Hix J O, O'Leary T J
J Periodontol. 1976 Jul;47(7):398-404. doi: 10.1902/jop.1976.47.7.398.
Two groups of patients were evaluated for the presence of active, restored, and recurrent root surface caries. One group of 120 subjects had received treatment for moderate to severe periodontitis. The second group consisted of 124 subjects who were affected by moderate to severe periodontitis but had received no treatment. The two groups were also evaluated for amounts of recession, pocket depth, and the presence of bacterial plaque. In addition, each subject was asked to compile a record of his/her dietary intake for a seven-day period. The treated group was found to brush and floss more frequently than the untreated group and had a lower mean plaque score (45.8), than the untreated group (61.4). There was no difference in the mean plaque scores for the subgroups with and without root surface caries within either the treated groups. The prevalence of root surface caries increased through age 59 in the treated group, then diminished after age 60. In the untreated group the prevalence increased steadily with age. Analysis of the data from the dietary hisories revealed that the subjects in both the treated and the untreated groups who were affected with root surface caries had a significantly higher (P less than 0.01) number of fermentable carbohydrate exposures per week.
对两组患者进行了活动性、已修复和复发性根面龋的评估。一组120名受试者接受了中度至重度牙周炎的治疗。第二组由124名患有中度至重度牙周炎但未接受治疗的受试者组成。还对两组的牙龈退缩量、牙周袋深度和牙菌斑的存在情况进行了评估。此外，要求每位受试者记录其七天的饮食摄入量。结果发现，治疗组比未治疗组更频繁地刷牙和使用牙线，且平均菌斑评分（45.8）低于未治疗组（61.4）。在治疗组中，有根面龋和无根面龋的亚组的平均菌斑评分没有差异。治疗组中根面龋的患病率在59岁之前上升，然后在60岁之后下降。在未治疗组中，患病率随年龄稳步上升。对饮食记录数据的分析显示，治疗组和未治疗组中患有根面龋的受试者每周可发酵碳水化合物的摄入量显著更高（P<0.01）。
