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Stand up! Are normal weight-bearing forces sufficient for a 12/14 Morse taper locking in total hip arthroplasty?
- Source :
- HIP International. 32:231-236
- Publication Year :
- 2020
- Publisher :
- SAGE Publications, 2020.
-
Abstract
- Background: The aim of this study was to investigate total hip arthroplasty (THA) Morse taper pull-off strengths after impaction prior to cyclical loading compared to cyclical loading alone. The practical relevance of the experiment is to provide a perspective on what may be clinically satisfactory taper assembly given the spectrum of head tapping patterns used by surgeons, as well as compare traditional impaction performed in standard THA with alternate methods of taper engagement such as ‘ in situ assembly’ used in micro-invasive techniques. Methods: 36 taper constructs utilising a combination of cobalt-chrome alloy and ceramic-titanium alloy junctions were investigated in vitro in wet and dry conditions with cyclical loading of the constructs. Taper disengagement strengths with and without impaction were compared. Secondary investigation of the surface roughness of the heads and tapers was also assessed. Results: An impaction to a wet taper resulted in a greater pull off force compared to a dry taper with a CoCr head and taper combination. Impacting the head and dryness of the taper did not affect pull off forces of a ceramic femoral head on titanium taper. Pulling a head off a taper significantly alters the head surface roughness. Conclusion: Impaction of a taper does not provide any benefit over cyclical loading of a taper assembly alone for pull-off strength.
- Subjects :
- Arthroplasty, Replacement, Hip
Fretting
Prosthesis Design
law.invention
Weight-Bearing
03 medical and health sciences
0302 clinical medicine
law
Humans
Medicine
Orthopedics and Sports Medicine
Morse taper
Orthodontics
030222 orthopedics
Bearing (mechanical)
Impaction
business.industry
Pull off force
030229 sport sciences
Prosthesis Failure
Corrosion
Normal weight
Surgery
Chromium Alloys
Hip Prosthesis
business
Total hip arthroplasty
Subjects
Details
- ISSN :
- 17246067 and 11207000
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- HIP International
- Accession number :
- edsair.doi.dedup.....541c8c3932e06591302639fef84136a0