Evidence map›Paper›PMID 36398352›Full record

ArticleANZ journal of surgery2022

Robotic-arm assisted total knee arthroplasty has a learning curve of 16 cases and increased operative time of 12 min.

Mei Lin Tay, Matthew Carter, Nina Zeng, Matthew L Walker, Simon W Young

Open access · hybridAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in ANZ journal of surgery, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 4 pooled it
7.0field-weighted citation impact, top 2% 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

26 citing papers in PubMed, 4 syntheses or guidelines pooled it, 36 citations in OpenAlex.

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  6. Robotics and Computer Navigation Do Not Offer Notable Benefits Compared with Manual Techniques for Total Knee Arthroplasty.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2026
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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

5 authors at 3 institutions in 1 country.

Mei Lin TayDepartment of Surgery, Faculty of Medical and Health Sciences (FMHS), University of Auckland, Auckland, New Zealand.ORCID 0000-0002-1704-120X
Matthew CarterStryker New Zealand, Auckland, New Zealand.
Nina ZengDepartment of Orthopaedic Surgery, North Shore Hospital, Waitematā DHB, Auckland, New Zealand.
Matthew L WalkerDepartment of Orthopaedic Surgery, North Shore Hospital, Waitematā DHB, Auckland, New Zealand.
Simon W YoungDepartment of Surgery, Faculty of Medical and Health Sciences (FMHS), University of Auckland, Auckland, New Zealand.ORCID 0000-0002-0286-8052
North Shore Hospital · NZUniversity of Auckland · NZEducation New Zealand · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRobotic-arm assisted systems are increasingly used for knee arthroplasty, however introduction of new systems can involve a learning curve. We aimed to define the learning curve in terms of operative time and component placement/sizing of a robotic system for total knee arthroplasty (TKA) in a team of experienced surgeons, and to investigate mid-term patient outcomes.

methodsA total of 101 consecutive patients underwent primary robotic-arm assisted TKA by three surgeons (mean 2 year follow-up). Operative times, component placement, implant sizing and reoperations were recorded. Cumulative Summation (CUSUM) was used to analyse learning curves. Patient outcomes were compared between learning and proficiency phases.

resultsThe learning curve was 16 cases, with a 12-min increase in operative time (P < 0.01). Once proficiency was achieved, the greatest time reductions were seen for navigation registration (P = 0.003) and bone preparation (P < 0.0001). A learning curve was found with polyethylene (PE) insert sizing (P = 0.01). No differences were found between learning and proficiency groups in terms of implant survival (100% and 97%, respectively, NS) or patient-reported outcome measures at 2 years (NS).

conclusionIntroduction of a robotic-arm assisted system for TKA led to increased operative times for navigation registration and bone preparation, and a learning curve with PE insert sizing. No difference in patient outcomes between learning and proficiency groups at 2 years was found. These findings can inform surgeons' expectations when starting to use robotic-assisted systems.

Indexed as

Arthroplasty, Replacement, KneeRobotic Surgical ProceduresSurgeonsHumansLearning CurveOperative Timeknee replacementlearning curveoperative timerobottotal knee arthroplasty

Identifiers

PMID36398352
PMCPMC9804534
OpenAlexW4297272140

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.