Fig. 4From: Xenograft bone-patellar tendon-bone ACL reconstruction: a case series at 20-year follow-up as proof of principleAverage subjective evaluations for the four evaluable subjects (n = 4). Data are presented as mean plus standard deviation. * p < 0.05 for comparison of pre-operative results to either 6 months, or 1, 2, 5, 9, 12, or 20 years post-operative resultsBack to article page