tailieunhanh - báo cáo hóa học:" Intramedullary versus extramedullary alignment of the tibial component in the Triathlon knee"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Intramedullary versus extramedullary alignment of the tibial component in the Triathlon knee | Cashman et al. Journal of Orthopaedic Surgery and Research 2011 6 44 http content 6 1 44 JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH RESEARCH ARTICLE Open Access Intramedullary versus extramedullary alignment of the tibial component in the Triathlon knee James P Cashman1 Fiona L Carty2 Keith Synnott1 and Paddy J Kenny1 Abstract Background Long term survivorship in total knee arthroplasty is significantly dependant on prosthesis alignment. Our aim was determine which alignment guide was more accurate in positioning of the tibial component in total knee arthroplasty. We also aimed to assess whether there was any difference in short term patient outcome. Method A comparison of intramedullary versus extramedullary alignment jig was performed. Radiological alignment of tibial components and patient outcomes of 103 Triathlon total knee arthroplasties were analysed. Results Use of the intramedullary was found to be significantly more accurate in determining coronal alignment p while use of the extramedullary jig was found to give more accurate results in sagittal alignment p . There was no significant difference in WOMAC or SF-36 at six months. Conclusion Use of an intramedullary jig is preferable for positioning of the tibial component using this knee system. Introduction Long term survivorship in total knee arthroplasty is significantly dependant on prosthesis alignment. Several studies have correlated poor outcome with malalignment of the components 1 . Accuracy of component positioning relies on alignment guides for making precise and accurate bone cuts. Bargren et all reported a 91 failure rate for TKAs with varus tibio-femoral alignment and 11 of valgus alignment 2 . Significant contention still exists as to what the optimal alignment guide for placement of the tibial component is. While most patients are suitable for the use of either alignment system patients with a large soft tissue envelope can preclude the use of an extramedullary