Basic Study
Copyright ©The Author(s) 2018.
World J Orthop. Mar 18, 2018; 9(3): 14-23
Published online Mar 18, 2018. doi: 10.5312/wjo.v9.i3.14
Table 6 Change in sacroiliac joint axial rotation range of motion (°) as a result of reducing the number of implants
TreatmentImplants (positions)Superior implant ending pointRange of motionMotion increase (°)% 3 implant motion
Intact-11.11--
Inline3 (S, M, I)Mid-ala0.41Reference configuration
Inline2 (S, M, -)Mid-ala0.490.0820
Inline2 (S, -, I)Mid-ala0.440.037
Inline2 (-, M, I)10.550.1434
Inline1 (S, -, -)Mid-ala0.670.2663
Inline1 (-, M, -)10.730.3278
Inline1 (-, -, I)10.790.3893
Inline3 (S, M, I)Mid-sacrum0.38Reference configuration
Inline2 (S, M, -)Mid-sacrum0.430.0513
Inline2 (S, -, I)Mid-sacrum0.40.025
Inline1 (S, -, -)Mid-sacrum0.610.2361
Transarticular3 (S, M, I)Mid-ala0.34Reference configuration
Transarticular2 (S, M, -)Mid-ala0.40.0618
Transarticular2 (S, -, I)Mid-ala0.360.026
Transarticular2 (-, M, I)10.460.1235
Transarticular1 (S, -, -)Mid-ala0.670.3397
Transarticular1 (-, M, -)10.70.36106
Transarticular1 (-, -, I)10.730.39115
Transarticular3 (S, M, I)Mid-sacrum0.31Reference configuration
Transarticular2 (S, M, -)Mid-sacrum0.350.0413
Transarticular2 (S, -, I)Mid-sacrum0.320.013
Transarticular1 (S, -, -)Mid-sacrum0.610.397
TreatmentImplants (positions)Superior implant ending point% 3 Implant motionImplants (positions)Median (%) [range]
Inline2 (S, -, I)Mid-ala72 (S, -, I)5.5% (3-7)
Inline2 (S, -, I)Mid-sacrum5
Transarticular2 (S, -, I)Mid-ala6
Transarticular2 (S, -, I)Mid-sacrum3
Inline2 (S, M, -)Mid-ala202 (S, M, -)15.5% (13-20)
Inline2 (S, M, -)Mid-sacrum13
Transarticular2 (S, M, -)Mid-ala18
Transarticular2 (S, M, -)Mid-sacrum13
Inline2 (-, M, I)1342 (-, M, I)34.5% (34-35)
Transarticular2 (-, M, I)135
Inline1 (S, -, -)Mid-ala631 (S, -, -)80% (61-97)
Inline1 (S, -, -)Mid-sacrum61
Transarticular1 (S, -, -)Mid-ala97
Transarticular1 (S, -, -)Mid-sacrum97
Inline1 (-, M, -)1781 (-, M, -)92% (78-106)
Transarticular1 (-, M, -)1106
Inline1 (-, -, I)1931 (-, -, I)104% (93-115)
Transarticular1 (-, -, I)1115