V24N03 | 2019 | Online Article | Pages 45 to 45
Marcos J. Carruitero, Ximena M. Ambrosio-Vallejos, Carlos Flores-Mir
profile. Diagnosis. Orthodontics. Orthognathic surgery.
Objective: The aim of this study was to evaluate the use of glabellar vertical line (GVL) as the anteroposterior maxillary position goal. Methods: A cross-sectional study was conducted assessing 129 participants (20.21 ± 1.99 years): 67 women (20.16 ± 1.99 years), and 62 males (20.26 ± 2.06 years). The facial profile photographs were taken with a posed smile in natural head position. The linear distance from the most facial convexity of the upper central incisor (FA) to the goal anterior-limit line (GALL) and also from FA to GVL were measured and compared. Wilcoxon signed-ranks test was applied. To determine the correlation between the distances, Spearman’s correlation coefficient was used. Simple and multiple linear regression were also performed. Results: The GALL-GVL separation was 0.54 ± 1.14 mm (95%CI: 0.34-0.74). A strong correlation between FA-GALL and FA-GVL distances (Spearman’s rho=0.983 (95%CI: 0.976-0.988), p < 0.01) was identified. The FA-GVL distance explains almost all the total variation of FA-GALL (R2=95.84%, p < 0.01). The FA-GALL distance can be predicted by using the formula: FA-GALL=0.5+0.9*(FA-GVL). Conclusion: These findings suggest that GVL could be used as an easier-to-use treatment goal to determine the maxillary anteroposterior position, compared to GALL, to improve facial harmony profile goals in cases where the maxillary incisors are properly positioned anteroposteriorly.
Carruitero MJ, Ambrosio-Vallejos XM, Flores-Mir C. Glabellar vertical line as a reference goal for anteroposterior maxillary position. Dental Press J Orthod. 2019 May-June;24(3):45.e1-5. DOI: //doi.org/10.1590/2177-6709.24.3.45.e1-5.onl