Quantitative fabrication assessments. Four aspects of fabrication will be evaluated by investigators: (1) stability—does the device move independently of the maxilla and is the mandible stabilized by the device, (2) retention—does the device resist displacement, (3) tissue adaptation—how much spacing exists between the maxilla and the device and between the device and mandible, and (4) health of the teeth, gingival, tongue, palate and lips.