Determining optimal medial-lateral resection angle for varus patients undergoing a total knee arthroplasty

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Publication Type thesis
School or College College of Engineering
Department Bioengineering
Author Aanstoos, Megan Elizabeth
Title Determining optimal medial-lateral resection angle for varus patients undergoing a total knee arthroplasty
Date 2008-08
Description Soft tissue and ligament imbalancing has been documented as a contributor to excessive wear in total knee arthroplasty (TKA). Conventional surgical techniques realign the varus proximal tibia to a neutral angle with the anatomical axis of the tibia during TKA. This modification can require additional operative procedures, including rebalancing of the ligaments and intraoperative alignment. David Scott, our collaborative surgeon, stated that he has "little to no need" to re-balance the ligaments when resecting a varus patient to 2° of varus during a primary TKA. Although an apparent clinical advantage, little was known as to how this resection technique might affect the properties of the cancellous bone, which are important since failure of bone can lead to instability and failure of the implant fixation. A collaborative study was conducted with Institutional Review Board (IRB) approval. The general hypothesis tested that resecting the proximal tibia of a varus patient at a 2° varus angle would not affect bone strength or trabecular orientation compared to a neutral resection angle. The study tested the compressive strength of cancellous bone as well as examined trabecular orientation/degree of anisotropy of the cancellous bone to determine if there were differences. Mechanical testing used a penetration method to measure compressive strength. Bone specimens were cut from the proximal tibia of the patient and sent from WA to UT
Type Text
Publisher University of Utah
Subject Total knee replacement, Complications; Ligaments, Mechanical properties.
Dissertation Institution University of Utah
Dissertation Name MS
Language eng
Relation is Version of Digital reproduction of "Determining optimal medial-lateral resection angle for varus patients undergoing a total knee arthroplasty" J. Willard Marriott Library Special Collections, RD14.5 2008 .A25
Rights Management © Megan Elizabeth Aanstoos
Format Medium application/pdf
Format Extent 10,645,621 bytes
Identifier us-etd2,33481
Source Original: University of Utah J. Willard Marriott Library Special Collections
Conversion Specifications Original scanned on Epson GT-30000 as 400 dpi to pdf using ABBYY FineReader 9.0 Professional Edition.
ARK ark:/87278/s66w9rq8
Setname ir_etd
Date Created 2012-04-23
Date Modified 2017-05-04
ID 193575
Reference URL https://collections.lib.utah.edu/ark:/87278/s66w9rq8