Correlation between Curve of Spee and Vertical Divergence in Skeletal Class Patients
Abstract
Objective: The purpose of this study was to build off separate findings from previous studies; specifically that the COS is deeper in Class II skeletal malocclusions or in hypodivergent skeletal patterns. The hypothesis is hypodivergent skeletal patterns will exhibit a greater COS and there is a correlation between the mandibular plane angle and the depth of the COS in Class II patients. Materials and Methods: This was a retrospective study. 60 total Class II patients were divided into 3 equal groups based on their vertical skeletal divergence (hypodivergent, normodivergent, and hyperdivergent). From this population, measurements were recorded from their reconstructed lateral cephalograms and pre-treatment study models. The data was aggregated and analyzed with Pearson Correlation Coefficient, one-way ANOVA, and descriptive statistics. Results: The COS average was deepest in hypodivergent patients (2.43mm), and shallowest in hyperdivergent (2.05mm), however the differences, calculated by One-way ANOVA, were not significant (P greater than 0.05). The correlation analysis found that when looking at COS to all the variables aggregated, there was a small negative correlation to L1-NB (p less than 0.05), and a large positive correlation to both overbite and overjet (P=0). Conclusion: The COS was not correlated to the mandibular plane angle in skeletal Class II patients. Secondly, the COS was positively correlated to both overjet and overbite; as both overbite and overjet increased, the COS also increased. Finally, the COS was negatively correlated to L1-NB; the more retrusive the lower incisors, the deeper the COS.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 2022
- Accession Number
- AD1186195
Entities
People
- Barrington W. Dykes
- Jeremy F. Scarpate
Organizations
- Uniformed Services University of the Health Sciences