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

View Article: PubMed Central - PubMed

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.

No MeSH data available.


Lateral cephalogram radiograph of the subject showing the tracing of the angle of sagittal condylar guidance. Yellow line: Frankfurt horizontal plane Blue line: Sagittal condylar path inclination
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Figure 4: Lateral cephalogram radiograph of the subject showing the tracing of the angle of sagittal condylar guidance. Yellow line: Frankfurt horizontal plane Blue line: Sagittal condylar path inclination

Mentions: Panoramic radiographs [Figure 3] and right and left lateral cephalogram radiographs [Figure 4] of last 6 months were obtained from the Department of Oral Medicine and Radiology. These radiographs are made for the patients’ who have visited for different treatment like Single tooth Implant in any of the posterior quadrant or for surgical removal of impacted teeth. The radiograph of each patient was made with personal protection barrier with the Frankfurt horizontal plane parallel to the floor of the mouth. All radiographs were made by the same panoramic radiographic unit. The images were acquired at 74 kVp and 10 mA. Two radio-opaque lines are consistently apparent on the radiographs in the region of the temporal bone. One depicts the outline of the articular eminence and fossa, the second, the inferior border of the zygomatic arch. Tracings of the radiographic images were made on a transparent sheet. A horizontal reference line was marked by joining the orbitale and porion. The most superior and the most inferior points of the curvatures were identified. These two lines were connected by a straight line representing the mean curvature line. Condylar Guidance angles made by the intersection of the mean curvature line and the horizontal reference line traced were measured [Figure 5].


Comparative analysis of sagittal condylar guidance by protrusive interocclusal records with panoramic and lateral cephalogram radiographs in dentulous population: A clinico-radiographic study
Lateral cephalogram radiograph of the subject showing the tracing of the angle of sagittal condylar guidance. Yellow line: Frankfurt horizontal plane Blue line: Sagittal condylar path inclination
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4837772&req=5

Figure 4: Lateral cephalogram radiograph of the subject showing the tracing of the angle of sagittal condylar guidance. Yellow line: Frankfurt horizontal plane Blue line: Sagittal condylar path inclination
Mentions: Panoramic radiographs [Figure 3] and right and left lateral cephalogram radiographs [Figure 4] of last 6 months were obtained from the Department of Oral Medicine and Radiology. These radiographs are made for the patients’ who have visited for different treatment like Single tooth Implant in any of the posterior quadrant or for surgical removal of impacted teeth. The radiograph of each patient was made with personal protection barrier with the Frankfurt horizontal plane parallel to the floor of the mouth. All radiographs were made by the same panoramic radiographic unit. The images were acquired at 74 kVp and 10 mA. Two radio-opaque lines are consistently apparent on the radiographs in the region of the temporal bone. One depicts the outline of the articular eminence and fossa, the second, the inferior border of the zygomatic arch. Tracings of the radiographic images were made on a transparent sheet. A horizontal reference line was marked by joining the orbitale and porion. The most superior and the most inferior points of the curvatures were identified. These two lines were connected by a straight line representing the mean curvature line. Condylar Guidance angles made by the intersection of the mean curvature line and the horizontal reference line traced were measured [Figure 5].

View Article: PubMed Central - PubMed

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.

No MeSH data available.