Abstract
Background
An orthodontic traction technique with a miniscrew-anchored cantilever spring was
used for the traction of a deeply impacted maxillary third molar to substitute its
adjacent second molar with severe root resorption.
Case Description
A 30-year-old woman sought multidisciplinary treatment planning for a second molar
with severe root resorption caused by a deeply impacted third molar. Panoramic radiographs
and cone-beam computed tomographic images showed that the third molar was located
on the apical and palatal side of the second molar and that the second molar had severe
root resorption. The second molar was removed, and the impacted third molar was orthodontically
tractioned occlusally with the aid of a miniscrew-anchored cantilever spring. After
12 months of orthodontic treatment, the maxillary left third molar was successfully
tractioned occlusally and well aligned with adjacent teeth for the substitution of
the second molar. The patient was satisfied with the treatment outcome.
Practical Implications
A palatal miniscrew-anchored cantilever spring is an effective and viable technique
for the orthodontic traction of deeply impacted third molars to substitute second
molars with severe root resorption.
Key Words
Abbreviation Key:
CBCT (Cone-beam computed tomography), SAT (Segmented arch technique)
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Biography
Dr. Pu is a resident, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Jing Zhou is a resident, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Yan is a resident, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Hong Zhou is a resident, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Liu is an associate professor, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Oral Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Yang is a professor, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of General Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Hua is a professor, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of General Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Zhang is an associate professor, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Lai is a professor, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Biography
Dr. Long is an associate professor, State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Article Info
Publication History
Published online: July 18, 2022
Publication stage
In Press Corrected Proof
Footnotes
Disclosures. None of the authors reported any disclosures.
The miniscrew-anchored cantilever spring appliance discussed in this article is protected by an invention patent registered in China (ZL202010999201.2).
This work was supported by grants 82171000 and 82071147 from the National Natural Science Foundation of China, grants 2018JY0558 and 2021YJ0428 from the Sichuan Science and Technology Program, research grants 19PJ233 and 20PJ090 from the Health Commission of Sichuan Province, CSA-02020-02 from the Chinese Stomatological Association Clinical Research Fund, and grants LCYJ2020-TD-2 and WCHS-201704 from the Research and Develop Program, West China Hospital of Stomatology, Sichuan University.
Identification
DOI: https://doi.org/10.1016/j.adaj.2022.05.010
Copyright
© 2022 American Dental Association. All rights reserved.
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