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2 results on '"Iommetti, Pr"'

1. Alumina and Zirconia Ceramic for Orthopaedic and Dental Devices

Author

Rosario Pignatello, Maccauro, Giulio, Iommetti, Pr, Raffaelli, Luca, Manicone, Paolo Francesco, Maccauro, G (ORCID:0000-0002-7359-268X), Raffaelli, L (ORCID:0000-0003-4525-8446), Manicone, PF (ORCID:0000-0003-0283-2903), Rosario Pignatello, Maccauro, Giulio, Iommetti, Pr, Raffaelli, Luca, Manicone, Paolo Francesco, Maccauro, G (ORCID:0000-0002-7359-268X), Raffaelli, L (ORCID:0000-0003-4525-8446), and Manicone, PF (ORCID:0000-0003-0283-2903)

Abstract

Ceramic materials are made of an inorganic non-metallic oxide. Usually ceramics are divided into two groups: silicon ceramics and aluminous ceramics. Ceramics are also divided into crystalline and non-crystalline depending on inner molecular organization. Depending on their in vivo behaviour, ceramics are classified as bioresorbable, bioreactive or bioinert. Alumina and zirconia are bioinert ceramics; their low reactivity togheter with their good mechanical features (low wear and high stability) led to use them in many biomedical restorative devices. Their most popular application is in arthroprosthetic joints where they have proven to be very effective, that make their use suitable especially in younger, more active patients. Also dental use of these materials was proposed to achieve aesthetic and reliability of dental restorations.

Published
2011

2. An overview about biomedical applications of micron and nano size tantalum.

Author

Maccauro G, Iommetti PR, Muratori F, Raffaelli L, Manicone PF, and Fabbriciani C

Subjects
Animals, Dental Implants, Humans, Nanoparticles ultrastructure, Orthopedic Procedures, Patents as Topic, Biomedical Research, Nanoparticles chemistry, Tantalum chemistry
Abstract

Tantalum is obtained from the minerals colombite, tantalite and euxenite. It is greyish silver, heavy and very hard. Tantalum does not react with body fluids and is used to make surgical equipment. Tantalum also does not irritate the body and is used to make surgical sutures as well as implants, such as artificial joints and cranial plates. Bone growth around tantalum covered by calcium phosphate is described by in vitro experimentations. in vivo. Bioactive properties of porous tantalum have been recently developed. Porous tantalum consists of an interconnected porous structure with an average porosity diameter of approximately 400 microm. Hollow spheres with nanometre-to-micrometer dimensions are widely used in different range of applications such as drug delivery carriers and bioreactors. Porous tantalum metal is currently used in orthopaedic for manufacturing of structural component for primary and revision total hip and knee replacements and, more recently, in spine surgery. Good clinical outcomes have been achieved especially in hip revision surgery, using tantalum implants, and promising short term follow up have been reported for knee revision surgery. Some patents for tantalum biomedical applications have been obtained and this article reviews various recent patents on this material. Many patents are developed on tantalum for biomedical application. This paper review some of them with particular interested for biomedical applications in orthopaedic and dentistry.

Published
2009
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