Lunate dislocation is also one of the most common types of wrist dislocation. The lunate bone rotates while the other wrist bones remain in place. The entry point for the anchor must be placed in such a position that the line of pull of the suture is slightly oblique, in order to resist rotational forces between both bones. It is bounded by the scaphoid radially and the triquetrum ulnarly. The lunate bone articulates with the scaphoid, the distal radius, and the TFCC. The mechanism of injury is typically a fall onto an outstretched hand with a hyperextended wrist or during a forceful push with an extended wrist. The lunate bone rotates while the other wrist bones remain in place. The lunate (arrows) dislocates volarly (anteriorly). The lateral view (Figure B) revealed volar displacement and rotation of the lunate bone (asterisk). It’s located towards the center of the wrist. A Scapho-Lunate Dissociation is a injury in your wrist. These injuries involve dislocation of the carpus relative to the lunate which remains in normal alignment with the distal radius.. Perilunate dislocation. Lunate fractures are relatively uncommon, representing about 4 percent of all carpal bone injuries . Dislocation: As there are only a few ligaments, and no muscular attachments holding the lunate in place, it is the most commonly dislocated of all the wrist bones [8]. 2. They often are not diagnosed initially and present delayed as lunate osteonecrosis, which is also known as Kienbock disease. Perilunate dislocations and perilunate fracture-dislocations are potentially devastating closed wrist injuries that are often missed on initial imaging..

… Lunate dislocation is a severe hand injury that could lead to significant complications. The lunate bone is aptly named because of its crescent shape on the lateral view (‘luna’ means moon in Latin). Two of your wrist bones, the Scaphoid and the Lunate, drift apart when an important ligament is torn (the SL Ligament). A fracture to the lunate may also be associated with injury to the TFCC. Like the scaphoid bone, the lunate also has a tenuous retrograde blood supply off of an interosseus arterial branch, and it has the same inherent risk of poor healing and AVN after injury. In the frontal projection on the left, the lunate is triangular, rather than quadrilateral, in shape (black arrow).
Perilunate dislocations and fracture-dislocations are relatively uncommon injury patterns in acute wrist trauma.

Anterior lunate dislocation. Lunate dislocation is an uncommon injury occurring in young adults due to high-energy trauma.

This is a severe injury, usually resulting from high-energy trauma. They keep our bones in alignment and they … Lunate dislocation is an uncommon traumatic wrist injury that requires urgent management and repair. Fractures to bones of the proximal row–comprising the scaphoid, lunate, triquetrum and pisiform–are most frequent. The volar displacement of the bone may result in compression of the median nerve within the carpal tunnel and is an uncommon cause of entrapment neuropathy. This type involves the lunate bone and the three ligaments around it. Specifically, it is in the center of the proximal row carpal bones (between the ulna and radius and the hand itself). This is the dislocation of the carpal bone known as the lunate. Our ligaments connect one bone to another. Lunate Dislocation. The anchor is inserted dorsally into the debrided area of the scaphoid (or in the lunate, if the ligament is avulsed from that bone). Perilunate dislocation. On the lateral projection on the right, the lunate is displaced anteriorly (white arrow) and its concave surface is directed anteriorly (toward the … Dislocated lunate are generally located around the radiocarpal joint or within carpal ligament. Perilunate and lunate dislocations result when great force is applied to a hyperextended wrist. The remainder of the carpal bones were in normal anatomic position in relation to the radius. It can be difficult to identify on frontal radiographs, but is usually a straightforward diagnosis on a lateral view (assuming the interpreter is familiar with the injury). These dislocations cause pain, swelling, and deformity in the wrist and proximal hand. Lunate dislocation. The function of the hand depends on its ability to make small movements and adjustments. However, there have been no reports of dislocated lunate over the carpal ligament. The lunate is one of the bones of the hand. They usually result from a fall on an outstretched hand or occur in a motor vehicle crash. It is sometimes associated with fractures of other carpal bones, … Lunate dislocation. Perilunate Dislocation. LUNATE AND PERILUNAR DISLOCATIONS ROLLA D.CAMPBELL, JUN., EUGENE M.LANCE and CHIN BORYEOH NEW YORK, UNITED STATES OFAMERICA Fran, theConibined Fracture Service oftheHospital for Special Surgery and theNew York Hospital andtheTrauma Service oftheRoosevelt Hospital Inhistreatise onjoint injuries Astley Cooper (1832) included only oneexample ofcarpal dislocation.
Anterior lunate dislocation. The lunate is the fourth most fractures carpal bone (following the scaphoid, triquetrum, and trapezium).