Shape Visualization of Dental Inclination in Class I and Bimaxillary Protrusion Malocclusions through Geometric Morphometric Analysis

Authors

  • SB Oon Centre of Paediatric Dentistry and Orthodontic Studies, Faculty of Dentistry, Universiti Teknologi MARA Sungai Buloh Campus, Jalan Hospital, 47000 Sungai Buloh, Selangor, Malaysia
  • A Alias Department of Basic Sciences and Oral Biology, Faculty of Dentistry, Universiti Sains Islam Malaysia, 55100 Kuala Lumpur, Malaysia
  • SH Abdul Ghani Centre of Paediatric Dentistry and Orthodontic Studies, Faculty of Dentistry, Universiti Teknologi MARA Sungai Buloh Campus, Jalan Hospital, 47000 Sungai Buloh, Selangor, Malaysia
  • NH Norman Centre of Paediatric Dentistry and Orthodontic Studies, Faculty of Dentistry, Universiti Teknologi MARA Sungai Buloh Campus, Jalan Hospital, 47000 Sungai Buloh, Selangor, Malaysia

DOI:

https://doi.org/10.24191/cos.v9i2.19236

Keywords:

Class I, Bimaxillary Protrusion, Malocclusion, Geometric Morphometric Analysis (GMA)

Abstract

Objectives: This study aimed to determine the shape of dental inclination between Class I malocclusion and bimaxillary protrusive Malay patients using geometric morphometric analysis obtained from lateral cephalometric radiographs. Materials and Methods: 128 Malay patients who met the inclusion criteria were recruited; of which 64 patients were in Class I malocclusion and another 64 patients in bimaxillary protrusion groups. Samples were in the age range of 18 to 40 years old, with a gender distribution of 41 males and 87 females. Pre-treatment orthodontic lateral cephalometric radiograph were traced and digitized. Thirteen landmarks of each radiograph were incorporated and converted into coordinates using TPSUtil software. The plots were then exported to MorphoJ Software for multiple Geometric Morphometric Analysis (GMA). Results: The results showed that there was a statistically significant difference (p<0.01) in shape of dental inclination between the groups. Discriminant analysis and cross validation of these groups demonstrated 98% accuracy in identifying two types of dental malocclusion. The grid graphs illustrated the shape of dental inclination of the bimaxillary protrusion group as being significantly more proclined when compared to Class I malocclusion. Conclusion: This study concludes that the dissimilarities in dental inclination are identifiable in Class I malocclusion and bimaxillary protrusion and the shape differences can be visualized using geometric morphometric analysis. 

Downloads

Published

2022-09-01

How to Cite

Oon, S., Alias, A., Abdul Ghani, S., & Norman, N. (2022). Shape Visualization of Dental Inclination in Class I and Bimaxillary Protrusion Malocclusions through Geometric Morphometric Analysis. Compendium of Oral Science, 9(2), 80–87. https://doi.org/10.24191/cos.v9i2.19236

Issue

Vol. 9 No. 2 (2022): Compendium of Oral Science

Section

Original Article

License

Copyright (c) 2024 Compendium of Oral Science

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Materials contained in the journal may be reproduced for educational purposes provided that both the author(s) and the journal are appropriately recognised; otherwise duplication is not permitted. No articles, reports, or portions there of may be translated into other languages, published in books, journals, magazines, or any other print form without written permission from the authors and from the journal.

Disclaimer: The statements, opinions and data expressed in the articles and reports herein are those of the author(s) and not of the publisher and the editor(s). The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any schemes, methods, instructions or ideas referred to in the content.