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Orthodontic treatment of a transposed maxillary canine and first premolar in a young patient with Class III malocclusion.

Gracco A, Siviero L, Perri A, Favero L, Stellini E - Korean J Orthod (2015)

Bottom Line: After 25 months of active orthodontic treatment, the patient had a Class I molar and canine relationship on both sides, with ideal overbite and overjet values.The final panoramic radiograph showed that good root parallelism was achieved.Two-year follow-up intraoral photography showed stable results.

View Article: PubMed Central - PubMed

Affiliation: Department of Neuroscience, University of Padova, Padova, Italy.

ABSTRACT
A 12-year-old girl was referred to our clinic for evaluation of an unaesthetic dental appearance. All permanent teeth were erupted, while the deciduous maxillary right canine was retained. Cone-beam computed tomography revealed a complete transposition of the maxillary left canine and first premolar involving both the crowns and the roots. Initial cephalometric analysis showed a skeletal Class III pattern, with a slight maxillary retrusion and a compensated proclination of the upper incisors. The patient's teeth were considered to be in the correct position; therefore, we decided to attempt treatment by correcting the transposition and using only orthodontic compensation of the skeletal Class III malocclusion. After 25 months of active orthodontic treatment, the patient had a Class I molar and canine relationship on both sides, with ideal overbite and overjet values. Her profile was improved, her lips were competent, and cephalometric evaluation showed acceptable maxillary and mandibular incisor inclinations. The final panoramic radiograph showed that good root parallelism was achieved. Two-year follow-up intraoral photography showed stable results.

No MeSH data available.


Related in: MedlinePlus

Intraoral photographs at bonding stage. A high-torque central incisor bracket (+17o torque value) was bonded to the first left premolar to facilitate the correction of the transposition.
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Figure 5: Intraoral photographs at bonding stage. A high-torque central incisor bracket (+17o torque value) was bonded to the first left premolar to facilitate the correction of the transposition.

Mentions: Straightwire passive self-ligating brackets (Damon 3MX; Ormco Corporation, Orange, CA, USA) were placed on both arches. Because of the incisors' inclination and the plan to use Class III intermaxillary elastics to correct the molar and canine relationship, a low torque prescription was used on the upper frontal teeth (+7° torque value) and standard torque was used on the lower incisors (-1° torque value). In order to correct the transposition, an upper central incisor bracket with a higher torque prescription was bonded to the left first premolar (+17° torque value). The bracket slot was positioned at the same level as the second premolar bracket slot in order to prevent crown tipping. The root of the first premolar could thus be moved palatally without crown tipping (Figure 5).


Orthodontic treatment of a transposed maxillary canine and first premolar in a young patient with Class III malocclusion.

Gracco A, Siviero L, Perri A, Favero L, Stellini E - Korean J Orthod (2015)

Intraoral photographs at bonding stage. A high-torque central incisor bracket (+17o torque value) was bonded to the first left premolar to facilitate the correction of the transposition.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4664908&req=5

Figure 5: Intraoral photographs at bonding stage. A high-torque central incisor bracket (+17o torque value) was bonded to the first left premolar to facilitate the correction of the transposition.
Mentions: Straightwire passive self-ligating brackets (Damon 3MX; Ormco Corporation, Orange, CA, USA) were placed on both arches. Because of the incisors' inclination and the plan to use Class III intermaxillary elastics to correct the molar and canine relationship, a low torque prescription was used on the upper frontal teeth (+7° torque value) and standard torque was used on the lower incisors (-1° torque value). In order to correct the transposition, an upper central incisor bracket with a higher torque prescription was bonded to the left first premolar (+17° torque value). The bracket slot was positioned at the same level as the second premolar bracket slot in order to prevent crown tipping. The root of the first premolar could thus be moved palatally without crown tipping (Figure 5).

Bottom Line: After 25 months of active orthodontic treatment, the patient had a Class I molar and canine relationship on both sides, with ideal overbite and overjet values.The final panoramic radiograph showed that good root parallelism was achieved.Two-year follow-up intraoral photography showed stable results.

View Article: PubMed Central - PubMed

Affiliation: Department of Neuroscience, University of Padova, Padova, Italy.

ABSTRACT
A 12-year-old girl was referred to our clinic for evaluation of an unaesthetic dental appearance. All permanent teeth were erupted, while the deciduous maxillary right canine was retained. Cone-beam computed tomography revealed a complete transposition of the maxillary left canine and first premolar involving both the crowns and the roots. Initial cephalometric analysis showed a skeletal Class III pattern, with a slight maxillary retrusion and a compensated proclination of the upper incisors. The patient's teeth were considered to be in the correct position; therefore, we decided to attempt treatment by correcting the transposition and using only orthodontic compensation of the skeletal Class III malocclusion. After 25 months of active orthodontic treatment, the patient had a Class I molar and canine relationship on both sides, with ideal overbite and overjet values. Her profile was improved, her lips were competent, and cephalometric evaluation showed acceptable maxillary and mandibular incisor inclinations. The final panoramic radiograph showed that good root parallelism was achieved. Two-year follow-up intraoral photography showed stable results.

No MeSH data available.


Related in: MedlinePlus