The mechanism of the damage of the sesamoid bones of the pollex could be a violent hyperextension or an abduction of the pollex and less frequently a direct injury 2, 3. Fractures of the sesamoid bones of the pollex, are treated with immobilization of the thumb for a short period, and this results to a quick recovery of the injury 4, 5. Three cases of sesamoid bone pathology are presented, including two cases of sesamoid fracture and a case of sesamoid periostitis. The literature is reviewed. Sesamoid bones probably function in the body as pulleys. Most people have five sesamoid bones in each hand. Two at the thumb Cited by: 74.
Sesamoid bones of the hand. Most people have 5 sesamoid bones in each hand: 2 at the thumb metacarpophalangeal (MCP) joint, 1 at the interphalangeal joint of the thumb, 1 at the MCP joint of the index finger, and 1 at the MCP joint of the small finger. 6 Traumatic, inflammatory, and arthritic conditions can affect the sesamoid bones of the hand. Fractures of the sesamoid bones of the thumb Sesamoid fractures of the metacarpophalangeal joint of the thumb may be classified into two types: (1) with palmar plate intact, and (2) with palmar plate ruptured. In type 1, the patient maintains a normal flexion posture of the metacarpophalangeal joint as well as the ability to flex the Cited by: 19.
As you probably know by now, sesamoiditis refers to an inflammatory process affecting the sesamoid bones of the thumb. The sesamoid bones are two pea-sized bones embedded in the volar plate of the thumb. The volar plate is actually a very thick ligament that prevents hyperextension of the joint.