144 patients with primary complete achilles tendon rupture were randomized to be treated with a surgical repair and accelerated functional rehabilitation or just the accelerated functional rehabilitation. Over the course of two year follow up, it was observed that achilles tendon rupture lead to clinically similar results between the two treatment groups.
J Bone Joint Surg Am. 2010 Dec 1;92(17):2767-75. Epub 2010 Oct 29.