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Amphiarthrosis: A Joint Type with Both Cartilaginous and Fibrous Connections

Amphiarthrosis is a type of joint that exhibits both cartilaginous and fibrous connections between the bones. It is a condition where the articular surface of one bone is partially covered by a cartilage cap, while the rest of the surface is connected to another bone by a fibrous ligament. This type of joint is found in various parts of the body, such as the wrist, ankle, and metacarpophalangeal joints.

In amphiarthroses, the cartilage cap allows for some degree of movement between the bones, while the fibrous ligament provides stability and support. The amount of movement allowed by the cartilage cap can vary depending on the specific location of the joint. For example, the wrist joint has a greater range of motion than the ankle joint.

Amphiarthroses are different from synovial joints, where the articular surface of one bone is completely covered by a cartilage cap, and from fibrous joints, where the bones are connected only by fibrous tissue. Understanding the different types of joints and their characteristics is important in diagnosing and treating musculoskeletal conditions.

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