The Treatment of Functional Crossbites (Pseudo-Class III) in Adults

Abstract

Long-term loss of occlusal vertical dimension causes parafunction and changes in the nature of the oral cavity during the life of the patient. We often see cases where the mandible drifts forward in a habitual position resembling an Angle class III type of occlusion. If an adequate prosthesis with increased vertical dimension is placed, it will allow the condyles to gradually assume the correct position in the fossa.
There is much controversy about the advantages and disadvantages of increasing occlusal vertical dimension. The important point is to use diagnostic appliances and carefully observe the response and occlusal function for as long as possible during the initial therapy. Much more attention must be paid to clinical re-evaluation prior to placement of the final prosthesis if the teeth are periodontally involved since the goal of occlusal treatment is to achieve a self-stabilizing occlusal relationship.
This article discusses the diagnostic evaluation, treatment planning, and clinical procedures for pseudo-class III type occlusal problems in clinical practice.