All-Inside Anterior Cruciate Ligament Reconstruction Had Clinical Outcome Similar to the Transtibial Technique Except For Improved Side-to-Side Difference and Tegner Activity Scale: A Systematic Review and Meta-analysis

To compare clinical outcomes of the all-inside technique with the transtibial technique in anterior cruciate ligament reconstruction based on available literature on this topic.According to the PRISMA checklist, we conducted a systematic search for randomized controlled trials and Cohort studies. Our comprehensive search encompassed PubMed, Embase, Cochrane Library, and Web of Science. We included RCTs and cohort studies that compared the two techniques with a minimal one-year follow-up. Two independent authors assessed RCTs using the risk of bias tool developed by the Cochrane Collaboration, and evaluated the quality of cohort studies using the Newcastle-Ottawa Scale for Assessing the Quality of Nonrandomized Comparative Trials. The subjective and objective outcomes, complication, and graft failure were obtained. The R software was used to perform the analysis.The present analysis enrolled 9 RCTs (n= 687) and 11 cohort studies (n= 910) . After a minimal one-year follow-up in RCTs, functional outcomes such as IKDC subjective score, Lysholm score, Tegner activity scale, Knee society score, and Hop test were found to be similar between two techniques. The laxity outcomes including the IKDC objective grade and Pivot-shift test, were suggested to be comparable. There was a significant difference favoring the transtibial technique in terms of side-to-side difference (P=0.04, 95% CI= 0.08 to 0.90). The pooled data from cohort studies indicated equivalent results in terms of IKDC subjective score, Lysholm score, Side-to-side difference, IKDC objective grade, Complication, and Graft failure, with the exception of statistical difference in the Tegner activity scale (P=0.03, 95% CI= -0.50 to -0.04).Our findings suggest that there is no difference in most outcome scores between the all-inside and transtibial techniques for anterior cruciate ligament reconstruction. There are statistically significant differences in side-to-side difference and Tegner activity scale favoring all-inside technique.