Effect of the oral examinations in the national health screening program on preventive oral health care and treatments: a 19-year follow-up study

The national health screening (NHS) program in Korea serves as primary prevention by detecting oral diseases early for easier management. Dental scaling helps prevent oral disease and treat early periodontal disease. This study evaluated the effects of national oral examinations (NOE) in NHS on preventive oral hygiene care and dental treatments for a 19-year follow-up study. We conducted a longitudinal observation of Korean adults ≥ 19 years between 2002 and 2003 from the Korean National Health Insurance Service (n = 4,669,107; men = 2,518,704; women = 2,150,403). The independent variable involved tracking the number of people who underwent the NOE recruited between 2002 and 2003 from 2002 to 2013. The dependent variables pertained to the number of dental scaling and the presence or absence of periodontal and dental caries treatments from 2014 to 2020. Individuals receiving 6 to 7 dental scaling during the follow-up exhibited an adjusted odds ratio (AOR) of 2.91 in the NOE-middle (3-4 times) and 3.30 in the NOE-high (5-6 times) (p