根面龋临床观察与分析（附197例）

根面龋是老年人常见的口腔病，我们对口腔门诊40－85岁197例患者进行调查，发现患根面龋人数14例，根龋发病率57＝．87％，中，老年人发病率有高度显著性差异（P＜0．01），男女发病率差异无显著性（P＞0．05），与国内有些报道相异，根龋指数RCI为0．26，受检患者根龋发病率，RCI值与年龄呈正相关，但40－49岁年龄组RCI数据高于50－59岁组，调查发现，牙龈退缩与根面龋密切相关，根发生率最多的牙位是下磨牙，最少的是下前牙。

CLINICAL OBSERVING AND ANALYSES OF ROOT-CARIES(197 CASES)

Root-caries is the disease which is often occured in old people.We investigated 197 patients(40～85 years old) in stomatological clinic,and found that there were 114 patients who had root-caries,an the incidence of root-caries is 57.87 percent.There was a significantly different in incidence between middle-aged people and old ones(P＜0.01),and no significantly diferent in incidence between men and women(P＞0.05).This conclusion is different from some domestic reports.Root-Caries Index (RCI) is 0.26.The incidecnce of root-caries and value of RCI are directly proportionate with age,but value of RCI in group of 40～49 years old is higher than it in the group of 50～59 years old.Gingival atrophy is relate to root-caries closely.Root-caries is mostly occurred in mandibular molar teeth,and is seldom seen in mandibular front teeth.