Table 2.
Comparison of patients treated for mandibular head fractures with magnesium screw (test group) and titanium screw (reference group) fixation.
| Variable | Test Group |
Reference Group |
Between-Group Difference |
|---|---|---|---|
| Age | 33 ± 22 years old | 38 ± 15 years old | p = 0.566 |
| Internal Comorbidity | 3 patients | 5 patients | p = 0.440 |
| Type C Head Fracture | 7 patients | 7 patients | p = 1.000 |
| Type P Fracture | 11 patients | 8 patients | p = 0.415 |
| Dislocation in Joint | 9 patients | 11 patients | p = 0.283 |
| Ramus Shortening | 6.1 ± 4.5 mm | 8.4 ± 4.5 mm | p = 0.261 |
| Head Fragmentation 1 | 3 ± 1 | 2 ± 1 | p = 0.175 |
| Occlusion | 3 cross, 2 open | 7 cross, 4 open | p < 0.05 |
| Tooth Injury | 4 patients | 1 patient | p = 0.251 |
| Additional Mandible Fracture | 3, body | 7, body | p = 0.270 |
| Additional Maxillofacial Fracture | Yes (6 patients) | No | p < 0.05 |
| Additional Body Injury | Yes (2 patients) | Yes (2 patients) | p = 0.918 |
| Delay to Treatment | 4.9 ± 3.8 day | 5.1 ± 3.8 day | p = 0.908 |
| Surgery Duration | 230 ± 103 min | 258 ± 104 min | p = 0.541 |
| Number of Used Screws | 2.4 ± 0.7 | 1.9 ± 0.3 | p < 0.05 |
| Length of Screws | 14 ± 0 mm | 16 ± 2 mm | p < 0.05 |
| Restored Ramus Height (h) | 64.9 ± 5.1 mm | 65.4 ± 2.0 mm | p = 0.786 |
| Mandible Head Status (factor) | 5.5 ± 2.5 | 3.3 ± 2.3 | p = 0.052 |
| Helkimo Index Early | 4.1 ± 3.0 | 2.4 ± 2.7 | p = 0.118 |
| Helkimo Index Late | 1.7 ± 2.0 | 2.4 ± 3.1 | p = 0.971 |
| 03 M Cutaneous Tactile Perception | No Recovery (8) | No Recovery (8) | p = 1.000 |
| 06 M Cutaneous Tactile Perception | No Recovery (7) | No Recovery (7) | p = 1.000 |
| 18 M Cutaneous Tactile Perception | No Recovery (3) | No Recovery (1) | p = 0.508 |
| 00 M Facial Nerve Disfunction | 2.7 ± 0.8 | 2.7 ± 0.6 | p = 0.933 |
| 18 M Facial Nerve Disfunction | 1.1 ± 0.3 | 1.2 ± 0.6 | p = 1.000 |
| 00 M Occlusion | Normal (9) | Normal (6) | p = 0.056 |
| 00 M MIO | 21 ± 4.9 mm | 24 ± 10.0 mm | p = 0.190 |
| 00 M Ipsilaterotrusion | 6.0 ± 3.9 mm | 4.1 ± 2.7 mm | p = 0.259 |
| 00 M Contralaterotrusion | 3.9 ± 2.2 mm | 3.6 ± 1.7 mm | p = 0.736 |
| 03 M Occlusion | Normal (9) | Normal (8) | p = 0.280 |
| 03 M MIO | 38 ± 5.2 mm | 32 ± 7.4 mm | p < 0.05 |
| 03 M Ipsilaterotrusion | 7.7 ± 3.5 mm | 5.8 ± 3.9 mm | p = 0.323 |
| 03 M Contralaterotrusion | 6.3 ± 2.8 mm | 4.7 ± 2.9 mm | p = 0.278 |
| 06 M Occlusion | Normal (9) | Normal (7) | p = 0.143 |
| 06 M MIO | 38 ± 10.7 mm | 40 ± 4.1 mm | p = 0.674 |
| 06 M Ipsilaterotrusion | 7.2 ± 4.4 mm | 10.5 ± 2.5 mm | p = 0.196 |
| 06 M Contralaterotrusion | 5.9 ± 4.5 mm | 9.5 ± 1.9 mm | p = 0.161 |
| 18 M Occlusion | Normal (10) | Normal (8) | p = 0.083 |
| 18 M MIO | 43 ± 3.4 mm | 39 ± 3.4 mm | p < 0.05 |
| 18 M Ipsilaterotrusion | 8.3 ± 3.2 mm | 10 ± 2.3 mm | p = 0.223 |
| 18 M Contralaterotrusion | 7.8 ± 2.3 mm | 8.1 ± 3.0 mm | p = 0.870 |
| 18 M Ramus Height Loss | 4.4 ± 3.3 mm | 4.2 ± 3.1 mm | p = 0.879 |
| Ramus Height Loss per Month | 0.4 ± 0.3 mm | 0.7 ± 1.0 mm | p = 0.777 |
| 18 M Relative Loss of Ramus | 7% ± 5% | 6% ± 5% | p = 0.835 |
1 Number of bone fragments except main distal fragment connected to the ramus and remaining mandible; MIO—maximal interincisal opening; 00 M—immediate postoperational; 03, 06, 18 M—3, 6, 18 months post-operationally.