Table 3. Distribution of the dental materials used to restore primary caries by restoration class type.
| Restoration Class | Amalgam | RBC | IRBC | GI/ RMGI | Ceramic | Cast Gold | Metal | Temporary | Multiple | Total |
|---|---|---|---|---|---|---|---|---|---|---|
| Class I [N (%)] | 938 (36.3) | 1569 (60.7) | 2 (0.08) | 51 (2.0) | 0 | 0 | 3(0.1) | 4 (0.15) | 18 (0.7) | 2585 (100) |
| Class II [N (%)] | 1780 (56.5) | 1189 (37.7) | 1 (0.03) | 67 (2.1) | 5 (0.16) | 5 (0.16) | 22 (0.7) | 43 (1.4) | 39 (1.3) | 3151 (100) |
| Class III [N (%)] | 24 (2.6) | 856 (92.4) | 0 | 35 (3.8) | 0 | 0 | 3 (0.3) | 3 (0.3) | 5 (0.6) | 926 (100) |
| Class IV [N (%)] | 2 (1.4) | 132 (93.6) | 0 | 5 (3.5) | 1 (0.7) | 0 | 0 | 1 (0.7) | 0 | 141 (100) |
| Class V [N (%)] | 374 (28) | 844 (63.0) | 2 (0.2) | 87 (6.5) | 0 | 2 (0.2) | 5 (0.4) | 5 (0.4) | 18 (1.3) | 1337 (100) |
| Total [N (%)] | 3118 (38.0) | 4590 (56.4) | 5 (0.1) | 245 (3.0) | 6 (0.1) | 7 (0.1) | 33 (0.4) | 56 (0.7) | 80 (1.0) | 8140 (100) |
Directly placed resin-based composite: RBC; indirectly placed resin-based composite: IRBC; glass-ionomer or resin-modified glass-ionomer: GI/ RMGI; ceramic: ceramic or porcelain; cast gold: cast gold or other metallic-based material; metal: combined metal-ceramic material; temporary: temporary restorative material; multiple: combination of multiple materials. Of the 8,351 restorations inserted due to primary caries, a total of 8,140 restorations were recorded with data on the use of dental materials by restoration class. Percentages are within rows for each restoration class.