Is the carpometacarpal joint part of the wrist?
Table of Contents
The carpometacarpal (CMC) joints are five joints in the wrist that articulate the distal row of carpal bones and the proximal bases of the five metacarpal bones.
What is carpometacarpal?
The base of the thumb where it meets the hand is called the carpometacarpal (CMC) joint. This joint allows the thumb to move freely in many directions. It also provides strength so the hand can grasp and grip. A smooth tissue called cartilage lines and cushions the bones of the CMC joint.
What is the joint between thumb and wrist?
The CMC joint is located where the thumb (metacarpal) bone meets the wrist (carpal) bone. As this joint becomes worn, often due to age, it can lead to a painful condition called thumb arthritis (also known as CMC arthritis or basal joint arthritis).
What joints are in the hand?
Bones
- metacarpophalangeal joint (MCP) – the joint at the base of the finger.
- proximal interphalangeal joint (PIP) – the joint in the middle of the finger.
- distal interphalangeal joint (DIP) – the joint closest to the fingertip.
What type of joint is the carpometacarpal joint?
The carpometacarpal (CMC) of the thumb is a saddle joint that permits a wide range of motion and is largely responsible for the characteristic dexterity of human prehension. This joint, located at the very base of the thumb, is subject to large physical stresses throughout life.
What is the STT joint in the hand?
The biomechanics of STT joint is not completely understood. It is a dome-shaped joint found on the radial side of the wrist. It is involved with thumb movement and transfer of load from the thumb and radial side of the hand to the scaphoid and the radioscaphoid and scaphocapitate joints.
Is carpometacarpal a saddle joint?
What causes carpometacarpal joint?
Thumb arthritis is common with aging and occurs when cartilage wears away from the ends of the bones that form the joint at the base of your thumb — also known as the carpometacarpal (CMC) joint.
Where is the carpometacarpal joint located?
hand
The carpometacarpal (CMC) joints of the hand form the articulation between the distal row of carpal bones and the bases of the five metacarpal bones. These joints are positioned at the extreme proximal region of the hand (see Figs. 7.3 and 7.4).
Is the carpometacarpal joint a saddle joint?
What is osteoarthritis of first carpometacarpal joint?
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 carpometacarpal joint of the thumb?
Carpometacarpal joint. The carpometacarpal (CMC) joints are five joints in the wrist that articulate the distal row of carpal bones and the proximal bases of the five metacarpal bones. The CMC of the thumb differs significantly from the other four CMCs and is therefore described separately.
What is carpometacarpal joint arthroplasty?
What Is It? Carpometacarpal joint arthroplasty is a surgical procedure in which the trapezium, one of the carpal bones of the wrist that forms part of the thumb joint, is removed and replaced with an implant.
What is Carpometacarpal bossing and osteoarthritis?
Osteoarthritis of the carpometacarpal joints is a type of joint disease that results from breakdown of joint cartilage and underlying bone. When it affects the thumb it is termed trapeziometacarpal osteoarthritis. Carpometacarpal bossing is the presence of a small immovable protuberance over the joint.
What causes pain in the carpometacarpal joint?
Arthritis: Over time, wear and tear of the carpometacarpal joint can cause arthritis and joint deterioration. Osteoarthritis, in particular, can result from wear and tear at the joint, causing the cartilage to become rough. When this occurs, the bones don’t glide gently and moving your thumb may be difficult and painful.