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Class III malocclusion with traumatic unilateral maxillary central incisor loss treated using orthodontic miniscrews: a case report

Michiko Yoshida
Michiko Yoshida
, 
Masahiro Seiryu
Masahiro Seiryu
, 
Atsushi Mayama
Atsushi Mayama
, 
Teruko Takano-Yamamoto
Teruko Takano-Yamamoto
 und 
Itaru Mizoguchi
Itaru Mizoguchi
   | 27. Okt. 2022
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Online veröffentlicht: 27. Okt. 2022
Seitenbereich: 329 - 347
Eingereicht: 01. Mai 2022
Akzeptiert: 01. Aug. 2022
DOI: https://doi.org/10.2478/aoj-2022-032
© 2022 Michiko Yoshida et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 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 cephalograms, a tracing of lateral cephalogram and a panoramic radiograph. (A) Lateral cephalogram. (B) Tracing. (C) Posteroanterior cephalogram. (D) Panoramic radiograph.
Pretreatment cephalograms, a tracing of lateral cephalogram and a panoramic radiograph. (A) Lateral cephalogram. (B) Tracing. (C) Posteroanterior cephalogram. (D) Panoramic radiograph.

Figure 4.

Pretreatment condylar movements and incisal paths as detected using a 6 degrees of freedom jaw movement recording system. Opening and closing, protrusive, and lateral jaw movements. The red line indicates the opening phase, and the blue line indicates the closing phase.
Pretreatment condylar movements and incisal paths as detected using a 6 degrees of freedom jaw movement recording system. Opening and closing, protrusive, and lateral jaw movements. The red line indicates the opening phase, and the blue line indicates the closing phase.

Figure 5.

Intraoral photographs of the treatment progress. Retraction of the maxillary anterior teeth and distalization of the mandibular dentition.
Intraoral photographs of the treatment progress. Retraction of the maxillary anterior teeth and distalization of the mandibular dentition.

Figure 6.

Posttreatment facial and intraoral photographs.
Posttreatment facial and intraoral photographs.

Figure 7.

Posttreatment dental casts.
Posttreatment dental casts.

Figure 8.

Posttreatment cephalograms, a tracing of lateral cephalogram and a panoramic radiograph. (A) Lateral cephalogram. (B) Tracing. (C) Posteroanterior cephalogram. (D) Panoramic radiograph.
Posttreatment cephalograms, a tracing of lateral cephalogram and a panoramic radiograph. (A) Lateral cephalogram. (B) Tracing. (C) Posteroanterior cephalogram. (D) Panoramic radiograph.

Figure 9.

Superimposition of the cephalometric tracings obtained at pretreatment (solid line) and posttreatment (dotted line). (A, D) The sella-nasion plane at the sella. (B, E) The palatal plane at the ANS. (C, F) The mandibular plane at the menton. (A–C) The right incisors and molars. (D–F) The left incisors and molars.
Superimposition of the cephalometric tracings obtained at pretreatment (solid line) and posttreatment (dotted line). (A, D) The sella-nasion plane at the sella. (B, E) The palatal plane at the ANS. (C, F) The mandibular plane at the menton. (A–C) The right incisors and molars. (D–F) The left incisors and molars.

Figure 10.

Superimposition of dental casts at pretreatment (light blue) and posttreatment (yellow-green) captured by a three-dimensional scanner. (A) The maxillary dental casts were superimposed at palate regions including the third palatal rugae.13,14 (B) The mandibular dental casts were superimposed at the mandibular torus.15 Red arrows indicate the movement of the upper and lower incisors and molars.
Superimposition of dental casts at pretreatment (light blue) and posttreatment (yellow-green) captured by a three-dimensional scanner. (A) The maxillary dental casts were superimposed at palate regions including the third palatal rugae.13,14 (B) The mandibular dental casts were superimposed at the mandibular torus.15 Red arrows indicate the movement of the upper and lower incisors and molars.

Figure 11.

Posttreatment condylar movements and incisal paths as detected using a 6 degrees of freedom jaw movement recording system. Opening and closing, protrusive, and lateral jaw movements. The red line indicates the opening phase, and the blue line indicates the closing phase.
Posttreatment condylar movements and incisal paths as detected using a 6 degrees of freedom jaw movement recording system. Opening and closing, protrusive, and lateral jaw movements. The red line indicates the opening phase, and the blue line indicates the closing phase.

