Table 2. Relative mean discrepancy of the three fabrication methods (unit: µm, N=10).
| Gap area* | Measurement point | Casting Mean (SD) | Fabrication methods Computer-aided milling Mean (SD) | DMLS Mean (SD) | P value† |
|---|---|---|---|---|---|
| MG | a | 38.36 (8.21)A‡ | 54.46 (24.99)A,B | 71.36 (21.99)B | .004 |
| g | 38.80 (5.10)A | 67.89 (13.77)B | 70.26 (19.85)B | <.001 | |
| 1 | 34.02 (8.86)A | 62.48 (15.61)B | 69.02 (20.41)B | <.001 | |
| 7 | 36.68 (13.46)A | 68.01 (13.92)B | 73.30 (16.07)B | <.001 | |
| avg. | 36.96 (9.23)A | 63.21 (17.89)B | 70.98 (18.99)B | <.001 | |
| CG | b | 42.07 (9.83)A | 68.21 (26.95)B | 88.39 (15.15)B | <.001 |
| f | 45.82 (7.69)A | 70.87 (18.20)B | 86.86 (13.56)C | <.001 | |
| 2 | 44.23 (9.21)A | 66.89 (16.41)B | 87.81 (12.83)C | <.001 | |
| 6 | 50.53 (8.08)A | 74.22 (13.99)B | 87.77 (12.72)C | <.001 | |
| avg. | 45.66 (8.97)A | 70.05 (18.96)B | 87.71 (13.08)C | <.001 | |
| AG | c | 49.27 (9.64)A | 49.27 (21.43)B | 100.66 (20.46)B | <.001 |
| e | 58.53 (16.50)A | 91.34 (13.42)B | 105.79 (16.53)B | <.001 | |
| 3 | 59.81 (10.75)A | 99.72 (19.20)B | 112.52 (18.38)B | <.001 | |
| 5 | 62.13 (10.41)A | 91.58 (10.66)B | 115.37 (25.48)C | <.001 | |
| avg. | 57.44 (12.67)A | 95.12 (16.52)B | 108.58 (20.53)C | <.001 | |
| IG | d | 127.60 (9.54)A | 163.85 (38.25)B | 186.84 (37.60)B | .001 |
| 4 | 128.10 (9.97)A | 166.61 (27.46)B | 189.80 (33.17)B | <.001 | |
| avg. | 127.85 (9.50)A | 165.23 (32.44)B | 188.32 (34.54)C | <.001 | |
| total | 58.28 (31.26)A | 88.86 (39.40)B | 103.27 (43.00)C | <.001 |
* MG: marginal gap, CG: cervical gap, AG: axial wall at internal gap, IG: incisal edge at internal gap.
† By one-way ANOVA.
‡ Different superscript alphabets in the same row represent significant differences at a type-one error rate of 0.05.