Arthrosis of The Thumbar Joint – Rhizarthrosis
The thumb is subjected to high loads during a lifetime. The pivotal point is the thumb saddle joint.
It hides itself in the thumb ball and allows the rotation of the entire thumb and the opposing of the thumb to the other fingers (so-called opposition). An arthritis of this joint is called rhizarthrosis and is relatively frequent: 10% of women over 50 years are affected, in men, this type of osteoarthritis is less frequent.
Symptoms
“I can not open a bottle.
Objects suddenly fall from my hand.
Sometimes I have pain in the back of my head or at night.”
Diagnosis
By a simple X-ray examination in 2 planes. This shows a narrowing of the joint gap, possibly also emigration of the thumb from the saddle joint, sometimes cystic changes in the interior of the bone.
The passive movement of the joint creates pain and provides important information about the …
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