Evidence map›Paper›PMID 33879331›Full record

ArticleThe Journal of arthroplasty2021

Acquired Idiopathic Stiffness After Contemporary Total Knee Arthroplasty: Incidence, Risk Factors, and Results Over 25 Years.

Aaron R Owen, Meagan E Tibbo, Andre J van Wijnen, Mark W Pagnano, Daniel J Berry, Matthew P Abdel

Open access · greenAbstract read
In one paragraph

Article in The Journal of arthroplasty, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
4.2field-weighted citation impact, top 5% 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

20 citing papers in PubMed, 43 citations in OpenAlex.

  1. Trial
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  5. New Clues to the Challenge of Knee Arthrofibrosis: From Molecules to Therapies.The Journal of the American Academy of Orthopaedic Surgeons · 2026
    Review
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  9. Article
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  12. Efficacy of ADIPOR1 and ADIPOR2 peptide-agonist AdipoRon in preventing contracture in a rabbit model of arthrofibrosis.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2024
    Article
  13. Article
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  15. Global mapping of institutional and hospital-based (Level II-IV) arthroplasty registries: a scoping review.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2024
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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 1 institution in 1 country.

Aaron R OwenDepartment of Orthopedic Surgery, Mayo Clinic, Rochester, MN.
Meagan E TibboDepartment of Orthopedic Surgery, Mayo Clinic, Rochester, MN.
Andre J van WijnenDepartment of Orthopedic Surgery, Mayo Clinic, Rochester, MN; Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN.
Mark W PagnanoDepartment of Orthopedic Surgery, Mayo Clinic, Rochester, MN.
Daniel J BerryDepartment of Orthopedic Surgery, Mayo Clinic, Rochester, MN.
Matthew P AbdelDepartment of Orthopedic Surgery, Mayo Clinic, Rochester, MN.
Mayo Clinic in Arizona · US

Funding

Pathologic Role of Inflammation and Mechanistic Analysis of Myofibroblastogenesis in ArthrofibrosisR01AR072597 · NIAMS · MAYO CLINIC ROCHESTER · PI ABDEL, MATTHEW P · 2018 to 2022
$1.7M
NIAMS NIH HHS R01 AR072597
6 · The paper itself

Abstract

backgroundAcquired idiopathic stiffness (AIS) remains a common failure mode of contemporary total knee arthroplasties (TKAs). The present study investigated the incidence of AIS and manipulation under anesthesia (MUA) at a single institution over time, determined outcomes of MUAs, and identified risk factors associated with AIS and MUA.

methodsWe identified 9771 patients (12,735 knees) who underwent primary TKAs with cemented, modular metal-backed, posterior-stabilized implants from 2000 to 2016 using our institutional total joint registry. Mean age was 68 years, 57% were female, and mean body mass index was 33 kg/m

resultsDuring the study period, 456 knees (3.6%) developed AIS and 336 knees (2.6%) underwent MUA. Range of motion (ROM) increased a mean of 34° after the MUA; however, ROM for patients treated with MUA was inferior to patients without AIS at final follow-up (102° vs 116°, P < .0001). Significant risk factors included younger age (HR 2.3, P < .001), increased tourniquet time (HR 1.01, P < .001), general anesthesia (HR 1.3, P = .007), and diabetes (HR 1.5, P = .001).

conclusionAcquired idiopathic stiffness has continued to have an important adverse impact on the outcomes of a subset of patients undergoing primary TKAs. When utilized, MUA improved mean ROM by 34°, but patients treated with MUA still had decreased ROM compared to patients without AIS. Importantly, we identified several significant risk factors associated with AIS and subsequent MUA. LEVEL OF EVIDENCE: Level III, retrospective comparative study.

Indexed as

Arthroplasty, Replacement, KneeAgedAnesthesia, GeneralFemaleHumansIncidenceKnee JointRange of Motion, ArticularRetrospective StudiesRisk FactorsTreatment Outcomearthrofibrosiscontracturemanipulation under anesthesia (MUA)range of motion (ROM)stiffness

Identifiers

PMID33879331
PMCPMC8292170
OpenAlexW3147967822

What OpenQuestion holds

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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.