TABLE IV.
Postoperative Engagement Length by Implant Number, View, and Side Measured in Subjects Undergoing Sacroiliac Joint Arthrodesis
| Implant Number | View (Side*) | No of Patients | Engagement Length† (mm) |
| 1 (superior) | Axial (anterior) | 64 | 27.3 ± 5.5 (16 to 41) |
| Axial (posterior) | 64 | 23.5 ± 6.1 (5 to 35) | |
| Coronal (superior) | 63 | 27.9 ± 5.2 (15 to 44) | |
| Coronal (inferior) | 63 | 25 ± 5.5 (13 to 42) | |
| 2 | Axial (anterior) | 64 | 19.2 ± 5.3 (9 to 36) |
| Axial (posterior) | 64 | 16 ± 5.2 (4 to 30) | |
| Coronal (superior) | 63 | 18.7 ± 5.1 (7 to 32) | |
| Coronal (inferior) | 63 | 16.3 ± 5 (7 to 28) | |
| 3 | Axial (anterior) | 63 | 16.1 ± 5.7 (5 to 36) |
| Axial (posterior) | 59 | 13.2 ± 5.9 (0 to 26) | |
| Coronal (superior) | 62 | 15.6 ± 5.9 (1 to 33) | |
| Coronal (inferior) | 61 | 14.1 ± 5.6 (0 to 32) | |
| 4 (caudal) | Axial (anterior) | 1 | 11 |
| Axial (posterior) | 1 | 8 | |
| Coronal (superior) | 1 | 10 | |
| Coronal (inferior) | 1 | 7 |
*
The sides are determined as the anterior side of the implant on an axial view, the posterior side of the implant on an axial view, the superior side of the implant on a coronal view, and the inferior side of the implant on a coronal view.
†
The values for implants 1 to 3 are given as the mean and the standard deviation, with the range in parentheses; the values for implant 4 are given as the mean.