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Predictive Equation for Construction of Anatomic Porion with Machine Porion as Reference Point.
Kamath Apoorva Shrinivas1, Shetty Suhani Sudhakar2, Greeshma Kannan1
1Department of Orthodontics, Srinivas Institute of Dental Sciences, Mangaluru, Karnataka, India.
The Journal of Contemporary Dental Practice
|July 20, 2023
Summary
This study establishes a link between the machine porion (PoM) and anatomic porion (PoA), enabling reliable PoA construction using the easily reproducible PoM. This method aids in overcoming limitations associated with traditional porion identification in cephalometric analysis.
Area of Science:
- Cephalometric Analysis
- Orthodontic Imaging
Background:
- The accurate identification of landmarks in cephalometric analysis is crucial for diagnosis and treatment planning.
- Anatomic porion (PoA) and machine porion (PoM) are key landmarks, but PoA can be difficult to reliably locate.
Purpose of the Study:
- To investigate the relationship between the anatomic porion (PoA) and machine porion (PoM).
- To develop a method for constructing the more reliable PoA using the easily reproducible PoM.
Main Methods:
- Analysis of approximately 200 pretreatment lateral cephalograms.
- Measurement of perpendicular distances of PoA and PoM from the Sella-Nasion (SN) plane and SN perpendicular plane.
- Statistical analysis to derive a predictive equation for constructing PoA and PoM.
Main Results:
- Distances of PoA from SN and SN perpendicular planes were recorded.
- Distances of PoM from SN and SN perpendicular planes were recorded.
- Significant differences and sexual dimorphism were observed between PoA and PoM measurements.
Conclusions:
- A significant relationship exists between PoM and PoA.
- PoA can be reliably constructed using PoM, leveraging PoM's ease of reproducibility.
- This approach offers a practical solution to overcome the limitations of traditional porion identification.
