title: Possibility of the hamatum carpometacarpal joint as a new joint donor site for interphalangeal joint restoration.
abstract: OBJECTIVE
  This research investigates the anatomic basis for the repair and reconstruction of hand joints using transposition of the carpometacarpal (CMC) joint of the hamatum.
  
  
  METHODS
  The morphology and structure of the CMC joints of the hamatum and the base joints of the middle phalanx were observed on 22 freshly frozen wrist specimens at Shanghai 6th People's Hospital Research Institute of Microsurgery. The volar dorsal dia, radioulnar dia, depth of concave, and area of the joints were measured. Data were obtained through statistical analysis, and the resemblance of joints was compared in terms of morphology, structure, area, length, and diameter.
  
  
  RESULTS
  The radioulnar dia of the CMC joints of the hamatum (13.54 ± 1.15 mm) did not exhibit any evident differences in the middle phalanx of the forefinger, middle finger, and ring finger, and in the distal phalanx of the thumb. The volar dorsal dia of the CMC joints of the hamatum (10.71 ± 0.93 mm) exhibited an evident difference in the middle phalanx of the ring finger. In all fingers, the depth of the ulnar and radial concave of the CMC joints of the hamatum (1.30 ± 0.08 and 0.95 ± 0.05 mm, respectively) and the area of the CMC joints of the hamatum (139.89 ± 5.44 mm(2)) showed an evident difference.
  
  
  CONCLUSIONS
  The CMC joint of the hamatum could be considered a new and viable joint donor site that could be used to repair and reconstruct the base joints of the middle phalanx.
authors: Department of Orthopaedic Surgery, Shanghai 6th People's Hospital, Shanghai Jiaotong University, Shanghai, 200233, China.
authors: Guo-Hua
authors: GH
authors: Mei
authors: Hai-Ming
authors: HM
authors: Wang
authors: Cun-Yi
authors: CY
authors: Fan
authors: Chang-Qing
authors: CQ
authors: Zhang
authors: Bing-Fang
authors: BF
authors: Zeng
mesh_terms: D001178:Arthroplasty; D002102:Cadaver; D052737:Carpometacarpal Joints / Q000033:anatomy & histology*; D005260:Female; D005384:Finger Joint / Q000033:anatomy & histology* / Q000601:surgery; D050278:Finger Phalanges / Q000033:anatomy & histology*; D051225:Hamate Bone; D006801:Humans; D007596:Joints / Q000637:transplantation; D008297:Male; D060053:Transplant Donor Site / Q000033:anatomy & histology*
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