Table 4.
Radiological Outcome with Stemless Humeral Head Replacement at Final Follow-Up
| HSA (n = 27) |
HSA REV (n = 13) |
TSA (n = 26) |
TSA REV (n = 7) |
TOTAL (n = 73) |
|
|---|---|---|---|---|---|
| Group 1 | 18 | 9 (4 s OA + 4 s RCT + 1 undefined pain) |
16 | 3 (1 s RCT + 1 HH Fx + 1 undefined pain) |
46 |
| no RL/OL or minor RL in one or more zones | |||||
| No radiolucency | 16 | 7 | 12 | 3 | 38 |
| Zone 1 (minor RL) | 1 | 2 | 1 | 0 | 4 |
| Zone 5 (minor RL) | 1 | 0 | 2 | 0 | 3 |
| Zone 1 (minor RL) + Zone 5 (minor RL) | 0 | 0 | 1 | 0 | 1 |
| Group 2 | 1 | 2 (2 s OA) | 2 | 0 | 5 |
| major RL or partial OL in one or more zones | |||||
| Zone 1 (major RL) | 1 | 1 | 2 | 0 | 4 |
| Zone 1 (partial OL) + Zone 5 (partial OL) | 0 | 1 | 0 | 0 | 1 |
| Group 3 | 8 | 2 (2 s OA) | 8 | 4 (4 s RCT) | 22 |
| complete OL in one or more zones | |||||
| Zone 1 (major OL) | 0 | 0 | 1 | 0 | 1 |
| Zone 5 (major OL) | 4 | 1 | 5 | 1 | 11 |
| Zone 1(minorRL) + Zone 5 (majorOL) | 2 | 0 | 0 | 0 | 2 |
| Zone 1(majorOL) + Zone 5 (majorOL) | 2 | 1 | 2 | 3 | 8 |
| No internal stress shielding | 13 | 9 (5 s OA + 3 s RCT + 1 undefined pain) |
14 | 6 (5 s RCT + 1 HH Fx) | 42 |
| Internal stress shielding in one zone (1, 2, or 4) | 8 | 2 (2 s OA) | 5 | 0 | 15 |
| Internal stress shielding in two zones (12, 23, 24, or 34) | 5 | 2 (1 s OA + 1 s RCT) | 6 | 1 (1 undefined pain) | 14 |
| Internal stress shielding in three zones (125 or 234) | 1 | 0 | 1 | 0 | 2 |
Abbreviation: HH Fx Humeral Head Fracture, HSA Hemi Shoulder Arthroplasty, OL osteolysis, sec OA secondary Osteoarthritis, REV revision surgery, RL radiolucent line, sec RCT secondary Rotator Cuff Tear, TSA Total Shoulder Arthroplasty