NDLI: Results of hip resurfacing.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Falez, Francesco Favetti, Fabio Casella, Filippo Papalia, Matteo Panegrossi, Gabriele
Description	Country affiliation: Italy Author Affiliation: Falez F ( Ortopedia e Traumatologia, Ospedale Santo Spirito, Rome, Italy. francesco.falez@francescofalez.it)
Abstract	BACKGROUND: The renewed popularity of resurfacing hip arthroplasty in the last 10 years has generated a remarkable quantity of scientific contributions based on mid- and short-term follow-up. More than one paper has reported a consistent early revision rate as a consequence of biological or biomechanical failure. Two major complications are commonly described with resurfacing implants: avascular necrosis and femoral-neck fracture. A close relationship between these two events has been suggested, but not firmly demonstrated, whereas cementing technique seems to be better understood as potential cause of failure. METHODS: We performed an in vitro study in which four different resurfacing implants were evaluated with a simulated femoral head, two types of cement, (low and high viscosity) and two cementing techniques: direct (cement apposition directly on the femoral head) and indirect (cement poured into the femoral component). RESULTS: High-viscosity cement showed homogeneous distribution over the entire femoral head. Low-viscosity cement showed a massive polar concentration with insufficient, if not absent, distribution in the equatorial zone. CONCLUSION: Polar cement concentration could be a risk factor for early implant failure due to two effects on the femoral head: biological (excessive local exothermic reaction could cause osteocyte necrosis) and biomechanical (which could lead to uneven load distribution on the femoral head).
File Format	HTM / HTML
ISSN	03412695
e-ISSN	14325195
DOI	10.1007/s00264-010-1188-0
Journal	International Orthopaedics
Issue Number	2
Volume Number	35
Language	English
Publisher	Springer
Publisher Date	2011-02-01
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Discipline Orthopedics Arthroplasty, Replacement, Hip Hip Prosthesis Prosthesis Failure Cementation Femoral Neck Fractures Etiology In Vitro Techniques Osteoarthritis, Hip Surgery Osteonecrosis Postoperative Complications Reoperation Wounds And Injuries Complications
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Surgery

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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Association of osteonecrosis and failure of hip resurfacing arthroplasty.

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