Figure 12.

Postretention facial and intraoral photographs.
Postretention facial and intraoral photographs.

Figure 13.

Postretention dental casts.
Postretention dental casts.

Figure 14.

Postretention cephalograms, a tracing of lateral cephalogram and a panoramic radiograph. (A) Lateral cephalogram. (B) Tracing. (C) Posteroanterior cephalogram. (D) Panoramic radiograph.
Postretention cephalograms, a tracing of lateral cephalogram and a panoramic radiograph. (A) Lateral cephalogram. (B) Tracing. (C) Posteroanterior cephalogram. (D) Panoramic radiograph.

Figure 15.

Superimposition of the cephalometric tracings obtained at posttreatment (solid line) and postretention (dotted line). (A) The sella-nasion plane at the sella. (B) The palatal plane at the ANS. (C) The mandibular plane at the menton.
Superimposition of the cephalometric tracings obtained at posttreatment (solid line) and postretention (dotted line). (A) The sella-nasion plane at the sella. (B) The palatal plane at the ANS. (C) The mandibular plane at the menton.

Figure 16.

Postretention condylar movements and incisal paths as detected using a 6 degrees of freedom jaw movement recording system. Opening and closing, protrusive, and lateral jaw movements. The red line indicates the opening phase, and the blue line indicates the closing phase.
Postretention condylar movements and incisal paths as detected using a 6 degrees of freedom jaw movement recording system. Opening and closing, protrusive, and lateral jaw movements. The red line indicates the opening phase, and the blue line indicates the closing phase.

Maximum gap and displacement from the centric occlusion at each point.

Japanese norm* SD Pretreatment Posttreatment Postretention
(Adult female) (23y1m) (26y1m) (28y6m)
Maximum gap (mm)
      at right condyle 13.1 2.7 15.2 11.7 13.4
      at left condyle 13.1 3.8 15.1 14.3 14.8
      at lower incisor 44.8 6.4 55.2 54.0 46.0
Maximum displacement during protrusive excursive movement (mm)
      at right condyle 7.6 1.6 6.2 7.3 6.2
      at left condyle 7.6 1.6 4.9 5.9 6.0
      at lower incisor 7.2 1.5 5.4 6.3 5.8
Maximum displacement during right lateral excursive movement(mm)
      at left condyle 9.1 2.7 3.7 4.6 5.7
      at lower incisor 8.3 2.1 3.7 3.0 4.9
Maximum displacement during left lateral excursive movement (mm)
      at right condyle 9.1 2.7 0.4 4.1 6.0
      at lower incisor 8.3 2.1 1.0 2.9 4.7

Cephalometric summary.

Japanese norm* SD Pretreatment Posttreatment Postretention
(Adult female) (23y1m) (26y1m) (28y6m)
Angular(°)
SNA 80.8 3.61 83.2 83.2 83.3
SNB 77.9 4.54 85.5 85.6 85.7
ANB 2.8 2.44 -2.3 -2.4 -2.4
Mp-SN 37.1 4.64 26.9 25.8 25.5
Gonial A 122.1 5.29 117.5 117.8 117.6
U1-SN 105.9 8.79 125.1 123.1 121.4
L1-FH 56.0 8.09 63.4 71.7 69.9
L1-Mp 9.34 6.77 92.5 85.2 87 1
Inter incisal angle 123.6 10.64 115.6 126.0 126.0
Linear (mm)
S-N 67.9 3.65 69.6 69.7 69.7
N-Me 125.8 5.04 124.7 123.2 122.9
Me/NF 68.6 3.71 69.4 67.6 67.5
Go-Me 71.4 4.14 77.0 77.2 77.1
Ar-Go 47.3 3.33 54.6 54.7 54.7
Ar-Me 106.6 5.74 117.1 117.4 117.4
U1/NF 31.0 2.34 25.3 23.5 24.4
U6/NF 24.6 2.00 24.4 24.3 24.4
L1/Mp 44.2 2.68 47.1 45.6 44.9
L6/Mp 32.9 2.50 36.1 33.4 33.4
Overjet 3.1 1.07 3.8 3.1 2.1
Overbite 3.3 1 89 1.3 1.7 1.9
E-line to Upper lip -2.5 1.90 0.5 -1.0 -1.1
E-line to Lower lip 0.9 1.90 3.3 0.0 0.7
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