抄録
In a prospective semi-ramdomized study, the Hansson pin technique for internal fixation of fractures of the femoral neck was compared with the cannulated cancellous hip screw technique (CCHS). The series consisted of 121 patients followed clinically and radiographically over 4 months, 101 women and 20 men, with a mean age of 77.7 years. There were 63 patients treated with Hansson and 53 with CCHS.
Fourteen complications had occurred, 10 in the Hansson and 4 in CCHS (p<0.05). The incidence of nonunion were 3 cases (5.7%) in CCHS and 8(12.7%) in Hansson. One (1.9%) of CCHS and 2(3.2%) of Hansson were found cut out of screw or migration. In Hansson,7 of 35(20.0%) of the Garden’s stage III or IV were found complications and in CCHS,3 of 41(7.3%) were found (p<0.05). Eight of 10 complicated cases in Hansson showed varus and rotation deformity. This displace pattern was called “Chop stick phenomenon” and we need be careful for this.
We conclude that on the basis of our experience and results, the cannulated cancellous hip screw technique gave better results than the Hansson pin technique for internal fixation of femoral neck fractures of the Garden’s stage III or IV.
