PREVENTIVE PROGRAM OF PERIODONTITIS BY RISK FACTOR

（目的）对农村地区486人（1444岁，211名男性，276名女性）的牙周状况进行了为期2年的监测，以确定作为依恋丧失危险因素的临床参数。（方法）分别于1992年和1994年对每个人的两个象限的牙菌斑和牙石积累（PSS和CI）、改良牙龈指数（MGI）、牙袋深度（PD）和附着水平（AL）进行检测。计算这些参数的平均值，统计分析3年期间各临床参数的变化，分析依恋丧失与临床参数的关系。（结果）研究开始时，人的PSS平均值为3.50，CI为2.21，MGI为1.53，PD为2.58 mm， AL为1.64 mm， PD和AL的平均值有随年龄增长而增加的趋势。在纵向分析中，PSS、CI和PD没有变化，但AL有增加的趋势。（结论）依恋丧失随年龄增长而增加，尤其是25岁以后。深度牙周袋（PD≧4mm）与附着丧失进展相关。

(Objectives) The periodontal condition of 486 persons (1444 years old, 211 males and 276 females) in a rural area was monitored over a 2 year period in order to determine the clinical parameters that act as risk factors for attachment loss.(Methods) Plaque and calculus accumulation (PSS and CI), modified gingival index (MGI), pocket depth (PD) and attachment level(AL) of two quadrants of each person were examined in 1992 and 1994. Following calculation of the mean of each of these parameters and statistical analysis of the change in each of the clinical parameters over the 3 year period, the relationship between attachment loss and clinical parameters was analyzed.(Results) At the beginning of this study, the mean values for persons were 3.50 for PSS, 2.21 for CI, 1.53 for MGI, 2.58 mm for PD, 1.64 mm for AL. The mean of PD and AL tended to increase with age.On the longitudinal analysis, PSS, CI and PD was no changed but AL was tended to increase.(Conclusion) Attachment loss lended to increase with age, especially after 25 years old. Deep periodontal pocket (PD≧4mm) correlated with progression of attachment loss.