Abstract
Displaced intra-capsular fractures of femoral neck are treated by osteosynthesis in young adults. Using a standard protocol, we have compared the results of internal fixation after closed (CRIF) and open reduction (ORIF) in these patients. We have also studied the risk factors that influence non-union and avascular necrosis (AVN).
Patients in the age group of 15–50 years, who were scheduled for internal fixation within 1 week of injury, were randomized into two groups, one for closed reduction and the other for open reduction. The two groups were compared for factors such as age, gender, time of surgery and posterior comminution as well as union and complications. Using univariate and multivariate methods the factors influencing non-union and AVN were analyzed.
The average duration of surgery in patients undergoing CRIF was less than half of that in the ORIF group. The rates of union (p=0.93) and avascular necrosis at 2 years (p=0.85) were comparable. Rates of complications like deep vein thrombosis and infection were also found to be comparable. Guide wire breakage was found in 2 patients undergoing CRIF. Posterior comminution, poor reduction and improper screw placement were the major factors influencing non-union. An accurate reduction in both the planes and placement of screws parallel or slightly divergent to each other had a positive influence on union. An overall AVN rate of 16.3% (15/92) was encountered and it was not influenced by any of the factors. A delay of more than 48 hrs in surgery did not influence the rates of union or AVN.
Conclusion: Both CRIF and ORIF are credible methods of treatment. Although the duration of surgery in CRIF is less than ORIF, the added time taken in achieving the reduction on the fracture table may actually make the whole procedure longer than ORIF. Posterior comminution, early loss of reduction and convergent screw placement are leading reasons for non-union.
The abstracts were prepared by Mr Tim Briggs. (Editoral Secretary 2003/4) Correspondence should be addressed to him at Lane Farm, Chapel Lane, Totternhoe, Dunstable, Bedfordshire LU6 2BZ, United Kingdom
