Correlation Between the Curve of Spee and Vertical Divergence in Skeletal Class III Patients
Abstract
Objective: The purpose of this retrospective study was to determine if there is a correlation between the depth of the Curve of Spee (COS) and the mandibular plane angle in individuals with a Class III skeletal relationship. Materials and Methods: A patient population of 60 Class III skeletal patients was divided into three groups of 20 based on skeletal divergence (Hypodivergent, Normodivergent, Hyperdivergent). For each patient a cephalometric radiograph was traced, and initial intra-oral models were digitized and measured for depth of COS. All measurements were compiled and a statistical analysis consisting of a one-way ANOVA and Pierson Correlation analysis were completed to determine the correlation between the COS and all cephalometric measurements including mandibular plane angle. Results: The COS was deepest in the normodivergent group (2.09mm) followed by the hypodivergent group (1.63mm) and the hyperdivergent group had the shallowest COS (1.33mm). One-way ANOVA and Tukey's post hoc tests indicated the COS in the hyperdivergent group was significantly smaller than the normodivergent group (p=0.024), however the difference was not correlated based on the Pierson Correlation analysis. When all measurements were combined, Pierson Correlation revealed a positive correlation between COS and overbite (p=.0018). Conclusion: There is no correlation between depth of COS and skeletal divergence in Class III skeletal patients. There is a correlation between depth of COS and overbite in skeletal Class III patients in that a deep COS corresponded to a deeper overbite.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 13, 2023
- Accession Number
- AD1222320
Entities
People
- David C. Brockbank
Organizations
- Uniformed Services University of the Health Sciences