Markkanen H
Community Dent Oral Epidemiol. 1978 Sep;6(5):240-4. doi: 10.1111/j.1600-0528.1978.tb01158.x.
A periodontal study was conducted in a paper mill in Finland. To adapt the Periodontal Treatment Need System (PTNS) to a Finnish adult population the estimates of Finnish periodontologists were used. The mean estimate of periodontal treatment need was 97 +/- 58 (s.d.) min per person and 32 +/- 18 min per jaw segment. Periodontal treatment need increased with age. No significant differences in periodontal treatment need by sex, education, type of employment, regularity of working hours or frequency of dental visits were observed. Adjusted family income and toothbrushing frequency did not produce significant differences in periodontal treatment need, except in the group having four dentulous jaw segments. The groups using sugar, other sweetening agents or neither of these, mainly in coffee or tea, differed significantly: the non-users of sugar had lowest treatment time and those who used other sweetening agents than sugar had highest treatment time.
在芬兰的一家造纸厂进行了一项牙周病研究。为使牙周治疗需求系统（PTNS）适用于芬兰成年人群，采用了芬兰牙周病专家的评估结果。牙周治疗需求的平均评估值为每人97±58（标准差）分钟，每颌段为32±18分钟。牙周治疗需求随年龄增长而增加。未观察到按性别、教育程度、就业类型、工作时间规律或看牙频率划分的牙周治疗需求有显著差异。调整后的家庭收入和刷牙频率在牙周治疗需求方面未产生显著差异，但在有四个牙列颌段的组中除外。主要在咖啡或茶中使用糖、其他甜味剂或两者都不使用的组存在显著差异：不使用糖的组治疗时间最短，使用除糖以外其他甜味剂的组治疗时间最长。
