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Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 4 The acceptable combined anteversions and acceptable reconstructions (all six criteria were matched) for every stem design stratified according to two classes of femoral anteversion; note that the differences between the groups were significant

From: Which stem in total hip arthroplasty for developmental hip dysplasia? A comparative study using a 3D CT-based software for pre-operative surgical planning

Femoral anteversion Stem design Pearson’s chi-square test (p value)
Single wedge Anatomical Conical
Acceptable combined anteversion Acceptable combined anteversion Acceptable combined anteversion
Yes No Yes No Yes No
< 25° (74 cases) 63 (85.1%) 11 (14.9%) 52 (70.3%) 23 (29.7%) 72 (97.3%) 2 (2.7%)  < 0.0007
≥ 25° (126 cases) 90 (71.4%) 36 (28.6%) 65 (51.6%) 61 (48.4%) 125 (99.2%) 1 (0.8%)  < 0.0001
  Acceptable reconstruction (all parameters) Acceptable reconstruction (all parameters) Acceptable reconstruction (all parameters) Pearson’s chi-square test (p value)
Yes No Yes No Yes No  
< 25° (74 cases) 58 (78.4%) 16 (21.6%) 44 (59.5%) 30 (40.5%) 63 (85.1%) 11 (14.9%) 0.0096
≥ 25° (126 cases) 80 (63.5%) 46 (37.5%) 43 (34.1%) 83 (65.9%) 111 (88.1%) 15 (11.9%)  < 0.0001