Re: Fibre Posts

If the tooth is thick enough that it survives in the ferrule region, it
never needed the post in the first place.

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~+--~+--~+--~+--~+--
Stephen Mancuso, D.D.S.
Troy, Michigan, USA
.....................................................

This posting is intended for informational or conversational purposes only.
Always seek the opinion of a licensed dental professional before acting on
the advice or opinion expressed here. Only a dentist who has examined you
in person can diagnose your problems and make decisions which will affect
your health.
.......................
"NOYB" <noyb@xxxxxxxx> wrote in message
news:gtd5e.1796$go4.337@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> "W_B" <no_one@xxxxxxxxxxx> wrote in message
> news:dtna5119klkeiual4oo10ir1qngrn4j2r2@xxxxxxxxxx
>> On Thu, 7 Apr 2005 11:41:50 -0400, "Joel M. Eichen"
>> <joeleichen@xxxxxxxxx> wrote:
>>
>>>> Cemented gold does not require a 'ferrule'.
>>>
>>>R E P L Y
>>>
>>>We are talking ending on solid tooth structure as opposed to ending on
>>>composite or core buildup. A ferrule is like what holds a decent shovel
>>>handle into the shovel itself.
>>>
>>
>> Shovels always break at the ferrule.
>
> No. They break above or below the ferrule. A ferrule is a metal ring or
> cap that forms encirclement around something (pole, shaft, tooth, etc). If
> you don't create a ferrule effect around a tooth with a post, then the
> post gets all of the lateral stress from occlusion and transmits it down
> the canal space.
>
>
>
>


.

Relevant Pages

  • Re: Fibre Posts
    ... > cutting away all of that extra core material while prepping the crown. ... That's the point of the ferrule. ... >>> the post first contacts the tooth. ... >> If a weaker fulcrum is further out along the lever arm than the stronger ...
    (sci.med.dentistry)
  • Re: JME/DrSteves Ferrule?
    ... >the ferrule, EVERY TIME. ... I spent enough years with a shovel in my hands to ... >know this first hand. ... the tooth become noticeably narrower. ...
    (sci.med.dentistry)
  • Re: Fibre Posts
    ... > But crowns don't snap off the tooth at the height of contour. ... If your crown prep does not extend epically beyond the height of contour, ... >>> The internal stresses are enormous without the ferrule effect. ... >>> in compression. ...
    (sci.med.dentistry)
  • Re: Fibre Posts
    ... >>>composite or core buildup. ... A ferrule is like what holds a decent shovel ... > cap that forms encirclement around something (pole, shaft, tooth, etc). ...
    (sci.med.dentistry)
  • Re: Fibre Posts
    ... > tooth structure and end up with a thin sliver of tooth holding everything ... In the cases where a ferrule leaves a lot of thickness (of ... >dentin walls holding the whole thing together. ... The long prybar is forcing the root apart. ...
    (sci.med.dentistry)