Markkanen H, Rajala M, Knuuttila M, Lammi S
J Periodontol. 1981 Feb;52(2):99-103. doi: 10.1902/jop.1981.52.2.99.
The distance from cemento-enamel junction to alveolar crest was studied in relation to periodontal treatment need, socioeconomic factors and dental health. The subjects (315) of the study were employees of a paper mill in Finland. Alveolar crest height was measured from orthopantomograms, periodontal treatment need was assessed by the Periodontal Treatment Need System (PTNS). Number of teeth, interproximal fillings and caries were determined clinically, and background information was obtained by questionnaires. On an average, the rate of alveolar bone loss was 0.6 mm in 10 years in the study population and 1.2 mm in subjects aged 30 to 45 years. The bone loss increased with decreasing number of teeth. Subjects with plaque retention had somewhat more severe bone loss than those with no inflammation or gingival inflammation only. Periodontal treatment need, age and number of remaining teeth altogether explained 42.8% of the bone loss when tested by multiple linear regression analysis.
研究了从牙骨质-釉质界到牙槽嵴的距离与牙周治疗需求、社会经济因素和口腔健康的关系。该研究的对象（315名）是芬兰一家造纸厂的员工。从曲面断层片测量牙槽嵴高度，通过牙周治疗需求系统（PTNS）评估牙周治疗需求。临床确定牙齿数量、邻面充填物和龋齿情况，并通过问卷调查获取背景信息。研究人群中牙槽骨平均每年流失率为0.6mm，30至45岁的受试者为1.2mm。骨流失随牙齿数量减少而增加。有牙菌斑滞留的受试者骨流失比无炎症或仅有牙龈炎症的受试者略严重。经多元线性回归分析，牙周治疗需求、年龄和剩余牙齿数量共同解释了42.8%的骨流失情况。
