Three-dimensional evaluation of the correlation between lip canting and craniofacial planes

Abstract

This study aimed to analyze the correlation of horizontal and sagittal planes used in two-dimensional diagnosis with lip canting by using threedimensional (3D) analysis. Methods: Fifty-two patients (25 men, 27 women; average age: 24 years) undergoing treatment for dentofacial deformity were enrolled. Computed tomography images were acquired, and digital imaging and communication in medicine files were reconstructed into a 3D virtual model wherein horizontal and sagittal craniofacial planes were measured. Subsequently, the correlations of lip canting with these horizontal and sagittal planes were investigated. Results: The mandibular symmetry plane, the occlusal plane, Camper's plane, the mandibular plane, Broadbent's plane, and the nasal axis plane were correlated with the amount of lip canting (Pearson's correlation coefficients: 0.761, 0.648, 0.556, 0.526, 0.438, and 0.406, respectively). Planes associated with the lower part of the face showed the strongest correlations; the strength of the correlations decreased in the midfacial and cranial regions. None of the planes showed statistically significant differences between patients with clinical lip canting (> 3°) and those without prominent lip canting. Conclusions: The findings of this study suggest that lip canting is strongly correlated with the mandibular symmetry plane, which includes menton deviation. This finding may have clinical implications with regard to the treatment of patients requiring correction of lip canting. Further studies are necessary for evaluating changes in lip canting after orthognathic surgery.

Occlusal plane parallel to camper plane: reality or fallacy? A tomographic study on human Sambaqui skeletal remains

“…However, all the studied occlusal planes did not show parallelism with basal line of Camper plane. Our results are in accord to recent studies that used different methodologies [22][23][24] and our work reinforce the necessity of demystify some solidified concepts in dental field that has no realistic scientific support.…”

Relationship between Bilateral Landmarks of Facial Asymmetry in Skeletal Class II and Class III in Vertical Dimension: 3D Facial Scan and Cone-Beam Computed Tomography

“…Consequently, when the mandible displays deviation, it contributes to lip canting and deviations in other facial landmarks. This phenomenon was observed in 2D imaging studies conducted by Lee [30] and Hwang [31], and was further substantiated through 3D imaging research conducted by Kim [32].…”