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Home > Archive > Dentistry > May 2006 > Can someone explain this to me?
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Can someone explain this to me?
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| Steve_R 2006-05-02, 1:08 am |
| I have implants placed at teeth location 19, 21, 23 ,26, 28 and 30.
I've had impressions made. The lab says they will use two hader bars.
One will connect implants 19, 21 and 23. The other will connect
implants
26, 28 and 30. The two bars will meet between teeth 23 and 26 but will
not be connected. I can't picture what they are trying to do. Perhaps
I
misunderstand. I thought that a bar went between each two abuttments
so that to connect three implants would take two bars.
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Steve_R wrote:
> I have implants placed at teeth location 19, 21, 23 ,26, 28 and 30.
> I've had impressions made. The lab says they will use two hader bars.
> One will connect implants 19, 21 and 23. The other will connect
> implants
> 26, 28 and 30. The two bars will meet between teeth 23 and 26 but will
> not be connected. I can't picture what they are trying to do. Perhaps
> I
> misunderstand. I thought that a bar went between each two abuttments
> so that to connect three implants would take two bars.
Perhaps the lab wants to design in this manner because they think the
axis of rotation may compromise the anterior implants or unseat the
RPD. A hader bar joining #23 and #26 may actually act as a hinge when
the distal extentions are loaded. Three retainers bilaterally may be
the way to go offering more surface area for retention. Sounds like a
realy cool case. Alex Hayden Lake Crown and Bridgeworks
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| Steve_R 2006-05-03, 1:08 am |
| Thanks for your response. I sort of understand what you're saying.
There could be a segment between each of the implants and the
unit would be a bar. Thus, since the left and right are not connected
there would be tow bars. The dental assistant said the reason they
were
doing two bars has something to do with flexion. I guess the disconnect
between the left and right sides allows for independent movement of the
two sides. The purpose of using 6 implants was to provide maximum
stability
but it seems that if the left and right bars are moving independently,
then
stability would decrease.
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| Steve_R 2006-05-03, 1:08 am |
| Thanks for your response. I sort of understand what you're saying.
With a segment between each of the implants the unit would be a bar.
Thus, since the left and right are not connected, there would be two
bars.
The dental assistant said the reason they were doing two bars has
something
to do with flexion. I guess the disconnect between the left and right
sides allows for independent movement of the two sides. The purpose of
using 6 implants was to provide maximum stability but it seems that
with the overdenture attached,if the left and right bars are moving
independently, then stability of the overdenture would decrease.
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