dentistry
Elastic Modulus
Finite Element Analysis
Humans
Imaging, Three-Dimensional
Incisor - physiology
Joint Prosthesis
Male
Mandible - physiology
Mandible - surgery
Mandibular Condyle
Medical sciences
Models, Biological
Otorhinolaryngology. Stomatology
Prosthesis Design
Stress, Mechanical
Surgery
Temporomandibular Joint
Fixation
Treatment
Screw
Prosthesis
Stomatology
Surgery
Temporomandibular joint
Condyle of mandible
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Summary:Purpose The objective of the present study was to evaluate the effect of the number of screws on the stress and stability of the temporomandibular joint (TMJ) condylar prosthesis and on the strain distribution in the bone. Materials and Methods Three-dimensional, finite element models of the mandible and a TMJ condylar prosthesis with fixations involving different numbers of screws in 8 configurations were established to investigate the effect of the number of fixed screws on the stress and stability of the implant and strain in cortical and cancellous bone. Results The simulations showed that increasing the number of screws beyond 3 only slightly enhanced the implant stability and reduced the implant stress. The position of the inserted screws significantly affected the strain distributions in cortical and cancellous bone tissues. Conclusions The results of our study have shown that 3 staggered screws can provide optimal implant stability and bone stress and strain distributions in a TMJ condylar prosthesis.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0278-2391
1531-5053
DOI:10.1016/j.joms.2010.05.074