Study of alveolar ridge dimensions before and after orthodontic treatment in maxillary lateral incisor agenesis: A pilot study.
The objective of this study was to compare the dimensional changes in the alveolar ridge before, at the end of, and one year after orthodontic treatment in cases of Maxillary Lateral Incisor Agenesis and the possibility of using plaster models and panoramic radiographs as substitutes for cone beam-computed tomography.


METHODS
A total of 228 measurements were performed on plaster models and panoramic radiographs: before (T1), at the end of (T2), and 1 year after orthodontic treatment (T3). At stage T2, the cone beam-computed tomography was also analyzed. Non-parametric tests were used.


RESULTS
In all 3 stages, there was no statistically significant difference regarding the thickness of the models, the height of the bone in the panoramic radiographs, the space opening and the height of the bone in the panoramic radiographs, or the space opening in the models and the thickness in the same plaster models. However, a statistically significant difference was observed for the width in the panoramic radiograph during all 3 stages. Cone beam-computed tomography did not reveal a statistically significant correlation regarding the height and width of the bone compared with the panoramic radiographs, and the thickness as compared with plaster models.


CONCLUSIONS
There was no significant variation in thickness, height and width of the bone over time. It was demonstrated that plaster models and panoramic radiographs do not appear to be good substitutes for cone beam-computed tomography for these specific measurements.
Instituto Universitário de Ciências da Saúde, CESPU, Instituto de Investigacão e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central de Gandra, 1317, 4585-116 Gandra PRD, Portugal.
Selma
S
Pascoal
Instituto Universitário de Ciências da Saúde, CESPU, Instituto de Investigacão e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central de Gandra, 1317, 4585-116 Gandra PRD, Portugal; IBMC (Inst. Biologia Molecular e Celular), i3S (Inst. Inovação e Investigação em Saúde), Universidade do Porto, Porto, Portugal. Electronic address: teresa.pinho@iucs.cespu.pt.
Teresa
T
Pinho
D000293:Adolescent; D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D000848:Anodontia / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D054893:Cone-Beam Computed Tomography; D006801:Humans; D007180:Incisor / Q000002:abnormalities*; D008437:Maxilla; D003765:Models, Dental; D010865:Pilot Projects; D011862:Radiography, Panoramic; D014087:Tooth Movement Techniques
Alveolar ridge; Cone beam-computed tomography (CBCT); Congenitally-missing maxillary lateral incisor; Space opening