Periodic oral examination must be accomplished in elementary and high schools in every year, but many problemes happened to be checked out. So, the author questionnaired problem to school nurses about the periodic oral examination. The obtained results were as follows: 1. It took about 24 seconds per child to examine oral status. 2. It was revealed that school nurses could not be able to accomplish reporting about the children's oral health status. 3. generally speaking, school nurses had affirmative views about the periodic oral examination. 4. It was needed that incremental dental care system was operated for school children. 5. It was concluded that school dental health with man-power problem was dealt on the government level.

The effect of insulin on the collagen metabolism in dental pulp and gingiva was studied using Sprague-Dawley rat and ³H-proline was injected intraperitoneally and then sacrificed according to predetermined schedule. Lower incisor pulp and gingiva were removed immediatedly and hydrolysed with acid. After digestion, proline and hydroxyproline were separated and analysed quantitatively employing thin-layer chromatography and radioactivity of each amino acid was counted by liquid scintillation counter. The label incorporated into lower incisor pulp and gingiva and radioactivity of ³H-hydroxyproline were increased in insulin administered group. And disappearance rate of ³H-hydroxyproline was decreased. Those results indicated that amino acid, I.e. proline transport and collagen biosynthesis were increased in dental pulp and gingiva by insulin administration.

In order to collect the basic data for planning school dental health programmes, the author had examined dental health conditions of 120 males and 120 females of Changgyung Primary School children in the first grade. The percentages of persons with conditions requiring immediate attention, toothbrushing times and daily frequency, df rate, df index, dt index, ft index, it index, DMF rate, DT index, MT index, FT index, IT index, DMFT index, percentages of persons with periodontal status in every of the four categories with soft deposits, calculus, intense gingivitis, and advanced periodontal involvement were calculated and evaluated. The obtained results were as follows: 1. Persons with requiring immediate attention was 7.1% of all the examined children. 2. The df rate was 88.3%, and df index was 3.4 teeth per person. And then the DMF rate was 17.1%, while DMFT index was 0.3 teeth per person. 3. As the periodontal status, the persons with soft deposits was 90.0% of children, calculus 26.3%, intense gingivitis 0.4%, and no advanced periodontal involvement. 4. Average toothbrushing frquency was 1.2 times in a day per person. But 71.5% of toothbrushing was performed before meals, while the others after meals.