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At least 19 recordsLinked to original sources
PubMed2004

Occult fracture of the trapezoid bone: a report on two cases.

The authors report two cases of isolated, undisplaced, fractures of the trapezoid bone. Because of its well-protected position in the wrist, traumatic lesions of the trapezoid bone are rare. Dislocation of the trapezoid has been reported in 30 patients; fractures are seen even less frequently and usually go with dorsal displacement. To our knowledge and based on a Medline literature review, only two cases of acute and isolated, undisplaced or minimally displaced fractures of the trapezoid have been previously described. We believe that the lesion has often been missed in the past and modern diagnostic tools will make its diagnosis far more frequent.

Adult↗
PubMed1990

[Fracture of the trapezoid bone].

Fractures of the trapezoid body and the trapezoid ridge are rare. It is important to be aware of both diagnosis, because the trapezoid body fractures may cause persistent subluxation and degenerative arthritis in the trapezio-metacarpal joint with pain and restricted movements, and the trapezoid ridge fractures may cause chronic pain and disturbed function of the median nerve. If standard x-rays are found to be normal in a patient with symptoms of trapezoid body or ridge fracture, special oblique views or carpal tunnel views should be undertaken.

Carpal Bones↗
PubMed2000

Trapezoid bone fracture.

Fractures of the carpal bones involve only a single bone or complex bones with or without ligament rupture. However, fractures of the trapezoid are rarely seen. Because the trapezoid is fastened to the trapezium, capitate, and scaphoid by strong ligaments, fracture or dislocation is limited by this rigid fixation. The authors present a single bone fracture of the trapezoid in a 40-year-old man. A tomogram of the carpal bone was useful in diagnosing the trapezoid fracture. The mechanism for development of fracture of the trapezoid alone is unknown. However, fracture of the trapezoid seemed to occur when the wrist joint was forced with excessive flexion stress that was placed on the trapezoid through the second metacarpal bone indirectly. This occurred in the same manner that a walnut is broken with nutcrackers.

Adult↗
PubMed1998

Avascular necrosis of the trapezoid bone.

A case of idiopathic avascular necrosis of the right trapezoid is presented. The aetiology was not clear. Treatment consisted of bone curettage, autologous bone graft and revascularization with a dorsal metacarpal artery.

Adult↗
PubMed1991

[Osteoid osteoma of the trapezoid bone].

The present report describes a case of osteoid osteoma of the trapezoid. It'is an unusual localisation. Synovitis was the first clinical symptom. Tomograms allowed diagnosis and guided the treatment. Radical excision prevented recurrence.

Adult↗
PubMed2005

[Osteoma osteoid of the trapezoid bone: a case-report and review of the literature].

Osteoid osteomas are often localised in long bones but only rarely in the carpus. This is a case report of an osteoid osteoma in the trapezoid. Diagnosis was difficult and established late, due to misleading initial symptoms. Radiological examination allowed localisation of the nidus. For osteoid osteoma localised in a carpal bone, we recommend total removal without bone-graft or arthrodesis.

Adult↗
PubMed1978

[A case of open carpo-metacarpal dislocation complicated by dislocation of the trapezoid bone].

A case of open carpo-metacarpal dislocation complicated by dislocation of the os trapesium is reported in this paper. The patient's wrist healed with good functional results, despite a partial mistake in diagnosis. The authors draw attention to the fact, that X-ray films taken at admission must be analysed carefully and intraoperative X-rays films must be taken. By demonstration their own mistake in diagnosis and treatment, the authors hope that a similar mistake will be avoided. Following early open or closed reduction, a temporary wire fixation of the metacarpal bones to the carpal bones is recommended in order to prevent redislocation.

Accidents, Occupational↗
PubMed2000

The treatment of pseudoarthrosis of the scaphoid by bone grafting and three methods of internal fixation.

OBJECTIVES: To measure the rate of union in patients with pseudoarthosis of the scaphoid, treated with trapezoidal bone grafting as outlined by Fernandez and 1 of 3 methods of internal fixation and to compare unions versus nonunions and potential predictors of union to determine if associations exist. DESIGN: A retrospective radiologic study of scaphoid pseudoarthroses. SETTING: Division of Orthopedic Surgery, Ottawa Hospital, General Site, a tertiary care facility. PATIENTS: Thirty-four patients with nonunion of scaphoid fractures, treated between 1990 and 1997, with an average follow-up of 19.8 months. INTERVENTIONS: Trapezoidal bone grafting and internal fixation with Kirschner (K) wires, an AO cannulated screw or a Herbert screw. OUTCOME MEASURES: The time to union of scaphoid pseudoarthroses and predictors of union, including the classification, location of pseudoarthrosis, type of internal fixation and length of bone graft. RESULTS: The results showed a correlation between the classification and location of the fracture as determined radiologically, and the outcome. There was no correlation between the type of internal fixation used and the outcome, or between the length of the bone graft and the outcome. Twenty-three patients had radiologically demonstrated union after a mean time of 8.2 months; 16 of 24 patients achieved successful union when treated with K-wire implants, after a mean time of 7.2 months. CONCLUSIONS: Trapezoidal bone grafting and internal fixation with K wires is a practical technique, classification and location of the fracture notwithstanding. Time to union is long, and the results may be unpredictable. Use of K wires for internal fixation presents the clinician with an alternative to fixation with either the AO cannulated screw or the Herbert screw, and has the advantages of cost, ease of insertion and accessibility. This method may therefore be the treatment of choice in developing countries. Resection of the area of pseudoarthrosis must include all fibrous tissue and sclerotic bone. The length of graft, within the parameters of this study, did not affect the outcome.

Accidental Falls↗
PubMed2006

Novel approach to calvarial bone transport using a rabbit model.

Calvarial defects sometimes require cranioplasty to protect the brain. Alloplastic materials, such as acrylic resin, hydroxyapatite ceramics, and titanium, involve various problems, such as vulnerability, infection, deformity resulting from growth, and high cost. We devised a new bone transport model in the rabbit based on the distraction osteogenesis theory of Ilizarov. Twelve Japan white rabbits with a mean body weight of 2.5 kg aged 12 weeks were used. Craniectomy (7 x 14 mm) was performed in 12 rabbits. Trapezoid bone osteotomy was performed anterior to the calvarial defect in 10 rabbits. The distraction device (Extension-plates) was fixed between the trapezoid bone island and the skull. Distraction was initiated 5 days postoperatively. The device was activated once every other day, with approximately 0.75 mm or 0.5 mm per activation. Bone distraction was continued until the rod could not be moved. The lengths of distraction were 4 mm in two cases, 5 mm in one case, 6 mm in one case, and 7 mm in two cases, with a mean of 5.5 +/- 0.56 mm. Both radiographic and histological findings showed osteogenesis by intramembranous ossification and trans-chondroid bone formation. Distraction osteogenesis has potential clinical applications in cranioplasty, especially in children because usage of autogenous bone is difficult if not impossible in most cases.

Animals↗