Evidence map›Paper›PMID 26801783›Full record

Trial reportKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2016

Surgical accuracy in high tibial osteotomy: coronal equivalence of computer navigation and gap measurement.

S Schröter, C Ihle, D W Elson, S Döbele, U Stöckle, A Ateschrang

Erratum issuedAbstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 46 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 3 pooled it
7.2field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

46 citing papers in PubMed, 3 syntheses or guidelines pooled it, 92 citations in OpenAlex.

  1. Pooled it
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  3. Outcome reporting following navigated high tibial osteotomy of the knee: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2016
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  7. Mid-term survival and physiological joint angles after double level osteotomy of severe varus osteoarthritis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025
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  18. Muti-factor analysis of sport activity level after high tibial osteotomy.Journal of orthopaedic surgery and research · 2023
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

S SchröterDepartment of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, University of Tübingen, Schnarrenbergstr. 95, Tübingen, Germany.
C IhleDepartment of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, University of Tübingen, Schnarrenbergstr. 95, Tübingen, Germany.
D W ElsonDepartment of Orthopaedics, Queen Elizabeth Hospital, Gateshead, UK. davidelson@yahoo.com.
S DöbeleDepartment of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, University of Tübingen, Schnarrenbergstr. 95, Tübingen, Germany.
U StöckleDepartment of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, University of Tübingen, Schnarrenbergstr. 95, Tübingen, Germany.
A AteschrangDepartment of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, University of Tübingen, Schnarrenbergstr. 95, Tübingen, Germany.
University of Tübingen · DEBG Klinik Tübingen · DEQueen Elizabeth Hospital · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeMedial opening wedge high tibial osteotomy (MOW HTO) is now a successful operation with a range of indications, requiring an individualised approach to the choice of intended correction. This manuscript introduces the concept of surgical accuracy as the absolute deviation of the achieved correction from the intended correction, where small values represent greater accuracy. Surgical accuracy is compared in a randomised controlled trial (RCT) between gap measurement and computer navigation groups.

methodsThis was a prospective RCT conducted over 3 years of 120 consecutive patients with varus malalignment and medial compartment osteoarthritis, who underwent MOW HTO. All procedures were planned with digital software. Patients were randomly assigned into gap measurement or computer navigation groups. Coronal plane alignment was judged using the mechanical tibiofemoral angle (mTFA), before and after surgery. Absolute (positive) values were calculated for surgical accuracy in each individual case.

resultsThere was no significant difference in the mean intended correction between groups. The achieved mTFA revealed a small under-correction in both groups. This was attributed to a failure to account for saw blade thickness (gap measurement) and over-compensation for weight bearing (computer navigation). Surgical accuracy was 1.7° ± 1.2° (gap measurement) compared to 2.1° ± 1.4° (computer navigation) without statistical significance. The difference in tibial slope increases of 2.7° ± 3.9° (gap measurement) and 2.1° ± 3.9° (computer navigation) had statistical significance (P < 0.001) but magnitude (0.6°) without clinical relevance.

conclusionSurgical accuracy as described here is a new way to judge achieved alignment following knee osteotomy for individual cases. This work is clinically relevant because coronal surgical accuracy was not superior in either group. Therefore, the increased expense and surgical time associated with navigated MOW HTO is not supported, because meticulously conducted gap measurement yields equivalent surgical accuracy. LEVEL OF EVIDENCE: I.

Indexed as

AdultFemaleHumansKnee JointMaleMiddle AgedOperative TimeOsteoarthritis, KneeOsteotomyProspective StudiesSurgery, Computer-AssistedTibiaWeight-BearingComputer navigationGap measurementHigh tibial osteotomyKnee osteotomyMedial compartment osteoarthritisSurgical accuracy

Identifiers

PMID26801783
OpenAlexW2309483062

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.