Evidence map›Paper›PMID 33514399›Full record

ArticleJournal of orthopaedic surgery and research2021

Minimally invasive surgery total knee arthroplasty is less popular, but the prosthesis designed specifically for MIS provides good survival and PROMs with a minimum follow-up of 10 years.

Shinya Toyoda, Takao Kaneko, Yuta Mochizuki, Masaru Hada, Kazutaka Takada, Hiroyasu Ikegami, Yoshiro Musha

Abstract read
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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 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

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

  1. Pooled it
  2. Trial
  3. Article
  4. Review
  5. 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

7 authors.

Shinya ToyodaDepartment of Orthopedic Surgery, Toho University School of Medicine, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
Takao KanekoDepartment of Orthopedic Surgery, Toho University School of Medicine, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan. takao-knee@oha.toho-u.ac.jp.
Yuta MochizukiDepartment of Orthopedic Surgery, Toho University School of Medicine, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
Masaru HadaDepartment of Orthopedic Surgery, Toho University School of Medicine, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
Kazutaka TakadaDepartment of Orthopedic Surgery, Toho University School of Medicine, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
Hiroyasu IkegamiDepartment of Orthopedic Surgery, Toho University School of Medicine, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
Yoshiro MushaDepartment of Orthopedic Surgery, Toho University School of Medicine, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe concept of minimally invasive surgery (MIS) was introduced in total knee arthroplasty (TKA) in the late 1990s. The number of MIS TKAs has clearly decreased in recent years. An implant designed specifically for MIS TKA has been used all over the world, but there are no reports of long-term postoperative results. The purpose of this study was to characterize long-term clinical results with a minimum follow-up of 10 years.

methodsThis retrospective study included 109 consecutive patients with 143 NexGen CR-Flex prostheses, which are MIS tibial component prostheses designed specifically for MIS TKA. Twelve-year survival analysis was performed using Kaplan-Meier method. Revision surgery for any reason was the endpoint. Long-term clinical and radiographic results of 74 knees (55%) in 60 patients with more than 10 years of follow-up were analyzed.

resultsThe cumulative survival rate of the single-radius posterior-stabilized TKA of 74 knees was 94.7% (95% confidence interval, 90-99%) at 12 years after surgery. Seven knees (9%) required additional surgery during the 10-year follow-up because of periprosthetic infections. Mean postoperative Knee Society knee score and functional score were 91 and 74 points, respectively. There were no cases of prosthesis breakage, polyethylene wear, or aseptic loosening of the prosthesis.

conclusionThe prosthesis designed specifically for MIS TKA is associated with good survival and clinical results with a minimum follow-up of 10 years, even though MIS TKA has become less popular. LEVEL OF EVIDENCE: III.

Indexed as

Knee ProsthesisProsthesis DesignProsthesis FailureAgedArthroplasty, Replacement, KneeFemaleFollow-Up StudiesHumansMaleMiddle AgedMinimally Invasive Surgical ProceduresOsteoarthritis, KneeRetrospective StudiesTime FactorsTreatment OutcomeMinimally invasive surgeryMinimum follow-up of 10 yearsSurvivalTotal knee arthroplasty

Identifiers

PMID33514399
PMCPMC7844949

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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.