Research Article
Anterior Bone Loss after Cervical Baguera C Disc versus Bryan Disc Arthroplasty
Table 2
Anterior bone loss of the upper adjacent level by grade.
| | Grade 0 and grade 1 () | Grade 2 () | value |
| | Sex | | | | | 0.001 | | Female | 23 | (40.4%) | 17 | (85.0%) | | | Male | 34 | (59.6%) | 3 | (15.0%) | | | Age, years | 57.0 | (50.0, 65.0) | 54.0 | (43.5, 63.8) | 0.260 | | Operative level | | | | | 0.312 | | C3-C4 | 14 | (24.6%) | 3 | (15.0%) | | | C4-C5 | 17 | (29.8%) | 3 | (15.0%) | | | C5-C6 | 24 | (42.1%) | 13 | (65.0%) | | | C6-C7 | 2 | (3.5%) | 1 | (5.0%) | | | Hybrid | | | | | 0.016 | | No | 23 | (40.4%) | 15 | (75.0%) | | | Yes | 34 | (59.6%) | 5 | (25.0%) | | | Depth of Baguera C Disc (mm) | | | | | 0.037 | | 13 | 0 | (0.0%) | 1 | (5.0%) | | | 14 | 16 | (28.1%) | 10 | (50.0%) | | | 16 | 41 | (71.9%) | 9 | (45.0%) | | | Height of Baguera C Disc (mm) | | | | | 0.001 | | 5 | 10 | (17.5%) | 12 | (60.0%) | | | 6 | 43 | (75.4%) | 8 | (40.0%) | | | 7 | 4 | (7.0%) | 0 | (0.0%) | | | Adjusted preoperative disc height (mm) | 4.71 | (3.78, 5.49) | 3.95 | (3.61, 4.78) | 0.017 | | Postoperative measurements | | | | | | | Global alignment angle | 19.0 | (10.5, 26.0) | 17.5 | (10.0, 24.0) | 0.688 | | Lordotic angle | 6.0 | (2.0, 13.0) | 7.5 | (3.5, 13.8) | 0.222 | | Shell angle | 0.0 | (-3.0, 3.5) | 2.0 | (-0.8, 6.8) | 0.042 | | Global ROM | 43.0 | (32.5, 52.5) | 52.0 | (29.3, 64.0) | 0.205 | | Index level ROM | 14.0 | (10.0, 20.0) | 17.0 | (12.3, 24.8) | 0.207 | | Adjusted anteroposterior diameter of the upper adjacent endplate (mm) | 18.4 | (17.4, 19.1) | 16.3 | (15.8, 17.1) | <0.001 | | Mismatch (difference) between the implant and the upper adjacent endplate (mm) | 2.7 | (2.1, 3.3) | 1.7 | (1.1, 2.3) | 0.001 |
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Chi-square test. Mann–Whitney test, median (interquartile range). ; ; ROM: range of motion. |
