Megalamanegowdru Jayachandra, Ankola Anil V, Vathar Jagadishchandra, Vishwakarma Prashanthkumar, Dhanappa Kirankumar B, Balappanavar Aswini Y
Department of Public Health Dentistry, Bapuji Dental College and Hospital, Davangere, Karnataka 577005, India.
Oral Health Prev Dent. 2012;10(2):175-83.
To assess and compare the periodontal health status among permanent residents of low, optimum and high fluoride areas in Kolar District, India.
A house-to-house survey was conducted in a population consisting of 925 permanent residents aged 35 to 44 years in three villages having different levels of fluoride concentrations in the drinking water. The fluoride concentrations in selected villages were 0.48 ppm (low), 1.03 ppm (optimum) and 3.21 ppm (high). The ion selective electrode method was used to estimate the fluoride concentration in the drinking water. Periodontal status was assessed using the Community Periodontal Index (CPI) and loss of attachment (LOA). Results were analysed using the chi-square test and logistic regression. The chi-square test was used to find the group differences and logistic regression to find association between the variables.
The overall prevalence of periodontitis was 72.9%; specifically, prevalences were 95.4%, 76.3% and 45.7% in low, optimum and high fluoride areas, respectively. The number of sextants with shallow or deep pockets decreased (shallow pockets: 525, 438, 217; deep pockets: 183, 81, 34) from low to high fluoride areas (odds ratio: 71.3). The low fluoride area had a 7.9-fold higher risk of periodontitis than the optimum fluoride area and a 30-fold higher risk than the high fluoride area, which was highly significant (χ2 = 53.5, P < 0.0001 and χ2 = 192.8, P < 0.001, respectively).
The severity of periodontal disease is inversely associated with the fluoride concentrations in drinking water. This relation can provide an approach to fluoride treatments to reduce the prevalence or incidence of this disease.
评估并比较印度科拉尔区低氟、适宜氟和高氟地区常住居民的牙周健康状况。
在三个饮用水氟浓度不同的村庄，对925名年龄在35至44岁的常住居民进行逐户调查。所选村庄的氟浓度分别为0.48 ppm（低）、1.03 ppm（适宜）和3.21 ppm（高）。采用离子选择电极法估算饮用水中的氟浓度。使用社区牙周指数（CPI）和附着丧失（LOA）评估牙周状况。结果采用卡方检验和逻辑回归进行分析。卡方检验用于发现组间差异，逻辑回归用于发现变量之间的关联。
牙周炎的总体患病率为72.9%；具体而言，低氟、适宜氟和高氟地区的患病率分别为95.4%、76.3%和45.7%。从低氟地区到高氟地区，有浅袋或深袋的牙面数量减少（浅袋：525、438、217；深袋：183、81、34）（优势比：71.3）。低氟地区患牙周炎的风险比适宜氟地区高7.9倍，比高氟地区高30倍，差异具有高度显著性（χ2 = 53.5，P < 0.0001；χ2 = 192.8，P < 0.001）。
牙周疾病的严重程度与饮用水中的氟浓度呈负相关。这种关系可为氟治疗提供一种方法，以降低该疾病的患病率或发病率。
