PDA

View Full Version : Fwd: responses on how important is the displacement?



horng99
10-13-1999, 12:19 PM
--- Arnel Aguinaldo wrote:
> Date: Wed, 13 Oct 1999 13:17:03 -0700
> To: Boon Kam
> From: Arnel Aguinaldo
> Subject: Re: how important is the displacement?
>
> Dear Kim:
>
> I believe displacement is important in mechanical
> testing of various
> in-bone screws, but it really depends on what your
> test objectives are. For
> example, I've done tests with ACL surgeons who
> simply wish to find out if
> the screws and/or the tendon grafts pull-out at
> certain peak levels (& at
> what levels), regardless of displacement
> measurement. They simply want to
> know if the screw would hold in place at peak levels
> above physiological
> and biomechanical norms. In ACL reconstruction, such
> data is invaluable in
> determining which screws, grafts (i.e., patellar,
> ST), or combination
> thereof is optimal for compatible patients.
>
> I hope this helps and good luck!
>
> Arnel
>
> =======================================
> Arnel Aguinaldo, M.A.
> Biomechanical Engineer
>
> San Diego State University
> University of California, San Diego
> San Diego, CA
> http://sd.znet.com/~ala/resume.htm
> =======================================
>
> At 09:06 PM 10/12/99 -0700, you wrote:
> >Dear biomch friends,
> >
> >When a pullout test is carried out, how important
> is
> >the displacement? For example, if a 12mm screw was
> >inserted, a highest peak of 300N at a displacement
> of
> >3mm. The peak falls tremendously to zero and below
> >zero, after it hits the 300N before it even reaches
> >the displacement of 6mm.
> >
> >Can anyone explain , please?
> >
> >Your kindness reply is very much appreciated.
> >
> >Thank you very much.
> >
> >Sincerely,
> >Kim
>


=====

__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com

---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
---------------------------------------------------------------