Hi mate
I have done my RH UCL twice , once skiing in 2004 and mtb accident in 2013.
1st time was repaired in Austria as its a very common skiing injury. Google skiers thumb or Gamekeepers thumb for the lowdown.
Both times had sugery 4″ scar over lower thumb joint. First job was a simple suture, second time a pin was drilled into the thumb bone with some string to attatch the now shrunk and scared tendon back together.
The ultrasound will be able to spot instantly if the tendon is intact or not .It was blatent on mine. Grip strength is diminished , no doubt but it doesnt effect riding too much. Apparently Im in for artheritis in afew years as the joint is borked where I have hyper extended it twice.
2 weeks in a stock ‘plastercast , then 6 in a grp ‘scaph’ cast , plus 6mths of rehab involving silly putty and a squash ball.
any more info you wanna know just ask away