Final answer:
The principles to consider in constructing complete dentures for a patient with a debilitating disease are maximum extension, non-pressure impression technique, and porcelain opposing plastic teeth.
Step-by-step explanation:
When constructing complete dentures for a patient with a debilitating disease, several principles should be considered. One of these principles is maximum extension, which refers to ensuring that the dentures cover as much of the edentulous (toothless) areas as possible.
This helps in providing stability and retention to the dentures. Another principle is a non-pressure impression technique, which involves taking impressions without applying excessive pressure on the tissues. This helps in minimizing discomfort and trauma to the patient. Lastly, porcelain opposing plastic teeth should be used to prevent excessive wear on the opposing teeth and to provide a more natural appearance.