None biomimetics definition in it. Only biomaterials in conection with
medical use.
Mihai
-----Original Message-----
From: Engineers and biologists mechanical design list
[mailto:[log in to unmask]] On Behalf Of J F V Vincent
Sent: 29 decembrie 2003 12:05
To: [log in to unmask]
Subject: Re: Biomaterials, biomimetic materials, biocompatible materials
So would you look up "biomimetics" in it and tell me what it says?
Julian
Quoting Mihai Chirita <[log in to unmask]>:
> Dear David Roylance,
> You can find the accepted definitions for biomaterials in "Definitions
> in Biomaterials", Progress in Biomedical Engineering, 4, Proceedings
of
> a Consensus Conference of the European Society for Biomaterials,
> Chester, England, March 3/5. 1986, edited by D.F.Williams, institute
of
> Medical and Dental Bioengineering, University of Liverpool, Elsevier .
> Regards,
>
> Mihai CHIRITA
> Ph.D. Professor
> Head of Biomaterials Chair
> Medical Bioengineering Faculty
> Medicine and Pharmacy University
> Str.Universitatii 16, Iasi, 6600, ROMANIA.
> Fax.: + 40-232-230614
> Mobile: +40-723-533393
> E.mail: [log in to unmask] [log in to unmask]
>
>
>
> -----Original Message-----
> From: Engineers and biologists mechanical design list
> [mailto:[log in to unmask]] On Behalf Of David Roylance
> Sent: 29 decembrie 2003 00:59
> To: [log in to unmask]
> Subject: Biomaterials, biomimetic materials, biocompatible materials
>
> To the best of my understanding, the correct terminology for materials
> that can
> be inserted into the human body without ill effect is 'biocompatible.'
> The
> materials don't aggravate a response from the immune system, as well
as
> obviously not being poisonous. Good examples would be cobalt chrome
> molybdenum
> alloys, titanium, or alumina ceramics in hip joint prosthetics, for
> example.
>
> I have always thought that 'biomaterials' on the other hand refers to
> the
> materials of which living systems are made, such as wood, bone, nacre
> and
> muscle.
>
> Most of the biocompatible materials used in medical applications are
not
> particularly 'biomimetic' in that they don't mimic the performance of
> natural
> materials or structures. There is no known example of a living
organism
> utilising pure metals for structural stiffness, for example.
>
> It wouldn't surprise me at all to see both fields covered in the same
> journal,
> however. Returning to the hip replacement example, designers need to
> understand
> the performance of cortical and cancellous (spongy) bone (a
biomaterial)
> well
> in order to design replacements of titanium or ceramics (biocompatible
> materials).
>
> Biomimetics in material design has appeared in this example as it has
> become
> clear that the performance of bone in (say) the femur is far superior
to
> the
> best mechanical replacements made of titanium. Living bone lasts
longer
> (essentially forever) under cyclical loading, while good hip
> replacements now
> last 10-15 years before wear and fatigue become problems. Mimicking
the
> performance of bone in other materials is highly desirable for all
kinds
> of
> applications.
>
> There is also a lot of interest currently in creating materials that
> compare
> well with muscle for actuators; we want a biomimetic material to
mimick
> the
> performance of muscle (a biomaterial.) If this were biocompatible,
then
> we
> could consider putting it inside the human body (e.g. as an artifical
> heart.)
>
> My two cents!
>
> David Roylance
>
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