Figure 2From: Lip closing force of Class III patients with mandibular prognathism: a case control study Measurements used in this study (continued). 1, FMA (Frankfort Plane - Mandibular Plane Angle); 2, U1-FH (Upper Incisor - Frankfort Plane Angle); 3, IPMA (Lower Incisor - Mandibular Plane Angle); 4. ANS-Ptm (length of maxilla); 5, Co-Pog (length of mandible).Back to article page