Background. Periodontal disease is divide into gingivitis and periodontitis. Gingivitis or gingival inflammation is
reversible form of periodontal disease and most commonly found in the oral cavity. Gingivitis clinnically present
with a changes in color, contour, consistency, texture and gingival bleeding. Risk assessment can identificated the existance of its severity and periodontal disease. Gingival index is one of the indices that used for assessing the severity of gingival inflamation in patient. Public health service Pacar Keling was selected because availability of comprehensive and reliable data on oral disease based on recognised indicators and there’s no epidemiological data on the severity of gingivitis. Purpose. The aim of this study was to measure the severity of gingivitis at the Dental Section of Public Health Service Pacar Keling Surabaya in 2016. Method. The descriptive observational study with simple random sampling method. This study was performed on 100 patients. The indicator that used for this study was the Gingival Index (GI). Results. Females have higher severity of gingivitis than male. The highest
severity of gingivitis of elderly age is in 55-60 years old and subject who had the level of education is in
elementary school, brush their teeth one times a day and never check their teeth to dentist, have a higher tendency of severity on gingivitis.Conclusion. The majority of the patients at the Dental Section of Public Health Service Pacar Keling Surabaya in 2016 had moderate gingivitis based on the score of gingival index
