Clinical Study on the Restorations of the Permanent Teeth

From 1983 to 1985,1415 restorations were performed on the permanent teeth of 371 children at the Nagasaki University Dental Clinic of Pediatric Dentistry. Results and conclusions. 1. The average number of restorations per patient was 3.8 and the higher the age of the patients, the more the number of the restorations. 2. In a total of 1415 restorations,728 (51.4%) were composite-resin restorations,309 (21.8%) were metal inlays,285 (20.1%) were amalgam restorations,26(1.8%) were steel crowns,23 (1.6%) were composite-resin crowns, and 19(1.3%) were metal onlays. 3. Of the anterior teeth 85.8% were restored with composite-resin. 4. Molars and premolars were restored with following materials; compositeresin (44.2%), metal inlays (26.4%), and amalgam (23.8%). 5. Of the molars and premolars 193 restorations included proximal surfaces, and 71% of the restorations were metal inlays,15% were composite-resin restorations,8.3% were metal onlays, and 5.7% were amalgam restorations. 6. For the teeth which were afflicted with caries extending only to the enamel, composite-resin was used for 100% of anterior teeth and 92.7% of molars and premolars. 7. For the teeth in which caries extended only into the dentin,90.1%, of anterior teeth were restored with composite-resin and 37.3% were restored with compositeresin,30.4% were restored with amalgam, and 30% were restored with metal inlays in molars and premolars. 8. For the teeth in which caries extended to the pulp,60.7% were restored with composite-resin, and 35.7% were restored with composite-resin crowns in the anterior teeth and 34.7% were restored with metal inlays,20.4% were restored with composite-resin in the molars and premolars. 9. For the teeth in which most of the tooth crown was destroyed by caries,66.7%of the anterior teeth were restored with pivot crowns and all the molars and premolars were restored with steel crowns.