02794nam a22002417a 4500001001300000003000400013005001700017008004100034245027000075520174300345580006102088650002202149650001702171650002802188650002702216700002102243700003702264700002302301856008202324942000702406999001502413952012402428D0001J000078DOH20210219133816.0210219b           ||||| |||| 00| 0 eng d00aComparison of the hybrid locking plate, standard dynamic compression plate, and standard dynamic compression plate augmented with bone cement for fixation of osteoporotic humeral shaft fractures : ba cadaveric biomechanical study /cIrewin A. Tabu [and two others]3 aBACKGROUND: Studies comparing the relative strength of polymethylmethacrylate (PMMA) augmented fixation, standard plating and locked compression plate (LCP) system are few. The use of either the bone cement-augmented dynamic compression plate or the Hybrid LCP constructs may provide an additional tool for the treatment of fractures in patients with osteoporosis.


METHODS: Eighteen (18) osteoporotic cadaveric humeral bones were assigned randomly to each of three groups (Dynamic Compression Plate [DCP], DCP augmented with bone cement, and the Hybrid LCP system) and tested in anterior-posterior bending and torsion/external rotation. The load to failure values were obtained and the results for each specimen compared.


RESULTS: Significant differences were observed between the standard DCP and Hybrid LCP group (p-value=0.012), and in the cement-augmented and Hybrid LCP group (p-value=0.099) in torsion/external rotation loading. No significant difference was observed between the standard DCP and bone-cement augmented group (p-value=0.248). No significant difference was observed among the three groups in terms of stiffness (p-value=0.3868) in the four-point anterior-posterior bending modality. Screw pull-out of the implant was observed only in the regular DCP group in torsion/external rotation loading stress.


CONCLUSION: Significant differences were seen between the three constructs in torsion/external rotation but not in anterior-posterior four-point bending. Bone failure, but not screw pull-out, was seen in the Hybrid LCP and bone cement-augmented DCP groups in torsion. This study showed that the LCP system and the bone cement-augmented constructs may provide greater screw purchase to the osteoporotic humerus.  aIn: Acta Medica Philippina, 2012 vol 46 (2) pages: 24-31 2aHumeral Fractures 2aOsteoporosis 2aPolymethyl Methacrylate 2aFractures, Compression1 aTabu, Irewin A. 1 aArbatin,  Jose Joefrey F. cJr. 1 aBundoc, Rafael C.   uhttps://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/2155/1570  cJA  c2986d2986  00102nlm4070aDOHCLbDOHCLcElectronicResd2021-02-19l0oJ000078pD0001J000078r2021-02-19 00:00:00w2021-02-19yJA