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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

Articulator programmed according to the protrusive interocclusal record.
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Figure 2: Articulator programmed according to the protrusive interocclusal record.

Mentions: The Hanau wide Vue-II articulator has a condylar track of numerical scale with increments of 5°. In order to obtain the readings with accuracy up to 1, a protractor modified to have angulations from 0° to 60° was fixed to the condylar shaft (Figures 1 and 2). The center of the protractor was made to coincide with the center of the condylar shaft. Two pointers were attached on to the condylar track. One pointer was attached at the 0° mark on the outer rim of the condylar track. The 0°of the protractor was made to coincide with the 0°pointer while measuring the angle. The second pointer was attached to the groove in the inner rim of the condylar track which indicates the condylar guidance angle. If the pointer was at 0.5 or more decimals on the protractor, then the higher value was considered as the reading, and if the pointer was at <0.5 decimals then the lower value was considered as the reading.


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)

Articulator programmed according to the protrusive interocclusal record.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 2: Articulator programmed according to the protrusive interocclusal record.
Mentions: The Hanau wide Vue-II articulator has a condylar track of numerical scale with increments of 5°. In order to obtain the readings with accuracy up to 1, a protractor modified to have angulations from 0° to 60° was fixed to the condylar shaft (Figures 1 and 2). The center of the protractor was made to coincide with the center of the condylar shaft. Two pointers were attached on to the condylar track. One pointer was attached at the 0° mark on the outer rim of the condylar track. The 0°of the protractor was made to coincide with the 0°pointer while measuring the angle. The second pointer was attached to the groove in the inner rim of the condylar track which indicates the condylar guidance angle. If the pointer was at 0.5 or more decimals on the protractor, then the higher value was considered as the reading, and if the pointer was at <0.5 decimals then the lower value was considered as the reading.

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