Evidence map›Paper›PMID 33812467›Full record

ArticleSICOT-J2021

Personalized alignment in total knee arthroplasty: current concepts.

Sébastien Lustig, Elliot Sappey-Marinier, Camdon Fary, Elvire Servien, Sébastien Parratte, Cécile Batailler

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in SICOT-J, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06507046 (Robotic Assisted Surgery Comparing Personalized Alignment Versus Mechanical Alignment of Total Knee Arthroplasty - A Randomized Controlled Trial), which is not on this map. Cited by 118 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
118citing papers in PubMed, 2 pooled it
22.6field-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.

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

118 citing papers in PubMed, 2 syntheses or guidelines pooled it, 190 citations in OpenAlex.

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58 more citing papers are in PubMed but not listed here.

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 4 institutions in 4 countries.

Sébastien LustigOrthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 69004 Lyon, France - Univ Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622 Lyon, France.
Elliot Sappey-MarinierOrthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 69004 Lyon, France.
Camdon FaryDepartment of Orthopaedic Surgery, Western Health, 3002 Melbourne, Australia - Australian Institute for Musculoskeletal Science (AIMSS), The University of Melbourne and Western Health, 3002 St. Albans, VIC, Australia.
Elvire ServienOrthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 69004 Lyon, France - LIBM - EA 7424, Interuniversity Laboratory of Biology of Mobility, Claude Bernard Lyon 1 University, 69003 Lyon, France.
Sébastien ParratteInternational Knee and Joint Centre, 46705 Abu Dhabi, United Arab Emirates - Institute for Locomotion, Aix-Marseille University, 13009 Marseille, France.
Cécile BataillerOrthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 69004 Lyon, France - Univ Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622 Lyon, France.ORCID 0000-0003-3990-0906
Université Claude Bernard Lyon 1 · FRAix-Marseille Université · FRHôpital de la Croix-Rousse · FRThe University of Melbourne · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Traditionally in total knee arthroplasty (TKA), a post-operative neutral alignment was the gold standard. This principle has been contested as functional outcomes were found to be inconsistent. Analysis of limb alignment in the non-osteoarthritic population reveals variations from neutral alignment and consideration of a personalized or patient-specific alignment in TKA is challenging previous concepts. The aim of this review was to clarify the variations of current personalized alignments and to report their results. Current personalized approaches of alignment reported are: kinematic, inverse kinematic, restricted kinematic, and functional. The principle of "kinematic alignment" is knee resurfacing with restitution of pre-arthritic anatomy. The aim is to resurface the femur maintaining the native femoral joint line obliquity. The flexion and extension gaps are balanced with the tibial resection. The principle of the "inverse kinematic alignment" is to resurface the tibia with similar medial and lateral bone resections in order to keep the native tibial joint line obliquity. Gap balancing is performed by adjusting the femoral resections. To avoid reproducing extreme anatomical alignments there is "restricted kinematic alignment" which is a compromise between mechanical alignment and true kinematic alignment with a defined safe zone of alignment. Finally, there is the concept of "functional alignment" which is an evolution of kinematic alignment as enabling technology has progressed. This is obtained by manipulating alignment, bone resections, soft tissue releases, and/or implant positioning with a robotic-assisted system to optimize TKA function for a patient's specific alignment, bone morphology, and soft tissue envelope. The aim of personalizing alignment is to restore native knee kinematics and improve functional outcomes after TKA. A long-term follow-up remains crucial to assess both outcomes and implant survivorship of these current concepts.

Indexed as

Functional alignmentImplant survivorshipKinematic alignmentPersonalized alignmentRestricted alignmentTotal knee arthroplasty

Identifiers

PMID33812467
PMCPMC8019550
OpenAlexW3149016674

What OpenQuestion holds

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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.