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Case Reports
. 2021 Jul 28:2021:4285330.
doi: 10.1155/2021/4285330. eCollection 2021.

TAD's for the Derotation of 90° Rotated Maxillary Bicuspids

Hasan Sabah Hasan  1 , Ayshan Kolemen  2 , Mohamed Elkolaly  3 , Anand Marya  4 , Shreyas Gujjar  5 , Adith Venugopal  4   6
Affiliations
Case Reports

TAD's for the Derotation of 90° Rotated Maxillary Bicuspids

Hasan Sabah Hasan et al. Case Rep Dent. .

Abstract

It is undeniable that the advent of extra-alveolar mini-implants for anchorage purposes has revolutionized the field of Orthodontics. This case report sheds light on an innovative anchorage plan using TADs, to carry out treatment for a 15-year-old female patient. The patient reported to the clinic with a chief complaint of rotated second premolars, crowding, and a deep bite. On examination, it was seen that the patient had a Class I skeletal pattern, Class II subdivision molar relationship, 90-degree maxillary second premolar rotations, crowding in both the arches, and a deep bite. In this case, the clinicians decided to use TADs for premolar derotation as it not only provides a pure rotational couple without any deleterious effects on the adjacent teeth but also helps shorten the overall treatment time. The total treatment time for this case was 10 months.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Pretreatment extra-oral and intra-oral pictures.
Figure 2
Figure 2
Pretreatment cephalogram and panoramic radiograph with analysis of the lateral cephalogram using the Steiner analysis.
Figure 3
Figure 3
Showing treatment progress; (a, b) simultaneous leveling and alignment stage with derotation of the upper second premolars, (c) en masse retraction, (d) usage of elastic rings for maximum intercuspation.
Figure 4
Figure 4
(a–c) Occlusal pictures showing derotation of premolars using couple mechanics. (d) Space closure. (e) CSF technique.
Figure 5
Figure 5
Posttreatment extra and intraoral images.
Figure 6
Figure 6
Posttreatment cephalogram and panoramic radiograph with analysis of the lateral cephalogram using the Steiner analysis.
Figure 7
Figure 7
Posttreatment extra- and intraoral images 5 years posttreatment.
See this image and copyright information in PMC

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