If the jaw relation of an edentulous patient requires an increase in occlusal vertical dimension by 4mm, what is needed?

The correct choice indicates that a new centric relation needs to be recorded. In the context of an edentulous patient, an increase in the occlusal vertical dimension (OVD) means that the distance between the upper and lower jaws when the patient is in occlusion is being increased. When there is a change in this measurement, especially a significant one like 4mm, the relationship between the maxilla and mandible must be reassessed to ensure proper jaw closure and occlusion.

Centric relation is a bone-to-bone relationship that serves as a reference for establishing occlusion. When vertical dimension is altered, the original centric relation might no longer hold true as the new OVD will change how the teeth or, in this case, the dental prosthesis fits together. Therefore, obtaining a new centric relation is crucial to accurately reflect the updated spatial relationship and ensure the patient’s functional and aesthetic needs are met.

Adjustments to the articulator settings or changing condylar guidance may be necessary later on but recording a new centric relation is essential as a first step to establish the new occlusal position. This process will help avoid potential occlusal discrepancies that could lead to discomfort or functional issues for the patient.