Outcome | Illustrative comparative risks | No of participants (studies) | |
---|---|---|---|
Assumed risk | Corresponding risk (95% CI) | ||
Aperture coronal plane position as % of scaling dimension | |||
a. Perpendicular to BL Quadrant method | Â | Â | Â |
On CT On radiograph Heming method on tunnel radiograph Sommer method on tunnel radiograph | 24% 16.3% 61.7° 0%, 17%, and 83% in Zone D, A, and B, respectively | 11.3% lower position (8% lower: 14.6 lower) 4.45% lower position (1.9% lower to 7% lower) 5.8° lower (7.75° lower to 3.9° lower) 17%, 48%, and 34% in Zone D, A, and B, respectively | 1070 (16 studiesa) 102 (2 studiesb) 105 (1 study) 105 (1 study) |
b. Along AP axis Anatomic coordinate axis method on CT | Â | Â | Â |
Clock face method On specimen On MRI Heming method on axial CT | 56.2% 25.5° 327° 63.3° | 13.6% more posterior (3.4% more posterior to 22.9% more posterior) 4.50° more anterior (3.15° more posterior to 12.15° more anterior) 19.15° more posterior (24.1° more posterior to 14.2° more posterior) 10.6° more posterior | 359 (4 studiesc) 20 (1 study) 126 (3 studies) 20 (1 study) |
c. Mediolateral position% | NE | NEd | 92 (2 studies) |
Aperture coronal plane position as distance from fixed anatomic landmark | |||
On specimen | |||
Distance of aperture center to ANT along AP axis | 19Â mm posterior | 0.6Â mm more anterior (0.8Â mm more posterior to 2Â mm more anterior) | 10 (1 study) |
On CT | Â | Â | Â |
Distance of aperture center to IAS Distance of aperture to IAS | 11.8Â mm NE | 2.4Â mm closer (3.6Â mm closer to 1.8Â mm closer) NEe | 20 (1 study) 40 (2 studies) |
On MRI | Â | Â | Â |
Distance of aperture center to O-t-T along AP axis | 1.4Â mm posterior | 7Â mm more posterior (6.65Â mm more posterior to 7.35Â mm more posterior) | 61 (1 study) |
Aperture sagittal plane position as % of scaling dimension | |||
a. Along BL Quadrant method | Â | Â | Â |
On CT On radiograph On MRI Harner method on radiograph Aglietti method On radiograph On specimen Aperture screw head position by quadrant method on radiograph | 30.9% 32.2% 15.2% 26.6% NE 52.7% 25% | 3% deeper (6.2% deeper to 0.3% shallower) 2.4% deeper (9.5% deeper to 4.7% shallower) 2.9% deeper (5.9% deeper to 0.1% shallower) 12.5% shallower (9.9% shallower:15% shallower) NEf 8% shallower (4.2% shallower: 11.8% shallower) 5.7% shallower (2.7% shallower:8.7% shallower) | 1070 (16 studiesa) 102 (2 studiesb) 87 (2 studies) 92 (2 studies) 80 (2 studies) 12 (1 study) 30 (1 study) |
b. Along PD axis | Â | Â | Â |
Anatomic coordinate axis method on CT Heming method on coronal CT | 37.9% 74.67° | 0.6% more distal (0.9% more proximal to 2.25% more distal) 7° more distal (9° more distal to 5° more distal) | 359 (4 studiesc) 100 (1 study) |
Aperture sagittal plane position as distance from fixed anatomic landmark | |||
On specimen | Â | Â | Â |
Distance of aperture center to ANT along PD axis Distance of aperture posterior edge to PAS Distance of aperture center to PAS | 26.3Â mm proximal 2.32Â mm 6.1Â mm | 5.2Â mm more distal (9.5Â mm more distal to 0.9Â mm more distal) 0.04Â mm further (0.3Â mm closer to 0.3Â mm further) 0.85Â mm closer (1Â mm closer to 0.7Â mm closer) | 10 (1 study) 20 (1 study) 20 (1 study) |
On CT | Â | Â | Â |
Distance of aperture center to PAS Distance of aperture posterior edge to PAS Distance of aperture anterior edge to AAS | 10.8Â mm 3.36Â mm 9.9Â mm | 3.9Â mm closer (4.6Â mm closer to 3.2Â mm closer) 0.86Â mm closer (NS) 4.9Â mm closer (6.3Â mm closer to 3.5Â mm closer) | 20 (1 study) 20 (1studiy) 20 (1 study) |
On MRI | Â | Â | Â |
Distance of aperture center to O-t-T along PD axis | 8.6Â mm distal | 0.4Â mm more distal (0.3Â mm more proximal to 1.1Â mm more distal) | 61 (1 study) |