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Bone availability in the sagittal dimension of the infrazygomatic crest for miniscrew insertion : a retrospective cone-beam computed tomography study
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Orientador(es)
Resumo(s)
Background: There is limited information available regarding the bone volume in the sagittal dimension of the infrazygomatic crest (IZC) that is safe for the insertion of a temporary skeletal anchorage device. The objective of this study was to assess the sagittal bone availability when the anterior and posterior walls of the IZC reach an inclination of 45°.
Methods: A cross-sectional investigation was undertaken on 100 cone-beam computed tomography scans of 40 males and 60 females. A total of 20 landmarks were digitized for each IZC outline, 1 mm from the vestibular alveolar bone, and their x, y, and z coordinates were extracted. Afterward, the sagittal measurement of the IZC at which the curvature reached 45° was recorded. Symmetry of measurements was assessed using paired-samples t tests. In addition, these measurements were compared as a function of sex and age group (≤21 vs >21 years) using an independent-samples t test and the Spearman rank correlation coefficient test (P <0.05).
Results: There were no significant differences between paired sagittal measurements of the IZC (3.5 ± 1.5 mm on the right side and 3.6 ± 1.3 mm on the left side; P = 0.144), except for younger patients (P = 0.030). In addition, no significant differences were found between corresponding male and female measurements (P ≥0.149). A significant discrepancy was identified between the younger age group (3.2 ± 1.2 mm) and the older cohort (3.8 ± 1.6 mm) for the sagittal dimension of the right IZC (P = 0.038), with an estimated mean difference of 0.03-1.16 mm (95% confidence interval). A significant positive weak correlation was found between the sagittal dimension of the right IZC and age (ρ = 0.201; P = 0.045).
Conclusions: Sufficient IZC bone volume is available at an angle of 45° for inserting a temporary skeletal anchorage device, with no sex or side variation, except for the significantly greater sagittal dimension of the right IZC in older patients.
Descrição
Palavras-chave
Bone availability sagittal dimension infrazygomatic crest miniscrew insertion cone-beam computed tomography
Contexto Educativo
Citação
Susana Furão, Iman Bugaighis, Luís Proença, José Brito, Hélder Nunes Costa, François Durand Pereira, Pedro Mariano Pereira, Bone availability in the sagittal dimension of the infrazygomatic crest for miniscrew insertion: A retrospective cone-beam computed tomography study, American Journal of Orthodontics and Dentofacial Orthopedics, Volume 169, Issue 5, 2026, Pages 568-576, https://doi.org/10.1016/j.ajodo.2025.10.016
Editora
Elsevier