Table 2. Comparisons of material, in-fill, and shell*.
ABS: Acrylonitrile butadiene styrene; APO: Axial pullout; IT: Insertional torque; PLA: Polylactic acid; ST: Stiffness.
*Values are mean (SD) unless indicated otherwise.
| Variable | IT (Nm) | APO (N) | ST (N/mm) |
| Material | |||
| ABS (n = 12) | 0.96 (0.10) | 1104 (218) | 830 (128) |
| Nylon (n = 12) | 0.45 (0.09) | 223 (103) | 182 (102) |
| PLA (n = 12) | 1.39 (0.20) | 2713 (684) | 1034 (106) |
| P value | .001 | .001 | .001 |
| Material percent fill | |||
| ABS | |||
| ABS 25 (n = 4) | 0.88 (0.09) | 854 (95) | 702 (52) |
| ABS 30 (n = 4) | 0.97 (0.07) | 1187 (139) | 843 (110) |
| ABS 35 (n = 4) | 1.03 (0.09) | 1271 (129) | 946 (76) |
| P value | .10 | .002 | .008 |
| Nylon | |||
| Nylon 25 (n = 4) | 0.40 (0.13) | 285 (146 | 237 (135) |
| Nylon 30 (n = 4) | 0.47 (0.02) | 152 (16) | 105 (20) |
| Nylon 35 (n = 4) | 0.49 (0.07) | 233 (75) | 204 (83) |
| P value | .28 | .20 | .17 |
| PLA | |||
| PLA 25 (n = 4) | 1.19 (0.10) | 1966 (226) | 954 (124) |
| PLA 30 (n = 4) | 1.35 (0.07) | 2803 (442) | 1101 (86) |
| PLA 35 (n = 4) | 1.63 (0.06) | 3371 (374) | 1047 (59) |
| P value | .001 | .001 | .14 |
| Material thickness | |||
| ABS | |||
| ABS 4 (n = 6) | 0.95 (0.06) | 1060 (193) | 808 (125) |
| ABS 8 (n = 6) | 0.97 (0.13) | 1148 (250) | 852 (139) |
| P value | .73 | .51 | .58 |
| Nylon | |||
| Nylon 4 (n = 6) | 0.44 (0.12) | 281 (122) | 238 (119) |
| Nylon 8 (n = 6) | 0.47 (0.05) | 166 (24) | 126 (33) |
| P value | .53 | .047 | .07 |
| PLA | |||
| PLA 4 (n = 6) | 1.36 (0.22) | 2435 (578) | .991 (112) |
| PLA 8 (n = 6) | 1.42 (0.20) | 2992 (714) | 1077 (87) |
| P value | .62 | .17 | .17 |