It is known that patients frequently bite differently when
anesthetized, and after being open for an extended period of time during the
preparation procedure. So, Dr. Damon
Adams, visiting lecturer and editor-in-chief of Dentistry Today, promotes a
unique method of ensuring an accurate bite when taking a dual-arch (triple
tray) impression. The first step is to capture a centric occlusion (CO) bite on
the contralateral (non-prep) side prior to administering anesthesia and before
tooth preparation. When taking the final quadrant impression on the prep side,
the clinician will use the contralateral bite to confirm accuracy of closure.
In other words, the clinician can observe the initial CO bite (seated in place
on the contralateral opposing arch) as the patient slowly closes into the
impression tray on the prep side. The contralateral CO bite will serve to
“guide” the patient into a proper centric. Without a verification technique
such as this, slight variations in bite often go unnoticed, creating lengthy
occlusal adjustments with unnecessary stress for the clinician at the delivery
appointment.
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