Hujoel Philippe, Hollender Lars, Bollen Anne-Marie, Young John D, McGee Molly, Grosso Alex
Department of Dental Public Health Sciences, University of Washington, School of Dentistry, Box 357475, Seattle, WA 98195, USA.
J Dent Educ. 2006 Oct;70(10):1061-5.
Obtaining lifetime diagnostic radiation histories in head and neck cancer studies is often challenging due to the almost universal lack of centralized registries on X-ray utilization in medicine and dentistry. Both the common nature of orthodontics and the young age at which orthodontics typically occurs make it important to quantify what diagnostic radiographs are typically taken during orthodontic therapy. The aim of this study was to assess the number and type of radiographic films associated with one episode of orthodontic therapy in an educational setting. Charts stored in an orthodontic clinic at one academic setting were randomly sampled, and the type and number of radiographic examinations were tallied for the 325 individuals who were in orthodontic therapy for at least one year. Being under orthodontic therapy for one or more years was associated with a median number of seven extra-oral radiographs and twenty-four intra-oral radiographic films. The extra-oral radiographs included three panoramic radiographs and three cephalometric radiographs. Less than 10 percent of the variability was explained by factors such as age, gender, calendar year, surgical orthodontic therapy, and duration of therapy. Head and neck cancer etiology studies should take into account the ionizing radiation during episodes of orthodontic care. The substantial variability in radiographic practices in orthodontics could be reduced by research into clinical utility and by establishing guidelines.
在头颈癌研究中获取终生诊断性放射史往往具有挑战性，因为医学和牙科领域几乎普遍缺乏关于X射线使用情况的集中登记系统。正畸治疗的普遍性以及正畸治疗通常在患者年轻时进行，这使得量化正畸治疗期间通常会拍摄哪些诊断性X光片变得很重要。本研究的目的是评估在教育环境中与一次正畸治疗相关的X光片的数量和类型。在一个学术机构的正畸诊所随机抽取病历，统计325名接受正畸治疗至少一年的患者的X光检查类型和数量。接受正畸治疗一年或更长时间的患者平均拍摄了七张口腔外X光片和二十四张口腔内X光片。口腔外X光片包括三张全景X光片和三张头影测量X光片。年龄、性别、年份、外科正畸治疗以及治疗持续时间等因素对X光片数量差异的解释不到10%。头颈癌病因学研究应考虑正畸治疗期间的电离辐射。通过研究临床实用性并制定指南，可以减少正畸治疗中X光片使用的显著差异。
