Reliability of Submentovertex Projection in Assigning a Reference Cranial Midline for the Assessment of Condylar Asymmetry- A cross-sectional study
Journal Title: IP Indian Journal of Orthodontics and Dentofacial Research - Year 2017, Vol 3, Issue 2
Abstract
Introduction: The aim of the study was to compare the validity and reliability of two different methods for localization of the cranial midline through a cephalometric analysis of mandibular condylar asymmetry in a representative adult population. The hypothesis that the most reliable landmark for identifying transverse craniofacial asymmetry on SMV is spinosum foramina was tested. Materials and Method: This cross-sectional study was performed by analyzing the SMV radiograms of 70 patients. Two different cephalometric analyses were chosen to trace the basicranium midline. The first considers the craniostat ear rods as initial landmarks and the second analysis uses the spinosum foramina (SF) as main landmarks to identify the axis of symmetry. Quantification of the condylar asymmetry was performed using eight parameters and their symmetrical ratio (Symmetry ratio (SR) =Left parameter/Right parameter). Results: Statistical analysis of the results showed substantial equivalence and reliability of both tracing methods used. This reliability results from the fact that the left/right discrepancy for midline MP & MSP is not statistically significant. The extent of asymmetry falls within physiologic limit [2-3mm for left/right discrepancy from midsagittal plane is normal limit]. Conclusion: Submentovertex radiograms can provide assistance in diagnosing condylar asymmetries and planning the most appropriate treatment. The results of this study failed to validate our hypothesis indicating that the midline traced with spinosum foramina as landmark approximates the ideal midsagittal more closely. However another study with bigger sample size should be conducted before refuting or accepting this hypothesis.
Authors and Affiliations
Ashutosh Kumar Singh, Parita K. Chitroda, Nikhat M. Attar, Shashi Shanker Chaubey
Keywords
Related Articles
- EP ID EP304069
- DOI 10.18231/2455-6785.2017.0018
- Views 54
- Downloads 0
Clear aligner: invisalign: A review
Invisalign has given a more esthetic view to the orthodontic treatment Clear aligners is becoming more popular among younger population not only because it provides better esthetics but better periodontal status as well...
Overview of diagnostic tools in maxillary canine impaction
Permanent maxillary canines are the second most frequently impacted teeth. The prevalence of their impaction is 1-2% in the general population. This is most likely due to an extended development period and the long, tort...
Microbial colonisation on elastomeric modules during orthodontic treatment - an in vivo study
Purpose: The aim of this study was to determine the presence or absence of Streptococcus Mutans and Lactobacilli from the elastomeric modules and to study its extent at different intervals of time during orthodontic trea...
Awareness of orthodontic treatment need in young adults between 18-25 years
Introduction Health is defined by WHO as 39a state of complete physical mental and social wellbeing and not merely the absence of disease or infirmityObjectives There is a need to identify levels of awareness with respec...
Spatial changes in upper airway induced by change in head postures in horizontal, average and vertical growth pattern: A comparative lateral cephalometric study
Introduction The aim of the present study was to evaluate and compare the upper airway area on lateral cephalogram between vertical growth pattern and horizontal and average patterns The airway was measured in three diff...