Background: An orthodontic traction technique with a miniscrew- anchored cantilever spring was introduced for use in conjunction with clear aligners to perform traction of an impacted maxillary third molar that had caused severe root resorption of the adjacent second molar.
Case description: A 21-year-old woman with mild malocclusion sought multidisciplinary treatment for bilateral maxillary second molars, one of which was suffering from severe decay, while the other was subject to root resorption caused by the adjacent third molar, as shown on panoramic radiographs and CBCT images. The second molars were removed, and the impacted maxillary right third molar underwent orthodontic traction with the aid of a miniscrew-anchored cantilever spring. After 31 months of orthodontic treatment, both the maxillary and mandibular dentition had been aligned successfully and the patient was satisfied with the treatment outcome.
Practical implications: A miniscrew-anchored cantilever spring can not only work effectively for orthodontic traction of impacted third molars to substitute second molars with severe root resorption individually, but also cooperate well with clear aligners.
Schlagwörter: cantilever spring, Class II treatment, clear aligners, impacted teeth, miniscrew