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Correlation of Condylar Guidance Determined by Panoramic Radiographs to One Determined by Conventional Methods.

Godavarthi AS, Sajjan MC, Raju AV, Rajeshkumar P, Premalatha A, Chava N - J Int Oral Health (2015)

Bottom Line: Hanau articulator was modified to record the angulations to the accuracy of 1°.Readings were recorded and analyzed by Freidman's test and t-test.Condylar guidance values obtained by the interocclusal method and radiographic method in dentate individuals on the right side and left side 40.55°, and 37.1°, and 40.15°, and 34.75°, respectively.

View Article: PubMed Central - PubMed

Affiliation: Senior Lecturer, Department of Prosthodontics & Implantology, Gitam Dental College, Vishakapatnam, Andhra Pradesh, India.

ABSTRACT

Background: To evaluate the feasibility of using panoramic radiographs as an alternative to an interocclusal recording method for determining the condylar guidance in dentate and edentulous conditions.

Materials and methods: 20 dentulous individuals with an age range of 20-30 years and 20 edentulous patients of 40-65 years were selected. An interocclusal bite registration was done in protrusive position for all the subjects. Orthopantomographs were made for all patients in open mouth position. Hanau articulator was modified to record the angulations to the accuracy of 1°. Tracing of glenoid fossa on radiograph was done to measure the condylar guidance angles. Readings were recorded and analyzed by Freidman's test and t-test.

Results: Condylar guidance values obtained by the interocclusal method and radiographic method in dentate individuals on the right side and left side 40.55°, and 37.1°, and 40.15°, and 34.75°, respectively. In the edentulous individuals, the values on the right side and left side was 36.7° and 36.1° and 35.95° and 33.6,° respectively. The difference was statistically significant (P = < 0.001) in dentate group and was not statistically significant (P = 0.6493) in edentulous group.

Conclusion: Panoramic radiograph can be used as an alternative to interocclusal technique only in edentulous patients. Further studies comparing panoramic radiograph to jaw tracking devices would substantiate the results of this study.

No MeSH data available.


Related in: MedlinePlus

Tracing of condylar guidance angle on panoramic radiograph in dentate patients.
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Figure 3: Tracing of condylar guidance angle on panoramic radiograph in dentate patients.

Mentions: The panoramic radiographs obtained were traced on acetate sheets. The Frankfort’s plane was used as the reference plane for this study. The following salient points were identified and traced on the OPG (Figures 3 and 4). Frankfort’s plane was drawn from the Porion (plotted to coincide with the superior border of the radiolucent image of the external auditory meatus) to orbitale (the lower most point on the lower orbital rim. Outline of the glenoid fossa and articular eminence were marked. Point A depicting the deepest point in the glenoid fossa and point B the depicting the highest point on the articular eminence were marked. A line was drawn joining the points A and B. The angle formed by the line joining the points A and B to the line representing the Frankfort horizontal plane was measured and read as the horizontal condylar guidance angle value obtained by panoramic radiographs [Figures 3 and 4]). The above mentioned procedure was carried out in all the subjects. The readings were tabulated and subjected to statistical analysis


Correlation of Condylar Guidance Determined by Panoramic Radiographs to One Determined by Conventional Methods.

Godavarthi AS, Sajjan MC, Raju AV, Rajeshkumar P, Premalatha A, Chava N - J Int Oral Health (2015)

Tracing of condylar guidance angle on panoramic radiograph in dentate patients.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4588777&req=5

Figure 3: Tracing of condylar guidance angle on panoramic radiograph in dentate patients.
Mentions: The panoramic radiographs obtained were traced on acetate sheets. The Frankfort’s plane was used as the reference plane for this study. The following salient points were identified and traced on the OPG (Figures 3 and 4). Frankfort’s plane was drawn from the Porion (plotted to coincide with the superior border of the radiolucent image of the external auditory meatus) to orbitale (the lower most point on the lower orbital rim. Outline of the glenoid fossa and articular eminence were marked. Point A depicting the deepest point in the glenoid fossa and point B the depicting the highest point on the articular eminence were marked. A line was drawn joining the points A and B. The angle formed by the line joining the points A and B to the line representing the Frankfort horizontal plane was measured and read as the horizontal condylar guidance angle value obtained by panoramic radiographs [Figures 3 and 4]). The above mentioned procedure was carried out in all the subjects. The readings were tabulated and subjected to statistical analysis

Bottom Line: Hanau articulator was modified to record the angulations to the accuracy of 1°.Readings were recorded and analyzed by Freidman's test and t-test.Condylar guidance values obtained by the interocclusal method and radiographic method in dentate individuals on the right side and left side 40.55°, and 37.1°, and 40.15°, and 34.75°, respectively.

View Article: PubMed Central - PubMed

Affiliation: Senior Lecturer, Department of Prosthodontics & Implantology, Gitam Dental College, Vishakapatnam, Andhra Pradesh, India.

ABSTRACT

Background: To evaluate the feasibility of using panoramic radiographs as an alternative to an interocclusal recording method for determining the condylar guidance in dentate and edentulous conditions.

Materials and methods: 20 dentulous individuals with an age range of 20-30 years and 20 edentulous patients of 40-65 years were selected. An interocclusal bite registration was done in protrusive position for all the subjects. Orthopantomographs were made for all patients in open mouth position. Hanau articulator was modified to record the angulations to the accuracy of 1°. Tracing of glenoid fossa on radiograph was done to measure the condylar guidance angles. Readings were recorded and analyzed by Freidman's test and t-test.

Results: Condylar guidance values obtained by the interocclusal method and radiographic method in dentate individuals on the right side and left side 40.55°, and 37.1°, and 40.15°, and 34.75°, respectively. In the edentulous individuals, the values on the right side and left side was 36.7° and 36.1° and 35.95° and 33.6,° respectively. The difference was statistically significant (P = < 0.001) in dentate group and was not statistically significant (P = 0.6493) in edentulous group.

Conclusion: Panoramic radiograph can be used as an alternative to interocclusal technique only in edentulous patients. Further studies comparing panoramic radiograph to jaw tracking devices would substantiate the results of this study.

No MeSH data available.


Related in: MedlinePlus