Abstract
This study is an investigation of the state of dental restorations in 1750 primary molars among 239children aged between one and five. The study also analyzes the data comparing three groups. Group 1 was composed of children whose first visit to a dentist in his/her life was at the age of one or two; Group 2 was composed of children who visited a dentist for the first time when they were three years old; Group 3 was composed of children who visited a dentist for the first time when they were four or five years old.
1. The percentages of usable restorations in the primary molars of the children were 92.8% after half a year,77.0% after a year,55.1% after two years,45.9% after two and a half years. The number decreased to less than 50% between two and two and a half years.
2. The lower the age of a child who went to see a dentist for the first time in his/her life, the shorter the life of the restorations.
3. The average time of dental treatment to place a restoration in a primary molar was 2.19. The average times of dental treatment to restore a tooth was 2.67 in Group 1,2.28 in Group 2, and 1.76 in Group 3. The younger a child who visits a dentist for the first time is, the more times he has dental restorations. (ANOVA p<0.01)
4. The average duration of the first restorations in primary molars was 2.78 years. The number of the year is 2.51 in Group 1,2.64 in Group 2, and 3.09 in Group 3. The younger a child who visits a dentist is, the shorter the duration of the restorations is. (ANOVA p<0.05)
Results of the restorations in primary molar is of very short durability, so we should pay more attention to prevention the secondary caries of the restorations as well as new dental caries by a recall system at the dental clinic.
