Swan E S, Lewis D W
Dental Treatment Services 3 (DDTS 3), Canadian Forces Dental Services Headquarters, Ottawa.
J Can Dent Assoc. 1993 Jan;59(1):76-9.
In February 1991, a mail survey was used to poll a sample consisting of about 10 per cent of Ontario's general dentists. The data obtained provided information about the radiographs prescribed by dentists for five different patient types, which were described to the respondents. The per cent agreement between the radiographic procedures prescribed by Ontario dentists and the ADA-approved Center for Devices and Radiological Health (CDRH) guidelines ranged from three per cent to 79 per cent, depending on patient type and disease risk. For each patient and risk type, there was considerable variation in the radiographs prescribed.
1991年2月，通过邮件调查对安大略省约10%的普通牙医样本进行了民意调查。所获得的数据提供了有关牙医为五种不同患者类型开具的X光片的信息，这些患者类型已向受访者进行了描述。安大略省牙医开具的X光检查程序与美国牙科协会认可的设备与放射健康中心（CDRH）指南之间的一致率在3%至79%之间，具体取决于患者类型和疾病风险。对于每种患者和风险类型，所开具的X光片存在相当大的差异。
