Table I.
Specimen-specific measurements that resulted in a significant finding when comparing the 2 technique groups
| Specimen no. | Starting point from AC joint | GTH (1) vs axillary nerve (mm) | GTL (3) vs axillary nerve (mm) | Calcar screw (4) vs axillary nerve (mm) | Articular margin to lateral edge of insertion (mm) | Maximal screw spread between LT and GTL (mm) | Acromion to axillary nerve (mm) | AP radiographic eval distance from medial GT to guide pin (mm) | AP radiographic eval distance from lateral GT to guide pin (mm) |
|---|---|---|---|---|---|---|---|---|---|
| Medial specimens | |||||||||
| 7: Right 64F | 4 mm lateral | 40 | 35 | 20 | 8 | 64 | 65 | 54 | 92 |
| 2: Left 55F | 0 mm | 68 | 43 | 3 | 4 | 50 | 55 | 50 | 154 |
| 3: Left 62M | 0 mm | 40 | 24 | 18 | 10 | 58 | 60 | 84 | 155 |
| 4: Left 56F | 2 mm medial | 38 | 32 | 24 | 6 | 57 | 65 | 59 | 116 |
| 5: Right 77M | 5 mm lateral | 50 | 38 | 24 | 6 | 59 | 60 | 80 | 162 |
| Lateral specimens | |||||||||
| 1: Left 64F | 8 mm lateral | 22 | 14 | 5 | 0 | 29 | 60 | 39 | 116 |
| 6: Left 58F | 20 mm lateral | 21 | 9 | 10 | 2 | 48 | 62 | 17 | 60 |
| 8: Right 72F | 5 mm lateral | 42 | 36 | 7 | 0 | 45 | 80 | 11 | 54 |
| 9: Right 62F | 35 mm lateral | 40 | 26 | 15 | 0 | 35 | 54 | -12∗ | 38 |
| 10: Left 72F | 25 mm lateral | 25 | 20 | 4 | 5 | 47 | 50 | 23 | 77 |
AC, acromioclavicular; GTH, greater tuberosity high (screw); GTL, greater tuberosity low (screw); LT, lesser tuberosity; GT, greater tuberosity; AP, anteroposterior; eval, evaluation.
∗
Negative measure indicates measurement in the medial direction.