Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Single column locking plate fixation is inadequate in two column acetabular fractures. A biomechanical analysis | Khajavi et al. Journal of Orthopaedic Surgery and Research 2010 5 30 http content 5 1 30 éHMÌ JOURNAL OF ORTHOPAEDIC MBs SURGERY AND RESEARCH RESEARCH ARTICLE Open Access Singh e column locking plate fixation is inadequate in two column acetabular fractures. A biomechanical analysis Kiarash Khajavi 1 ArthurT Lee1 Derek P Lindsey2 Philipp Leucht 1 Michael J Bellino1 and Nicholas J Giori2 Abstract Background The objective of this study was to determine whether one can achieve stable fixation of a two column transverse acetabular fracture by only fixing a single column with a locking plate and unicortical locking screws. We hypothesized that a locking plate applied to the anterior column of a transverse acetabular fracture would create a construct that is more rigid than a non-locking plate and that this construct would be biomechanically comparable to two column fixation. Methods Using urethane foam models of the pelvis we simulated transverse acetabular fractures and stabilized them with 1 an anterior column plate with bicortical screws 2 an anterior locking plate with unicortical screws 3 an anterior plate and posterior column lag screw and 4 a posterior plate with an anterior column lag screw. These constructs were mechanically loaded on a servohydraulic material testing machine. Construct stiffness and fracture displacement were measured. Result and Discussion We found that two column fixation is 54 stiffer than a single column fixation with a conventional plate with bicortical screws. There was no significant difference between fixation with an anterior column locking plate with unicortical screws and an anterior plate with posterior column lag screw. We detected a nonsignificant trend towards more stiffness for the anterior locking plate compared to the anterior non-locking plate. Conclusion In conclusion a locking plate construct of the anterior column provides less stability than a traditional both column construct with posterior plate and
