Table 3.
Comparison of visual shade matching overall and among different thirds of PFM (porcelain fused to metal) crowns fabricated by different laboratories.
| Visual Shade Matching, Cervical 3rd | ||||
|---|---|---|---|---|
| Accuracy of Shade, Criteria-Based Evaluation. | Government LABs (N and Row %) |
Commercial LABs (N and Row %) |
Total (N and Column %) |
p Value |
| Matching | 8 (40) | 12 (60) | 20(62.5) | 0.273 |
| Non-Matching | 8 (66.6) | 4 (33.4) | 12 (37.5) | |
| Visual Shade Matching, Middle Third | ||||
| Matching | 12 (50) | 12 (50) | 24 (75) | 1.0 |
| Non-Matching | 4 (50) | 4 (50) | 8 (25) | |
| Visual Shade Matching, Incisal Thid | ||||
| Matching | 3 (21.5) | 11 (78.5) | 14 (43.7) | 0.004 |
| Non-Matching | 13 (72.3) | 5 (27.7) | 18 (56.3) | |
| Overall Visual Shade Matching (All Thirds) | ||||
| Complete Matching | 1 (12.5) | 7 (87.5) | 8 (25) | 0.005 |
| 2/3rd matching | 11 (61.2) | 7 (38.8) | 18 (56.25) | |
| 1/3rd matching | 0 (0) | 2 (100) | 2 (6.25) | |
| None matching | 4 (100) | 0 (0) | 4 (12.5) | |