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The Periodontal Treatment Need System (PTNS) was applied to a group of young Israeli adults, 18-25 years of age, to test the system in the field. A total of 830 persons were examined. Their periodontal treatment needs were assessed. One of the aspects investigated was that of treatment needs according to distribution by sex. Only 2.7% of young adults studied were free of plaque, calculus and gingival inflammation. All the rest (97.3%) needed some kind of periodontal treatment. The time required for treatment needed was also calculated. It was found that on the average 2.4 h per person would be required to deliver the periodontal treatment needs of the group. A close association between sex and PTNS was established in this study.
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Mann et al. (1980) studied this question.
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