Evidence map›Paper›PMID 34592109›Full record

ArticleBone & joint research2021

Robotic-arm assisted THA can achieve precise cup positioning in developmental dysplasia of the hip : a case control study.

Shinya Hayashi, Shingo Hashimoto, Yuichi Kuroda, Naoki Nakano, Tomoyuki Matsumoto, Kazunari Ishida, Nao Shibanuma, Ryosuke Kuroda

Abstract read
In one paragraph

Article in Bone & joint research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

22 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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  6. [Domestic ROPA surgical robot for total hip arthroplasty: An artificial bone experiments].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2026
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  8. [Short-term effectiveness of visual treatment solution-assisted treatment for Crowe typeZhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 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

8 authors.

Shinya HayashiDepartment of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.ORCID 0000-0003-4308-9845
Shingo HashimotoDepartment of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Yuichi KurodaDepartment of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Naoki NakanoDepartment of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Tomoyuki MatsumotoDepartment of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Kazunari IshidaKobe Kaisei Hospital, Kobe, Japan.
Nao ShibanumaKobe Kaisei Hospital, Kobe, Japan.
Ryosuke KurodaDepartment of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsThis study aimed to evaluate the accuracy of implant placement with robotic-arm assisted total hip arthroplasty (THA) in patients with developmental dysplasia of the hip (DDH).

methodsThe study analyzed a consecutive series of 69 patients who underwent robotic-arm assisted THA between September 2018 and December 2019. Of these, 30 patients had DDH and were classified according to the Crowe type. Acetabular component alignment and 3D positions were measured using pre- and postoperative CT data. The absolute differences of cup alignment and 3D position were compared between DDH and non-DDH patients. Moreover, these differences were analyzed in relation to the severity of DDH. The discrepancy of leg length and combined offset compared with contralateral hip were measured.

resultsThe mean values of absolute differences (postoperative CT-preoperative plan) were 1.7° (standard deviation (SD) 2.0) (inclination) and 2.5° (SD 2.1°) (anteversion) in DDH patients, and no significant differences were found between non-DDH and DDH patients. The mean absolute differences for 3D cup position were 1.1 mm (SD 1.0) (coronal plane) and 1.2 mm (SD 2.1) (axial plane) in DDH patients, and no significant differences were found between two groups. No significant difference was found either in cup alignment between postoperative CT and navigation record after cup screws or in the severity of DDH. Excellent restoration of leg length and combined offset were achieved in both groups.

conclusionWe demonstrated that robotic-assisted THA may achieve precise cup positioning in DDH patients, and may be useful in those with severe DDH. Cite this article:

Indexed as

3D alignmentAcetabular componentacetabulumDevelopmental dysplasia of the hipdevelopmental dysplasia of the hip (DDH)Hipleg lengthMann-Whitney U testRobotic ArmRobotic-arm assisted THAstandard deviationstotal hip arthroplasty (THA)University of California, Los Angeles (UCLA) activity score

Identifiers

PMID34592109
PMCPMC8559969

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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.