An ununited scaphoid fracture whose proximal fragment is small, sclerotic, fragmented, or badly deformed is usually not suitable for bone-grafting. We treated twenty-one such patients by excision of the small proximal fragment through a volar incision and the insertion of a hand-carved silicone-rubber spacer. After surgery, twenty patients (95 per cent) were able to return to work and engage in...

Introduction The anterior perilunate dislocations of the carp (PDC)are exceptional and poorly known lesions, which may go unnoticed in an emergency. They derive their importance from the severity of sequelae, which are dominated by chronic wrist instability and long-term osteoarthritis. Case Report We report the case of an open anterior PDC with no carpal fracture in a young patient. The inju...

Abstract Background Perilunate dislocations (PLD) and perilunate fracture (PLFD) are rare but severe injuries to the wrist, usually resulting from a high-energy trauma occurring in sports injuries, motor vehicle accidents, falls or machine related accidents. Treatment of choice is early reduction with carpal transfixation, fixation refixation injured ligaments. Aims As reports on mid- long-term...

The concept of carpal instability has evolved considerably over the past few years. Initially, the term ‘instability’ was considered to be synonymous with ‘malalignment’. A wrist was regarded as unstable when there was an alteration of the sagittal and/or anteroposterior alignment of the carpal bones beyond what was judged to be normal. Based on this, four major types of carpal malalignment wer...

The development of chip morphology, critical cutting conditions of serrated chip formation and cutting forces were observed and measured by high speed machining experiment for 30CrNi3MoV hardened steel. Results show that the cutting speed and rake angle are leading factors to influence chip morphology and cutting forces. With the increase of cutting speed, the continuous band chip transforms in...