Evidence map›Paper›PMID 32448945›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2021

Better accuracy and reproducibility of a new robotically-assisted system for total knee arthroplasty compared to conventional instrumentation: a cadaveric study.

Ari Seidenstein, Miles Birmingham, Jared Foran, Steven Ogden

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 pooled it
11.2field-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, 1 synthesis or guideline pooled it, 103 citations in OpenAlex.

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  15. External femoral rotation of 2 degrees is associated with the lowest stuffing rates around the femur in functionally aligned TKA.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025
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  20. Image-based robotic (ROSAJournal of orthopaedic surgery and research · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 4 institutions in 2 countries.

Ari SeidensteinRothman Orthopaedics, 50 Craig Road, Montvale, NJ, 07645, USA. Ari.Seidenstein@rothmanortho.com.
Miles BirminghamChippenham Hospital, Richmond, VA, 23225, USA.
Jared ForanPanorama Orthopedics and Spine Center, Golden, CO, 80401, USA.
Steven OgdenTexas Health Clearfork, Forth Worth, TX, 76109, USA.
Holy Name Medical Center · USPanorama Research (United States) · USRichmond Hospital · CATexas Health Harris Methodist Hospital Fort Worth · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeRobotically-assisted total knee arthroplasty (TKA) has been shown to improve alignment and decrease outliers, an important goal in TKA procedures. The purpose of this cadaveric study was to compare the accuracy and reproducibility of a recently introduced TKA robotic system to conventional instrumentation for bone resections.

methodsThis cadaveric study compared 14 robotically-assisted TKA with 20 conventional TKAs. Four board-certified high volume arthroplasty surgeons with no prior experience in robotics (except one) performed the procedures with three different implant systems. Angle and level of bone resections obtained from optical navigation or calliper measurements were compared to the intra-operative plan to determine accuracy. Group comparison was performed using Student t test (mean) and F test (variance), with significance at p < 0.05.

resultsThe robotic group demonstrated statistically more accurate results (p < 0.05) and fewer outliers (p < 0.05) than conventional instrumentation when aiming for neutral alignment. Final limb alignment (HKA) had an accuracy of 0.8° ± 0.6° vs 2.0° ± 1.6°, with 100% vs 75% of cases within 3° and 93% vs 60% within 2°. For the robotically-assisted knees, the accuracy of bone resection angles was below 0.6° with standard deviations below 0.4°, except for the femur flexion (1.3° ± 1.0°), and below 0.7 mm with standard deviations below 0.7 mm for bone resection levels.

conclusionThis in vitro study has demonstrated that this novel TKA robotic system produces more accurate and more reproducible bone resections than conventional instrumentation. It supports the clinical use of this new robotic system. LEVEL OF EVIDENCE: Cadaveric study, Level V.

Indexed as

AgedAged, 80 and overArthroplasty, Replacement, KneeCadaverFemaleFemurHumansKnee JointKnee ProsthesisMaleMiddle AgedReproducibility of ResultsRobotic Surgical ProceduresAccuracyBone resectionCadaveric studyConventional instrumentationRobotic surgeryTotal knee arthroplasty

Identifiers

PMID32448945
OpenAlexW3026172708

What OpenQuestion holds

Textmetadata
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.