What are the causes of Rizarthrosis?
The continuous rubbing or friction between the metacarpal bones and the trapezius, this leads to a constant wear. In addition, the ligaments become so relaxed that the relationship between the trapezius joint and the metacarpal joint (luxation or dislocation) is lost.
What are the symptoms of Rizarthrosis?
The pain occurs at the base of the thumb and can range from occasional pain to a strong and weakening pain, which is increased by activity, mainly done by gripper and grip movements, such as cutting with a pair of scissors, uncapping a bottle, opening a door.