Evidence map›Paper›PMID 33980282›Full record

ArticleJournal of orthopaedic surgery and research2021

Patient-specific instrumentation combined with a new tool for gap balancing is useful in total knee replacement: a 3-year follow-up of a retrospective study.

Ting Deng, Tangyou Liu, Qing Lei, Lihong Cai, Song Chen

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of orthopaedic surgery and research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed, 2 pooled it
0.8field-weighted citation impact, top 29% 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

3 citing papers in PubMed, 2 syntheses or guidelines pooled it, 5 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
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 at 1 institution in 1 country.

Ting Deng *Department of Orthopaedics, The Third Hospital of Changsha, Changsha, China.
Tangyou Liu *Department of Orthopaedics, The Third Hospital of Changsha, Changsha, China.
Qing LeiDepartment of Orthopaedics, The Third Hospital of Changsha, Changsha, China. lqing0504@hotmail.com.ORCID http://orcid.org/0000-0002-0344-8754
Lihong CaiDepartment of Radiology, The Third Hospital of Changsha, Changsha, China.
Song ChenDepartment of Orthopaedics, The Third Hospital of Changsha, Changsha, China.
Third Hospital of Changsha · CN

Funding

Science and Technology Innovation Plan Project of Hunan Province, China 2017JJ2284Science and Technology Plan Project of Hunan Province, China 2018SK4014
6 · The paper itself

Abstract

objectiveThe purpose of this study was to determine whether the gap-balancing technique with patient-specific instrumentation (PSI) and a new balancing device in total knee arthroplasty (TKA) can improve knee function to a greater extent than can the measured resection technique. MATERIALS AND

methodsData from 150 patients who underwent TKA from August 2014 to June 2016 were studied retrospectively. The gap-balancing technique assisted by PSI and the new balancing device was used in 80 patients (82 knees), and the measured resection technique was used in 70 patients (70 knees). The surgical, imaging, and knee function data were compared.

resultsThe gap-balancing technique assisted by PSI and the new balancing device was found to be feasible in all operated knees and reliable. In total, 150 patients (152 knees) of ages ranging from 52 to 78 years (mean 67 years) underwent TKA during the study period. The follow-up period ranged from 35 to 52 months (mean 45 months). Only one patient, who was included in the gap-balancing group, underwent a revision surgery at 2 years postoperatively due to infection. There were no differences in the incidence of anterior knee pain between the two groups. The mean flexion angle, KSS scores, and VAS scores did not significantly differ between the measured resection group and gap-balancing group at 12 weeks or 36 weeks postoperatively. The average joint line displacement was 1.3 ± 1.1 mm (range 0-3) proximally in the GB (gap-balancing) group and 1.2 ± 1.4 mm in the MR (measured-resection) group. No outliers >5 mm in either group were recorded. The mean leg axis deviation from the neutral mechanical axis was 1.8°±1.5° varus (range 0°-3°varus) versus the neutral mechanical axis in the GB group and 1.4°±1.2°(range 0°-3°)in the MR group. No outliers with >3° deviation in either group were recorded.

conclusionsThe gap-balancing technique performed with the new balancing device and PSI can yield accurate femoral component alignment as well as outcomes similar to those of measured resection at 3 years. The new balancing device can be taken into consideration by surgeons who prefer performing the gap-balancing technique with PSI.

Indexed as

AgedArthroplasty, Replacement, KneeBiological Variation, IndividualFeasibility StudiesFemaleFollow-Up StudiesHumansKneeMaleMiddle AgedOsteoarthritis, KneeRange of Motion, ArticularRetrospective StudiesTime FactorsTreatment OutcomeBalancer deviceEquipment designFlexion-extension gap surgical techniqueGap balanceImplantation techniqueLigament balanceMeasured resection techniqueTotal knee arthroplasty

Identifiers

PMID33980282
PMCPMC8114523
OpenAlexW3117315255

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.