Nasal Dorsum Anatomy of Major Different Ethnicities-Surgical Implications: A Multicenter Radiologic Study.

Background: The heterogeneity of nasal features across different racial and ethnic groups is evident. This large-scale multicenter study was performed to evaluate the dorsal keystone area and its relation to superficial nasal anatomy through computed tomography (CT) scans.

Methods: Six populations were included: South Caucasian, Middle Eastern, Black South African, Eastern Asian, Mestizo, and Eastern European.

Investigation of the variability of the pterygomandibular space from the point of view of the target point of the inferior alveolar nerve block.

Introduction: A thorough knowledge of the anatomy and variability of the pterygomandibular space (PMS) is essential to the success of local anesthesia. This study is aimed at determining the volume of the PMS depending on the shape of the skull, face and mandible using the computed tomography (CT).

Materials And Methods: anonymized computed tomograms of 48 adult patients were analyzed, the indicators of the cranial index (CI), facial index (FI) according to Yzard, the high lengthy index of the mandible (HLI), the latitudinal-altitude index of the mandible (LAI), the longitudinal latitude index of the mandible (LLI) were calculated.