Sjödin B, Matsson L
Postgraduate Dental Education Center, Orebro, Sweden.
J Clin Periodontol. 1994 May;21(5):313-9. doi: 10.1111/j.1600-051x.1994.tb00719.x.
The present study was designed to determine the prevalence of bone loss in the primary dentition of children. Radiographs from children aged 7-9 were collected from 25 out of a total of 26 Public Dental Clinics in the County of Orebro, Sweden. These radiographs, representing 36.0%, 50.3% and 48.7% of all 7-, 8- and 9-year-old children (n = 8666) living in the districts of the participating clinics, constituted a primary sample. In addition, the 9-year-olds were subjected to a more comprehensive sampling procedure to obtain a more complete sample (sample of 9-year-olds), resulting in a group of 2017 children (71.9%). The radiographs were evaluated with respect to presence of marginal bone loss (CEJ-MBL: distance between the cemento-enamel junction and the marginal bone level > 2 mm), proximal calculus and number of decayed and filled proximal surfaces (dfsp) in the posterior areas of the primary dentition. In the primary sample, the prevalence of bone loss for > or = 1 proximal surfaces of the primary dentition in the 7-, 8- and 9-year-old children was 2.0%, 3.1% and 4.5%, respectively. The corresponding figures for proximal calculus were 2.5%, 3.1% and 4.2%. Mean number of dfsp amounted to 2.3, 2.5 and 3.0. The prevalences of bone loss and proximal calculus as well as the mean number of dfsp in the sample of 9-year-olds corresponded to the findings for the 9-year-old children in the primary sample.(ABSTRACT TRUNCATED AT 250 WORDS)
本研究旨在确定儿童乳牙列骨质流失的患病率。从瑞典厄勒布鲁县26家公立牙科诊所中的25家收集了7至9岁儿童的X光片。这些X光片代表了参与诊所所在地区所有7岁、8岁和9岁儿童（n = 8666）的36.0%、50.3%和48.7%，构成了一个初始样本。此外，对9岁儿童采用了更全面的抽样程序以获得更完整的样本（9岁儿童样本），最终得到一组2017名儿童（占71.9%）。对X光片进行了评估，内容包括边缘骨质流失（CEJ - MBL：牙骨质 - 釉质界与边缘骨水平之间的距离>2毫米）、邻面牙石以及乳牙列后部区域的龋坏和充填邻面（dfsp）数量。在初始样本中，7岁、8岁和9岁儿童乳牙列中≥1个邻面骨质流失的患病率分别为2.0%、3.1%和4.5%。邻面牙石的相应数据分别为2.5%、3.1%和4.2%。dfsp的平均数分别为2.3、2.5和3.0。9岁儿童样本中骨质流失和邻面牙石的患病率以及dfsp的平均数与初始样本中9岁儿童的研究结果一致。（摘要截短为250字）
