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#Post#: 2457--------------------------------------------------
Active plate vs modified stretching plate?
By: Brosem1987 Date: July 28, 2017, 7:19 pm
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Is the modified stretching plate t he same as the active plate
but with just a few more screw if you need them?
Or is the functionality different?
I'm under the impression it's the same with more function, but
maybe if you don't need need the extra screws you can just use
the middle standard screw and use it just like the active plate?
I figure it's better to pay a little more money and have more
function if you need it as opposed to need more and having to
buy another device.
Does this sound right? I might not use the "extra" screws, but
if I need them I might.
Thanks
#Post#: 2460--------------------------------------------------
Re: Active plate vs modified stretching plate?
By: dadfa Date: July 28, 2017, 10:24 pm
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I have been looking for the same answers for a long time. I
have asked various dentists online, and have emailed bracesshop
and have not received any replies.
From the looks of it appears you have to adjust all screws
simultaneously.
This plate looks even better, because it appears it might cause
forward growth.
I would to hear if anyone has more details of this plate or
experience.
#Post#: 2461--------------------------------------------------
Re: Active plate vs modified stretching plate?
By: TheGreatWork Date: July 28, 2017, 10:28 pm
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Pay closer attention to how the screws interact, they are not
the same device. The force vectors are applied in different
directions depending on the order in which the screws are
turned.
And it depends on the palate. Some may need even expansion
across the whole palate, while others may only require force at
the front or back of the palate.
So, for example, if the front of the palate/teeth are properly
round and the palate caves inwards towards the rear teeth, then
the modified expansion device would be unsuitable: It can not be
used to expand at the rear without also expanding the front. The
acrylic behind the canine teeth moves out just as far as the
acrylic behind the molars.
Where as with, say, the Y plate one can expand the rear without
moving the front, or also expand anterior forward while leaving
the posterior as it is.
Use your tongue and how it fits in your mouth to see exactly
where you need to put force.
#Post#: 2481--------------------------------------------------
Re: Active plate vs modified stretching plate?
By: Progress Date: July 31, 2017, 5:40 am
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[quote author=anarqwin link=topic=311.msg2479#msg2479
date=1501485323]
I'm also wondering if it's worth buying the one with 5 screws
even though I would probably not use all of them. I just need a
bit more of expansion in one side where there is some crowding,
but maybe the middle expansion would fix it after all. Also, now
the website is back selling it for 229,99 and it was 169,99
euros (60 euros more!). I wish there was competition or someone
selling something similar to the expanders we hear it's better
like the homeoblock, biobloc and so on... But I'm actually not
sure if they are really better because sometimes I think that
taking tongue space actually would allow for an even greater
force from the tongue in the palate (if you are intentionally
pressing) to expand upward than it would be able to do if the
tongue was in a larger space and fully stretched. Someone please
explain if I'm wrong but I think this is logical: if your tongue
muscle is compressed in a small space, you can apply more force
than if it's fully stretched, right? Just be sure to keep
pressing the palate also when you take off the device and I
guess it's all fine.
[/quote]
It's probably true to certain extent, but in the end the amount
of force tongue can apply in any position is not a lot compared
to the static pressure from a palate expander.
As for the additional screws, I have my own doubts about their
usefulness for expansion. There's only one suture the palate can
grow from, which is the mid-palatal suture. Anything that pushes
and keeps the two halves of the palate apart from each other
should do the trick. Additional screws won't provide additional
benefit for expansion, but they may be helpful in guiding
crowded teeth to a more optimal alignment during the expansion
process.
#Post#: 2485--------------------------------------------------
Re: Active plate vs modified stretching plate?
By: Progress Date: July 31, 2017, 9:08 am
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I doubt it's possible to expand selectively like that. The
suture is either wide enough to trigger new bone growth or it's
not. The surrounding structure doesn't allow the palatal bones
to tilt in a way that would enable one area of the suture to
expand while leaving the rest intact. In this way the suture
works like two pieces of wood glued and clamped together. You
can break them apart by cracking the glue, but you can only do
it fully, not partially because wood doesn't bend like that.
[quote]if the suture separating two bony elements is less than
250μm in width approximately, bone will be resorbed until
the sutural width is restored. Similarly, if the sutural width
is greater than about 250μm, bone will be deposited until
the sutural width is maintained. The actual sutural width varies
and is about 100-400μm 29, 30 at any one time. Note also
that separation of cranial sutures by an expanding brain volume
is associated with bone deposition. Thus, the notion of stretch
or tension is implied in osteogenesis. It is interesting to note
that the periodontal space on a periapical radiograph of a
healthy tooth is usually around 0.25mm in width. As well,
historically-speaking, in palatal expansion appliances the
midline screw is turned by about 0.25mm[/quote]
HTML https://daks2k3a4ib2z.cloudfront.net/59419022ff1d4150cb0158a6/5947f6517d99a57e46b28e61_24.pdf
#Post#: 2486--------------------------------------------------
Re: Active plate vs modified stretching plate?
By: Cat Date: July 31, 2017, 9:28 am
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The prices are too much high, there must be something going on.
We should stop buying the appliances to force them to cut on the
prices.
#Post#: 2497--------------------------------------------------
Re: Active plate vs modified stretching plate?
By: Progress Date: August 1, 2017, 4:03 am
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Yes, I get it. I doubt it's possible. But that's just my guess.
If you ask me, there is no reason not to aim for your genetic
potential in terms of overall palatal width. Aesthetics should
not have priority over health and function.
#Post#: 2526--------------------------------------------------
Re: Active plate vs modified stretching plate?
By: dadfa Date: August 6, 2017, 9:51 pm
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Which type of expander would you guys recommend for someone who
had wisdom teeth extractions with a recessed face, and a lack of
lip support when smiling? Would the modified expander give
forward growth?
I would like forward growth and a wider smile.
I went to a dentist asking him if HE would use expanders on me,
he refused, but was happy to take the $50 consultation fee. So
much for getting professional help.
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