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Distalisation of the dental arches using clear aligners and miniscrews

Hanshi Li
Hanshi Li
, 
Li Mei
Li Mei
, 
Yan Yang
Yan Yang
, 
Xin Zhao
Xin Zhao
 oraz 
Yu Li
Yu Li
   | 13 lip 2021
Australasian Orthodontic Journal's Cover Image
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Article Category: research-article
Data publikacji: 13 lip 2021
Zakres stron: 128 - 138
DOI: https://doi.org/10.21307/aoj-2021-014
© 2021 Hanshi Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Pretreatment facial and intraoral photographs.
Pretreatment facial and intraoral photographs.

Figure 2.

Pretreatment dental casts.
Pretreatment dental casts.

Figure 3.

Pretreatment cephalometric radiograph (top left) and tracing (top right) and panoramic radiograph (bottom).
Pretreatment cephalometric radiograph (top left) and tracing (top right) and panoramic radiograph (bottom).

Figure 4.

Intraoral photographs showing the elastics running from the precision-cuts to the miniscrews.
Intraoral photographs showing the elastics running from the precision-cuts to the miniscrews.

Figure 5.

Facial and intraoral photographs before the first refinement during treatment.
Facial and intraoral photographs before the first refinement during treatment.

Figure 6.

Post-treatment facial and intraoral photographs.
Post-treatment facial and intraoral photographs.

Figure 7.

Post-treatment dental casts.
Post-treatment dental casts.

Figure 8.

Facial and intraoral photographs after 1.5 years retention. The upper two miniscrews remained in the oral cavity for retention (elastics from the cuts in the retainer to the miniscrews).
Facial and intraoral photographs after 1.5 years retention. The upper two miniscrews remained in the oral cavity for retention (elastics from the cuts in the retainer to the miniscrews).

Figure 9.

Post-treatment cephalometric radiograph (top left) and tracing (top right) and panoramic radiograph (bottom).
Post-treatment cephalometric radiograph (top left) and tracing (top right) and panoramic radiograph (bottom).

Figure 10.

Superimposition of the pretreatment (black line) and post-treatment (red line) cephalometric radiographs.
Superimposition of the pretreatment (black line) and post-treatment (red line) cephalometric radiographs.

Figure 11.

Superimposition of the pretreatment (black line) and post-treatment (red line) cephalometric radiographs (maxilla and mandible alone).
Superimposition of the pretreatment (black line) and post-treatment (red line) cephalometric radiographs (maxilla and mandible alone).

Figure 12.

Superimposition of the post-treatment (red line) and the 1.5-year retention (green line) cephalometric radiographs.
Superimposition of the post-treatment (red line) and the 1.5-year retention (green line) cephalometric radiographs.

Cephalometric analyses before and after the treatment.

Measurement Normal43, 44 Before After Changes*
Skeletal
SNA (Sella-Nasion-point A, °) 83.6 ± 3.6 84.8 83.2 -1.6
SNB (Sella-Nasion-point B, °) 79.7 ± 3.6 81.5 79.3 -2.2
ANB (Point A-Nasion-point B, °) 3.9 ± 1.8 3.0 3.9 -0.9
SN-MP (SN plane-mandibular plane, °) 32.9 ± 4.0 34.4 35.9 1.5
S-Go/N-Me (Sella-gonion/nasion-menton, %) 65.9 ± 4.0 67.3 66.1 -1.2
Dental
U1-L1 (Axial inclination of upper and lower incisors, °) 117.6 ± 8.8 116.7 115.8 -0.9
U1-SN (U1-sella nasion, °) 65.0 ± 7.5 67.9 66.9 -1.0
U1-AP (Protrusion of maxillary incisors, mm) 6.7 ± 2.0 10.8 8.6 -2.2
L1-AP (Protrusion of mandibular incisors, mm) 3.0 ± 2.0 8.3 5.1 -3.2
FMIA (Frankfort horizontal plane-L1, °) 57.0 ± 7.0 57.5 61.6 4.1
U1-PP (U1-palatal plane, mm) 27.5 ± 2.0 30.5 29.7 -0.8
U6-PP (U6-palatal plane, mm) 21.5 ± 2.0 26.6 25.6 -1.0
Ptv-U6 (Pterygomaxillary fissure-U6, mm) 18.0 ± 3.0 22.8 19.8 -3.0
Profile
Upper lip to E-plane (mm) -1.5 ± 2.4 1.0 -1.1 -2.1
Lower lip to E-plane (mm) 0.9 ± 2.5 4.5 1.6 -2.9
eISSN:
2207-7480
Język:
Angielski
Częstotliwość wydawania:
Volume Open
Dziedziny czasopisma:
Medicine, Basic Medical Science, other
Kanał RSS czasopisma