Jansson Leif, Lavstedt Stig, Zimmerman Mikael
Department of Periodontology at Skanstull, Folktandvården i Stockholms Iän AB.
Swed Dent J. 2002;26(1):21-9.
The purpose of the study was to assess the degree of marginal alveolar bone loss and tooth loss in a longitudinal study over a period of 20 years. In 1970 a medical and odontological study on a stratified sample of the population of the County of Stockholm aged 18-65 years started. Twenty years later a new odontological investigation was performed on the 513 subjects who wanted to take part once more and who had at least five remaining teeth. The mean distance between the marginal bone level and the cemento-enamel junction measured on the radiographs in 1970 (MBL) was 13.8% of the root length. The mean bone loss during the 20-year period (MBD) was about 10%, corresponding to a mean annual marginal bone loss of about 0.1 mm. The MBD-values were significantly positively correlated to the MBL-values. The mean number of remaining teeth was 24.7 in 1970 and 21.8 in 1990. A significant positive correlation existed between the number of teeth lost between 1970 and 1990 and the mean MBD-value. In stepwise multiple regression analyses, the MBL-value was the only independent variable positively correlated to the MBD-value, while the number of teeth lost between 1970 and 1990 was significantly correlated to age and the MBL-value.
该研究的目的是在一项为期20年的纵向研究中评估牙槽骨边缘吸收程度和牙齿缺失情况。1970年，针对斯德哥尔摩县18至65岁分层抽样人群开展了一项医学和牙科学研究。20年后，对513名愿意再次参与且至少保留了五颗牙齿的受试者进行了新一轮牙科学调查。1970年X线片上测得的边缘骨水平与牙骨质-釉质界之间的平均距离（MBL）为牙根长度的13.8%。20年期间的平均骨吸收量（MBD）约为10%，相当于平均每年边缘骨吸收约0.1毫米。MBD值与MBL值呈显著正相关。1970年平均留存牙齿数为24.7颗，1990年为21.8颗。1970年至1990年期间牙齿缺失数量与平均MBD值之间存在显著正相关。在逐步多元回归分析中，MBL值是与MBD值呈正相关的唯一自变量，而1970年至1990年期间牙齿缺失数量与年龄和MBL值显著相关。
