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- W2034953773 abstract "<h3>Purpose</h3> The purpose of this study was to compare anterior cruciate ligament (ACL) fixation using a bioabsorbable interference screw (BIS) and a supplemental low-profile suture anchor (PushLock 4.5-mm polyetheretherketone anchor; Arthrex, Naples, FL) with a standard BIS fixation to determine if fixation methods were dependent on tibial bone mineral density (BMD). <h3>Methods</h3> Ten matched pairs of fresh-frozen human female knee specimens (20 total) were harvested with specimen ages ranging from 40 to 65 years. The BMD for each specimen was determined with a dual-energy x-ray absorptiometry scanner. The specimens were divided into 2 groups, 1 with a BIS and the other with a BIS plus a PushLock. Tibial-sided ACL fixation with hamstring tendon grafts was performed on all the specimens. Then, load to failure and stiffness were biomechanically tested. <h3>Results</h3> The BIS-plus-PushLock specimens had a significantly higher mean yield load compared with specimens with the BIS alone (702 N <i>v</i> 517 N, <i>P</i> = .047). However, in samples with lower bone density, there was no statistically significant difference in failure loads between fixation techniques (<i>P</i> = .8566 at BMD of 0.5 g/cm<sup>2</sup>). As the bone density of the samples increased, the failure loads increased for both techniques (<i>P</i> < .0001 for PushLock and <i>P</i> = .0057 for BIS). This BMD-associated increase was greater for the PushLock (<i>P</i> = .0148), resulting in a statistically significant difference in failure load at the upper range tested (<i>P</i> = .0293 at BMD of 0.9 g/cm<sup>2</sup>). <h3>Conclusions</h3> Supplemental fixation of ACL reconstructions with a PushLock is beneficial in persons with a normal BMD of the proximal tibia, but at a lower BMD, there was no difference in our study. <h3>Clinical Relevance</h3> Individuals with normal BMDs may benefit from this supplemental fixation. However, caution should be used in postmenopausal women or individuals with chronic ACL injuries when using this fixation strategy." @default.
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- W2034953773 date "2013-09-01" @default.
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- W2034953773 title "Effectiveness of Low-Profile Supplemental Fixation in Anterior Cruciate Ligament Reconstructions With Decreased Bone Mineral Density" @default.
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- W2034953773 doi "https://doi.org/10.1016/j.arthro.2013.05.019" @default.
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