Table 3. Wear results of the teeth and their opposing crowns obtained in the reviewed studies.
| Studies | Results, mean wear (s.d.) | |
|---|---|---|
| Occlusal wear of ceramic crowns | Occlusal wear of opposing natural teeth | |
| Suputta-mongkol 2008 | ||
| Wear volume/mm3 | Premolar 0.19 (0.06) | Premolar 0.21 (0.06) |
| Molar 0.34 (0.08) | Molar 0.50 (0.22) | |
| Wear height/µm | Premolar 29 (12) | Premolar 46 (13) |
| Molar 36 (34) | Molar 65 (29) | |
| Etman 2008 | ||
| Procera | ||
| Wear in µm after 6 months | 143.60 (9.47) | 130.96 (15.08) |
| Wear in µm after 12 months | 201.18 (0.22) | 184.24 (15.02) |
| Wear in µm after 18 months | 243.70 (7.31) | 216.84 (14.14) |
| Wear in µm after 24 months | 321.60 (12.79) | 261.58 (12.88) |
| Experimental ceramic | ||
| Wear in µm after 6 months | 108.50 (4.87) | 102.02 (8.49) |
| Wear in µm after 12 months | 148.16 (6.38) | 149.7 (6.59) |
| Wear in µm after 18 months | 194.18 (11.92) | 193.92 (12.07) |
| Wear in µm after 24 months | 214.76 (4.9) | 214.86 (6.09) |
| MC | ||
| Wear in µm after 6 months | 87.06 (2.96) | 75.52 (7.15) |
| Wear in µm after 12 months | 116.3 (4.70) | 106.9 (10.19) |
| Wear in µm after 18 months | 142.30 (3.91) | 133.82 (6.94) |
| Wear in µm after 24 months | 176 (3.93) | 156.42 (14.34) |
| Silva 2011 (at year 3 in mm3) | ||
| MC | 1.48 (0.20) | 1.10 (0.10) |
| IPS e.max Press without veneering | 1.06 (0.12) | 0.80 (0.09) |
| IPS Empress 2/IPS Eris ceramic | 1.31 (0.17) | 1.02 (0.20) |
s.d., standard deviation.