Evidence map›Paper›PMID 25947898›Full record

ArticleInternational orthopaedics2016

Accuracy of combined anteversion in image-free navigated total hip arthroplasty: stem-first or cup-first technique?

Shigeo Fukunishi, Shoji Nishio, Yuki Fujihara, Shohei Okahisa, Yu Takeda, Tomokazu Fukui, Shinichi Yoshiya

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in International orthopaedics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing 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

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

  1. Pooled it
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  10. Accuracy of acetabular cup insertion in an anterolateral supine approach using an accelerometer-based portable navigation system.Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs · 2021
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  11. New combined anteversion technique in hybrid THA: cup-first procedure with CT-based navigation.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2020
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  16. Effect of improved navigation performance on the accuracy of implant placement in total hip arthroplasty with a CT-based navigation system.Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs · 2018
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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

7 authors.

Shigeo FukunishiOrthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan. seikei@hyo-med.ac.jp.
Shoji NishioOrthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
Yuki FujiharaOrthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
Shohei OkahisaOrthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
Yu TakedaOrthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
Tomokazu FukuiOrthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
Shinichi YoshiyaOrthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeIn total hip arthroplasty (THA), combined anteversion (CA) is used as a parameter for assessment of overall prosthetic alignment. The purpose of this study was to comparatively examine the CA value in patients who underwent primary THA using the image-free navigation system either with a cup-first or stem-first technique.

methodsEighty-three hips undergoing primary THA using the OrthoPilot® image-free navigation system (B. Braun-Aesculap, Tuttlingen, Germany) were included in this study. The patient population was divided into two groups depending on the procedure used: cup-first technique and stem-first technique. In the cup-first group, inclination and anteversion (AV) angles were targeted at 35-45° and 15-25°, respectively, while stem antetorsion (AT) was determined for each patient based on the amount of individual native femoral AT angle. In the stem-first group, the femur was prepared first with the target angle corresponding to the native femoral AT and the cup AV was decided considering the CA calculated with Widmer's formula (aiming at the optimal Widmer's CA of 37.3°).

resultsBetter consistency in Widmer's CA values was attained in the stem-first group as indicated by the smaller SD values. In the assessment of overall alignment, Widmer's CA values were within the satisfactory range (37 ± 5°) in 41.9 and 92.3 % of the subjects in the cup-first group and the stem-first group, respectively.

conclusionsThe stem-first technique with image-free navigated THA could effectively achieve accurate and consistent control of the CA value and thus is expected to improve the surgical outcome.

Indexed as

AdultAgedArthroplasty, Replacement, HipBone AnteversionFemaleFemurHip JointHip ProsthesisHumansMaleMiddle AgedSurgery, Computer-AssistedTomography, X-Ray ComputedCombined anteversionNavigationStem firstTotal hip arthroplasty

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Registered trials

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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.