Stermer Beyer-Olsen E M, Bjertness E, Eriksen H M, Hansen B F
Department of Oral Radiology, Dental Faculty, University of Oslo, Norway.
Community Dent Oral Epidemiol. 1989 Apr;17(2):68-70. doi: 10.1111/j.1600-0528.1989.tb00590.x.
The purpose of the present study was to evaluate a variety of radiographically detectable conditions found on orthopantomograms of 141 individuals as a part of an oral health survey of 35-year-old Oslo citizens, born 1949. Radiographic findings were recorded and compared with those of a similar study made in 1973. The findings revealed a statistically significant reduction in the prevalence of marginal bone loss. The frequencies of endodontically treated teeth and teeth with apical radiolucencies were unchanged.
本研究的目的是评估141名个体的曲面断层片上发现的各种影像学可检测情况，这些个体是1949年出生的35岁奥斯陆市民口腔健康调查的一部分。记录影像学检查结果，并与1973年进行的一项类似研究的结果进行比较。结果显示边缘性骨丧失的患病率有统计学意义的降低。接受过根管治疗的牙齿和根尖有透射区的牙齿的频率没有变化。
