Evidence map›Paper›PMID 27492384›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2017

The accuracy of bony resection from patient-specific guides during total knee arthroplasty.

Yadin D Levy, Vincent V G An, Christopher J W Shean, Floris R Groen, Peter M Walker, Warwick J M Bruce

Abstract readEvaluation Study
PubMed Publisher
In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.3field-weighted citation impact, top 19% 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

10 citing papers in PubMed, 17 citations in OpenAlex.

  1. Trial
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  3. No improvement in reducing outliers in coronal axis alignment with patient-specific instrumentation.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018
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  10. Clinical Outcome of Total Knee Arthroplasty Performed Using Patient-Specific Cutting Guides.Medical science monitor : international medical journal of experimental and clinical research · 2017
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Yadin D LevySydney Olympic Park Hip and Knee Clinic, Shop 4/8 Australia Ave, Sydney Olympic Park, NSW, 2127, Australia.
Vincent V G AnSydney Olympic Park Hip and Knee Clinic, Shop 4/8 Australia Ave, Sydney Olympic Park, NSW, 2127, Australia. vian2424@uni.sydney.edu.au.ORCID http://orcid.org/0000-0002-9187-1252
Christopher J W SheanFaculty of Medicine, University of Sydney, Sydney, Australia.
Floris R GroenSydney Olympic Park Hip and Knee Clinic, Shop 4/8 Australia Ave, Sydney Olympic Park, NSW, 2127, Australia.
Peter M WalkerSydney Olympic Park Hip and Knee Clinic, Shop 4/8 Australia Ave, Sydney Olympic Park, NSW, 2127, Australia.
Warwick J M BruceSydney Olympic Park Hip and Knee Clinic, Shop 4/8 Australia Ave, Sydney Olympic Park, NSW, 2127, Australia.
Olympic Park Sports Medicine Centre · AUThe University of Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeIn patient-specifically instrumented (PSI) total knee arthroplasty, the correlation between the pre-operative surgical plan, accuracy of the cutting block, and intra-operative resection size is unclear. The aim of this study was to evaluate the ability to accurately execute the PSI surgical plan and to add to the merging information with respect to this technology with the hypothesis that the PSI blocks would demonstrate good accuracy with regard to the bony thickness of the resections.

methodsOne hundred and thirty TKAs using PSI (MRI/long-leg radiographs) were retrospectively analysed. All surgeries were conducted via similar surgical approach and technique, with resection performed after guide placement and alignment assessment. The bony cut thicknesses of the medial (MTP) and lateral tibial plateau (LTP), distal medial (DM), distal lateral (DL), posterior medial (PM) and posterior lateral (PL) femur were measured with a vernier calliper. The measured resection thickness was subtracted from the planned resection. Errors were defined as ≤1.5 mm (acceptable), 1.5-2.5 mm (borderline), and >2.5 mm (outliers).

resultsOverall, 81 (62.3 %) of the knees were free of outliers. The distal femur cut had the highest proportion of acceptable cut error with 209 of 260 total cuts acceptable (80.4 %). The tibial cuts had the lowest proportion of "acceptable" cuts (68.9 %). Tibial cuts had more outliers (33 of 260 cuts, 12.7 %) than the femur (39 of 520 cuts, 7.5 %) (p = 0.01). Pre-operative varus (n = 97) and valgus (n = 33) deformities demonstrated 7.7 % (45/482) and 13.6 % (27/198) of cuts which were outliers, respectively (p = 0.01).

conclusionPSI showed only fair to moderate accuracy with 62.3 % of the knees presenting no outliers. The tibia cutting guide was less accurate than the femur. Specific attention is needed when cutting the tibia and in correction of valgus deformity. Moreover, intra-operative verifying measurements can provide feedback to the accuracy of the surgical plan. LEVEL OF EVIDENCE: IV, case series with no comparison group.

Indexed as

Arthroplasty, Replacement, KneeFemurHumansImaging, Three-DimensionalKnee JointPreoperative CareSurgery, Computer-AssistedTibiaTomography, X-Ray ComputedArthroplastyKneePatient-specific instrumentation

Identifiers

PMID27492384
OpenAlexW2482610282

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.