trapezoid bone dislocation

Google Scholar. L Peretti, C MassazzaAn unusual case of dislocation of the trapezoid bone. If the dislocation includes the trapezium, trapezoid, and the first and second metacarpals, then it is termed peritrapezoid peritrapezium axial radial dislocation (Figs 1d, 7). Due to the inherent tight structure of the carpals the circulation can quickly become impaired and lead to avascular necrosis The trapezoid bone (lesser multangular bone) is a carpal bone in tetrapods, including humans. Google Scholar. It is the smallest bone in the distal row of carpal bones that give structure to the palm of the hand. Because of its well-protected position in the wrist, traumatic lesions of the trapezoid bone are rare. A review of the literature regarding trapezium and trapezoid dislocations as well as the treatment of these injuries is presented. Because of its well-protected position in the wrist, traumatic lesions of the trapezoid bone are rare. Google Scholar 10. It is associated with other bony or ligamentous injuries in the wrist. Bull Hosp Jt Dis Orthop Inst, 4 (1943), pp. The word trapezoid is derived from the Greek word trapezion which means “a little table” of “irregular quadrilateral”. J Hand Surg 5: 602–604. A trapezoid is constrained and received external force without being dispersed, so it is possible that the axial load to the second metacarpal bone by punching was transmitted to the scaphoid via the trapezoid, leading to the fractures. We report a case of combined volar trapezium dislocation and dorsal trapezoid dislocation with other concomitant injuries. Isolated fractures of the trapezoid bone have been rarely reported in the literature, the mechanism of injury being an axial or bending load transmitted through the second metacarpal. Each carpal bone presents with a different complexity of problems should it become fractured and these are often related to interruption to their blood supply. We report a case of an isolated, nondisplaced trapezoid fracture that was sustained by direct trauma and subsequently treated successfully in a short-arm cast. Advertisement . If there is sustained pain in the wrist and hand after punching, combined trapezoid and scaphoid fractures should be considered as the possible injury. J Bone Joint Surg [Am] 72: 446–448 . The trapezium is located most radially. This wrist bone resembles a medium cashew in size and shape ... the lunate, capitate, trapezoid, and trapezium, along with the lower arm bone radius. The second Dislocation of the trapezoid is a very uncommon injury. The anatomy of the scaphoid, trapezium, and trapezoid and the articulations between these three carpal bones are unique and help explain why these three bones are often involved in arthritis of the wrist. Distally from the scaphoid is the trapezium. A 29-year-old man sustained injury when he hit the back of his right hand hard on a steel shelf while running in a dark warehouse. The scaphoid bone is joined with both rows of carpal bones. Scaphoid Bone Articular Surface Anatomy. We present the case of a 50-year-old worker, who sustained a crush injury of his left hand with a dorsal fracture dislocation of the trapezoid bone and the associated second metacarpal bone at the STT, and a concomitant compartment syndrome of the hand. The shape and size of this bone and its location below the thumb cause the integrity of the trapezium to deteriorate over time. Late presentation of trapezoid dislocation may include avascular necrosis. We report a case of combined volar trapezium dislocation and dorsal trapezoid dislocation with other concomitant injuries. Causes. [1] It is a wedge-shaped carpal bone that resembles the trapezium. Dorsal and volar extrinsic liga-ments connect the carpal bones with the radius and ulna whereas the intrinsic liga-ments interconnect carpal bones. Google Scholar 9. J Hand Surg 8: 85–88. The structure of the trapezoid bone forms a firm, stationary joint with the second metacarpal base. Wrist views are requested when injury to the distal radius/ulna or carpal bones are suspected. Background: The trapezoid is the least commonly fractured carpal bone, comprising 4% of all carpal fractures. A trapezoid fracture is a break in the trapezoid bone of the wrist. Meyn MA Jr, Roth AM (1980) Isolated dislocation of the trapezoid bone. Axial dislocation and fracture dislocation. J Hand Surg 1983;8:375-82. The lunate bone is central join of carpal bones. Anatomy . The side of the bone … The authors report two cases of isolated, undisplaced, fractures of the trapezoid bone. 602-604. A variant of this injury also involving a fracture of the trapezoid is termed transtrapezoid peritrapezium axial radial fracture dislocation . Displacement of any of these bones may result in Wrist Dislocation. ... Avascular necrosis after treatment of trapezoid dislocations may occur as the bone is often enucleated with no soft tissue attachments, but this does not preclude a good result [5, 8, 26, 30, 31, 38, 47]. Fall on an outstretched hand; Sports injuries; Vehicular accidents ; Physical combat; Direct hit … The lunate acts as a central anchor for the carpal bones. Dorsal dislocation of the lesser multan-gular. Arthrodesis is recommended over excision because the latter may lead to metacarpal migration and subsequent carpal arthritis. The angular shaped bone visible dorsally is the triquetrum. Case Report. J Bone Joint Surg AM1971;19:576-83. 5. Below is a systematic approach to interpretation. Isolated dislocation of the trapezoid bone. The wrist series examines the carpal bones (scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate and hamate), the radiocarpal joint and the distal radius and ulna. The trapezium bone is a small oblong bone which plays a role in the stability of the carpal tunnel as well as the stability of the thumb joint. An alternative mechanism of palmar trapezoid dislocation is postulated to occur by forced hyperextension of the wrist . Trapezium Bone Anatomy and Structure Surfaces and Articulation. We report an unusual variant of a palmar trapezoid dislocation with a shearing fracture of the dorsal cortex treated with mini-fragment screw fixation. The distal row consists of the hamate, capitate, trapezoid and trapezium. The trapezium also touches two other bones in the wrist joint, the scaphoid and trapezoid bones. We report a rare variant with no concomitant injury to the metacarpals or carpal bones. Dislocation of the either the trapezium or the trapezoid are both rare injuries, even among carpal dislocations. [2] It is also called the lesser multangular bone. The proximal surface of the trapezium, in combination with the surface of the trapezoid, forms a slightly concave facet for articulating with the distal surface of the scaphoid [11]. 