Research Article
A Study of Success Rate of Miniscrew Implants as Temporary Anchorage Devices in Singapore
Table 3
Success rate of miniscrew implants at T2.
| | Success rate at T2 (%) | Number of 2nd outcome successes/Total number | Unadjusted odds ratio (95% CI) | Unadjusted value | Adjusted odds ratio (95% CI) | Adjusted value |
| Overall success | 83.3 | 214/257 | | | | | Age at surgery | | | | 0.082 | | 0.270 | <20 years | 80.7 | 151/187 | 0.47 (0.20 to 1.10) | | 0.49 (0.14 to 1.73) | | ≥20 years | 90.0 | 63/70 | 1 | | 1 | | Gender | | | | 0.482 | | 0.109 | Female | 81.4 | 92/113 | 1 | | 1 | | Male | 84.7 | 122/144 | 1.27 (0.66 to 2.44) | | 2.12 (0.85 to 5.31) | | Sagittal skeletal malocclusion | | | | 0.025* | | 0.487 | Class I | 89.5 | 77/86 | 1 | | 1 | | Class II | 83.5 | 101/121 | 0.59 (0.23 to 1.54) | 0.438 | 0.88 (0.25 to 3.19) | 0.852 | Class III | 68.6 | 24/35 | 0.26 (0.08 to 0.79) | 0.014* | 0.25 (0.02 to 2.56) | 0.240 | Vertical skeletal malocclusion | | | | 0.028* | | 0.043* | High angle | 79.6 | 82/103 | 1 | | 1 | | Average | 92.6 | 87/94 | 3.18 (1.13 to 8.98) | 0.025* | 4.22 (1.35 to 13.16) | 0.013* | Low angle | 75.0 | 12/16 | 0.77 (0.19 to 3.13) | 1 | 2.20 (0.36 to 13.33) | 0.391 | Dental malocclusion | | | | 0.260 | | 0.770 | Class I | 88.9 | 48/54 | 1 | | 1 | | Class II Div. I | 84.0 | 126/150 | 0.69 (0.22 to 2.16) | 1 | 0.81 (0.18 to 3.70) | 0.787 | Class III | 75.0 | 30/40 | 0.39 (0.03 to 2.66) | 1 | 1.25 (0.09 to 17.71) | 0.339 | Class II Div. 2 | 71.4 | 5/7 | 0.30 (0.10 to 1.47) | 1 | 0.22 (0.01 to 5.02) | 0.868 | Side of placement | | | | 0.590 | | | Left | 85.4 | 105/123 | 1.38 (0.65 to 2.93) | 1 | | | Midline | 100 | 4/4 | 2.18 (0.05 to 94.33) | 1 | | | Right | 80.8 | 105/130 | 1 | | | | Recipient jaw | | | | 0.081 | | 0.065 | Maxilla | 81.4 | 175/215 | 1 | | 1 | | Mandible | 92.9 | 39/42 | 2.97 (0.87 to 10.10) | | 9.59 (0.87 to 105.86) | | Site of placement | | | | 0.404 | | | Anterior region | 92.9 | 13/14 | 2.45 (0.18 to 33.59) | 1 | | | Posterior region | 80.9 | 131/162 | 0.80 (0.31 to 2.07) | 1 | | | Retromolar | 94.4 | 17/18 | 3.21 (0.24 to 43.06) | 0.848 | | | Palate | 84.1 | 53/63 | 1 | | | | Miniscrew implant type | | | | 0.508 | | 0.769 | AbsoAnchor | 78.3 | 18/23 | 1 | | 1 | | Vector TAS | 83.7 | 195/233 | 1.43 (0.50 to 4.07) | | 1.22 (0.33 to 4.53) | | Miniscrew length | | | | 0.108 | | 0.030* | 6-7 mm | 76.7 | 33/43 | 1 | | 1 | | 8 mm | 82.1 | 138/168 | 1.39 (0.55 to 3.52) | 0.843 | 2.91 (0.93 to 9.13) | 0.067 | 10–12 mm | 93.5 | 43/46 | 4.34 (0.91 to 20.75) | 0.071 | 17.95 (1.83 to 176.01) | 0.013* | Miniscrew diameter | | | | 0.122 | | | 1.3 mm | 79.2 | 19/24 | 0.20 (0.03 to 1.41) | 0.128 | | | 1.4 mm | 81.2 | 156/192 | 0.22 (0.04 to 1.19) | 0.089 | | | 2.0 mm | 95.1 | 39/41 | 1 | | | |
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