Reconstruction of a phalangeal bone using a vascularised metacarpal bone graft nourished by a dorsal metacarpal artery
ABSTRACT We report on a patient with an infected nonunion of the left little-finger phalanges following a gunshot injury. The defect was treated by transplanting a partial fifth metacarpus, vascularised by the fourth dorsal metacarpal vessels. Bone union was obtained 6 months after surgery and no signs of infection were found at the site of the nonunion. Although the range of the interphalangeal joints of the finger was limited, the patient was satisfied because the preserved little finger had a metacarpophalangeal (MP) joint with unrestricted motion.
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ABSTRACT: Large segmental defects of long bones comprise a complex pathology resulting from a variety of aetiologies. Their prolonged, painful and uncertain treatment is usually beset with a range of consequences for the patient, varying from the psychological to the socioeconomic. Trauma, osteomyelitis, bone tumour resections or treatment of congenital deformities are main causes of bone deficiency. Their treatment has been thoroughly studied for the last 35 years and both vascularized bone grafting and distraction osteogenesis with the Ilizarov technique have emerged as gold standards. Novel techniques have arisen during the last 10 years, giving new perspectives to the management of this problem. Intramedullary lengthening devices, bioactive membranes, osteogenic proteins and tissue engineering are the new weapons in the armamentarium of orthopaedic surgeons. This study describes the aforementioned treatment techniques (classic and novel) and elaborates on their indications, advantages/disadvantages and complications. Algorithms for the assessment and treatment of critically size long-bone segmental defects are also proposed.Orthopaedics and Trauma 04/2010; 24(2):149-163. DOI:10.1016/j.mporth.2009.10.003
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ABSTRACT: Well-known advantages of vascularized bone grafts led us to determine the anatomical basis of a metacarpal vascularized bone graft to find a solution for distal index bone loss. Seventeen adult human hands from fresh cadavers were dissected and analyzed. For each hand, we studied the second dorsal metacarpal artery, the ulnar dorsal proper digital artery of index, and the ulnar palmar proper digital artery of the index. Location, diameters, origins, and anastomoses were observed, and at the end, the vascularised bone graft was raised. The second dorsal metacarpal artery was present in all hands, always arising from the dorsal carpal arch with a 1-mm mean diameter. The ulnar dorsal proper digital artery of index was isolated on all dissections, with a subcutaneous location on the ulno-dorsal side of the proximal phalanx. The mean diameter of ulnar dorsal proper digital artery at the level of index proximal phalanx was 0.4 mm. We found anastomotic branches between the ulnar dorsal and palmar proper digital artery of index at the level of the proximal phalanx which permitted us to elevate a vascularised bone graft. We succeeded in removing the graft in all specimens. Its pivot point was always more distal than the middle of the proximal phalanx. The arc of rotation allowed the graft to reach the distal phalanx in 80% of the cases. This anatomical study has demonstrated the theoretical possibility of a reversed pedicled bone graft taken from the ulnar neck of the second metacarpal. This graft brings the following benefits: (a) the use of a minor vascular axis, (b) a surgical technique with a dorsal approach allowing the elevation and the use of the graft at the same time. It can be used on the index for failures of DIP joint arthrodesis, huge chondroma, or traumatology.Anatomia Clinica 05/2010; 32(8):719-23. DOI:10.1007/s00276-010-0676-7 · 1.05 Impact Factor
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ABSTRACT: This study describes pseudoarthrosis of the proximal phalanx of the little finger and its successful treatment using a free vascularized genicular osseous-periosteal flap. Since this thin and pliable flap can be harvested as a small vascularized unit, it is ideal for the treatment of phalangeal pseudoarthrosis.Hand 03/2011; 6(1):98-101. DOI:10.1007/s11552-010-9299-z