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Reliability of computer-assisted surgery as an intraoperative ruler in navigated high tibial osteotomy.

Abstract：

BACKGROUND:Computer-assisted surgery (CAS) can act as an intraoperative ruler in high tibial osteotomy (HTO) to visualize continuously the leg during surgery. QUESTIONS:The aim of the study is to evaluate the accuracy of CAS with respect to preoperative planning and postoperative deviation from the planned leg axis in HTO. In addition, the influence of surgeon experience as well as operation time and perioperative complications are analyzed. METHODS:A prospective multicenter study case series with follow-up at 6 weeks was performed in six centers. Medial open-wedge HTO with Tomofix(®) was done using computer assisted navigation technique with the Brainlab VV Osteotomy 1.0 module. RESULTS:Fifty-one patients with medial gonarthritis were treated with navigated HTO. The follow-up rate was 98%. The majority of HTO-CAS patients fell within the tolerated limit of ±3° for leg axis deviation, however, seven patients were reported with deviations outside of this range: three patients had deviations of >3°-4.5° and four patients >4.5°, respectively. Eight intraoperative complications were documented, partially resulting from technical problems associated with the navigation system. During the 6-week follow-up period, three postoperative complications were experienced, all not associated with navigation technology. CONCLUSIONS:In about 85% of cases, a perfect result in terms of deviation of the planned mechanical leg axis could be achieved. Computer assistance in HTO proved to be a helpful tool regarding intraoperative control of leg axis. LEVEL OF EVIDENCE:Level I, High quality prospective study (all patients were enrolled at the same preoperative planning point with ≥80% follow-up of enrolled patients).

journal_name

Arch Orthop Trauma Surg

journal_title

Archives of orthopaedic and trauma surgery

authors

Gebhard F,Krettek C,Hüfner T,Grützner PA,Stöckle U,Imhoff AB,Lorenz S,Ljungqvist J,Keppler P,AO CSEG.

doi

10.1007/s00402-010-1145-9

subject

Has Abstract

pub_date

2011-03-01 00:00:00

pages

297-302

issue

3

eissn

0936-8051

issn

1434-3916

journal_volume

131

pub_type

杂志文章,多中心研究

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