I ruptured my Achilles in August of 2010 (softball, rounding first with visions a double)
It was torn but did NOT roll up to the calf muscle
I did not want to go with surgery - infection risk, scars, adhesions, etc
At U Mich Foot / Ankle they have a protocol for who does or does not qualify for
a non-surgical treatment.
I had two ultrasounds taken, with one my foot at 90 degrees (torn ends farther apart)
and the other with my toes pointing down (torn ends closer)
I dont know the cutoffs but my "gaps" were 15 mm and 7 mm respectively, which
was close enough for them to admit me as a non-surgical patient.
Hard cast with foot down (28 degrees), then aircast (removable) with heel wedges,
then back the heel wedges down over several weeks for each wedge.
I skied December 2010 and ran marathons in 2011, so i could not be happier
with my decision.
HIGHLY HIGHLY recommend www.achillesblog.com
tons of support, information and advice
PM me if you care to discuss.
ps - tendons do grow back together; the Achilles tendon is the largest one in our body. Even with surgery,
what the stitches do is hold the opposing ends in close proximity, then our body does the rest. One of the proponents
of non-surgical is at U Western Ontario - London.