Table 1.
Groupsa | Ultimate fracture loadb(N) | Energy absorbed (N-m) | X-ray density(central head region) (mmAl) | X-ray density scoreb | BMDb(g/cm2) | Proximal humerus volume (cm3) | Bulk density (g/cm3) | Fracture patternc |
---|---|---|---|---|---|---|---|---|
Group 1 (control, n=8) | 4176 | 10.7 | 8.0 | 0.18 | 0.38 | 67.7 | 0.13 | 1, 2, 5, 6, 6, 6, 7, 7 |
(2003) | (7.0) | (2.2) | (0.04) | (0.13) | (16.5) | (0.04) | ||
866–6853 | 2.7–21.6 | 4.9–11.6 | 0.12–0.25 | 0.08–0.49 | 43–89 | 0.03–0.18 | ||
Group 2 (n=6) | 4041 | 11.8 | 7.3 | 0.17 | 0.24 | 77.8 | 0.08 | 1, 1, 1, 1, 3, 7 |
(1568) | (8.5) | (1.5) | (0.03) | (0.07) | (22.1) | (0.02) | ||
2224–6673 | 3.6–26.3 | 5.4–8.8 | 0.13–0.22 | 0.12–0.31 | 56–108 | 0.05–0.12 | ||
Group 3 (n=6) | 3885 | 7.7 | 6.2 | 0.15 | 0.27 | 70.8 | 0.11 | 1, 2, 5, 7, 7, 7 |
(1170) | (3.4) | (0.8) | (0.02) | (0.06) | (20.2) | (0.03) | ||
2714–5694 | 3.9–11.8 | 5.5–7.4 | 0.12–0.18 | 0.19–0.35 | 55–109 | 0.07–0.14 | ||
Group 4 (n=12) | 3700 | 10.8 | 6.2 | 0.14 | 0.35 | 86.6 | 0.12 | 1, 1, 1, 1, 3, 5, 5, 5, 6, 6, 7, 7 |
(1227) | (5.2) | (1.2) | (0.03) | (0.10) | (17.6) | (0.03) | ||
2091–6183 | 3.0–18.5 | 4.6–8.7 | 0.10–0.19 | 0.14–0.51 | 60–118 | 0.07–0.17 |
Mean, (standard deviation), and range provided for each category.
Group 1, control bones (no rotator cuff repair); Group 2, transosseous suture-only repair (single row); Group 3, anchor-only repair (single row); Group 4, double-row TOAK repair.
Fracture load measured in Newtons (N); X-ray density score calculated as [central head density/anteroposterior breadth; (mmAl/mm)] bone mineral density (BMD) from dual-energy X-ray absorptiometry analysis.
Fracture pattern numerical designation described in methods section. All data are shown for fracture pattern.