Correlation of Condylar Guidance, Labio-Lingual Inclination Of The Upper Central Incisors, Incisal Guidance And Y-Axis Between Different Classifications Of Skeletal Malocclusion In Antero-Posterior Plane: A Clinical And Radiographic Study.
Journal Title: International Journal of Dental Science and Innovative Research (IJDSIR) - Year 2019, Vol 2, Issue 3
Abstract
Aim: To evaluate and compare the correlation between condylar guidance angle (CGA) obtained by protrusive interocclusal records mounted on semi-adjustable articulator with panoramic and lateral cephalogram radiograph tracings and anterior guidance angle, axial inclination of maxillary central incisor and Y- axis angle obtained by lateral cephalogram radiograph tracings in dentulous population. Materials and methods: Forty five dentulous subjects between age group of 14–22 years, free of signs and symptoms of any temporomandibular disorders and facial asymmetry were selected. The condylar guidance angle was determined by protrusive interocclusal records and transferred to a semi-adjustable articulator through a face bow. The condylar guidance angles obtained were tabulated. The sagittal outline of the articular eminence and glenoid fossa were traced on panoramic and lateral cephalogram radiographs. The sagittal condylar path inclination was constructed. This was related to the S-N plane on radiograph to determine the radiographic condylar guidance angle. The comparison of protrusive interocclusal records was done with the angles obtained by panoramic and lateral cephalogram radiograph tracings. Statistical analysis: The correlation between different skeletal sagittal malocclusions with Incisal inclination incisal guidance, condylar guidance & growth axis will be done using Pearson’s correlation. The four groups were compared for differences using one-way analysis of variance (ANOVA). Post-hoc individual comparisons are done using LSD ( Least Significant Difference) method. All analyses was done at alpha 0.05 (95% C.L.). Result: A significant difference in the CGA of three skeletal relationships was seen, with Class II having a steeper angle than the other two. Among the various methods used, a correlation was found between the clinical and the protrusive method.
Authors and Affiliations
Dr. Amrita Sonawane
Keywords
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