What type of joint is the 1st Carpometacarpal?
double saddle joint
Joint Anatomy The first CMC joint is a bi–sellar—a double saddle joint formed by the distal articular surface of the trapezium and the base of the first metacarpal.
What types of movements are possible in the first carpometacarpal joint?
For ease of orientation, the thumbnail can be considered as resting in the thumb’s frontal plane. Abduction and adduction of the first CMC (and MP) joint(s) occur in this plane; flexion and extension of the first CMC, MP, and IP joints occur in a plane that is perpendicular to the thumbnail.
What is 1st Cmcj arthritis?
Pain at the base of the thumb is very common. Joint pain stemming from the 1st CMC joint is one of the most common areas in the hand to develop arthritis, which is inflammation and pain resulting from cartilage loss. The 1st CMC (carpometacarpal) joint is a specialized saddle-shaped joint at the base of the thumb.
What is Carpometacarpal osteoarthritis?
Carpometacarpal osteoarthritis is a degenerative condition of the hand that causes pain, stiffness and weakness. It is the second most common site of degenerative disease in the hand after arthritis of the distal interphalangeal joints.
What is the first Carpometacarpal?
The 1st CMC (carpometacarpal) joint is a specialized saddle-shaped joint at the base of the thumb. The trapezium carpal bone of the wrist and the first metacarpal bone of the hand form the 1st CMC or thumb basal joint.
What makes carpometacarpal joint #1 different from the other Carpometacarpal joints?
The CMC joints are connections between the distal surfaces of the four distal carpal bones and the surfaces of the metacarpal bases of the medial four metacarpal bones. These aspects make the second CMC joint quite distinct because it is the only one to have three carpal bones involved in forming the articulation.
What is the first thumb joint called?
The thumb basal joint, also known as the carpometacarpal (CMC) joint, is a specialized saddle-shaped joint that is formed by a small wrist bone (trapezium) and the first of the three bones in the thumb (metacarpal).
What does CMC joint stand for?
The thumb carpometacarpal (CMC) joint, a biconcave-convex saddle joint, consists of the articulation between the first metacarpal of the thumb and the trapezium carpal bone.
What are the four stages of osteoarthritis?
The four stages of osteoarthritis are:
- Stage 1 – Minor. Minor wear-and-tear in the joints. Little to no pain in the affected area.
- Stage 2 – Mild. More noticeable bone spurs.
- Stage 3 – Moderate. Cartilage in the affected area begins to erode.
- Stage 4 – Severe. The patient is in a lot of pain.
What is osteoarthritis of the first carpometacarpal joint?
The first carpometacarpal (trapeziometacarpal) joints are a frequent site of osteoarthritis in postmenopausal women. This osteoarthritis, which is typically bilateral both clinically and roentgenographically, may be mistaken for tenosynovitis unless its characteristic features are recognized.
Which is the first metacarpal bone of the thumb?
This joint is formed by the trapezium bone of the wrist and the first metacarpal bone of the thumb. Because of its relative instability, this joint is a frequent site for osteoarthritis. Carpometacarpal osteoarthritis (CMC OA) of the thumb occurs when the cushioning cartilage of the joint surfaces wears away, resulting in damage of the joint.
What are the symptoms of carpometacarpal thumb osteoarthritis?
A joint with osteoarthritis Common symptoms of CMC OA Pain:Usually felt as a sharp or aching pain at the base of the thumb. The pain is usually worse during movement and relieved by rest. Reduced grip strength:It may be difficult to grip or pick up objects. Stiffness:Following periods of rest (eg in mornings). Swelling:Around the base of the thumb.
Where are the carpometacarpal ligaments located on the hand?
The palmar carpometacarpal ligaments, located on the palmar aspect of the hand, are very similar to their dorsal counterparts. The only exception is the third metacarpal base, which receives three ligamentous bands; a lateral one from the trapezium/trapezoid, an intermediate one from the capitate and a medial one from the hamate.