Abstract
This study was conducted to compare the durability of restorations for the primary teeth and the effect of caries prevention on permanent teeth of the recall group with the control group. The recall group was composed of 88 children with 622 dental restorations in the primary molars whose first visit to a dentist was at the age of 1-5 and had regular oral health check-ups until the age of 12.
The control group was composed of 151 children with 1128 dental restorations in the primary molars whose first visit to a dentist was at the age 1-5, and never had regular oral health check-ups until at the age of 12.
1. With the recall group, the percentages of usable restorations in the primary molars of the children were 84.6% after one year,65.7% after two years, and 50.6% after three years. The number decreased to less than 50% in about three years. The control group was 74.1%,48.2%,32.4%, respectively. It was less than 50% after about two years. (chi-square test p<0.01)
2. With the recall group, the average time of dental treatment to place a restoration in a primary molar was 1.81 and at the control group was 2.41. The recall group showed less time required for dental restorations than the control group. (ANOVA p<0.001)
3. With the recall group, the average duration of the first restorations in the primary molars was 3.30years and with the control group was 2.48 years. The recall group had a longer duration for the restorations than the control group. (ANOVA p<0.001)
4. With the recall group, the mean DMF-teeth was 2.39 at 12 years of age, and with the control group was 4.52. The recall group showed lower number of caries teeth than the control group. (ANOVA p<0.001)
These results suggested that the recall system was effective for the durability of the restorations of the primary teeth, and was effective for the prevention of caries of permanent teeth in the dental clinic.
