Evidence map›Paper›PMID 34633223›Full record

ArticleBone & joint open2021

The impact of functional combined anteversion on hip range of motion: a new optimal zone to reduce risk of impingement in total hip arthroplasty.

Patrick B O'Connor, Matthew T Thompson, Christina I Esposito, Nikola Poli, James McGree, Thomas Donnelly, William Donnelly

Open access · goldAbstract read
In one paragraph

Article in Bone & joint open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.8field-weighted citation impact, top 4% 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

23 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Observational
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Pelvic Tilt Increases the Risk of Impingement and Alters Impingement Type in Total Hip Arthroplasty: A Patient-Specific Simulation Study.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2025
    Article
  12. Review
  13. Article
  14. Article
  15. Hip-spine relationship: clinical evidence and biomechanical issues.Archives of orthopaedic and trauma surgery · 2024
    Review
  16. Article
  17. Review
  18. Article
  19. Article
  20. Creating Consensus in the Definition of Spinopelvic Mobility.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2023
    Review
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 at 4 institutions in 3 countries.

Patrick B O'ConnorSt Vincent's Private Hospital Northside, Brisbane, Queensland, Australia.ORCID 0000-0003-0872-0312
Matthew T ThompsonStryker, Mahwah, New Jersey, USA.
Christina I EspositoStryker, Mahwah, New Jersey, USA.
Nikola PoliQueensland University of Technology, Brisbane, Queensland, Australia.
James McGreeQueensland University of Technology, Brisbane, Queensland, Australia.
Thomas DonnellySt Vincent's Private Hospital Northside, Brisbane, Queensland, Australia.
William DonnellySt Vincent's Private Hospital Northside, Brisbane, Queensland, Australia.
St Vincent’s Private Hospital Brisbane · AUQueensland University of Technology · AUNational Society of Professional Engineers · USOffice of the Chief Scientist · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsPelvic tilt (PT) can significantly change the functional orientation of the acetabular component and may differ markedly between patients undergoing total hip arthroplasty (THA). Patients with stiff spines who have little change in PT are considered at high risk for instability following THA. Femoral component position also contributes to the limits of impingement-free range of motion (ROM), but has been less studied. Little is known about the impact of combined anteversion on risk of impingement with changing pelvic position.

methodsWe used a virtual hip ROM (vROM) tool to investigate whether there is an ideal functional combined anteversion for reduced risk of hip impingement. We collected PT information from functional lateral radiographs (standing and sitting) and a supine CT scan, which was then input into the vROM tool. We developed a novel vROM scoring system, considering both seated flexion and standing extension manoeuvres, to quantify whether hips had limited ROM and then correlated the vROM score to component position.

resultsThe vast majority of THA planned with standing combined anteversion between 30° to 50° and sitting combined anteversion between 45° to 65° had a vROM score > 99%, while the majority of vROM scores less than 99% were outside of this zone. The range of PT in supine, standing, and sitting positions varied widely between patients. Patients who had little change in PT from standing to sitting positions had decreased hip vROM.

conclusionIt has been shown previously that an individual's unique spinopelvic alignment influences functional cup anteversion. But functional combined anteversion, which also considers stem position, should be used to identify an ideal THA position for impingement-free ROM. We found a functional combined anteversion zone for THA that may be used moving forward to place total hip components. Cite this article:

Indexed as

acetabular componentcombined anteversionCT scansfemoraFemoral componentflexionhip impingementhipsimplant positionlateral radiographspelvisrange of motionsafe zoneTotal hip arthroplastytotal hip arthroplasty (THA)

Identifiers

PMID34633223
PMCPMC8558443
OpenAlexW3206897660

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.