What is the beak ligament?
The AOL, also known as the beak ligament, has its origin at the volar tubercle of the trapezium and attaches to the volar beak of the first metacarpal base, at the ulnar-volar aspect of the joint. 6, 7, 8, 9. It has been described as consisting of a superficial, capsular layer and a deep, intracapsular layer.
What is a CMC injury?
Dislocation of the thumb carpometacarpal (CMC) joint is a rare injury in the hand. This injury is usually the result of an axial transmitted force through a partially flexed thumb. [1] The patient complained of swelling and tenderness over the CMC joint.
What is severe first CMC osteoarthritis?
Severe first carpometacarpal joint osteoarthritis leads to stiffness and adduction deformity at the basal joint, with accompanying compensatory hyperextension deformity at the first metacarpophalangeal joint.
What is CMC dislocation?
Traumatic fracture dislocations of carpometacarpal (CMC) joints is a rare injury that presents in less than 1% of hand and wrist injuries. 1) CMC joint dislocation occurs with other associated fractures. Most CMC joint dislocations are missed on X-ray of wrist joint and hand due to overlapping of bones.
What is CMC arthroplasty surgery?
One type of surgery is called a thumb carpometacarpal (CMC) joint arthroplasty. This surgery is done to relieve pain in your thumb and wrist and give you movement of the thumb. It is often done as an outpatient surgery.
Why is CMC joint so painful?
Why it is so painful is because the hand is highly innervated and occupies a large amount of sensory motor space in the brain. The CMC joint is a saddle joint and is the second most mobile joint in the human body. Often simple tasks involving the thumb create pain.
How do you fix a CMC joint?
Summary. CMC joint arthroplasty is a surgical procedure used to replace the trapezium bone of the thumb joint with a tendon graft, or a silicone or metal implant to treat carpometacarpal joint osteoarthritis after conservative treatments fail to relieve symptoms.
Can you break your CMC joint?
A Bennett’s fracture is the most common fracture of the thumb. The CMC joint is a highly mobile joint that is responsible for the gripping and pinching actions of the hand. A Bennett’s fracture can result in: Thumb and wrist pain weakness.
Can you fracture your CMC joint?
X-rays can show the condition of your bones and what is happening at the joint. If you fracture the CMC joint you will most likely be cast to immobilize the joint and allow the fractured bone to heal. It is important to treat an injury to this joint immediately and thoroughly to help prevent the onset of arthritis.
What is the recovery time for CMC surgery?
The surgery is typically performed on an outpatient basis, and you will go home the same day. After surgery, your thumb will be placed in a cast for three to four weeks, followed by a plastic splint for four to six weeks. Typically, it takes between six and eight weeks to regain full movement in your thumb.