Over a five year period, 121 forearm shaft fractures in 82 patients including nine non unions were fixed using the PC-Fix. Two patients died early; of the remaining 80 patients (119 bones) 96% were followed until bone healing. No non unions or late infections were observed in spite of the fact that no primary bone grafts were used except when treating non unions. In this clinical study with a high follow up rate using a newly developed internal fixator, encouraging overall results were achieved and the technology of monocortical locked screws was proven to be valid.