Case Report
Correction of a Class III Malocclusion with a Functional Shift and Severe Crowding
Table 1
Pre- and posttreatment cephalometric measurements.
| | Measurement | Mean (±SD) | Saudi norms | Patient | | Initial | Final |
| | Anteroposterior | SNA (°) | 82° (±3.3) | 80.8 (±4.06) | 77.6 | 78.8 | | SNB (°) | 80° (±3.1) | 77.5 (±4.48) | 79.4 | 77.4 | | ANB (°) | 2° (±1.7) | 3.7 (±1.5) | -1.8 | 1.4 | | Wits (mm) | (±1.9)
(±1.77) | 0.13 (±2.47) | -4.9 | -1 mm | | Angle of convexity NA-APg (°) | 0° (±5.1) | 5.01 (±3.05) | 11 | 8 | | A-B plane AB:NPg (°) | -4.6° (±3.7) | -4.6° (±3.7) | 4 | 1 |
| | Vertical | MP (Go-Gn):SN (°) | 32° (±3.5) | 35.9 (±5.96) | 44 | 41 | | MP (tangent lower border):FH (°) | 21.9° (±3.2) | 28.5 (±4.79) | 41 | 36 | | Pg:NB (mm) | 4 (±2) | 4 (±2) | 0.1 | 0.1 | | -axis (SGn:FH) | 59.4° (±3.8) | 69.6 (±4.2) | 71 | 70 | | LAFH (ANS to Gn ÷ N to Gn) | 0.57 (±0.02) | 0.57 (±0.02) | 0.57 | 0.6 | | OP:SN (°) | 14° (±4.1) | 14° (±4.1) | 11.2 | 12 | | OP:FH (°) | 9.3° (±3.8) | 9.3° (±3.8) | 8.1 | 8.7 |
| | Dental | U1 to palatal plane (°) | 109° (±6) | 109° (±6) | 108 | 112 | | U1 to NA (°) | 22° (±6.1) | 27.3 (±7.5) | 16.8 | 27.5 | | U1 to NA (mm) | 4 (±1.2) | 6.8 (±2.9) | 2 | 3 | | L1 to NB (°) | 25° (±4.5) | 29.34 (±6.98) | 31 | 35.5 | | L1 to NB (mm) | 4 (±1.5) | 7.52 (±2.63) | 3 | 4 | | U1 to L1 (°) (Avg. Downs & Steiner) | 131.7° (±6.5) | 120 (±11.98) | 124 | 113 | | U1:APg (mm) | 2.7 (±1.8) | | 1.3 | 2.5 | | L1:APg (mm) | 1 (±2) | | 3.1 | 3.9 | | FMA (°) | 25° (16-35) | | 50 | 50 | | FMIA (°) | 65° (60-75) | | 41 | 36 | | IMPA (°) | 90° (85-95) | | 89 | 94 |
| | Soft tissue | Facial convexity–G Sn Pg (°) | 12° (±4) | | 9 | 9 | | Facial angle (FH:NPg) (°) | 90-92° | | 92 | 91 | | Nasolabial angle (°) | 90-110° | 80.8 (±4.06) | 103 | 103 | | Esthetic plane (E-line)—upper lip | -4 mm | 77.5 (±4.48) | -2 | -3 | | Esthetic plane (E-line)—lower lip | -2 mm | 3.7 (±1.5) | -1 | 0 |
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