Document Detail

Effect of eccentric clenching on mandibular deviation in the vicinity of mandibular rest position.
MedLine Citation:
PMID:  10672154     Owner:  NLM     Status:  MEDLINE    
Although the mechanical compression of the temporomandibular joint (TMJ), which could be caused by bruxism, would probably result in a slight change of the occlusal relationship, the effect of clenching in the eccentric mandibular position on the occlusal contact has not yet been clarified. This study aimed to investigate the effect of eccentric clenching on bilateral condylar position and thus to estimate any change of occlusal contact. Before and after voluntary clenching, with one third of the maximal voluntary clenching force, for 3 min at the canine edge-to-edge position, vertical deviation of the bilateral condyles was measured at the 1 mm open mandibular position. This was regulated by the three-dimensional position of the anterior reference point which stands for the incisor point. The mean vertical displacement of the highly deviated side of the condyle was 141+/-55 microm, and the calculated mean displacement of the mandibular first molar region of the highly deviated side was 65+/-27 microm. From the results of this study, it was revealed that the eccentric clenching gave rise to three-dimensional deviation of the mandible even when the mandible was in the vicinity of the rest position.
S Minagi; T Ohmori; T Sato; T Matsunaga; Y Akamatsu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oral rehabilitation     Volume:  27     ISSN:  0305-182X     ISO Abbreviation:  J Oral Rehabil     Publication Date:  2000 Feb 
Date Detail:
Created Date:  2000-03-21     Completed Date:  2000-03-21     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0433604     Medline TA:  J Oral Rehabil     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  175-9     Citation Subset:  D; IM    
Department of Removable Prosthodontics, Okayama University Dental School, Okayama, Japan.
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MeSH Terms
Bite Force
Bruxism / physiopathology
Cuspid / anatomy & histology
Dental Occlusion
Incisor / anatomy & histology
Jaw Relation Record / instrumentation
Mandible / anatomy & histology*
Mandibular Condyle / anatomy & histology
Masticatory Muscles / physiology*
Molar / anatomy & histology
Muscle Contraction / physiology*
Stress, Mechanical
Temporomandibular Joint / physiopathology
Vertical Dimension*

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