Root resorption of maxillary incisors retracted with and without skeletal anchorage.
BACKGROUND
Our objective was to compare root resorption degree of the maxillary central incisors retracted with and without skeletal anchorage.


METHODS
This nonrandomized historical control study included 37 patients requiring maximum anterior retraction and treated with extraction of 2 maxillary premolars. Group 1 consisted of 22 patients (11 male, 11 female) in whom anterior retraction was performed without skeletal anchorage, and group 2 included 15 patients (3 male, 12 female) treated with skeletally anchored anterior retraction. Periapical radiographs were used to evaluate root resorption degree by a scoring system. The groups were compared regarding the resorption score and resorption degree distribution with the Mann-Whitney U test, chi-square test, and Z test on proportions.


RESULTS
There was no statistically significant intergroup difference regarding root resorption, but the number of patients with severe and extreme root resorption degrees was significantly greater in group 2.


CONCLUSIONS
Although the root resorption degree of the skeletal anchorage group was not significantly different from the group without skeletal anchorage, the number of patients with severe to extreme resorption in the first group was significantly greater. Therefore, careful clinical monitoring of skeletally anchored anterior retraction is needed, especially when there are known root resorption predisposing factors.
Department of Orthodontics, Faculty of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil. Electronic address: sergioestelita@yahoo.com.br.
Sérgio Estelita
SE
Barros
Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.
Guilherme
G
Janson
Department of Orthodontics, School of Dentistry, São Leopoldo Mandic Dental Research Center, Campinas, São Paulo, Brazil.
Kelly
K
Chiqueto
Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.
Vitor Oliveira
VO
Baldo
Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.
Taiana Oliveira
TO
Baldo
D000293:Adolescent; D005260:Female; D065386:Historically Controlled Study; D006801:Humans; D007180:Incisor; D008297:Male; D008437:Maxilla; D052280:Orthodontic Anchorage Procedures; D012189:Retrospective Studies; D012391:Root Resorption / Q000628:therapy*; D055815:Young Adult