[Experimental study of Colles' fracture combined with dorsal radio-carpal subluxation].

By cutting different ligaments and the distal end of radius of 20 fresh specimens with radiophotographic records, the author explored the mechanism of formation and traumatic anatomy of Colles' fracture with dorsal radio-carpal subluxation (DRSA). The results of experimental studies indicate that under normal condition, the change of radiolunate angle has some influence on the displacement of central point of lunate (CPL) but does not lead to DRS. The first is the rupture of the dorsal and palmar ligaments of radiocarpal joint and the second is the fracture of distal end of radius with a reversed palmar tilting angle of articular surface of distal radius. To treat the patients of Colles' fracture with DRS the previous palmar tilting angle should be restored to the full, as well as the anatomic reduction. The fixatiion in neutral or light dorsal extension position should be recommended.