Final answer:
The occlusal plane adjustment for natural teeth OPPOSED by a complete or partial denture should be completed after the teeth have been set on the trial denture, which is a step within the denture fabrication process.
Step-by-step explanation:
The adjustment of the occlusal plane for natural teeth opposed by a complete or partial denture should be completed after the teeth have been set on the trial denture. This step is crucial for ensuring the proper fit and function of the denture, and is part of the fabrication process prior to the final delivery of the prosthetic to the patient. Making adjustments after the teeth are set but before the final processing allows for fine-tuning of the occlusal relationships, which is important for the patient's comfort and the overall success of the denture restoration.
It's important to acknowledge that through a person's lifetime they have two sets of teeth (dentitions): the 20 deciduous (baby) teeth and the 32 permanent teeth which include the eight incisors used for biting and the four cuspids for tearing food.