Just be careful of the type of wrist guard you get. Some cause worse damage.
I personally hate any guard that goes over the top of my hand. I like the ones that start at my palms and go down past the wrist. I had Dakine gloves with these built in and used them while I had a broken hand and dislocated wrist bones (non snowboarding injury). Worked like a charm.
By the way, I did 9 years of Tae Kwon Do and unofficially trained in a variety of other arts like Jiu Jitsu for a number of years. Love the arts!