be very careful if you are going back to training. It really is better to get over it completely than to risk worse problems to come.
On the other hand..............
A lot can still be done in training. Mark the injury with tape. Make SURE that your partner (preferably someone whose abilities you trust) will not crank it.
Do the technique without getting the actual wrist manipulation.
For instance, kotegaeshi- do the tai-sabaki training in a normal fashion, then as the grip comes for the standard kotegaeshi, nage shifts his grip down to the lower forearm and performs the technique
while not bending the wrist or injuring you further.
It is not the same EXACT feeling, but it is close and you get to continue to work on all the other aspects of that technique without the risk.
There are many other parts to each tech. other than the final "twist".
You can get as much benifit out of it as you are willing to dig out.