Evidence map›Paper›PMID 34493056›Full record

ArticleBone & joint open2021

Early migration of a medially stabilized total knee arthroplasty : a radiostereometric analysis study up to two years.

Frank-David Øhrn, Øystein Bjerkestrand Lian, Masako Tsukanaka, Stephan Maximillian Röhrl

3 registry-linked trialsOpen access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Bone & joint open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 7 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 2 pooled it
0.8field-weighted citation impact, top 26% 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.

NCT04017533 nacompletednot on this map

In Vivo Stability of an Uncemented Total Knee Arthroplasty With Medially Stabilized Design

TypeinterventionalSponsorOslo University HospitalRan2021 to 2024Enrolled31ConditionsKnee OsteoarthritisArmsGMK Sphere TKR
NCT06499038 naactive not recruitingnot on this mapstarted 2024, after this paper: background citation

Migration Analysis of a Hybrid Hip Replacement Evaluating Stem and Ancillary Acetabular Screw Fixation-A Randomized Controlled CT-RSA Trial

TypeinterventionalSponsorHelse Møre og Romsdal HFRan2024 to 2028Enrolled60ConditionsHip OsteoarthritisArmsTotal Hip Arthroplasty
NCT06507046 narecruitingnot on this mapstarted 2024, after this paper: background citation

Robotic Assisted Surgery Comparing Personalized Alignment Versus Mechanical Alignment of Total Knee Arthroplasty - A Randomized Controlled Trial

TypeinterventionalSponsorHelse Møre og Romsdal HFRan2024 to 2035Enrolled152ConditionsKnee OsteoarthritisArmsTotal knee replacement
3 · Its place in the literature

Who cites it

7 citing papers in PubMed, 2 syntheses or guidelines pooled it, 8 citations in OpenAlex.

  1. Pooled it
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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

4 authors at 3 institutions in 1 country.

Frank-David ØhrnKristiansund Hospital, Møre and Romsdal Health Trust, Kristiansund, Norway.
Øystein Bjerkestrand LianKristiansund Hospital, Møre and Romsdal Health Trust, Kristiansund, Norway.
Masako TsukanakaInstitute of Clinical Medicine, University of Oslo, Oslo, Norway.ORCID 0000-0001-6753-8591
Stephan Maximillian RöhrlInstitute of Clinical Medicine, University of Oslo, Oslo, Norway.
Norwegian University of Science and Technology · NOOslo University Hospital · NOUniversity of Oslo · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsMedial pivot (MP) total knee arthroplasties (TKAs) were designed to mimic native knee kinematics with their deep medial congruent fitting of the tibia to the femur almost like a ball-on-socket, and a flat lateral part. GMK Sphere is a novel MP implant. Our primary aim was to study the migration pattern of the tibial tray of this TKA.

methodsA total of 31 patients were recruited to this single-group radiostereometric analysis (RSA) study and received a medial pivot GMK Sphere TKA. The distributions of male patients versus female patients and right versus left knees were 21:10 and 17:14, respectively. Mean BMI was 29 kg/m

resultsMTPMs at three, 12, and 24 months were 1.0 mm (95% CI 0.8 to 1.2), 1.3 mm (95% CI 0.9 to 1.7), and 1.4 mm (0.8 to 2.0), respectively. The Forgotten Joint Score was 79 (95% CI 39 to 95) and Knee Injury and Osteoarthritis Outcome Score obtained at two years was 94 (95% CI 81 to 100), 86 (95% CI 75 to 93), 94 (95% CI 88 to 100), 69 (95% CI 48 to 88), and 81 (95% CI59 to 100) for Pain, Symptoms, Activities of Daily Living, Sport & Recreation, and Quality of Life, respectively.

conclusionIn conclusion, we found that the mean increase in MTPM was lower than 0.2 mm between 12 and 24 months and thus apparently stable. Yet the GMK Sphere had higher migration at one and two years than anticipated. Based on current RSA data, we therefore cannot conclude on the long-term performance of the implant, pending further assessment. Cite this article:

Indexed as

BMIContemporary knee arthroplastiesContemporary knee designsForgotten Joint ScoreGMK SphereKnee arthroplastyKnee injury and Osteoarthritis Outcome Score (KOOS)kneesMedially stabilizedMedial pivotPatient-reported outcome measuresradiostereometric analysis (RSA)RSAtibial bonetibial trayTKAtotal knee arthroplasties (TKAs)varus

Identifiers

PMID34493056
PMCPMC8479839
OpenAlexW3198558731

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

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.