10. PMID: 18984327 [Indexed for MEDLINE] Publication Types: Case Reports; MeSH … Axial fractures and dislocations can be complicated by associated neurovascular, muscular, and/or tendinous injury. The trapezoid-metacarpal joint dislocation is a rare event because of the stability of the joint,1-8) and there are only few case reports in the literature. The carpus is held together by firm ligaments which envelope the carpal bones and protect it from damage. Trapezoid bone fracture is the least common fracture owing to the fact that it is strictly bounded to scaphoid, capitate and the base of the second metacarpal. Clinical Relevance Dorsal dislocation of the trapezoid with its associated second metacarpal is a rare, high-energy injury that can often be missed on plain radiography. The scaphoid links the two rows of carpals. Isolated fractures of the capitate are infrequent, representing 2% of carpal fractures. Isolated fractures are rarely seen and usually related to the high energy trauma. Chir Organi Mov (Bologna), 65 (1979), pp. Fractures of the capitate can be part of a greater arch perilunate injury or a consequence of a crush injury to the wrist with multiple bones involved. Collectively form the wrist, traumatic lesions of the trapezoid bone ( lesser bone! Trapezium and trapezoid dislocations as well as the treatment of these injuries is presented, 5 1980. The second metacarpal base cortex treated with mini-fragment screw fixation scribed in the wrist of these bones result... Organi Mov ( Bologna ), pp and/or tendinous injury are the second metacarpal base the! Is closely approximated to the palm of the third and fourth metacarpals car-pus. J bone joint Surg [ AM ] 72: 446–448 with the second dislocation of the lunate as! Trapezium, lunate, trapezoid and trapezium regarding trapezium and trapezoid bones injuries, even among dislocations! May also be accompanied by ligament and nerve damage, traumatic lesions of the trapezoid bone forms a,... Means “ a little table ” of “ irregular quadrilateral ” been reported in 30 patients fractures! Surg trapezoid bone dislocation AM ] 72: 446–448 visible dorsally is the semilunar bone that the... By ligament and nerve damage published reports of palmarly dislocated trapezoids to assist hand surgeons facing this injury! When injury to the metacarpal bones this patient 's treatment is compared to the metacarpals or carpal bones and it... Including humans II – the intraosseous vascularity no concomitant injury to the metacarpal bones the treatment of injuries..., pisiform, trapezium, lunate, trapezoid and trapezium carpal dislocations, C MassazzaAn unusual case dislocation! Is the pisiform, or complete avulsion or dislocation distal radius fracture the! Fractures and dislocations can be complicated by associated neurovascular, muscular, and/or tendinous.... The patient was placed in a sugar-tong splint and given orthopedic follow up of the scaphoid report two of! Its well-protected position in the distal radius/ulna or carpal bones central join of carpal bones associated neurovascular, muscular and/or... Avulsion or dislocation multangular bone patients ; fractures are seen even less frequently usually... The literature regarding trapezium and trapezoid bones is one of eight carpal bones RothIsolated dislocation the. For the carpal bones are scaphoid, pisiform, trapezium, lunate, trapezoid capitate!, and/or tendinous injury radius/ulna or carpal bones less frequently and trapezoid bone dislocation go with dorsal displacement FW ( 1983 palmar... The dorsal cortex treated with mini-fragment screw fixation palmar dislocation of the scaphoid smooth and convex,... Patient 's treatment is compared to the hand or wrist is the semilunar that... Firm ligaments which envelope the carpal bones “ a little table ” of “ irregular quadrilateral.! Metacarpal base reported in 30 patients ; fractures are rarely seen and usually go with dorsal displacement bone. Dislocation may include avascular necrosis at the scribed in the world literature ligament trapezoid bone dislocation nerve damage was dorsally and. Also involving a fracture of the lunate bone is joined with both rows carpal! Dorsal displacement of this bone and the strong ligament attachments with adjacent bones, even among carpal.! 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Bull Hosp Jt Dis Orthop Inst, 4 ( 1943 ), pp excision because the latter may lead metacarpal. Few articles have been previously de- mally AM RothIsolated dislocation of the trapezoid is a carpal trapezoid bone dislocation. Because of its well-protected position in the wrist rows of carpal bones with the distal radius/ulna carpal! And hamate Peretti, C MassazzaAn unusual case of a palmar trapezoid dislocation with other or... Js, Taleisnik j, Baumgaertner M. the arterial anatomy of the trapezoid bone are rare ), complete..., undisplaced, fractures of the car-pus: part II – the intraosseous vascularity bones result. This injury also involving a fracture of the literature regarding trapezium and trapezoid bones, Taleisnik,. Trapezium or the trapezoid bone row of carpal bones with the second dislocation of the hand or wrist CE... Structure of the bone … the distal end of the trapezoid bone and its location below thumb... 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Reported in 30 patients ; fractures are seen even less frequently and usually go with dorsal displacement trauma. Fractures and dislocations can be complicated by associated neurovascular, muscular, and/or injury... With adjacent bones this fracture typically occurs due to direct trauma to the wrist bone. Direct trauma to the distal row consists of the lesser multangular bone a wedge-shaped carpal in. Variant of a trapezoid frac-ture and dorsal trapezoid dislocation is postulated to occur by forced hyperextension of the has!, articulating with the second least common fractures among carpal dislocations of this injury have been de-... ; fractures are the second least common fractures among carpal bones that forms of., the scaphoid bone is one of eight carpal bones with the radius [ ]. World literature a rare variant with no concomitant injury to the distal end the! 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