Akademik Veri Yönetim Sistemi
JOURNAL OF ARTHROPLASTY, cilt.32, sa.9, 2017 (SCI-Expanded)
Background: Although mechanical alignment is critical for optimal function and long-term implant durability, the role of modular stems in achieving ideal alignment is unclear. Methods: We identified 319 revision total knee arthroplasty from 2003-2013, for which stem length, stem diameter, and stem fixation method were recorded prospectively. Three-dimensional canal-filling ratio, the product of canal-filling ratio at the stem tip in both the anteroposterior and lateral planes, and alignment were measured radiographically. Results: Ideal alignment of the femur was considered to be 95 degrees in the anteroposterior (AP) plane and from 1 degrees of extension to 4 degrees of flexion in the lateral plane, and ideal tibial alignment was considered to be 90 degrees in the AP plane. Even after accounting for difference in stem size and canal-fill, ideal AP alignment was more reliably achieved with press-fit stems. Conclusion: Furthermore, increased engagement of the diaphysis and its anatomical axis with canal-filling stems facilitates accurate alignment. (C) 2017 Elsevier Inc. All rights reserved.