Thumb Base Arthrosis - Basilar Joint, Trapeziometacarpal Arthrosis
Thumb Base Arthrosis according to Mayo Clinic - The exact cause of thumb arthritis, as with osteoarthritis in general, isn't known. Researchers suspect that it's a combination of factors, including being overweight, the aging process, joint injury or stress, heredity, muscle weakness, and "cumulative load" to the joint. Cumulative load refers to repetitive use of your joint, such as in assembly line work.
The exact cause of thumb arthritis is unclear, but these factors increase your risk:
* Being female
* Being 40 years or older
* Having certain hereditary conditions, including joint ligament laxity and malformed joints
* Experiencing injuries to your basal joint, such as fractures and sprains
* Having diseases that change the normal structure and function of cartilage, such as rheumatoid arthritis
* Performing certain activities and jobs that put high stress on this joint Usually it is the Result of a continuous Push-Work with the Thumb.
It can also appear genetically one or both sided.
This Use of the cartilage at the Base of the First Metacarpus causes severe Pain and Disability. The usual surgical treatment becomes necessary after failure of all conservative Managements. Usually there are two main Methods of Surgery; The one is Arthrodesis at the Joint between Trapezium and the First Metacarpus and the other is a simple Trapezectomy.
Both Methods are disadvantageous since the Arthrodesis maintain a severe limitation of Movements and the other method ends with a free, unstable and short Thumb with non- congruent Joint and continues Pain and Disability.
Anatomy Local Arthrosis
Arthrosis Trapezectomy after 30 days 2 years after Trapezectomy
Minimal invasive Removal of a Carpal Bone (Trapezium) causes Instability, Shortening and continuous Disability.
The Minimal Invasive Approach is performed The Full Operation restores Subluxation
in the Old Age where Grasping remains sufficient. and regains Force and Mobility for hard