Markkanen H, Rajala M, Paunio K
Community Dent Oral Epidemiol. 1983 Feb;11(1):25-32. doi: 10.1111/j.1600-0528.1983.tb01350.x.
A representative sample (n = 8000) was drawn from the population aged 30 years and over, registered as living in Finland. Periodontal disease status was recorded according to the modified Periodontal Treatment Need System (PTNS). Plaque retentions were examined separately. Of the subjects with four or more teeth 3.4% had a healthy periodontal status, while 10.2% of the jaw quadrants were healthy. Plaque retentions were found in 96.6% of the subjects and 90.9% of the jaw segments. Periodontal treatment need was calculated in three ways and was 195 +/- 111 (S.D.) min when the calculation was based on WHO recommendations (1978). Number of teeth, age, sex, caries and filling scores, and education explained about 30% of the treatment need when tested by multiple linear regression analysis.
从芬兰登记在册的30岁及以上人群中抽取了一个代表性样本（n = 8000）。根据改良的牙周治疗需求系统（PTNS）记录牙周疾病状况。分别检查菌斑滞留情况。在有四颗或更多牙齿的受试者中，3.4%的人牙周状况健康，而颌骨象限中有10.2%是健康的。在96.6%的受试者和90.9%的颌骨节段中发现了菌斑滞留。牙周治疗需求通过三种方式计算，当根据世界卫生组织的建议（1978年）进行计算时，为195 +/- 111（标准差）分钟。通过多元线性回归分析测试时，牙齿数量、年龄、性别、龋齿和补牙分数以及教育程度解释了约30%的治疗需求。
