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Int Dent J. 2000 Oct;50(5):267-73. doi: 10.1111/j.1875-595x.2000.tb00564.x.
To identify the reasons for tooth extraction in Recife, Brazil and to test whether they differ by socio-economic groups and levels of caries experience.
Cross-sectional survey.
Ten health centres of the public health system and ten health centres of insurance companies.
Patients attending health centres.
Ten dentists from each selected centre and two patients from each selected dentist were randomly selected from; the list of all health centres in Recife, all dentists carrying out dental extractions at each selected centre and all patients who had an appointment with the selected dentists respectively. Participants were examined by both the researcher (AC) and dentists.
Reasons for tooth extraction.
Of the 404 teeth extracted, 70.3 per cent were because of caries and its sequelae; 15.1 per cent because of periodontal disease; 6.4 per cent for pre-prosthetic reasons; 3.7 per cent wisdom teeth, 2.5 per cent for orthodontic reasons and 1 per cent for trauma and patient's request. A trend was observed for patients with less than secondary school education and lower salaries to have more tooth extraction due to caries, but the differences were not of statistical significance.
确定巴西累西腓拔牙的原因，并检验这些原因是否因社会经济群体和龋齿经历水平而异。
横断面调查。
公共卫生系统的10个健康中心和保险公司的10个健康中心。
前往健康中心就诊的患者。
分别从累西腓所有健康中心名单、每个选定中心进行拔牙的所有牙医名单以及与选定牙医预约的所有患者名单中，随机抽取每个选定中心的10名牙医和每位选定牙医的2名患者。参与者由研究人员（AC）和牙医进行检查。
拔牙原因。
在拔除的404颗牙齿中，70.3%是由于龋齿及其后遗症；15.1%是由于牙周病；6.4%是出于修复前的原因；3.7%是智齿，2.5%是出于正畸原因，1%是由于外伤和患者要求。观察到受教育程度低于中学且收入较低的患者因龋齿拔牙的情况更多，但差异无统计学意义。
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