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

Yoshida, Michiko; Seiryu, Masahiro; Mayama, Atsushi; Takano-Yamamoto, Teruko; Mizoguchi, Itaru

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

Australasian Orthodontic Journal

Volume 38 (2022): Issue 2 (July 2022)

By:

Michiko Yoshida, Masahiro Seiryu, Atsushi Mayama, Teruko Takano-Yamamoto and Itaru Mizoguchi

Open Access

|Oct 2022

Figures & Tables

Pretreatment facial and intraoral photographs.

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

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.

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

Posttreatment facial and intraoral photographs.

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

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 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.

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.

Postretention facial and intraoral photographs.

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

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.

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

DOI: https://doi.org/10.2478/aoj-2022-032 | Journal eISSN: 2207-7480 | Journal ISSN: 2207-7472

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Language: English

Page range: 329 - 347

Submitted on: May 1, 2022

Accepted on: Aug 1, 2022

Published on: Oct 27, 2022

Published by: Australian Society of Orthodontists Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Related subjects:

Medicine,

Basic medical science,

Basic medical science, other

© 2022 Michiko Yoshida, Masahiro Seiryu, Atsushi Mayama, Teruko Takano-Yamamoto, Itaru Mizoguchi, published by Australian Society of Orthodontists Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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

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Maximum gap and displacement from the centric occlusion at each point_

Cephalometric summary_

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