Evidence map›Paper›PMID 39113616›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2024

Different intraoperative joint laxity patterns do not impact clinical outcomes in robotic-assisted medial unicompartmental knee replacement with 1-to-1 surface reconstruction.

Matteo Innocenti, Filippo Leggieri, Carlo Theus-Steinman, Joaquin Moya-Angeler, Bernhard Christen, Tilman Calliess

Erratum issuedAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2024. 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 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
–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

7 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Matteo InnocentiDepartment of Clinical Orthopedics, A.O.U. Careggi CTO, University of Florence, Florence, Italy.ORCID http://orcid.org/0000-0001-9604-2042
Filippo LeggieriDepartment of Clinical Orthopedics, A.O.U. Careggi CTO, University of Florence, Florence, Italy.ORCID http://orcid.org/0009-0007-1289-8849
Carlo Theus-SteinmanArticon Spezialpraxis für Gelenkchirurgie, Bern, Switzerland.
Joaquin Moya-AngelerDepartment of Orthopaedic Surgery, Hospital General Universitario Reina Sofia, Murcia, Spain.ORCID http://orcid.org/0000-0002-3520-2521
Bernhard ChristenArticon Spezialpraxis für Gelenkchirurgie, Bern, Switzerland.ORCID http://orcid.org/0009-0003-5893-819X
Tilman CalliessArticon Spezialpraxis für Gelenkchirurgie, Bern, Switzerland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeRobotic-assisted technology in medial unicompartmental knee arthroplasty (mUKA) allows for customized adjustments of joint laxity through virtual preoperative component positioning before bone preparation. Nevertheless, the optimal balancing curve has yet to be delineated. This study sought to investigate if varying intraoperative knee laxity patterns had any impact on postoperative patient outcomes. MATERIALS AND

methodsA retrospective analysis was conducted on prospectively collected data from 326 fixed-bearing RAUKA procedures performed between 2018 and 2022 with a minimum 2-year follow-up. Patients were categorized into three cohorts based on intraoperative joint laxity patterns (millimetres of joint gap during valgus stress) imparted at 20°, 60°, 90° and 120° of knee flexion: cohort 1 < +0.5 mm (tight); cohort 2 between 0.6 and 1.9 mm (physiologic); cohort 3 > 2 mm (loose). Wilcoxon and Kruskal-Wallis tests were conducted to assess patient-reported outcome measure (PROM) improvements and preoperative and postoperative differences across the cohorts. A Spearman's test evaluated the correlation between knee balance at all degrees of flexion and preoperative and postoperative HKA.

resultsNo differences in preoperative and postoperative PROMs were identified across the cohorts (p > 0.05). All three cohorts with different joint laxity patterns showed a significant improvement in the postoperative PROMS (p < 0.05). The preoperative or postoperative limb alignment did not significantly affect clinical outcomes relative to different laxity patterns.

conclusionNo differences were found in the outcomes across different joint laxity patterns in robotic-assisted medial UKA using fixed-bearing mUKAs. There was no evident advantage for maintaining a closer to physiologic laxity compared to tighter or looser balancing. LEVEL OF EVIDENCE: Level III, therapeutic study.

Indexed as

Arthroplasty, Replacement, KneeJoint InstabilityRobotic Surgical ProceduresAgedFemaleHumansKnee JointMaleMiddle AgedOsteoarthritis, KneePatient Reported Outcome MeasuresRange of Motion, ArticularRetrospective StudiesTreatment Outcomegap balanceHKA correlationknee balancemedial unicompartmental arthroplastysoft tissue laxity

Identifiers

PMID39113616
PMCPMC11605022

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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.