Comparative analysis of sagittal condylar guidance by protrusive interocclusal records with panoramic and lateral cephalogram radiographs in dentulous population: A clinico-radiographic study

Abstract

Aim:To evaluate and compare the correlation between sagittal condylar guidance obtained by protrusive interocclusal records mounted on semi-adjustable articulator with panoramic and Lateral cephalogram radiograph tracings in dentulous population.Materials and Methods:One-hundred twenty dentulous subjects between age group of 20–40 years, free of signs and symptoms of any temporomandibular diseases were selected. The sagittal condylar guidance 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 Frankfurt's horizontal plane on radiograph to determine the radiographic angle of sagittal condylar guidance. The comparison of protrusive interocclusal records was done with the angles obtained by panoramic and lateral cephalogram radiograph tracings.Results:The mean difference between the condylar guidance values obtained using panoramic and lateral cephalogram radiographs was 0.13° and 0.67° on right side and 1.0° and 1.54° on left side with the radiographic values being higher. A Significant positive correlation was observed with P values 0.001 and 0.005 in left and right respectively.Conclusion:This study highlighted on the correlation between protrusive interocclusal records and the lateral cephalogram radiograph tracings which were more positively related than the panoramic radiograph. The values of lateral cephalogram radiograph tracings are closer as separate radiographs for left and right side were taken, causing the amount and quality of image distortion less. Lateral cephalogram radiograph may be taken as an important tool to rely on for recording the Sagittal condylar guidance angle.

A study on the accuracy of horizontal condylar guidance values in edentulous patients using preprosthetic diagnostic radiographs

“…(2016), where they found that panoramic radiographs showed a higher HCG value than that of lateral cephalogram. [24] This anomaly may be explained by the fact that these investigators had taken into account separately two lateral cephalograms of either side in dentulous population, while the present study attempted the tracings on lateral cephalograms which showed overlapping of the right and left sides as the sensor was present only in the right side. Reference measurement procedure based on unilateral image of lateral cephalogram may have directly affected on results in this study creating discrepancies with other two methods.…”

A clinico-radiographic study to compare and co-relate sagittal condylar guidance determined by intraoral gothic arch tracing method and panoramic radiograph in completely edentulous patients

“…Galagali et al . [11] also reported a correlation between the condylar guidance angles obtained by protrusive interocclusal records, panoramic radiograph, and the lateral cephalogram radiograph methods. They found that lateral cephalogram radiographs were more positively related than the panoramic radiograph, and the values of lateral cephalogram radiographs were closer to the interocclusal records on the articulator as separate radiographs for the left and right side were taken, making the amount and quality of image distortionless.…”

A Study to Check Correlation between Panoramic Radiographic Image and Protrusive Inter-Occlusal Record in Male and Female Dentulous Patients for Depicting Condylar Guidance Angle: A Pilot Study

“…The guidance inclination in semi-adjustable articulators is set either by individual protrusive or lateral inter-occlusal registrations. Varying inclinations have been reported with consecutive registrations, between operators, between recording materials, and between articulators [3].…”