title: Application of the Periodontal Treatment Need System (PTNS) in a group of Norwegian industrial employees.
mesh_terms: D000328:Adult; D000367:Age Factors; D003365:Costs and Cost Analysis; D003753:Dental Health Surveys; D004468:Economics, Dental; D005260:Female; D006285:Health Planning; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D010517:Periodontics; D011636:Public Health Dentistry; D012737:Sex Factors; D012923:Social Class; D000078329:Workforce