The TFCC is the primary stabilizer of the wrist and the joint between the radius and ulna (radioulnar joint). It also supports the first row of carpals at the wrist.

The carpals, or wrist bones, ... This connects the other two bones to the radius, the inner bone of your arm. It’s a modified ball-and-socket joint that allows you to bend and rotate your wrist.

While a dislocated wrist can involve all eight carpals, your lunate and scaphoid bones are often affected. These two bones form a bridge between the radius and ulna bones in your forearm and the ...