Fig. 4

Photographs show the four test conditions evaluated in the present study. AW4: 4-mm BO and 0% protrusion while awake; SL4: 4-mm BO and 0% protrusion during sleep; SL4A: 4-mm BO and 50% protrusion during sleep; SL12: 12-mm BO and 0% protrusion during sleep