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 5 Change in sacroiliac joint lateral bending range of motion (°) as a result of reducing the number of implants
TreatmentImplants (positions)Superior implant ending pointRange of motion (°)Motion increase (°)% 3 implant motion
Intact--10.66--
Inline3 (S, M, I)Mid-ala0.45Reference configuration
Inline2 (S, M, -)Mid-ala0.50.0511
Inline2 (S, -, I)Mid-ala0.470.024
Inline2 (-, M, I)-10.530.0818
Inline1 (S, -, -)Mid-ala0.580.1329
Inline1 (-, M, -)-10.650.244
Inline1 (-, -, I)-10.690.2453
Inline3 (S, M, I)Mid-sacrum0.41Reference configuration
Inline2 (S, M, -)Mid-sacrum0.450.0410
Inline2 (S, -, I)Mid-sacrum0.430.025
Inline1 (S, -, -)Mid-sacrum0.580.1741
Transarticular3 (S, M, I)Mid-ala0.41Reference configuration
Transarticular2 (S, M, -)Mid-ala0.450.0410
Transarticular2 (S, -, I)Mid-ala0.420.012
Transarticular2 (-, M, I)-10.470.0615
Transarticular1 (S, -, -)Mid-ala0.580.1741
Transarticular1 (-, M, -)-10.60.1946
Transarticular1 (-, -, I)-10.620.2151
Transarticular3 (S, M, I)Mid-sacrum0.38Reference configuration
Transarticular2 (S, M, -)Mid-sacrum0.410.038
Transarticular2 (S, -, I)Mid-sacrum0.390.013
Transarticular1 (S, -, -)Mid-sacrum0.580.253
TreatmentImplants (positions)Superior implant ending point% 3 Implant motionImplants (positions)Median (%) [range]
Inline2 (S, -, I)Mid-ala42 (S, -, I)3.5% (2-5)
Inline2 (S, -, I)Mid-sacrum5
Transarticular2 (S, -, I)Mid-ala2
Transarticular2 (S, -, I)Mid-sacrum3
Inline2 (S, M, -)Mid-ala112 (S, M, -)10% (8-11)
Inline2 (S, M, -)Mid-sacrum10
Transarticular2 (S, M, -)Mid-ala10
Transarticular2 (S, M, -)Mid-sacrum8
Inline2 (-, M, I)-1182 (-, M, I)16.5% (15-18)
Transarticular2 (-, M, I)-115
Inline1 (S, -, -)Mid-ala291 (S, -, -)41% (29-53)
Inline1 (S, -, -)Mid-sacrum41
Transarticular1 (S, -, -)Mid-ala41
Transarticular1 (S, -, -)Mid-sacrum53
Inline1 (-, M, -)-1441 (-, M, -)45% (44-46)
Transarticular1 (-, M, -)-146
Inline1 (-, -, I)-1531 (-, -, I)52% (51-53)
Transarticular1 (-, -, I)-151