Asymmetric orthodontic tooth extraction for a patient with severe dentition crowding after implant-support restoration: A case report

doi:10.3877/cma.j.issn.1674-1366.2022.02.007

Chinese Journal of Stomatological Research(Electronic Edition) ›› 2022, Vol. 16 ›› Issue (02): 106-112. doi: 10.3877/cma.j.issn.1674-1366.2022.02.007

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• Case Analysis • Previous Articles Next Articles

Asymmetric orthodontic tooth extraction for a patient with severe dentition crowding after implant-support restoration: A case report

Yuxia Feng¹, Zuolin Jin², Wen Qin²^,^†()

^1. Department of Stomatology, The 940th Hospital of Joint Logistics Support Force of Chinese People′s Liberation Army, Lanzhou 730050, China
^2. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases & Department of Orthodontics, School of Stomatology, the Third Affiliated Hospital of Air Force Military Medical University, Xi′an 710032, China

Received:2022-01-20 Online:2022-04-01 Published:2022-06-14
Contact: Wen Qin
Supported by:
National Natural Science Foundation of China(82001079); New Technology and New Business Program of the Third Affiliated Hospital of Air Force Military Medical University(LX2021-322)

Abstract

Abstract:

An adult female case with severe dentition crowding after implant-supported restoration was reported. Through the analysis of model and cephalometric measurement, the orthodontic effect of the patient was predicted by 3Shape software before treatment. Finally, the personalized reduction treatment scheme of mandibular asymmetric tooth extraction was adopted to achieve satisfactory results. In this case, in the treatment of asymmetric tooth extraction, sequential tooth extraction was used to minimize the arch collapse caused by early extraction of the posterior mandibular teeth, so as to obtain good arch symmetry and reasonable and effective use of extraction space.

Key words: Implant denture restoration, Asymmetric tooth extraction, Severe dentition crowding

Yuxia Feng, Zuolin Jin, Wen Qin. Asymmetric orthodontic tooth extraction for a patient with severe dentition crowding after implant-support restoration: A case report[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2022, 16(02): 106-112.

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Figures/Tables 11

References 13

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测量项目	正常值（±s）	治疗前	治疗后
SNA（°）	82.8 ± 4.0	87.9	87.5
SNB（°）	80.1 ± 3.9	81.5	81.7
ANB（°）	2.7 ± 2.0	6.3	5.8
SND（°）	77.3 ± 3.8	78.5	78.9
U1-NA（mm）	5.1 ± 2.4	2.5	2.9
U1-NA（°）	22.8 ± 5.7	21.2	23.5
L1-NB（mm）	6.7 ± 2.1	7.9	6.5
L1-NB（°）	30.3 ± 5.8	34.0	32.5
U1-L1（°）	124.2 ± 8.2	118.5	126.0
Po-NB（mm）	1.0 ± 1.5	0.5	0.5
OP-SN（°）	16.1 ± 5.0	21.3	18.5
GoGn-SN（°）	32.5 ± 5.2	29.1	28.5
FMA（°）	30.19 ± 4.01	26.0	26.4
IMPA（°）	95.59 ± 5.04	99.8	97.5
FMIA（°）	54.22 ± 4.44	54.2	56.1

测量项目	正常值（±s）	治疗前	治疗后
SNA（°）	82.8 ± 4.0	87.9	87.5
SNB（°）	80.1 ± 3.9	81.5	81.7
ANB（°）	2.7 ± 2.0	6.3	5.8
SND（°）	77.3 ± 3.8	78.5	78.9
U1-NA（mm）	5.1 ± 2.4	2.5	2.9
U1-NA（°）	22.8 ± 5.7	21.2	23.5
L1-NB（mm）	6.7 ± 2.1	7.9	6.5
L1-NB（°）	30.3 ± 5.8	34.0	32.5
U1-L1（°）	124.2 ± 8.2	118.5	126.0
Po-NB（mm）	1.0 ± 1.5	0.5	0.5
OP-SN（°）	16.1 ± 5.0	21.3	18.5
GoGn-SN（°）	32.5 ± 5.2	29.1	28.5
FMA（°）	30.19 ± 4.01	26.0	26.4
IMPA（°）	95.59 ± 5.04	99.8	97.5
FMIA（°）	54.22 ± 4.44	54.2	56.1

牙位	骨皮质厚度	牙位	骨皮质厚度
11	0.93	31	1.03
12	1.13	32	1.12
13	0.93	33	1.01
14	1.02	34	1.10
15	1.53	35	1.08
16	2.00	36	1.89
21	1.00	41	1.02
22	1.02	42	1.05
23	0.99	43	0.99
24	1.22	44	1.10
25	1.56	45	1.09
26	1.83	46	1.94

牙位	骨皮质厚度	牙位	骨皮质厚度
11	0.93	31	1.03
12	1.13	32	1.12
13	0.93	33	1.01
14	1.02	34	1.10
15	1.53	35	1.08
16	2.00	36	1.89
21	1.00	41	1.02
22	1.02	42	1.05
23	0.99	43	0.99
24	1.22	44	1.10
25	1.56	45	1.09
26	1.83	46	1.94

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