Document Detail


Novel approach to reducing discrepancies in radiographic and navigational limb alignments in computer-assisted TKA.
MedLine Citation:
PMID:  20954633     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
This study was conducted (1) to document discrepancies between preoperative and postoperative radiographic measurements and postregistration and postimplantation intraoperative navigational measurements of coronal limb alignments, and (2) to identify predictors of discrepancies between radiographic and navigational measures. In addition, we propose the use of a novel radiographic measuring method, and we demonstrate that this method reduces discrepancies. For 107 total knee arthroplasties performed using a navigation system, coronal alignment were assessed using preoperative and postoperative whole limb radiographs using the standard and novel radiographic methods. During surgery, coronal limb alignment was measured using the navigation system postregistration and postprosthesis implantation. Strengths of correlations and discrepancies between radiographic and navigational assessments were compared between the standard and novel methods. Multivariate regression was performed to identify predictors of discrepancies. Differences between radiographic and navigational measurements were observed for both preoperative and postoperative assessments, but discrepancies were greater for preoperative assessments, despite their stronger correlations. Extent of preoperative varus deformity was identified as the strongest predictor of discrepancy in preoperative radiographic and navigational measurements, and varus malalignment was identified as the strongest predictor of discrepancy in postoperative measurements. Strengths of correlations between radiographic and navigational measurements were similar for the standard and novel radiographic methods, but discrepancies between the 2 were significantly smaller for the novel method for both preoperative and postoperative assessments. The authors propose the use of the described novel radiographic method that reduces discrepancies between radiographic and navigational measurements.
Authors:
Byung June Chung; Isaac Dileep; Chong Bum Chang; Yeon Gwi Kang; Yong Bum Park; Tae Kyun Kim
Related Documents :
12867883 - Effects of pge-1 in patients suffering from peripheral arterial occlusive disease.
7226053 - Leg function after radiotherapy for ewing's sarcoma.
17642063 - Which kind of vascular access for hemodialysis in pediatric patients?
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Orthopedics     Volume:  33     ISSN:  1938-2367     ISO Abbreviation:  Orthopedics     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-10-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7806107     Medline TA:  Orthopedics     Country:  United States    
Other Details:
Languages:  eng     Pagination:  62-7     Citation Subset:  IM    
Copyright Information:
Copyright 2010, SLACK Incorporated.
Affiliation:
Joint Reconstruction Center, Seoul National University Bundang Hospital, Seongnam, Korea.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Navigated revision TKR: a comparative study with conventional instruments.
Next Document:  Primary resection of the posterior cruciate ligament does not produce a gap mismatch in the navigate...