Table 2. Mean ± standard deviation for cortical bone morphology, trabecular bone volume fraction and microarchitecture, cortical cyclic indentation outcomes, trabecular compressive biomechanical properties, and AGE measures in the femoral neck and serum from non-diabetic and T2D subjects. All data were adjusted for race, sex, gender, and BMI.
Non-Diabetic | Type 2 Diabetic | |
---|---|---|
Microcomputed Tomography | ||
Cortical tissue mineral density (mgHA/ccm) | 909 ± 39 | 916 ± 47 |
Cortical porosity (%) | 16.3 ± 7.2 | 16.8 ± 6.7 |
Tb.BV/TV (%) | 32.0 ± 5.0 | 32.7 ± 7.7 |
Tb.N (1/mm) | 1.95 ± 0.19 | 2.01 ± 0.33 |
Tb.Th (mm) | 0.17 ± 0.02 | 0.16 ± 0.02 |
Tb.Sp (mm) | 0.352 ± 0.060 | 0.346 ± 0.092 |
Conn.D (1/mm3) | 10.57 ± 2.57 | 11.41 ± 5.00 |
Cyclic Reference Point Indentation | ||
Indentation distance (μm) | 71.4 ± 18.1 | 73.4 ± 16.7 |
Creep indentation distance (μm) | 5.88 ± 1.31 | 6.91 ± 1.50* |
Total indentation distance (μm) | 80.0 ± 20.1 | 83.9 ± 19.5 |
Indentation distance increase (μm) | 13.6 ± 4.3 | 16.4 ± 4.7* |
Average energy dissipation (μJ) | 19.3 ± 5.4 | 20.0 ± 5.7 |
Average loading slope (N/μm) | 0.40 ± 0.06 | 0.39 ± 0.06 |
Average unloading slope (N/μm) | 0.53 ± 0.07 | 0.52 ± 0.07 |
Compressive Biomechanical Properties | ||
Apparent compressive modulus (MPa) | 566 ± 174 | 590 ± 243 |
Yield stress (MPa) | 2.29 ± 1.54 | 1.20 ± 0.90φ |
Maximum stress (MPa) | 3.36 ± 0.79 | 3.30 ± 0.95 |
Stress at 3% strain (MPa) | 2.40 ± 0.66 | 2.32 ± 0.69 |
Toughness to maximum point (mJ/mm3) | 0.014 ± 0.009 | 0.014 ± 0.005 |
Toughness to 3% strain (mJ/mm3) | 0.071 ± 0.018 | 0.070 ± 0.021 |
Post-yield toughness (mJ/mm3) | 0.06 ± 0.02 | 0.07 ± 0.02 |
Advanced Glycation End-Products (AGEs) | ||
Cortical bone AGEs (ng quinine/mg collagen) | 178 ± 53 | 216 ± 64φ |
Trabecular bone AGEs (ng quinine/mg collagen) | 211 ± 60 | 224 ± 50 |
Serum pentosidine (ng/mL) | 46.6 ± 11.5 | 53.5 ± 11.7 |
Serum AGEs (μg/mL) | 32.3 ± 9.2 | 29.2 ± 7.1 |
p≤0.05
0.05<p≤0.10