Evidence map›Paper›PMID 33099892›Full record

SynthesisOrthopaedic surgery2020

Comparison of Kinematic Alignment and Mechanical Alignment in Total Knee Arthroplasty: A Meta-analysis of Randomized Controlled Clinical Trials.

Zhi-Xiang Gao, Neng-Ji Long, Shao-Yun Zhang, Wei Yu, Yi-Xin Dai, Cong Xiao

Open access · goldAbstract readComparative StudyMeta-AnalysisReview
In one paragraph

Synthesis in Orthopaedic surgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 4 pooled it
8.8field-weighted citation impact, top 1% 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

51 citing papers in PubMed, 4 syntheses or guidelines pooled it, 89 citations in OpenAlex.

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  19. Image-based robotic (ROSAJournal of orthopaedic surgery and research · 2025
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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.

Zhi-Xiang GaoDepartment of Orthopaedics, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, China.
Neng-Ji LongDepartment of Orthopaedics, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, China.
Shao-Yun ZhangDepartment of Orthopaedics, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, China.
Wei YuDepartment of Orthopaedics, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, China.
Yi-Xin DaiDepartment of Orthopaedics, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, China.
Cong XiaoDepartment of Orthopaedics, The Third Hospital of Mianyang, Sichuan Mental Health Center, Mianyang, China.ORCID https://orcid.org/0000-0002-2374-8738
Mianyang Third People's Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The aim of this study was to estimate whether kinematic alignment (KA) improves knee function or clinical outcomes compared with mechanical alignment (MA) in the short term after total knee arthroplasty (TKA). We searched the literature for randomized controlled trials published before January 2020 from PubMed, EMBASE, Google, Web of Science, Cochrane Library, and other databases. The observation markers included "The Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Index," "Knee Society Score (KSS)," "Oxford Knee Score (OKS)," "combined Knee Society Score (KSS)," "Knee injury and Osteoarthritis Outcome Score (KOOS)," "European Quality of Life Measure-5 Domain-5-Level (EQ-5D-5L)," range of motion (ROM), lower limb alignment, ligament release, and complications. A total of 11 randomized controlled trial studies were included in the study. During the follow-up of 6-24 months, the KA-TKA group was superior to the MA-TKA group in terms of WOMAC scores, combined KSS, KSS, knee function scores, and knee range of flexion, but there was no significant difference in EQ-5D-5L, KOOS, KOOS (symptoms, pain, ADL, sports, and quality of life), complications, knee range of extension, hip-knee-ankle (HKA) angle, tibial component slope angle, lateral distal femoral angle (LDFA) or medial proximal tibial angle (MPTA) angle between the MA-TKA group and the MA-TKA group (P > 0.05). Our meta-analysis revealed that the incidence of ligament release in the MA-TKA group was higher than that in the KA-TKA group. This meta-analysis shows that the KA-TKA group had better clinical outcomes and knee range of flexion than the MA-TKA group at short-term follow-up.

Indexed as

Arthroplasty, Replacement, KneeBiomechanical PhenomenaHumansKnee ProsthesisMusculoskeletal Physiological PhenomenaOsteoarthritis, KneeQuality of LifeRandomized Controlled Trials as TopicRange of Motion, ArticularSurveys and QuestionnairesAlignmentKnee jointMeta-analysisTotal knee arthroplasty

Identifiers

PMID33099892
PMCPMC7767667
OpenAlexW3094181655

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.