Apical root resorption of maxillary fi rst molars related to headgear use as detected by cone beam computed tomography
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Data
2011-12
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Resumo
Extraoral traction (EOT) by occipital headgear is a widely used anchorage and orthopedic
approach for the control of maxillary growth. The aims of this study were: 1) to test the hypothesis
that headgear use may increase the risk of apical root resorption, using cone beam computed
tomography (CBCT) to detect root resorptions of maxillary fi rst molars, and 2) to assess which
roots are more prone to resorption and to which extent. A total of 112 maxillary fi rst molars from
56 patients at 52 to 288 months after orthodontic treatment were evaluated to detect apical root
resorption on CBCT images. Patients were divided into two groups: Group 1, patients who used
EOT for up to six months; Group 2, patients who did not use EOT. The Levander and Malmgren
scoring system was used to classify the root apices of maxillary fi rst molars. Signifi cance was set
at 5%. Kappa statistics was used to assess agreement; scores were evaluated twice, according to the
study methods. There were no differences in the frequency and severity of apical root resorption of
maxillary fi rst permanent molars in the two groups as detected by CBCT. The use of EOT did not
show association with frequency and severity of ARR considering a long time of follow up.
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Palavras-chave
Extraoral traction, Orthodontic treatment, Root resorption, Cone beam computed tomography, Tração extraoral, Tratamento ortodôntico, Reabsorção radicular, Tomografia computadorizada cone beam
Citação
FREITAS, Jairo Curado de. Apical root resorption of maxillary first molars related to headgear by cone beam computed tomography. Stomatos, Canoas, v. 17, n. 33, p. 4-11, July/Dec. 2011.