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The design and production of Co–Cr alloy implants with controlled surface topography by CAD–CAM method and their effects on osseointegration

Paper ID Volume ID Publish Year Pages File Format Full-Text
12553 799 2005 8 PDF Available
Title
The design and production of Co–Cr alloy implants with controlled surface topography by CAD–CAM method and their effects on osseointegration
Abstract

Improved fixation and increased longevity are still important performance criteria in the development of orthopaedic prostheses. The osseointegration of a series of implant designs made of conventional cobalt–chromium alloy was investigated, the shape of each implant being the critical variable. The shape was defined by computer-aided design with a view to maximising interdigitation of new bone with the implant. Two different process routes, conventional casting and selective laser sintering were employed, each process yielded implants that had identical surface topology but different microstructures. Hydroxyapatite (HA) was used to coat some samples by plasma spraying. Bone formation associated with each implant design was delineated through the administration of fluorescent vital dyes at three time points following their implantation into New Zealand white rabbits. After one month, specimens were harvested, resin embedded, serial sectioned and examined under fluorescent light microscopy. The amount of bone growth was quantified using image analysis. Plasma spray HA-coated samples promoted better osteogenesis and integration than uncoated samples. The extent of bone growth associated with identically shaped specimens fabricated by the SLS route was markedly greater, attributed to the microstructure of these implants.

Keywords
Athroplasty; Osteoconduction; Cobalt alloy; Laser manufacturing; Hydroxyapatite coating; Rapid prototyping; Surface topography
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The design and production of Co–Cr alloy implants with controlled surface topography by CAD–CAM method and their effects on osseointegration
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 26, Issue 29, October 2005, Pages 5890–5897
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us