TFO_10112021 Flashcards
Clayton 1986 (CR vs. CO)
A normal centric relation to centric occlusion shift has been established at 1.25mm
Occlusion shift consequences
shift from a position in which the jaw is relaxed into which all teeth touch. This shift may induce wear and wear may induce interferences in excursive movements of the envelope of function as we go throughout life. Sometimes we can adapt as in reports of Frank Celenza with the neuromuscular control we have through the proprioceptive reflex arc in our teeth (Celenza, 1973) and sometimes we cannot, inducing muscle dysfunction and pain.
Gnathology (1970’s)
Condyle seated in– most posterior, then superior-posterior, then at a later time to be seated in the most anterior-superior position.
Used anterior guidance related to the steepness of the eminence along with posterior disclussion (when the jaw moved anteriorly, the posterior teeth separate and are guided by the anterior teeth)
Bioesthetics (~1980’s)
Similarity to Gnathology
Used seated condyles to determine occlusion
Basis for anterior guidance and posterior disclusion
Difference to Gnathology
Rigid in regard to measurements of the size of anterior teeth and depth of overbite, overjet, etc.
Pankey-Dawson
Similarity to Gnathology
Used condylar position (in anterior superior position)
Anterior guidance and posterior disclussion
Difference to Gnathology
Add in that patients need custom anterior guidance (not everyone needs a deep overbite)
Neuromuscular control
Uses a TENS device that electrically pulls the muscles. Not concerned about overbite, overjet, etc. because thought was if patient presents with “quiet” muscles” then people will not grind teeth.
Conformative
This technique is most used/popular by dentists. Use the current occlusion. (Ex: ask patient to bite, make sure crown being placed does not hit too heavy)
(Spear 2021)
At one point in time, the four main philosophies thought that if could modify occlusion correctly, patients would stop grinding teeth.
