| Autor: |
Ângelo DF; Instituto Português da Face, 1500-493 Lisbon, Portugal.; Centre for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria, 2430-028 Marinha Grande, Portugal.; Faculty of Medicine, Lisboa University, 1649-028 Lisbon, Portugal.; Serviço de Estomatologia Hospital Egas Moniz, Centro Hospitalar de Lisboa Ocidental, 1349-019 Lisbon, Portugal.; Centro Hospitalar Universitário Lisboa Norte (CHUNL), Clinica Universitária de Estomatologia, 1648-028 Lisbon, Portugal., Faria-Teixeira MC; Faculty of Medicine, Lisboa University, 1649-028 Lisbon, Portugal., Maffia F; Instituto Português da Face, 1500-493 Lisbon, Portugal.; Maxillofacial Surgery Unit, Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples 'Federico II', Via Sergio Pansini 5, 80131 Naples, Italy., Sanz D; Instituto Português da Face, 1500-493 Lisbon, Portugal., Sarkis M; Instituto Português da Face, 1500-493 Lisbon, Portugal., Marques R; Instituto Português da Face, 1500-493 Lisbon, Portugal., Mota B; Instituto Português da Face, 1500-493 Lisbon, Portugal.; Centro Hospitalar Universitário Lisboa Norte (CHUNL), Clinica Universitária de Estomatologia, 1648-028 Lisbon, Portugal., João RS; Department of Computer Science and Quantitative Methods, School of Management and Technology, Polytechnic Institute of Santarém, 2001-904 Santarém, Portugal.; CEAUL-Centro de Estatística e Aplicações, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisbon, Portugal.; Center for Global Studies (CEG-UAb), Aberta University, 1250-100 Lisbon, Portugal.; Nursing Research, Innovation and Development Center of Lisbon (CIDNUR), 1600-190 Lisbon, Portugal., Cardoso HJ; Instituto Português da Face, 1500-493 Lisbon, Portugal. |
| Abstrakt: |
Background/Objectives : Temporomandibular disorders (TMD) encompass a range of musculoskeletal and neuromuscular conditions affecting the temporomandibular joint (TMJ) and associated structures. This cross-sectional study, conducted in a Portuguese TMD department, aimed to assess the relationship between malocclusion and TMD severity. Methods : Data on demographic variables, TMD clinical symptoms, and malocclusion classes were collected using the EUROTMJ database. The Chi-square test (χ 2 ) identified associations, with their intensity measured by Cramér's V (φc). Results : The study included 1170 patients (932 females and 238 males), with a mean age of 41.73 ± 16.80 years. Most patients exhibited Angle Class I malocclusion (85.5%), followed by Angle Class II (13.5%) and Angle Class III (1.1%). Class II malocclusion was associated with increased TMD severity ( p < 0.001), higher myalgia levels ( p = 0.002), more frequent disc displacement without reduction ( p = 0.002) and lower maximum mouth opening values (Class II: 38.13 ± 7.78 mm, Class I: 39.93 ± 8.67 mm). Significant associations were also found between malocclusion type and arthralgia ( p = 0.021), mouth-opening limitation ( p = 0.016), and TMJ crepitus ( p = 0.017). In cases of malocclusion, the presence of oral signs of bruxism explained the degree of myalgia, disc displacement, and severity ( p = 0.003; p = 0.048; p = 0.045). Conclusions : This study highlights that (1) the most common type of dental malocclusion in TMD patients was Class I; (2) Class II malocclusion was associated with increased TMD severity and oral signs of bruxism; and (3) Class III was rarely observed in TMD consultation. The findings suggest that bruxism behavior in cases of malocclusion may be significant in TMD. |
