the present invention relates to a graft constraint device , having the main object of constraining graft material packed into a bone defect or a space for buttressing an adjacent bone fragment , the graft material being autologous bone , allograft bone , xenograft , organic or inorganic material , &# 34 ; bone paste &# 34 ; or other similar materials . the graft constraint device has a constraint end and a fastening end , at which the device is applied to a stable bone cortex with suitable fasteners .