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The aim of the study was to investigate the effect of smoking on the operative treatment of established non-union of the carpal scaphoid. Case notes and radiographs of patients undergoing bone grafting and screw fixation of scaphoid non-unions were reviewed. There were 34 patients that had undergone 37 operations for established non-union of the carpal scaphoid bone. There were two female patients, and the average age was 26.8 years (range 13.4 years to 52.9 years). The median delay to operation was 11.9 months. The overall success rate of the operation (internal fixation and autologous bone grafting) was 59.5% (22/37), but there was a significant association between non-union and smoking (P=0.02 for Fisher's exact test). In non-smokers (n=17) the success rate was 82.4%, but this dropped to 40.0% among smokers (P&lt;0.01). We concluded that smoking was significantly associated with failure of operative treatment of established non-union of the scaphoid bone.

Smoking increases failure rate of operation for established non-union of the scaphoid bone