Cephalometric norms of the population of the state of Kuwait
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The purpose of this study was to formulate cephalometric norms for the population of Kuwait. The population of Kuwait consists mainly of two well-defined groups. An indigenous Arab group and, due to settling and immigration, a well-defined Kuwaiti group that is of Persian extraction. Part of this investigation was to evaluate whether significant cephalometric differences exist between the two Kuwaiti ethnic groups. Lateral cephalometric radiographs were collected for the two ethnic groups studied. The subjects studied were all born to parents, and grandparents of pure Arab or Persian heritage. They all demonstrated esthetically pleasing faces, Angle I molar relationships, all of their permanent teeth present and none of the subjects had a history of orthodontic treatment or facial trauma. All the subjects were at least 18 years of age. Twenty-nine angular, and linear cephalometric measurements were studied statistically. Cephalometric norms were established for the two ethnic groups studied. Statistically, several significant differences were recognized between the two groups studied. The most noteworthy differences were observed for the angles SNA and SNB and for the linear measurements of the maxilla and mandible. Some significant soft tissue differences were also recorded. Overall, the majority of the measurements studied were not statistically different for the two cohorts of subjects studied.