Interception of developing class III malocclusion with temporary anchorage devices: A case report
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Stomatological Outpatient Clinic in Olsztyn, Poland
Maxillo-Facial, Reconstructive and Esthetic Clinical Department in Children Hospital in Olsztyn, Poland
Submission date: 2014-07-01
Acceptance date: 2014-07-24
Online publication date: 2014-08-15
Publication date: 2020-04-06
Corresponding author
Maciej Dobrzyński   

Stomatological Outpatient Clinic in Olsztyn, Żołnierska 18, 10-561 Olsztyn, Poland. Tel.: +48 604 795 947.
Pol. Ann. Med. 2014;21(2):131-135
Class III malocclusion is a result of maxillary deficiency, mandibular prognathism or a combination of both, often accompanied by an anterior crossbite and a concave profile.

The aim of this work was to report and analyze a case of class III malocclusion.

Case study:
The patient, a 12-year-old boy, attended Maxillo-Facial Clinic with the complaint of his lower jaw being in front. The pre-treatment examination showed a slight flattened subnasal area and the reverse overjet. For the maxillary protraction, de Clerck method of bone anchors and class III elastics were applied. After previous palatal expansion, the boneanchored maxillary protraction was applied. The surgery was performed under general anesthesia. The surgical procedure consisted in placing four miniplates – one in each infrazygomatic buttress of the maxilla, and one in the anterior mandible between, and inferior to the left and right permanent lateral incisor and canine. The miniplates were loaded 3 weeks after the surgical procedure. After 7 months of treatment, the anterior crossbite was corrected.

Results and discussion:
Cephalometric evaluation between the beginning of treatment and the end of maxillary protraction showed marked increase in ANB and Wits. A counterclockwise rotation of the mandible was observed, as well as a slight clockwise rotation of the maxillary bone. The obtained results correspond to de Clerck's cephalometric investigations in class III patients who were treated with the use of bone-anchored maxillary protraction.

Temporary anchorage devices application enabled correction of the anterior crossbite and enhanced midfacial growth in young maxillary-deficient patient.

None declared.
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