Functional modification of acrylic resin monoplane occlusions.

Patients with acrylic-resin monoplane occlusions were recalled over a 6-month to 6-year period. The intention was to obtain casts of the dentures in order to study the anteroposterior wear pattern for classifiable variations from the original monoplane occlusion. The lateral component of the wear pattern was not examined during this study. The project revealed wear patterns that were classifiable in terms of the recognized prosthetic occlusal plane forms--namely, the Monson curve, a reverse curve, or a persistence of the original monoplane. Right and left aspects of the maxillary occlusal plane were examined as separate entities and lateral asymmetry was evident in most patients. No attempt was made to quantify the extent of wear as in the studies of Harrison.