Is a THA Stem in Varus a Risk Factor of Long-term Mechanical Complication
NCT ID: NCT05443243
Last Updated: 2022-07-05
Study Results
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Basic Information
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COMPLETED
210 participants
OBSERVATIONAL
2022-05-13
2022-05-16
Brief Summary
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Detailed Description
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Introduction: Femoral stem positioning in the frontal plane has always been considered a fundamental criterion for implant survival and for functional and radiographic outcomes in total hip arthroplasty (THA). The impact of implanting cementless femoral stems in varus alignment on long-term mechanical complications remains poorly defined in the literature. The aim of our study is to compare long-term survivorship as well as functional and radiographic outcomes of stems in varus alignment to stems in neutral alignment.
Patients and Methods: This single center, multi-surgeon, retrospective case-control study will compare a group of 105 THA patients with varus stem alignment (VS) to a control group of 105 THA patients with neutral stem alignment (NS), operated in Brest center between January 2007 and December 2012. The primary outcome measure is implant survival. Secondary outcomes include functional outcomes: HHS, PMA, thigh pain, dislocation and hip ROM; and radiographic outcomes: radiolucency, Agora Roentgenography Assessment (ARA) score, osseointegration, heterotopic ossification, subsidence and stress shielding.
Conditions
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Study Design
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CASE_CONTROL
RETROSPECTIVE
Study Groups
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Varus Stems
Patients with a THA Stem implanted in Varus position
Total Hip Arthroplasty
Patient were operated, a Total hip arthroplasty was performed
Neutral stems
Patients with a THA Stem implanted in Neutral position
Total Hip Arthroplasty
Patient were operated, a Total hip arthroplasty was performed
Interventions
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Total Hip Arthroplasty
Patient were operated, a Total hip arthroplasty was performed
Eligibility Criteria
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Inclusion Criteria
* Having X-rays and clinical data in their file
* Within a period of less than 6 months
* No opposition
Exclusion Criteria
* PTH 2nd intention
* Lost to sight
* Patients who died within 6 months
* Refusal to participate
18 Years
ALL
No
Sponsors
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University Hospital, Brest
OTHER
Responsible Party
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Principal Investigators
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Hoel Letissier, MD
Role: PRINCIPAL_INVESTIGATOR
CHU de Brest
Locations
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CHU de Brest
Brest, , France
Countries
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References
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Batailler C, Fary C, Servien E, Lustig S. Influence of femoral broach shape on stem alignment using anterior approach for total hip arthroplasty: A radiologic comparative study of 3 different stems. PLoS One. 2018 Oct 5;13(10):e0204591. doi: 10.1371/journal.pone.0204591. eCollection 2018.
Murphy CG, Bonnin MP, Desbiolles AH, Carrillon Y, Asmall yi, Ukrainiant Si Selmi T. Varus will have varus; a radiological study to assess and predict varus stem placement in uncemented femoral stems. Hip Int. 2016 Nov 10;26(6):554-560. doi: 10.5301/hipint.5000412. Epub 2016 Oct 15.
Fottner A, Woiczinski M, Kistler M, Schroder C, Schmidutz TF, Jansson V, Schmidutz F. Varus malalignment of cementless hip stems provides sufficient primary stability but highly increases distal strain distribution. Clin Biomech (Bristol). 2018 Oct;58:14-20. doi: 10.1016/j.clinbiomech.2018.07.006. Epub 2018 Jul 5.
Other Identifiers
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PTHVarus ( 29BRC22.0081)
Identifier Type: -
Identifier Source: org_study_id
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