What is the primary purpose of establishing the vertical dimension of occlusion (VDO) during the immediate try-in?

The primary purpose of establishing the vertical dimension of occlusion (VDO) during the immediate try-in is to maintain proper function and aesthetics. VDO refers to the distance between two arches at the occlusal plane when the jaw is in a comfortable, relaxed position. Properly setting the VDO is crucial as it impacts the overall function of the occlusal surfaces, the health of the temporomandibular joints, and the facial aesthetics.

Maintaining an appropriate VDO ensures that the teeth come together properly for effective chewing and speaking. If the VDO is too high or too low, it can create discomfort during function, lead to muscle strain, and may affect how the patient perceives their facial profile and smile. Thus, achieving an accurate VDO is essential to ensure both functional efficacy and aesthetic appeal in the final restoration. This understanding helps in the overall rehabilitation process, allowing the dental professional to make the necessary adjustments during the try-in phase to achieve a successful outcome.