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Computer-assisted high tibial osteotomy: preliminary results.
MedLine Citation:
PMID:  20954637     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Open-wedge high tibial osteotomy (HTO) is an established technique for the treatment of symptomatic varus malaligned knees. In this study, we prospectively followed up 13 patients (14 knees) who underwent navigation system-supported HTO for varus knee deformity. Preoperatively all patients underwent a physical examination, and anteroposterior and laterolateral lower limb weight-bearing digital radiographs were obtained. The following parameters were examined: (1) Insall-Salvati index; (2) posterior tibial slope angle; (3) mechanical femorotibial angle; (4) inferior limb length. At a mean follow-up of 12.6 months, clinical examination showed satisfactory results in all patients. The mean Modified Cincinnati Rating System Questionnaire rating increased significantly from 46.5 ± 7.2 to 84.6 ± 8, while the mean Knee Society Score increased significantly from 51.4 ± 9.9 to 85.1 ± 7.3. The mean Insall-Salvati index changed from 1.11 preoperatively to 1.10 postoperatively (P=.742). According to the navigation system data, the femorotibial mechanical axis was corrected from a varus of 6.3° ± 1.9° to a valgus of 2.1° ± 1.6°. These data matched postoperative radiographic lower limb weight-bearing data. In the group of patients in whom we evaluated the posterior tibial slope with the navigation system, we detected an increase of 0.3° ± 0.4° compared with the preoperative radiographic examination evaluations; the comparison between the postoperative and the preoperative radiograhic examination results showed an increase of 0.5° ± 0.7° (P=.87). The results of our study seem to show greater accuracy of mechanical axis correction and smaller increase in tibial slope when a navigation system is used in open-wedge HTO.
Authors:
Raffaele Iorio; Antonio Vadalà; Silvio Giannetti; Marco Pagnottelli; Priscilla Di Sette; Fabio Conteduca; Andrea Ferretti
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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:  82-6     Citation Subset:  IM    
Copyright Information:
Copyright 2010, SLACK Incorporated.
Affiliation:
Orthopaedic Unit and "Kirk Kilgour" Sports Injury Centre, S. Andrea Hospital, University of Rome, Sapienza, Italy.
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