Table 2.
Radiological parameters for specification of the centring of humeral head
| Parameters | Preoperative, mean ± SD (mm) | Postoperative, mean ± SD (mm) | Opposite side, mean ± SD (mm) | P value, pre-/postoperative | P value, postoperative/ opposite side |
|---|---|---|---|---|---|
| Modern adjustable prosthesis / Affinis; n = 106 | |||||
| AHD | 10.08 ± 4.37 | 11.46 ± 4.85 | 10.14 ± 2.85 | 0.0010 | 0.4810 |
| DTA | 9.07 ± 8.31 | 13.44 ± 7.70 | 14.57 ± 5.03 | 0.0001 | 0.9650 |
| DTC | 56.81 ± 9.23 | 60.01 ± 7.28 | 61.76 ± 8.89 | 0.0001 | 0.1680 |
| DCR | 37.45 ± 7.08 | 36.01 ± 5.93 | 36.22 ± 5.65 | 0.0100 | 0.0940 |
| DGR | 25.49 ± 5.33 | 24.44 ± 3.47 | 23.66 ± 5.33 | 0.0120 | 0.4850 |
| Second generation prostheses; n = 47 | |||||
| AHD | 10.20 ± 5.36 | 8.49 ± 5.58 | 9.18 ± 2.76 | 0.013 | 0.956 |
| DTA | 9.07 ± 10.60 | 11.46 ± 10.74 | 9.71 ± 6.36 | 0.037 | 0.316 |
| DTC | 59.00 ± 11.91 | 59.00 ± 11.55 | 62.93 ± 8.80 | 0.467 | 0.064 |
| DCR | 35.17 ± 9.49 | 33.91 ± 8.93 | 35.50 ± 5.24 | 0.289 | 0.314 |
| DGR | 21.53 ± 6.36 | 21.57 ± 5.52 | 20.64 ± 4.75 | 0.978 | 0.422 |
AHD acriomio-humeral distance, DTA distance greater tuberosity/acromion, DTC distance greater tuberosity/coracoid, DCR distance coracoid/rotational centre, DGR distance glenoid/rotational centre