Abstract
Introduction
The sliding hip screw is the implant of choice for the operative treatment of stable trochanteric femur fractures. Surgeons have been using widely the four-hole side plate DHS (Dynamic Hip screw) with four bicortical screws, which allows adequate weight bearing after operation. However, there is lacking of scientific studies that support the use of such long plate and we question ourselves if we can accomplish the same results with the use of a smaller plate. The objective of this study is to compare the results accomplished with a four-hole and a two-hole DHS side plate in the treatment of transtrochanteric fractures.
Material and Methods
This study included 140 patients (43 male and 97 female) that had stable transtrochanteric fractures between 1/01/2005 and 31/12/2008 and were submitted to osteossynthesis with DHS side-plate. 32 (22.9%) were treated with a two-hole DHS (group DHS2) and 108 (77.1%) with four-hole. The fractures were evaluated according to the AO/OTA classification and Evans for stability. The fracture reduction was assessed according to Sernbo criteria and was recorded also patient demographics, fracture patterns and fixation, comorbilities, mortality rate, capacity of ambulation and complications.
Results
The patients had in medium 77.74 ± 49.52 years and 18 months of follow-up (range 6–36 months). Both groups had similar patient demographics. The etiology of the fracture was fall in 120 (85.7%) and 20 (14.3%) from traffic accident, 10 (7.1%) were patological. 15 (10.7%) died during hospital stay: 13 (12.0%) in DHS4 group and 2 (6.3%) in DHS2. In terms of capacity of ambulation in the group DHS2 15.6% didn't ambulate and 25% had walking aid; in the group DHS4 20.4% didn't ambulate and 29.7% had walking aid. Concerning fracture reduction there was varus (<125°) in 9.4% of DHS2 group and 9.3% in DHS4. Also in the group DHS4 there were 15 (13.9%) complications: 3 cut-out, 3 device failure, 8 infections and 1 pseudarthrosis. In the group DHS2 there were 4 (12.5%) complications: 1 cut-out, 2 infections and 1 device failure. 121 (28 group DHS2 and 93 group DHS4) fractures healed without complications in anatomical position with good function of the hip joint.
Discussion
We found no significant differences between the two groups regarding reduction or percentage of complications. However we could observe that in the group DHS2 there was a lesser rate of mortality during hospital stay and a higher capacity of ambulation without walking aid.
So the fixation of stable transtrochanteric fractures with a two-hole DHS side-plate is safe, less invasive, less surgical time and less blood loss than a four-hole. As our study reveled in these stable fractures there is lacking of benefit with the use of a larger slide-plate, the two-hole is adequate and its use should be increasing in our clinical practice.
