Associação de fatores oclusais e gengivais com lesão cervical não cariosa: estudo controlado e pareado

• Ano de defesa: 2013
• Autor(a) principal: Adriana Gonçalves da Silva
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Oclusão dentária; Força de mordida; Desgaste dos dentes; Fatores de risco; Força da mordida; Mucosa bucal; Oclusão (Odontologia)
• Link de acesso: http://hdl.handle.net/1843/BUOS-9KSGM4

The non-carious cervical lesion (NCCL) is characterized by the loss of tooth structure at the cemento-enamel junction (CEJ). It has been suggested that lateral occlusal loads cause cusp bending and large stress concentration on the tooth cervical region. Furthermore, gingival recession may be associated with the origin of NCCL acting as a contributing factor. The purpose of this study was to investigate the factors associated to occlusal and gingival NCCL. This is an observational, cross-sectional controlled and matched study in humans, the unit of analysis being a couple of premolars selected in each individual. The premolars featuring NCCL were assigned to the case group while premolars without NCCL were part of the control group. For the control group, a counterpart tooth, or the tooth adjacent to the premolar determined as appropriate, was selected. The risk variables studied were: presence of occlusal tooth wear, centric occlusal contacts, presence of contact during lateral movement and protrusion of the mandible, height of keratinized mucosa and the gingival biotype. Presence of LCNC was taken as the outcome variable. The random sample consisted of 56 volunteers who met the selection criteria. A calibrated examiner [Kappa= (0,89 -1,0) and Intraclass correlation coefficient = 0,97] performed the clinical evaluation for the different diagnostic criteria. The results obtained using the McNemar test for categorical risk variables showed no significant association between the variables and the gingival biotype with NCCL (p>.05). The Wilcoxon statistical test showed that the case group height of keratinized mucosa (p=0.046) and height of attached gingiva (p=0.023) were significantly lower than those of the control group. Conclusion was drawn that no association existed between occlusal factors and NCCL. The height of keratinized mucosa as well of inserted gingival seem to act as collaborator factors for the NCCL occurrence.