Figure 1.
Pretreatment facial and intraoral photographs.
Figure 2.
Pretreatment dental models.
Figure 3.
Pretreatment radiographs and tracing: (A) lateral cephalometric radiograph; (B) cephalometric tracing; and (C) panoramic radiograph.
Table I.
Cephalometrio analysis.
| Variable | Norm | Pretreatment | Posttreatment |
|---|---|---|---|
| SNA,° | 82.8 | 76.2 | 76.0 |
| SNB,° | 80.1 | 71.9 | 73.0 |
| ANB,° | 2.7 | 4.3 | 3.0 |
| Wits appraisal, mm | 0.0 | 0.8 | -3.3 |
| SN-GoGn,° | 32.5 | 38.2 | 36.0 |
| U1-NA,° | 22.8 | 32.2 | 17.8 |
| UI-NA, mm | 5.0 | 8.5 | 3.5 |
| L1-NB,° | 30.3 | 31 | 25.9 |
| L1-NB, mm | 7.0 | 8.0 | 4.2 |
| FMA(MP-FH),° | 30.19 | 29.0 | 27.5 |
| IMPA(L1-MP),° | 95.59 | 100.5 | 95.5 |
| FMIA(L1-FH),° | 57.81 | 50.5 | 57.0 |
| Interincisal angle,° | 124.2 | 118.1 | 137.0 |
| Upper lip to E-line, mm | -4.0 | 3.0 | 0.5 |
| Lower lip to E-line, mm | -2.0 | 7.0 | 3.0 |
| Nasolabial angle,° | 110.0 | 77.0 | 90.0 |
Figure 4.
Digital setup: simulation of the final occlusal relationship.
Table II.
The overcorrection: extra crown angulation.
| Tooth position | Right Maxillary Canine | Right Maxillary Second Premolar | Left Maxillary Canine | Left Maxillary Second Premolar | Right Mandibular Canine | Right Mandibular Second premolar | Left Mandibular Canine | Left Mandibular Second Premolar |
|---|---|---|---|---|---|---|---|---|
| Mesial crown angulation | 4° | 5° | 4° | 4° | ||||
| Distal crown angulation | 4° | 4° | 5° | 4° |
Figure 5.
The lingual bracket system: 0.018”slot, vertical slots in the anterior brackets and horizontal slots in the posterior brackets.
Figure 6.
The maxillary and mandibular teeth were levelled and aligned in 4 months.
Figure 7.
A micro-screw was inserted between maxillary central incisors in the mucogingival junction and assisted in intruding the anterior teeth.
Figure 8.
Posttreatment facial and intraoral photographs.
Figure 9.
(A) pretreatment facial smile photograph; (B) posttreatment facial smile photograph: the ‘gummy’ smile was corrected after 3 months’ intrusion of the maxillary anterior teeth.
Figure 10.
(A) pretreatment facial profile photograph; (B–D) treatment facial profile photographs; (E) posttreatment facial profile photograph: the profile of the patient changed from convex to straight and a better-defined cervical-mental angle was created.
Figure 11.
Posttreatment dental models.
Figure 12.
Posttreatment radiographs and tracing: (A) lateral cephalometric radiograph; (B) cephalometric tracing; (C) panoramic radiograph.
Figure 13.
Cephalometric superimpositions of the initial (black), final (red) lateral cephalometric tracings: (A) centered on the cranial base; (B) centered on the palatal plane; (C) centered on the mandibular symphysis.
Figure 14.
(A) ribbon-wise arch wire; (B) traditional orthodontic wire: the ribbon-wise arch wire has a greater width than height in cross-section which makes the wire harder to bend in the vertical direction.