Table 1.
Findings of lateral cephalogram analyses before and after facemask therapy for an adolescent girl with skeletal Class III malocclusion and midface deficiency
| Measurement | Pretreatment | After facemask treatment |
Post-treatment |
|---|---|---|---|
| SNA (°) | 75.9 | 78.9 | 79.1 |
| SNB (°) | 79.4 | 81.1 | 81.5 |
| ANB (°) | −3.5 | −2.2 | −2.4 |
| A-Na perp (mm) | −1.57 | 0.73 | 0.84 |
| FMA (°) | 25.5 | 25.0 | 25.1 |
| SN-GoGn (°) | 34.4 | 34.0 | 34.1 |
| PP-SN (°) | 12.2 | 14.3 | 13.08 |
| U1-PP (°) | 127.3 | 128.5 | 133.1 |
| U1-SN (°) | 114.0 | 117.0 | 121.2 |
| IMPA (°) | 86.2 | 86.5 | 81.1 |
SNA, Sella–nasion–A point; SNB, sella–nasion–B point; ANB, A point–nasion–B point; A-Na perp, distance from A point to a line perpendicular to the Frankfort horizontal plane passing from the nasion point; FMA, Frankfort–mandibular plane angle; SN-GoGn, angle between sella–nasion and gonion-gnathion; PP-SN, angle between the palatal plane and sella–nasion; U1-PP, angle between the maxillary incisor and palatal plane; U1-SN, angle between the maxillary incisor and sella–nasion; IMPA, lower incisor to mandibular plane angle.