Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics · 2001
Condylar bony change and self-reported parafunctional habits in prospective orthognathic surgery patients with temporomandibular disorders.
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Yamada K, Hanada K, Fukui T, Satou Y, Ochi K, Hayashi T, Ito J
Аннотация
OBJECTIVE: The purpose of this study was to investigate the relationship between self-reported parafunctional habits and condylar bony change and disk displacement in orthognathic surgery patients with signs and symptoms of temporomandibular joint disorders.
STUDY DESIGN: This is a cross-sectional retrospective study of pretreatment helical computed tomography scans and questionnaires of 94 female orthognathic surgery patients.
RESULTS: Condylar bony change, unilaterally or bilaterally, was found in 56.4% of the subjects, or 43.6% of the joints. Disk displacement, unilaterally or bilaterally, was seen in 59.6% of the subjects, or 45.7% of the joints. Bruxism and clenching was significantly associated with condylar bony change and disk displacement. Subjects with 3 or more parafunctional habits showed a significantly higher rate of bilateral condylar bony change.
CONCLUSION: Our results suggest that bruxism and clenching might be related to deterioration of the temporomandibular joint and that the greater the number of parafunctional habits a subject has, the higher the risk of condylar bony change.
STUDY DESIGN: This is a cross-sectional retrospective study of pretreatment helical computed tomography scans and questionnaires of 94 female orthognathic surgery patients.
RESULTS: Condylar bony change, unilaterally or bilaterally, was found in 56.4% of the subjects, or 43.6% of the joints. Disk displacement, unilaterally or bilaterally, was seen in 59.6% of the subjects, or 45.7% of the joints. Bruxism and clenching was significantly associated with condylar bony change and disk displacement. Subjects with 3 or more parafunctional habits showed a significantly higher rate of bilateral condylar bony change.
CONCLUSION: Our results suggest that bruxism and clenching might be related to deterioration of the temporomandibular joint and that the greater the number of parafunctional habits a subject has, the higher the risk of condylar bony change.
Предметные рубрики MeSH
BruxismChewing GumChi-Square DistributionCross-Sectional StudiesDental Occlusion, TraumaticFemaleHumansJoint DislocationsMalocclusionMandibular CondyleMasticatory MusclesMaxillaMuscle ContractionOpen BitePrognathismProspective StudiesRange of Motion, ArticularRetrognathiaRetrospective StudiesRisk FactorsStatistics as TopicSurveys and QuestionnairesTemporomandibular Joint DiscTemporomandibular Joint DisordersTomography, X-Ray Computed