Incisor root resorption due to ectopic maxillary canines: a long-term radiographic follow-up.
OBJECTIVE
To document the long-term fate of maxillary incisors with resorbed roots after correction of the associated ectopic canines.


METHODS
The subjects were recruited from 107 children and adolescents age 9-15 years (mean 12.5 years) at initial registration, with 156 ectopically positioned maxillary canines. The children were referred to the specialist orthodontic clinic for consultation because of the risk of incisor root resorption. Of 51 patients contacted, 16 failed to attend. Eight of the remaining 35 were excluded because their lateral incisors had been extracted, leaving 27 subjects for follow-up registration. At initial consultation, all subjects had undergone radiographic examination, including computed tomography (CT) scans. At the follow-up consultation, the radiographic examination was limited to intraoral films.


RESULTS
No resorbed incisor was lost during the 2- to 10-year follow-up period. The resorptive lesions had undergone repair in 13 teeth, remained unchanged in 12 teeth and progressed in 7 teeth. In the 13 teeth exhibiting signs of repair, no resorption was detectable in 11 teeth and minor resorption was detected in 2 lateral incisors. At the initial registration, severe or moderate resorption had been diagnosed in 12 lateral and 5 central incisors, compared with 11 lateral and 6 central incisors at follow-up. In 10 subjects initially diagnosed with resorption of 13 incisors, the lesions were no longer discernible on intraoral radiographs at follow-up.


CONCLUSIONS
Even in cases of severe resorption, the incisor roots show good long-term healing. Incisors with root resorption can be used in an orthodontic appliance system.
Falahat
Babak
B
Department of Oral and Maxillofacial Radiology, Karolinska Institutet, Stockholm, Sweden.
Ericson
Sune
S
Mak D'Amico
Rozmary
R
Bjerklin
Krister
K
D000293:Adolescent; D016301:Alveolar Bone Loss / Q000517:prevention & control; D016723:Bone Remodeling / Q000502:physiology; D002648:Child; D003481:Cuspid / Q000473:pathology*; D003782:Dental Pulp / Q000000981:diagnostic imaging; D003789:Dental Pulp Exposure / Q000000981:diagnostic imaging / Q000209:etiology; D003804:Dentin / Q000000981:diagnostic imaging; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000000981:diagnostic imaging / Q000473:pathology*; D008137:Longitudinal Studies; D008297:Male; D008437:Maxilla; D016300:Radiography, Bitewing; D012391:Root Resorption / Q000000981:diagnostic imaging / Q000209:etiology*; D014057:Tomography, X-Ray Computed; D014079:Tooth Eruption, Ectopic / Q000150:complications* / Q000628:therapy; D016388:Tooth Loss / Q000517:prevention & control; D014095:Tooth, Impacted / Q000150:complications / Q000628:therapy; D014945:Wound Healing / Q000502:physiology