Evidence map›Paper›PMID 33884442›Full record

Trial reportKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2022

Treatment of post-meniscectomy knee symptoms with medial meniscus replacement results in greater pain reduction and functional improvement than non-surgical care.

Kenneth R Zaslav, Jack Farr, Richard Alfred, R Maxwell Alley, Michael Dyle, Andreas H Gomoll, Christian Lattermann, Brian P McKeon, Christopher C Kaeding, Thomas Giel and 1 more

Open access · hybridAbstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
3.3field-weighted citation impact, top 7% 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

16 citing papers in PubMed, 24 citations in OpenAlex.

  1. Trial
  2. Review
  3. Surgical treatments of bone marrow lesions.Journal of experimental orthopaedics · 2026
    Review
  4. Article
  5. Article
  6. Review
  7. Review
  8. Collagen-Based Scaffolds for Meniscal Repair and Regeneration.Journal of tissue engineering and regenerative medicine · 2025
    Review
  9. The Current State of Meniscus Replacements.Current reviews in musculoskeletal medicine · 2024
    Review
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. 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

11 authors at 10 institutions in 1 country.

Kenneth R ZaslavOrtho Virginia, Virginia Commonwealth University, 7858 Shrader Road, Richmond, VA, 23294, USA. Kzaslav@gmail.com.ORCID http://orcid.org/0000-0002-9709-6461
Jack FarrOrthoIndy, Greenwood, IN, USA.
Richard AlfredThe Bone and Joint Center, Albany, NY, USA.
R Maxwell AlleyThe Bone and Joint Center, Albany, NY, USA.
Michael DyleTelos Partners, LLC, Denver, CO, USA.
Andreas H GomollHospital for Special Surgery, New York, NY, USA.
Christian LattermannBrigham and Women's Faulkner Hospital Orthopaedic Center, Boston, MA, USA.
Brian P McKeonBoston Sports and Shoulder Center, Waltham, MA, USA.
Christopher C KaedingThe Ohio State University Wexner Medical Center Sports Medicine, Columbus, OH, USA.
Thomas GielOrthoSouth, Memphis, TN, USA.
Elliott B HershmanNorthwell Health Physician Partners, Orthopaedic Institute at Lenox Hill, New York, NY, USA.
United States Bone and Joint Initiative · USBoston Sports & Shoulder Center · USBrigham and Women's Faulkner Hospital · USHealthPartners · USHospital for Special Surgery · USIndiana Orthopaedic Hospital · USNorthwell Health · USTennessee Orthopaedic Clinics · USThe Ohio State University Wexner Medical Center · USVirginia Commonwealth University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePartial meniscectomy is a common orthopedic procedure intended to improve knee pain and function in patients with irreparable meniscal tears. However, 6-25% of partial meniscectomy patients experience persistent knee pain after surgery. In this randomized controlled trial (RCT) involving subjects with knee pain following partial meniscectomy, it was hypothesized that treatment with a synthetic medial meniscus replacement (MMR) implant provides significantly greater improvements in knee pain and function compared to non-surgical care alone.

methodsIn this prospective, multicenter RCT, subjects with persistent knee pain following one or more previous partial meniscectomies were randomized to receive either MMR or non-surgical care. This analysis evaluated the 1-year outcomes of this 2-year clinical trial. Patient-reported knee pain, function, and quality of life were measured using nine separate patient-reported outcomes. The primary outcomes were the pain subscale of the Knee injury and Osteoarthritis Outcome Score (KOOS) and the average of all five KOOS subscales (KOOS Overall). Treatment cessation was defined as permanent device removal in the MMR group and any surgical procedure to the index knee in the non-surgical care group.

resultsTreated subjects had a median age of 52 years old (range 30-69 years) and one or more previous partial meniscectomies at a median of 34 months (range 5-430 months) before trial entry. Among 127 subjects treated with either MMR (n = 61) or non-surgical care (n = 66), 11 withdrew from the trial or were lost to follow-up (MMR, n = 0; non-surgical care, n = 11). The magnitude of improvement from baseline to 1 year was significantly greater in subjects who received MMR in both primary outcomes of KOOS Pain (P = 0.013) and KOOS Overall (P = 0.027). Treatment cessation was reported in 14.5% of non-surgical care subjects and only 4.9% of MMR subjects (n.s.).

conclusionTreatment with the synthetic MMR implant resulted in significantly greater improvements in knee pain, function, and quality of life at 1 year of follow-up compared to treatment with non-surgical care alone. LEVEL OF EVIDENCE: I.

Indexed as

Knee InjuriesTibial Meniscus InjuriesAdultAgedArthroscopyHumansMeniscectomyMenisci, TibialMiddle AgedPainImplantKOOSMedial meniscusMeniscus lesionMeniscus tearNon-surgical careNUsurfacePartial meniscectomyRCTReplacement

Identifiers

PMID33884442
PMCPMC9007779
OpenAlexW3154335179

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.