Re: extraction over root canal??


Oh and you think that the force on the remaining teeth equals
(total number of teeth normally/remaing teeth) according to the table
analogy, which is just a summation in the y direction?. You forgot
about the torques (not to mention muscle reaction). Just summing
forces in the
Y direction, you'll reach any conclusion you want. Lose half your
teeth
and the load doubles? If you have 4 teeth and lose one the force
increases 25%
(like in a kitchen table) Baloney. Did you laugh your way out of
physics?


I didn't think physics was too funny at all. I did get an A in
the 5 hour physics I, but only got a B in the 3 hour physics II
(I missed two weeks of an 8 week summer session for National Guard
Camp on that one and I'm not to whippy on Quantum mechanics).

One thing about practicing dentistry is that you graduate from theories
into the real world of practical application. There you find that
theories and equations are cool, but they don't do much good trying
to save a tooth or dentition. You can't defy the laws of physics,
but you don't have any reason to keep writing them all down.

Certainly there are many complex issues at work regarding forces
placed on teeth. The basics involve the masseter and temporalis
muscles. They provide the main clenching force. They are very
strong muscles and they are capable of destroying 28-32 teeth when
they over work themselves.

These muscles do not apply less force in clenching just because
the patient loses some teeth! There are sensing mechanisms and
feedback to the brain about the loads on teeth which should help
control the overall force of the muscles of mastication. It doesn't
take too long in the dental field to see that many people find
ways to defeat the system.

Fewer teeth mean a greater load placed on the remaining teeth. One
or two teeth in a non-clencher might not be a long term problem.
Three to five teeth with a clencher means it's going to be a serious
issue. Maybe not in a year or two, but certainly in their life time.

Steve Fawks (or just country bumpkin to you)
.

Relevant Pages

  • Re: site for NTI info?
    ... muscle activity is probably normal during certain sleep stages as ... Some people clench extremely hard and lock their teeth together without ... Now add all of the muscles associated with the trigeminal nerve. ... in contact during sleep and greatly reduces the clenching intensity. ...
    (sci.med.dentistry)
  • Re: clenching question
    ... Your teeth should be regarded in similar fashion. ... Placing your tongue against the roof of your mouth will allow for the ... "freeway space" and a resting point for those muscles. ... doing and when resting the jaw in that arrangement. ...
    (sci.med.dentistry)
  • Re: clenching question
    ... from being damaged banging against each other. ... Your teeth should be regarded in similar fashion. ... "freeway space" and a resting point for those muscles. ... I relax my jaw ...
    (sci.med.dentistry)
  • Re: clenching question
    ... from being damaged banging against each other. ... Your teeth should be regarded in similar fashion. ... "freeway space" and a resting point for those muscles. ... doing and when resting the jaw in that arrangement. ...
    (sci.med.dentistry)
  • Re: extraction over root canal??
    ... placed on teeth. ... strong muscles and they are capable of destroying 28-32 teeth when ... it seems to me that the tmj joint ... Also if there was no reaction at the joint, ...
    (sci.med.dentistry)