BioMed Research International / 2021 / Article / Tab 1 / Research Article
Is Bridge Plating of Comminuted Humeral Shaft Fractures Advantageous When Using Compression Plates with Three versus Two Screws per Fragment? A Biomechanical Cadaveric Study Table 1 Parameters of interest in both groups in terms of mean and standard deviation together with corresponding
values from the statistical analysis.
Parameter of interest Group value1 2 Morphological data BMD (mg HA/cm3 ) 193.3 (49.0) 205.3 (33.0) 0.64 Cortical average (mm) 4.35 (1.66) 4.98 (1.15) 0.34 Stiffness (plated) Lateral bending (Nm/°) 2.8 (1.4) 3.1 (1.2) 0.68 Anterior bending (Nm/°) 1.4 (0.2) 1.5 (0.2) 0.20 Axial bending (N/mm) 387.5 (143.3) 394.4 (134.3) 0.93 Torsion (Nm/°) 0.7 (0.2) 0.8 (0.1) 0.22 Normalized stiffness (%) Lateral bending 85.1 (59.5) 61.5 (18.1) 0.42 Anterior bending 35.8 (9.3) 31.6 (13.2) 0.52 Axial bending 23.1 (7.7) 21.2 (6.3) 0.60 Torsion 23.8 (4.4) 23.0 (1.7) 0.72 Torsional deformation (°) 500 cycles 0.40 (0.58) 0.15 (0.08) 0.36 1000 cycles 1.51 (1.97) 0.63 (0.47) 0.31 1500 cycles 2.77 (3.27) 1.31 (1.00) 0.30 2000 cycles 4.55 (5.41) 2.04 (1.48) 0.29 2500 cycles 6.35 (7.22) 2.89 (1.99) 0.27 3000 cycles 8.13 (8.70) 3.74 (2.45) 0.24 3500 cycles 10.83 (11.53) 4.69 (2.94) 0.22 Cycles and peak torque at torsional deformation 5° 3151 (1894) 7.3 (4.8) nm 4240 (1730) 9.5 (4.5) nm 0.24 10° 4122 (1933) 9.2 (4.9) nm 6080 (1862) 13.2 (4.7) nm 0.03 15° 4857 (1824) 10.7 (4.6) nm 6887 (1347) 14.8 (3.7) nm 0.01 20° 5328 (1617) 11.7 (4.2) nm 7393 (945) 15.8 (1.9) nm 0.01 Cycles and peak torque at failure 5650 (1159) 12.3 (2.32) Nm 7532 (786) 16.06 (1.57) Nm 0.01