Danaei Shahla Momeni, Oshagh Morteza, Khoda Maryam Omid, Karamifar Amir Ali, Maram Shahin Sotoudeh, Borhan-Haghighi Zohre
Department of Orthodontics, Faculty of Dentistry, Shiraz University, Shiraz, Iran.
World J Orthod. 2010 Winter;11(4):e19-25.
Orthodontic need assessment is instrumental for dental treatment planning. The objective of this examination was to evaluate the orthodontic treatment need of students in Shiraz, Iran, using the Dental Aesthetic Index (DAI) and to assess the relationship between DAI and sociodemographic variables.
Using random cluster sampling, 1,818 pupils (965 male and 853 female) 14 to 18 years of age without any history of orthodontic treatment were selected. Information was gathered using a questionnaire, including demographics such as sex, family size, and parents' education. Orthodontic assessments were performed by two orthodontists over 2 months. The data were analyzed with chi-square and t tests.
Many of the subjects (48.3%) had no need for orthodontic treatment. About one-fifth of the population (21%) had intense-to-disabling malocclusions, and 8.4% had disabling malocclusion with compulsory treatment needs. The study showed a close relationship between sex and malocclusion.
The study showed that Iranian youth in Shiraz had better dental appearances and less orthodontic treatment need than some populations (Japanese, Caucasian and Native Americans, and Caucasian Australians) but worse than Chinese, Spanish, and Nigerian populations. It might be possible to relate the difference to genetics, cultural differences, and growth.
正畸需求评估对牙科治疗计划至关重要。本检查的目的是使用牙科美学指数（DAI）评估伊朗设拉子学生的正畸治疗需求，并评估DAI与社会人口统计学变量之间的关系。
采用随机整群抽样方法，选取1818名14至18岁且无正畸治疗史的学生（965名男性和853名女性）。通过问卷收集信息，包括性别、家庭规模和父母教育程度等人口统计学信息。由两名正畸医生在2个月内进行正畸评估。数据采用卡方检验和t检验进行分析。
许多受试者（48.3%）不需要正畸治疗。约五分之一的人群（21%）有严重至致残性错牙合畸形，8.4%有需要强制治疗的致残性错牙合畸形。研究表明性别与错牙合畸形之间存在密切关系。
研究表明，设拉子的伊朗年轻人牙齿外观比一些人群（日本人、白种人和美洲原住民以及澳大利亚白种人）更好，正畸治疗需求更少，但比中国人、西班牙人和尼日利亚人群更差。可能将这种差异归因于遗传、文化差异和生长发育。
