Minh Son Nguyen1,2, Mare Saag1, Ülle Voog-Oras1, Toai Nguyen3, Triin Jagomägi1. 1. 1Institute of Dentistry, University of Tartu, 6 Raekoja Plats, 51003 Tartu, Estonia. 2. 2Department of Prosthodontics, Danang University of Medical Technology and Pharmacy, 99 Hung Vuong, Danang, 550000 Vietnam. 3. 3Hue University of Medicine and Pharmacy, 06 Ngo Quyen, Hue, 530000 Vietnam.
Abstract
OBJECTIVE: The aim of study was to determine the association between signs of temporomandibular disorders (TMD), occlusal support, and alterations in the craniofacial structure of elderly Vietnamese by using cephalometric analysis. METHODS: The cross-sectional study consisted of 244 participants aged 65-74 years. Participants were examined for signs of TMD, including limited mouth opening, temporomandibular joint (TMJ) crepitus, TMJ tenderness, and muscle tenderness. Dentition was divided into four occlusal support zones based on occluding pairs of posterior teeth by using Eichner's classification: Class A = 4 support zones; Class B = 1-3 support zones or only contact in anterior teeth; Class C = 0 support zones. Fifteen angular and seven linear parameters were used for sagittal craniofacial skeleton analysis. RESULTS: 10.3% of participants had limited mouth opening, 49.6% TMJ crepitus, 16.3% TMJ tenderness, and 24.2% muscle tenderness; 45.5% had Class A occlusal support, 38.5% Class B, and 16.0% Class C. Those with Class C had significantly smaller ramus inclination, articular angle, and angles formed by the mandibular plane and shorter facial height compared to Class A and Class B (P < .001). TMD signs were significantly associated with: angles formed by mandibular plane, gonial angle, cranial base angle, effective mandibular length, and anterior facial height (P < .05). CONCLUSIONS: The alteration of craniofacial structures was significantly associated with TMD signs among elderly Vietnamese. The higher number of lost occlusal support zones, the more significant the changes to craniofacial structures.
OBJECTIVE: The aim of study was to determine the association between signs of temporomandibular disorders (TMD), occlusal support, and alterations in the craniofacial structure of elderly Vietnamese by using cephalometric analysis. METHODS: The cross-sectional study consisted of 244 participants aged 65-74 years. Participants were examined for signs of TMD, including limited mouth opening, temporomandibular joint (TMJ) crepitus, TMJ tenderness, and muscle tenderness. Dentition was divided into four occlusal support zones based on occluding pairs of posterior teeth by using Eichner's classification: Class A = 4 support zones; Class B = 1-3 support zones or only contact in anterior teeth; Class C = 0 support zones. Fifteen angular and seven linear parameters were used for sagittal craniofacial skeleton analysis. RESULTS: 10.3% of participants had limited mouth opening, 49.6% TMJ crepitus, 16.3% TMJ tenderness, and 24.2% muscle tenderness; 45.5% had Class A occlusal support, 38.5% Class B, and 16.0% Class C. Those with Class C had significantly smaller ramus inclination, articular angle, and angles formed by the mandibular plane and shorter facial height compared to Class A and Class B (P < .001). TMD signs were significantly associated with: angles formed by mandibular plane, gonial angle, cranial base angle, effective mandibular length, and anterior facial height (P < .05). CONCLUSIONS: The alteration of craniofacial structures was significantly associated with TMD signs among elderly Vietnamese. The higher number of lost occlusal support zones, the more significant the changes to craniofacial structures.
Authors: Wilson Guilherme Nunes Rosa; Ricardo de Lima Navarro; Ana Cláudia de Castro Ferreira Conti; Marcio Rodrigues de Almeida; Paula Vanessa Pedron Oltramari-Navarro Journal: Braz Oral Res Date: 2015-02-16
Authors: Dietmar Gesch; Olaf Bernhardt; Dietrich Alte; Christian Schwahn; Thomas Kocher; Ulrich John; Elke Hensel Journal: Quintessence Int Date: 2004-02 Impact factor: 1.677