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. 2020 Oct 15;16(10):1721–1729. doi: 10.5664/jcsm.8666

Figure 3. UA volume measurement graphic.

Figure 3

P1 = intercuspal position without the use of any oral device; P2 = mandibular advancement device position in closed mouth; P3 = mandibular advancement device position with increased bite-raise; UA = upper airway.