A new navigation-based technique for lateral distalizing condylar osteotomy in patients undergoing total knee arthroplasty with fixed valgus deformity.
OBJECTIVE
In a prospective, consecutive study, a navigation-based technique for calculating the sliding distance of the lateral epicondyle prior to osteotomy in TKA surgery of fixed valgus deformity has been developed, and early results have been evaluated.


METHODS
Twenty-seven knees with a fixed valgus deformity undergoing TKA received this new treatment. Clinical scores and radiograph evaluation were performed preoperatively and 1-year postoperatively. Static and dynamic kinematic data were obtained from navigation at the beginning and at the end of surgery.


RESULTS
The calculated amount of sliding distance varied between 5 and 16 mm. No complications regarding this technique occurred. All clinical scores showed a significant improvement, and radiological evaluation showed a correction of all parameters in 100 % of patients.


CONCLUSIONS
With this navigation-based technique, it is possible to calculate the amount of sliding distance prior to osteotomy and obtain excellent early results. All axes have been corrected completely, and flexion and extension gaps were balanced. No specific complications of this technique have occurred so far.


METHODS
II.
Department of Arthroplasty, Hospital for Orthopedic and Trauma Surgery, Lindenlohe 18, 92421, Schwandorf, Germany.
Marco
M
Strauch
Rüdiger
R
von Eisenhart Rothe
Heiko
H
Graichen
D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D060751:Bone Retroversion / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods*; D011446:Prospective Studies; D011859:Radiography; D016059:Range of Motion, Articular; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome