Evaluation of periodontal status by CPITN among (35-44) – year – old population in Khoramabad (2002) Dr. F. Haghighati* - Dr. SH. Salehi** - Dr. R. Valizadeh*** * - Associate Professor of Periodontics Dept. - Faculty of Dentistry – Tehran University of Medical Sciences. **-Assistant Professor of Periodontics Dept. - Faculty of Dentistry – Tehran University of Medical Sciences. ***- Dentist. Background and Aim: The aim of this study was to determine CPITN and its influencing fac-tors among 35 - 44 year old population referred to health centers in Khoramabad. Materials and Methods: In this study, periodontal status of 250 patients, 130 females and 22 males, age ranging from 35-44 years old, were studied using community periodontal index of treatments needs (CPITN). Results: It was indicated that 1.2% of subjects were healthy (code 0), 4.8% had bleeding on probing (code 1), 41.6% had supra or subgingival calculus (code 2), 36.8% had pockets of 4-5 mm depth (code 3) and 15.2% had pockets of 6 mm or more depth (code 4). Conclusion: Periodontal status of younger subjects was better than the older ones. Kruskal wallis and Mann - Whitney tests revealed that there was a significant relationship between age, health status, smoking, and gingival recession with periodontal status, however no significant relationship was found between economic status, improper dental treatment and sex with periodontal status. Treatment needs showed that 98.8% of the subjects required oral hygiene training, 94% required scaling, 15.2% needed complex treatment and 1.2% had no need for treatment. Key words: Periodontal index – Oral health – Oral hygiene - CPITN | 
