what are the cmc and ip joints of the thumb
What is the thumb IP joint and what problems occur? The IP joint is the end joint of the thumb. It is shaped as a double dome side by side on the hand side of the joint and two side by side matching shallow curves on the nail side. This allows mobility in bending and straightening but stability in sideways and twisting movements.
The carpometacarpal joint of the thumb, also known as the first carpometacarpal joint, or the trapeziometacarpal joint (TMC) because it connects the trapezium to the first metacarpal bone, plays an irreplaceable role in the normal functioning of the thumb.