PURPOSE To comparative analysis of clincal difference between reamed and unreamed interlocking intramedullary nailing in the treatment of femoral and tibial shaft fractures. MATERIALS AND METHODS We reviewed femoral and tibial shaft fracture who were treated with reamed or unreamed nail. They were followed for a minimum of 16 months. Winquist-Hansen and Johner-Wruhs criteria were applied for the classification of the fractures. Retrospectively we evaluated the duration of operation, the amount of bleeding, the first time of callus formation, union time, the time of partial weight bearing, isthmic ratio, complications. RESULTS The average duration of operation for femoral fractures with reamed and unreamed nail were 104 minutes, 95 minutes, respectively. And those for tibial fractures were 96 minutes, 87 minutes, and the difference was statistically significant (p<0.05). The amount of bleeding in femoral fractures with reamed and unreamed nail were 360 ml, 223 ml, respectively. And those in tibial fractures were 280 ml, 205 ml, respectively, and the difference was statistically significant (p<0.001). The isthmic ratio in femoral fracture with reamed and unreamed nail were 105.5%, 87.0%, respectively and those in tibial fracture were 106.3%, 85.3%, respectively. There were 2 delayed unions in femoral fractures and 1 delayed union in tibial fracture with unreamed nail, and 1 metal failure in tibial fracture with unreamed nail. CONCLUSION Unreamed femoral intramedullary nailing involves fewer steps and less intraoperative blood loss than reamed nailing. There was no statistical difference the first time of callus formation, union time, the time of partial weight bearing. It must be consider that delayed union and metal failure in the unreamed intramedullary nailing due to high grade fracture, lower isthmic ratio, combined with multiple trauma.
The authers reviewed 15 patients of open fracture of the tibial shaft who were treated by external fixation followed by intramedullary nailing. These fractures comprised two Type-I, two Type-II, four Type-IIIa, and seven Type-IIIb injuries. Ten patients were treated with unreamed intramedullary nailing and 5 patients were treated with reamed intramedullary nailing. The results were analyzed as followings: 1. All fractures had union at 5.2 months after intramedullary nailing and 4 true osteomyelitis were developed. 2. All osteomyelitis were developed for the patients who were treated with reamed intramedullary nailing. 3. There was no osteomyelitis who were treated with unreamed intramedullary nailing. 4. Delayed conversion to intramedullary nailing after control of pin tract infection had no effect for prevention of osteomyelitis.
For the treatment of tibial shaft fracures interlocking intramedullary nailing has been used widely. Recently choosing between reamed or unreamed interlocking nailing for closed tibial shaft fracture is still controversial. The purpose of this study is to evaluate the results and complications of unreamed interlocking nailing for closed tibial shaft fractures. We reviewed 28 closed tibial shaft fractures that were treated with unreamed static medullary nailing from May 1993 to December 1996 at the Deparment of Orthopaedic surgery, Pohang St. Mary's Hospital. The results were as follows 1. In all 28 cases, union of the fracture was achieved at average 19.6 weeks and tere was no malunion. 2. We performed additional procedures in 4 cases(14.3%) for union : autogenous iliac bone graft in 1 case(3.5%) that was unstable segmental fracture and dynamization in 3 cases(10.7%) 3. There was breakage of distal locking screw in 1 case but no breakage of intramedullary nail.