A reinforced rigid fixation device for unstable intertrochanteric fractures

A 120 degrees blade plate reinforced by a strut is introduced for the treatment of unstable intertrochanteric and proximal subtrochanteric fractures. Mechanical tests showed that the strength of this reinforced resistance device was 11,758 N. This strength is two and three times greater than that of the Gamma nail and sliding hip screw, respectively, and five times greater with the strut than without it. Three hundred fifty-eight patients older than 60 years of age were treated with this method between 1987 and 1991 (mean followup, 16 months). Six months after surgery the fracture had united in 82% of the patients who were walking without aid or using only a cane. Weightbearing began when the patient's general overall condition allowed such activity (average, 5 days; mode, 3 days). A chi squared test showed no difference regarding the results between stable and unstable fractures. Intraoperative and postoperative complication rates were 3% and 7.1%, respectively. The failure of fixation rate was 5.4%. Mechanical tests and clinical results showed that immediate weightbearing can be allowed in all types of intertrochanteric fractures. This reinforced device is effective in treating unstable intertrochanteric fractures and is especially indicated for the most unstable types (Evans' Grades 4 and 5).