Document Detail


Open-wedge osteotomy using an internal plate fixator in patients with medial-compartment gonarthritis and varus malalignment: 3-year results with regard to preoperative arthroscopic and radiographic findings.
MedLine Citation:
PMID:  20926232     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
PURPOSE: Our purpose was to evaluate the 3-year clinical results of patients with medial-compartment osteoarthritis of the knee and varus malalignment who underwent open-wedge high tibial osteotomy (HTO) with an internal plate fixator (TomoFix; Synthes, Solothurn, Switzerland). Clinical results are correlated with arthroscopic and radiographic findings at the time of surgery.
METHODS: This study included 69 patients with a minimum follow-up of 36 months who underwent open-wedge HTO for medial-compartment osteoarthritis of the knee. Knee function was assessed before surgery and at 6, 12, 24, and 36 months after HTO by use of subjective International Knee Documentation Committee and Lysholm scores. Arthroscopic findings before HTO and radiographic assessment of the metaphyseal deformity of the proximal tibia (tibial bone varus angle) were correlated with clinical outcome.
RESULTS: A significant continuous increase in International Knee Documentation Committee score from 47.25 ± 18.71 points before surgery to 72.72 ± 17.15 points at 36 months after HTO was found (P < .001). Grade of cartilage damage of the medial compartment and partial-thickness defects of the lateral compartment did not significantly influence clinical outcome (P > .05 at all time points). The tibial bone varus angle was correlated significantly with greater improvement and better clinical outcome after HTO (P < .01). The overall complication rate of 8.6% was mostly related to surgical causes; nevertheless, a high proportion of patients reported discomfort related to the implant at some point during the follow-up period (40.6%).
CONCLUSIONS: Open-wedge osteotomy by use of the TomoFix system leads to reliable 3-year results. Results do not depend on the severity of medial cartilage defects, whereas partial-thickness defects of the lateral compartment seem to be well tolerated. The prognostic relevance of patellofemoral cartilage defects remains unclear. Local irritation of the implant was observed in a significant number of patients.
LEVEL OF EVIDENCE: Level IV, therapeutic case series.
Authors:
Philipp Niemeyer; Hagen Schmal; Oliver Hauschild; Johanna von Heyden; Norbert P Südkamp; Wolfgang Köstler
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association     Volume:  26     ISSN:  1526-3231     ISO Abbreviation:  Arthroscopy     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-11-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8506498     Medline TA:  Arthroscopy     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1607-16     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.
Affiliation:
Department of Orthopedic Surgery and Traumatology, Freiburg University Hospital, Freiburg, Germany.
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