Abstract
From 1983 to 1985,5195 restorations were performed on the primary teeth of 780 children at the Nagasaki University Dental Clinic of Pediatric Dentistry. Results and conclusions.
1. The average number of the restorations per patient was 6.7 and the highest number shown was 8.5 at three years of age.
2. In a total of 5195 restorations 2025 (39%) were composite-resin restorations,1627 (31.3%) were steel crowns,793 (15.3%) were metal inlays,415 (8%)were amalgam restorations, and 311 (6%) were composite-resin crowns.
3. Primary anterior teeth were restored with the following materials; compositeresin (77.8%), composite-resin crowns (18.2%), steel crowns (2.8%).
4. Primary molars were restored with the following materials; steel crowns (45.3%), metal inlays (22.7%), composite-resin (20%), and amalgam (11.5%).
5. In primary molars 955 restorations included proximal surfaces, and 76.8%of the restorations were metal inlays,15.3% were composite-resin restorations, and 7.4% were amalgam restorations.
6. The rate of the restorations was compared with ages of the patients. Composite-resin restorations were used preferentially for patients under 3years of age and metal inlays and steel crowns were used preferentially for patients over 6 years of age.
7. In the primary teeth which were afflicted with caries extending only to the enamel, composite-resin was used for 98.8% of primary anterior teeth and 74.8% of primary molars.
8. In primary teeth in which caries extended only into the dentin,89.6% were restored with composite-resin in the primary anterior teeth and 35.9% were restored with inlays,27.5% were restored with composite-resin,19.3% were restored with amalgam and 17.3% were restored with steel crowns in the primary molars.
9. In the primary teeth in which caries extended to the pulp,51.2% were restored with composite-resin crowns, and 42.7% were restored with composite-resin in primary anterior teeth, and 92.2% of primary molars were restored with steel crowns.
