Claes L, Hutzschenreuter P, Pohler O
Arch Orthop Unfallchir. 1976 Jul 23;85(2):155-9. doi: 10.1007/BF00415453.
The experiment was performed on 17 sheep tibiae in vivo. 4.5 mm ASIF leg screws with a constant insertion torque (68.6 Ncm) but different surfaces (smooth or rough) were removed after 3 s, 7, 28, 56 and 112 days after insertion. The screws with a rough surface which were implanted for 28 days and longer exhibited a significantly greater removal torque. For instance rough screws which were implanted for 112 days displayed a removal torque eight times greater than after 3 s.
该实验在17只羊的胫骨上进行。将具有恒定插入扭矩（68.6牛厘米）但表面不同（光滑或粗糙）的4.5毫米ASIF腿部螺钉在插入后3秒、7天、28天、56天和112天后取出。植入28天及更长时间的粗糙表面螺钉表现出明显更大的取出扭矩。例如，植入112天的粗糙螺钉的取出扭矩比插入后3秒时大八倍。
