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  • Title: Cross Pin Versus Interference Screw for Femoral Graft Fixation in Hamstring Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis of Clinical Outcomes.
    Author: Hu B, Shen W, Zhou C, Meng J, Wu H, Yan S.
    Journal: Arthroscopy; 2018 Feb; 34(2):615-623. PubMed ID: 29066266.
    Abstract:
    PURPOSE: To compare the effectiveness of a cross pin and interference screw for femoral graft fixation in primary anterior cruciate ligament reconstruction (ACLR) and provide an appropriate reference for orthopaedic surgeons. METHODS: The Medline, Cochrane Library, Web of Science, Scopus, and PubMed databases were searched in March 2016, and comparative trials using cross-pin and interference screw devices for femoral graft fixation in primary hamstring ACLR with clinical outcome measurements were included in the review. Trials with no controlled groups, hybrid fixation, no clinical outcomes, or follow-up of less than 1 year were excluded. The quality of the included studies was assessed with the Cochrane Back Review Group 12-item scale. Abstracted data were pooled with fixed or random effects depending on the detected heterogeneity. The outcome measures were the scoring system and physical examination findings, including the Lysholm score, International Knee Documentation Committee score or grade, Tegner score, negative Lachman test, negative pivot-shift test, and instrumented side-to-side anterior-posterior laxity difference. RESULTS: All the studies reviewed were of prospective design. Within the cross-pin group, patients who underwent hamstring ACLR showed a significantly smaller instrumented side-to-side anterior-posterior laxity difference when compared with interference screw fixation (weighted mean difference, 0.38 mm [95% confidence interval, 0.08-0.67 mm]; P = .01), whereas the results of a negative Lachman test and negative pivot-shift test were comparable. Outcomes regarding the scoring system did not reach a significant difference between the 2 groups. CONCLUSIONS: The statistically decreased instrumented side-to-side anterior-posterior laxity difference achieved by cross-pin transfixation appears to be of limited clinical significance when compared with interference screw fixation in primary hamstring ACLR. Clinically, the performance of cross-pin devices did not show a significant advantage over that of the interference screw for femoral graft fixation in hamstring ACLR. LEVEL OF EVIDENCE: Level II.
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