Kinematics of the triangular fibrocartilage complex during forearm rotation in vivo / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate three-dimensional kinematics of the superficial and deep portion of triangular fibrocartilage complex (TFCC) in different parts of the forearm rotation.</p><p><b>METHODS</b>Six wrists of 6 volunteers were used to obtain CT scans at different positions of the wrist. The wrists were scanned from 90 degrees of pronation to 90 degrees of supination at an interval of 30 degrees. The 3-dimensional radius and ulna were reconstructed with customized software and changes in length of the superficial and deep portion of TFCC during forearm rotation.</p><p><b>RESULTS</b>In forearm pronation, the superficial dorsal portion and the deep palmar portion of the TFCC were tight. While the superficial palmar portion and the deep dorsal potion of the TFCC were lax. In supination, the changes in length of all these fibers were reverse.</p><p><b>CONCLUSIONS</b>In forearm rotation one portion fibers of dorsal TFCC and one portion fibers of palmar TFCC are tight, and this mechanism controls stability during DRUJ rotation.</p>

Measurements of parameters of posteroanterior X-ray films of distal radial fracture and their significance / 中华外科杂志

<p><b>OBJECTIVE</b>To provide the basic knowledge of wrist joint for diagnosing of these morphological change in pathological condition by measuring the posteroanterior X-ray films of different types of distal radius fracture by AO classification.</p><p><b>METHODS</b>Eleven radiographic indexes were measured including following 7 new parameters of 83 cases of distal radius fracture: ulnar styloid length (USL), ulnar head length (UHL), ulnar head diameter (UHD), maximal distal radius width (MDRW), proximal distal radius width (PDRW), sigmoid notch length (SNL) and sigmoid notch width (SNW) by Pacs system in standard X-ray films. The indexes were defined by the ratio of these parameters to the length of the third metacarpal. Statistical significance of indexes and correlations of parameters were analyzed by SPSS 16.0.</p><p><b>RESULTS</b>It was found that indexes of 11 parameters and 27 pairs of indexes had significantly different. Compared the indexes of 14 groups with normal group existed statistical significance, 62 pairs value of 11 parameters had correlations.</p><p><b>CONCLUSION</b>The study provides additional radiographic index that will be helpful to more careful diagnosis and treatment of the distal radius fractures and their associated injuries such as ulnar wrist injuries or carpal instability.</p>

Free medial sural artery perforator flap for the tissue defect in the upper or lower limbs / 中华显微外科杂志

Objective To report 11 cases with the tissue defects of their upper or lower limbs repaired with the anastomsed medial sural artery perforator flaps.Methods The free medial sural artery perforator flaps,with length of 8 cm to 15 cm and width of 6 cm to 14 cm were used for tissue defect reconstruction of the distal upper or lower limbs in 11 cases,including 6 females and 5 males.The flap was harvested from the ho- mo-lateral calf,confined between the posterior-medial edge of the tibia and the middle line of the calf and a- bove the distal half part of the medial sural muscle,with a same axis of this muscle.Results Ten cases survived very well,which was relatively thin,and the donor site can be acceptable.One case resulted in a complete flap necrotized and covered with a split skin graft.No obvious motor function defect was observed of the donor leg.Conclusion The anastomsed medial sural artery perforator flap is alternative donor flap for the upper or lower limb tissue defect repair,especially for the defect in the hand or foot.