Clinical Study
Minimum Lateral Bone Coverage Required for Securing Fixation of Cementless Acetabular Components in Hip Dysplasia
Table 3
Comparison of demographic and radiographic parameters between hips with and without radiolucent lines.
| | Parameters | Radiolucent line (−)
( hips) | Radiolucent line (+)
( hips) | value |
| | Demographic | | | | | Age (years) | 67.0 (50–85) | 77.0 (61–79) | 0.0404 | | Gender† (M : F) | 33 : 177 | 1 : 4 | 0.7952 | | BMI (kg/m2) | 24.0 (17.9–37.8) | 20.5 (14.6–32.7) | 0.1302 | | Crowe classification† (I or II : III or IV) | 199 : 11 | 5 : 0 | 1.0000 | | Follow-up period (months) | 49 (24–77) | 46 (37–57) | 0.7594 | | Surgical | | | | | Approach† (posterior : lateral) | 204 : 6 | 5 : 0 | 1.0000 | | Stem† (Perfix910 : S-ROM) | 188 : 22 | 5 : 0 | 1.0000 | | Number of screws† (1 : 2 : 3) | 3 : 196 : 11 | 0 : 5 : 0 | 1.0000 | | Autograft† | 27 | 2 | 0.1357 | | Radiographic | | | | | Cup anteversion (°) | 16.9 (0.0–35.0) | 14.0 (6.4–16.3) | 0.1349 | | Cup inclination (°) | 42.0 (22.0–60.8) | 37.1 (34.5–44.4) | 0.1136 | | Vertical distance (mm) | 19.9 (9.0–42.3) | 21.4 (11.1–25.7) | 0.8872 | | Horizontal distance (mm) | 33.6 (22.5–51.2) | 35.2 (26.9–38.0) | 0.5316 | | Cup center-edge angle (°) | 16.6 (−9.2 to 41.0) | 9.0 (6.3–20.8) | 0.1221 | | Bone coverage index (%) | 75.7 (48.8–96.2) | 68.2 (65.0–78.0) | 0.1002 |
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Values are presented as median (range). †Values are presented as number of hips.
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