RESUMO
The anatomy of the posterior mandibular ridge and the anatomical structures present in this region are important in the planning and execution of dental treatments. The aim of this study was to examine all forms of alveolar ridge in detail to provide a comprehensive description of the posterior mandibular ridge. This study included 1865 cross-sectional sections of cone beam computed tomography scans obtained from 511 Iranian patients with a mean age of 48.14 years (280 female, 231 male). The alveolar ridge was described based on the ridge shape, including the existence and location of convexity and concavity. The morphology of the posterior mandibular ridge was categorized into 14 types: straight, pen shape, oblique, D type, B type, kidney, hourglass, sickle, golf club, toucan beak, tear, cudgel, basal, and saddle. Among the alveolar ridge types, the straight type in the premolar region and toucan beak type in the molar region were most frequent in the female, male, dentulous, and edentulous ridges. This study found significant differences in alveolar ridge morphology according to sex, dental status, and region of the ridge (all P < 0.001). In conclusion, the morphology of the alveolar ridge varies significantly between the sexes and between dentulous and edentulous locations.
Assuntos
Mandíbula , Boca Edêntula , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Estudos Transversais , Irã (Geográfico) , Mandíbula/diagnóstico por imagem , Mandíbula/anatomia & histologia , Processo Alveolar/diagnóstico por imagem , Tomografia Computadorizada de Feixe Cônico/métodosRESUMO
Systemic sclerosis (scleroderma) is a multisystem disease involving the skin, lungs, heart, kidneys and gastrointestinal tract. It is probably owing to a disorder of the immune system. It may also have some oral manifestations, including limited ability to open the mouth, widening of the periodontal ligament (PDL) space and mandibular bone resorption. We report here on three asymptomatic cases that were referred to our oral and maxillofacial radiology centre for another reason, and in which we suspected scleroderma based on the widening of the PDL in the panoramic view. The early diagnosis was finally confirmed by pathological findings.