Evaluation of the dimensions, morphology, and position of the mandibular condyles in individuals with neurofibromatosis 1: a case-control study.

OBJECTIVES: The aim of this study was to evaluate the mandibular condyles of neurofibromatosis 1 (NF1) individuals without facial plexiform neurofibroma using cone beam computed tomography images. MATERIALS AND METHODS: Eighty cone beam computed tomography scans (160 mandibular condyles) were analyzed: 40 from NF1 individuals (study group) and 40 from individuals without NF1 (control group). The anteroposterior and mediolateral dimensions, height, and volume of the mandibular condyles were measured. The mandibular condyles were classified according to their morphology: healthy (absence of morphological changes), with flattening (loss of rounded contour of at least one of the surfaces), with erosion (loss of continuity of the cortical bone), with osteophyte (exophytic formation of the condyle surface), and with sclerosis (any increase in the cortical thickness in the load-bearing areas). Furthermore, the position of the mandibular condyles in relation to the joint fossa in an anteroposterior view was classified as anterior, concentric, or posterior. RESULTS: The study group had a higher anteroposterior dimension of the mandibular condyles compared with the control group (p < 0.05). There were no differences in condylar morphology and position between both groups (p > 0.05). The morphological alterations were not associated with sex or age in any group evaluated (p > 0.05). For both groups, the concentric position was the most common. For the study group, there was a significant difference in the condylar position between the sides (p < 0.05). CONCLUSIONS: NF1 individuals without facial plexiform neurofibroma present a high prevalence of condyles with a large anteroposterior dimension and asymmetric position in the joint fossa. However, no morphological and volumetric changes were observed in the mandibular condyles of them. CLINICAL RELEVANCE: The knowledge of the TMJ alterations in individuals with NF1 is important to establish an evaluation protocol, which would allow early intervention if indicated.

Evaluación de la simetría bilateral del canal mandibular en las radiografía panorámicas / Evaluation of bilateral symmetry of the mandibular canal in panoramic radiographs

El canal mandíbular es un trayecto intraóseo con origen en el agujero mandibular y término en el agujero mentoniano por donde pasan el nervio, la arteria y las venas alveolares inferiores. El conocimiento de la anatomía es fundamental para la realización exitosa de la intervención odontológica, ya que evita injurias neurosensoriales. El objetivo del estudio fue evaluar morfológicamente la simetría bilateral de los canales de la mandíbula en las distintas regiones de la extensión anteroposterior; para esto se utilizaron 63 radiografías panorámicas pertenecientes al archivo de la Facultad de Odontología de la UFJF; clasificadas en tres grupos diferentes: pacientes con dientes bilaterales (Grupo I); pacientes con dientes posteriores sólo de un lado (Grupo II); pacientes desdentados bilaterales (Grupo III). Dos evaluadores realizaron mediciones lineales verticales bilaterales en siete puntos del trayecto del canal. Las medidas obtenidas fueron sometidas al test T (p<0,05). No se observó una diferencia estadísticamente significativa en el grupo I y III y sólo uno de los evaluadores encontró, para uno de los puntos estudiados (distancia del agujero mentoniano al borde), una diferencia significativa entre el lado dentado y el desdentado. Se puede concluir que, con relación a la altura del canal mandibular, existe una tendencia a la simetría entre los lados derecho e izquierdo de un mismo individuo

The mandibular canal is a intraosseous path with origin in the mandibular foramen and end in the mentual foramen, it transmits the alveolar inferior nerve, artery and vein. Anatomy knowledge is essential for the successful of dental interventions, preventing neurosensory injuries. The aim of this study was to evaluate morphometrically the bilateral symmetry of the mandibular canals in distinct regions of its anteroposterior extension. For that were used 63 panoramic radiographs belonging to the archives of the Faculty of Dentistry of UFJF, classified into three different groups: patients toothed bilateral (Group I), patients with posterior teeth one side only (Group II), patients edentulous bilateral (Group III). Bilateral linear vertical measurements in seven points of the path of the canal were carried out by two evaluators. The measures were submitted to test T (p <0.05). There were no statistically significant differences observed for groups I and III, and only one of the evaluators found, for one of the studied points (distance of the edge to the foramen mentual), a significant difference between the dentated and edentulous side. It can be concluded that, in relation to the height of the mandibular canal, a trend to the symmetry between the sides' right and left of one same individual

Displasia fibrosa monostótica: relato de um caso / Monostotic fibrous dysplasia: a case report

Neste trabalho é relatado um caso de displasia fibrosa monostótica envolvendo o lado esquerdo da maxila, em um paciente do gênero masculino que foi examinado pela primeira vez na adolescência e posteriormente na idade adulta. Foi necessária a realização da intervenção cirúrgica visando a obtenção de resultados estéticos e funcionais. São abordados e discutidos aspectos clínicos e radiográficos desta condição, antes e após a realização do tratamento

Cisto odontogênico glandular: uma lesão rara / Glandular odontogenic cisty: a rare lesion

Esta revisão da literatura sobre o cisto odontogêncio glandular justifica-se pela raridade dessa lesão. Os aspectos clínicos, radiográfico e histopatológicos da entidade patológica em questão são cuidadosamente abordados e ênfase especial é dada às considerações conflitantes dos diversos autores