New classification of lingual arch form in normal occlusion using three dimensional virtual models

Korean Journal of Orthodontics
Kyung Hee ParkYoon-Ah Kook

Abstract

The purposes of this study were 1) to classify lingual dental arch form types based on the lingual bracket points and 2) to provide a new lingual arch form template based on this classification for clinical application through the analysis of three-dimensional virtual models of normal occlusion sample. Maxillary and mandibular casts of 115 young adults with normal occlusion were scanned in their occluded positions and lingual bracket points were digitized on the virtual models by using Rapidform 2006 software. Sixty-eight cases (dataset 1) were used in K-means cluster analysis to classify arch forms with intercanine, interpremolar and intermolar widths and width/depth ratios as determinants. The best-fit curves of the mean arch forms were generated. The remaining cases (dataset 2) were mapped into the obtained clusters and a multivariate test was performed to assess the differences between the clusters. Four-cluster classification demonstrated maximum intercluster distance. Wide, narrow, tapering, and ovoid types were described according to the intercanine and intermolar widths and their best-fit curves were depicted. No significant differences in arch depths existed among the clusters. Strong to moderate correlations were foun...Continue Reading

References

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Citations

Jul 4, 2017·Korean Journal of Orthodontics·Stephanie Maritza AndersonSu-Jung Kim
Oct 3, 2018·Imaging Science in Dentistry·Atcharee Bulyalert, Atiphan Pimkhaokham
Nov 17, 2020·Clinical, Cosmetic and Investigational Dentistry·Dashrath KafleRajeev Kumar Mishra
Jul 8, 2021·Dental press journal of orthodontics·Silvana Allegrini KairallaShirley Shizue Nagata Pignatari

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Software Mentioned

MATLAB
SPSS
Rapidform

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