Evidence map›Paper›PMID 29593913›Full record

ArticleAdvances in orthopedics2018

The Impact of Pinless Navigation in Conventionally Aligned Total Knee Arthroplasty.

P Koenen, M M Schneider, T R Pfeiffer, B Bouillon, H Bäthis

Abstract read
In one paragraph

Article in Advances in orthopedics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
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

3 citing papers in PubMed.

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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

5 authors.

P KoenenDepartment of Orthopaedics, Trauma Surgery and Sports Medicine, Cologne-Merheim Medical Center, University of Witten/Herdecke, Cologne, Germany.ORCID 0000-0001-8346-3462
M M SchneiderDepartment of Orthopaedics, Trauma Surgery and Sports Medicine, Cologne-Merheim Medical Center, University of Witten/Herdecke, Cologne, Germany.
T R PfeifferDepartment of Orthopaedics, Trauma Surgery and Sports Medicine, Cologne-Merheim Medical Center, University of Witten/Herdecke, Cologne, Germany.
B BouillonDepartment of Orthopaedics, Trauma Surgery and Sports Medicine, Cologne-Merheim Medical Center, University of Witten/Herdecke, Cologne, Germany.
H BäthisDepartment of Orthopaedics, Trauma Surgery and Sports Medicine, Cologne-Merheim Medical Center, University of Witten/Herdecke, Cologne, Germany.ORCID 0000-0002-1137-9138

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRestoration of the mechanical axis is a main objective in total knee replacement (TKR). Aim of this study was to analyse the verification tool of a pinless navigation system in conventional TKR (cTKR).

methodsIn a prospective study, 147 TKR were performed by conventional technique. Using the "pinless verification" mode of a smartphone based navigation system, the cutting block position and final resection plane for distal femur and proximal tibial resection were measured. If necessary, the block position or resection level were optimized, corrections were protocolled. Postoperatively, standardized radiographs were performed.

resultsIn 65.3%, intraoperative measurements changed the surgical procedure (corrections: 20.4% femoral, 25.9% tibial, 19% both). The additional time for surgery compared to cTKR averaged 6 minutes (79 ± 15 versus 73 ± 17 minutes). Using navigation data, the final femoral and tibial axes were in 93% within a range of ±2°. A mean difference of 1.4° and 1.6° could be shown between the final measurement of the navigation system and the postoperative mLDFA and mMPTA.

conclusionIntraoperative pinless navigation has impact on the surgical procedure in the majority of cTKR. It represents a less time-consuming tool to improve implant position while maintaining the routine of conventional technique.

Identifiers

PMID29593913
PMCPMC5822932

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