Three-dimensional analysis of posterior tooth inclinations in transverse and sagittal relationships: A cross-sectional study

de Oliveira e Silva, Guto; Mendes, Thiago Santos; Carneiro, Diego Patrik Alves; Menezes, Carolina Carmo de; Vedovello, Silvia Amélia Scudeler; Terossi de Godoi, Ana Paula

doi:10.1016/j.ortho.2023.100824

Cited by 1 publication

(1 citation statement)

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“…Our findings are consistent with those of previous studies. Hwang et al 24 and de Oliveira et al 25 observed compensatory inclinations of the posterior teeth in the Class II groups. Class II malocclusions generally demonstrate a transverse dental discrepancy.…”

Section: Discussionmentioning

confidence: 95%

Three-dimensional analysis of the positional relationship between the dentition and basal bone region in patients with skeletal Class I and Class II malocclusion with mandibular retrusion

Wan,

Wen,

Geng

et al. 2024

Korean J Orthod

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Objective This study aimed to determine the maxillary and mandibular basal bone regions and explore the three-dimensional positional relationship between the dentition and basal bone regions in patients with skeletal Class I and Class II malocclusions with mandibular retrusion. Methods Eighty patients (40 each with Class I and Class II malocclusion) were enrolled. Maxillary and mandibular basal bone regions were determined using cone-beam computed tomography images. To measure the relationship between the dentition and basal bone region, the root position and root inclination were calculated using the coordinates of specific fixed points by a computer program written in Python. Results In the Class II group, the mandibular anterior teeth inclined more labially ( P < 0.05), with their apices positioned closer to the external boundary. The apex of the maxillary anterior root was positioned closer to the external boundary in both groups. Considering the molar region, the maxillary first molars tended to be more lingually inclined in females ( P = 0.037), whereas the mandibular first molars were significantly more labially inclined in the Class II group ( P < 0.05). Conclusions Mandibular anterior teeth in Class II malocclusion exhibit a compensatory labial inclination trend with the crown and apex relative to the basal bone region when mandibular retrusion occurs. Moreover, as the root apices of the maxillary anterior teeth are much closer to the labial side in Class I and Class II malocclusion, the range of movement at the root apex should be limited to avoid extensive labial movement.

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Section: Discussionmentioning

confidence: 95%