Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research study
Statement of Problem: The accuracy and reliability of the methods used for programming the semi-adjustable articulators determine the accuracy in occlusion. The current recommended average settings using the Hanau's formula commonly used by clinicians is questionable, and thus reassessment is n...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2015-01-01
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| Series: | The Journal of Indian Prosthodontic Society |
| Subjects: | |
| Online Access: | http://www.j-ips.org/article.asp?issn=0972-4052;year=2015;volume=15;issue=4;spage=326;epage=330;aulast=Bhawsar |
| _version_ | 1819072529467179008 |
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| author | Sanjay Vasant Bhawsar Ashlesha Subhash Marathe Sadekh Abdul Ansari |
| author_facet | Sanjay Vasant Bhawsar Ashlesha Subhash Marathe Sadekh Abdul Ansari |
| author_sort | Sanjay Vasant Bhawsar |
| collection | DOAJ |
| description | Statement of Problem: The accuracy and reliability of the methods used for programming the semi-adjustable articulators determine the accuracy in occlusion. The current recommended average settings using the Hanau's formula commonly used by clinicians is questionable, and thus reassessment is needed. This study was carried out to evaluate and compare the lateral condylar guidance: (1) Using the Hanau's formula and the computerized jaw tracking device (Kinesiograph). (2) On the right and left sides using both these methods.
Materials and Methods: A total of 20 completely edentulous patients (14 male and 6 females) within 40–60 years of age were selected. Jaw relation was recorded followed by face bow transfer. Extraoral Gothic arch tracing was recorded; three protrusive records were obtained and condylar guidance was calculated. Lateral condylar guidance was then calculated using Hanau's formula, followed by the computerized jaw tracking device. A comparative evaluation was done of the obtained values. The same investigator worked with each of the study participants for the purpose of standardization.
Results: The lateral condylar guidance values obtained using the Hanau's formula ranged from 14 to 17° while those obtained using the computerized K7 jaw tracking device ranged from 8 to 40°. Bennett angle values, obtained using the jaw tracking device and Hanau's formula showed statistically significant differences (P < 0.05) using paired t-test (at 95% confidence interval). Bennett angle values of the right and left sides found using the Hanau's formula were almost similar. Difference in the Bennett angle values of the right and left sides were found using the jaw tracking device. However, this difference was not statistically significant (P > 0.05).
Conclusion: Based on the results, dentist and dental technicians should consider reassessing the current recommended average settings and use of the Hanau's formula for programming the semi-adjustable articulators. |
| first_indexed | 2024-12-21T17:39:11Z |
| format | Article |
| id | doaj.art-2a472eb342d14111bb86c2be38cbbbd1 |
| institution | Directory Open Access Journal |
| issn | 0972-4052 1998-4057 |
| language | English |
| last_indexed | 2024-12-21T17:39:11Z |
| publishDate | 2015-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | The Journal of Indian Prosthodontic Society |
| spelling | doaj.art-2a472eb342d14111bb86c2be38cbbbd12022-12-21T18:55:40ZengWolters Kluwer Medknow PublicationsThe Journal of Indian Prosthodontic Society0972-40521998-40572015-01-0115432633010.4103/0972-4052.161566Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research studySanjay Vasant BhawsarAshlesha Subhash MaratheSadekh Abdul AnsariStatement of Problem: The accuracy and reliability of the methods used for programming the semi-adjustable articulators determine the accuracy in occlusion. The current recommended average settings using the Hanau's formula commonly used by clinicians is questionable, and thus reassessment is needed. This study was carried out to evaluate and compare the lateral condylar guidance: (1) Using the Hanau's formula and the computerized jaw tracking device (Kinesiograph). (2) On the right and left sides using both these methods. Materials and Methods: A total of 20 completely edentulous patients (14 male and 6 females) within 40–60 years of age were selected. Jaw relation was recorded followed by face bow transfer. Extraoral Gothic arch tracing was recorded; three protrusive records were obtained and condylar guidance was calculated. Lateral condylar guidance was then calculated using Hanau's formula, followed by the computerized jaw tracking device. A comparative evaluation was done of the obtained values. The same investigator worked with each of the study participants for the purpose of standardization. Results: The lateral condylar guidance values obtained using the Hanau's formula ranged from 14 to 17° while those obtained using the computerized K7 jaw tracking device ranged from 8 to 40°. Bennett angle values, obtained using the jaw tracking device and Hanau's formula showed statistically significant differences (P < 0.05) using paired t-test (at 95% confidence interval). Bennett angle values of the right and left sides found using the Hanau's formula were almost similar. Difference in the Bennett angle values of the right and left sides were found using the jaw tracking device. However, this difference was not statistically significant (P > 0.05). Conclusion: Based on the results, dentist and dental technicians should consider reassessing the current recommended average settings and use of the Hanau's formula for programming the semi-adjustable articulators.http://www.j-ips.org/article.asp?issn=0972-4052;year=2015;volume=15;issue=4;spage=326;epage=330;aulast=BhawsarArticulatorcondylar guidancetemporomandibular joint |
| spellingShingle | Sanjay Vasant Bhawsar Ashlesha Subhash Marathe Sadekh Abdul Ansari Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research study The Journal of Indian Prosthodontic Society Articulator condylar guidance temporomandibular joint |
| title | Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research study |
| title_full | Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research study |
| title_fullStr | Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research study |
| title_full_unstemmed | Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research study |
| title_short | Evaluation of Hanau's formula in determination of lateral condylar guidance: A clinical research study |
| title_sort | evaluation of hanau s formula in determination of lateral condylar guidance a clinical research study |
| topic | Articulator condylar guidance temporomandibular joint |
| url | http://www.j-ips.org/article.asp?issn=0972-4052;year=2015;volume=15;issue=4;spage=326;epage=330;aulast=Bhawsar |
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