Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Management of chronic lateral instability due to lateral collateral ligament deficiency after total knee arthroplasty: a case report. | Unnanuntana et al. Journal of Medical Case Reports 2010 4 144 http content 4 1 144 jA CASE REPORTS CASE REPORT Open Access Management of chronic lateral instability due to lateral collateral ligament deficiency after total knee arthroplasty a case report Aasis Unnanuntana 1 James E Murphy2 and William J Petersilge2 Abstract Introduction Lateral instability following total knee arthroplasty TKA is a rare condition with limited report of treatment options. The objective of this case presentation is to demonstrate the outcomes of different surgical procedures performed in a single patient with lateral collateral ligament LCL deficiency. Case presentation We present a case of chronic lateral instability due to LCL deficiency after primary TKA in a 47-year-old Caucasian woman with an obesity problem. Multiple treatment options have been performed in order to manage this problem including the following ligament reconstruction combined ligament reconstruction and constrained implant and rotating-hinge knee prosthesis that was the most recent surgery. All ligament reconstruction procedures failed within one year. The varus-valgus constrained prosthesis provided stability for six years. Conclusions Ligament reconstruction alone cannot provide enough stability for the treatment of chronic lateral instability in patients with obesity problems and LCL deficiency. When the reconstruction fails a salvage procedure with rotating-hinge knee is still available. Introduction Instability is one cause for aseptic failure following total knee arthroplasty TKA . Varus-valgus instability can result from ligament imbalance component malalignment component loosening bone loss bone fracture polyethylene wear or collateral ligament failure. Medial valgus instability is much more common than lateral varus instability and several repair techniques and treatment options are described in the literature 1-3 . To the best of our knowledge however no .
