Abstract
The purpose of this study was to determine the cephalometric norms of typical Arab young adults with class I molar relationship and well-balanced face and to compare these norms with those derived from matched Chinese subjects. Lateral cephalometric of 71 Arab adults (37 males age 20–26) (female age 20–26) were compared with 76 Chinese young adults (42 male age 20–26) (34 female 20–26).Each lateral cephalogram were traced and digitized using cephalometric software program according to Steiner analysis. Advanced maxilla and protruded mandible observed in Chinese sample compared with the Arab sample showed greater mean and standard deviation in SNA, SNB and ANB angles (p < 0.001). More proclination in upper and lower incisor teeth according to (U1/NA, L1/NA) angles observed in the Chinese sample, on the other hand, the mean value of MP/SN was higher in Arabs than that in Chinese (p < 0.001) showing more vertical growth and increased lower facial height. Also greater horizontal growth was observed in Arabs according to average value of SN/OP angle when compared to the Chinese sample (p < 0.001). There are some fundamental ethnic differences in the craniofacial and skeletal measurements between Arabs and Chinese young adult. Theses variations support the idea that a single standard in facial aesthetics should not be applied and used to all racial and ethnic groups. The results of this study showed that the Chinese’s Maxilla and Mandible were more protruded than Arabs, while Arabs had a higher angle of both the occlusal and mandibular planes.
Highlights
Food and shelter were considered before the basic necessities of life but with increasing communication, paying attention to appearances and the desire to achieve ideal proportional face, focusing on the face and the jaws increased substantially
The results of this study showed that the Chinese’s Maxilla and Mandible were more protruded than Arabs, while Arabs had a higher angle of both the occlusal and mandibular planes
We focused on the comparison of cephalometric landmarks of Arab and Chinese adults
Summary
Food and shelter were considered before the basic necessities of life but with increasing communication, paying attention to appearances and the desire to achieve ideal proportional face, focusing on the face and the jaws increased substantially. The applications of cephalometric studies were introduced in classical anthropometry which is dealt with human growth and development, since numerous types of cephalometric analysis had been created to reach these ideal beauty measurements and to evaluate craniofacial variations. The method of standard radiograph for head and neck region was discovered eighty years ago which turned out to be a major advance in the medical field especially to the science related to the growth of the face and the jaw. In 1931 Broadbent and Hofrath [1] in Germany and USA published the first method of how obtaining standardized cephalometric head films. Down was the one who established the first cephalometric analysis in the USA in 1984 providing a practical cephalometric analysis for diagnostic purposes
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