Estimation of occlusal vertical dimension using cephalometric angular reconstruction
Aim: To propose a new technique, based on cephalometrics for determining the vertical dimension of occlusion (VDO). Methods and Material: Thirty-five participants in the age range of 20–22 years who met the inclusion criteria were recruited. Lateral cephalograms were obtained and tracing done. Five...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2021-01-01
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| Series: | Indian Journal of Dental Research |
| Subjects: | |
| Online Access: | http://www.ijdr.in/article.asp?issn=0970-9290;year=2021;volume=32;issue=1;spage=31;epage=34;aulast=Vinnakota |
| _version_ | 1818455152067084288 |
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| author | Dileep Nag Vinnakota Rekhalakshmi Kamatham |
| author_facet | Dileep Nag Vinnakota Rekhalakshmi Kamatham |
| author_sort | Dileep Nag Vinnakota |
| collection | DOAJ |
| description | Aim: To propose a new technique, based on cephalometrics for determining the vertical dimension of occlusion (VDO). Methods and Material: Thirty-five participants in the age range of 20–22 years who met the inclusion criteria were recruited. Lateral cephalograms were obtained and tracing done. Five reference landmarks, Nasion (N), Anterior Nasal Spine (ANS), Porion (P), Gonion (G) and Gnathion (Gn) were marked and joined to form four angles, N-ANS-Gn, N-ANS-G, P-G-Gn and P-G-ANS; distance between ANS and Gn was considered as VDO in cephalogram (VDO-Ceph). The angles N-ANS-Gn and N-ANS-G; P-G-Gn, and P-G-ANS were correlated; two simple linear regression models were developed to predict N-ANS-Gn and P-G-Gn, using N-ANS-G and P-G-ANS, as independent variables. Using the formulae, the predicted angles, N-ANS-Gn and P-G-Gn were drawn and intersection marked as 'reconstructed point Gn'. The predicted VDO-Ceph values (distance between ANS and reconstructed Gn) were measured and correlated with actual values. Results: The angles N-ANS-Gn and P-G-Gn had a statistically significant positive correlation with N-ANS-G (r = 0.77, P < 0.001) and P-G-ANS (r = 0.83, P < 0.001), respectively. Using simple linear regression analysis, the following formulae were obtained: N-ANS-Gn (in degrees) = 1.271 N-ANS-G (in degrees) + 24.83 and P-G-Gn (in degrees) = 0.987 P-G-ANS (in degrees) + 35.93. The predicted and actual VDO-Ceph values showed no statistical significance difference (P = 0.92). Conclusion: By tracing four cephalometric landmarks, N, ANS, P, G; and using the angular reconstruction, it is possible to predict the location of Gn. Hence, during prosthetic replacement of lost teeth, this can be employed for the estimation of lost dimensions. |
| first_indexed | 2024-12-14T22:06:14Z |
| format | Article |
| id | doaj.art-0b3d05ce2953445b9c2580a7f389fed1 |
| institution | Directory Open Access Journal |
| issn | 0970-9290 1998-3603 |
| language | English |
| last_indexed | 2024-12-14T22:06:14Z |
| publishDate | 2021-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Indian Journal of Dental Research |
| spelling | doaj.art-0b3d05ce2953445b9c2580a7f389fed12022-12-21T22:45:52ZengWolters Kluwer Medknow PublicationsIndian Journal of Dental Research0970-92901998-36032021-01-01321313410.4103/ijdr.IJDR_783_18Estimation of occlusal vertical dimension using cephalometric angular reconstructionDileep Nag VinnakotaRekhalakshmi KamathamAim: To propose a new technique, based on cephalometrics for determining the vertical dimension of occlusion (VDO). Methods and Material: Thirty-five participants in the age range of 20–22 years who met the inclusion criteria were recruited. Lateral cephalograms were obtained and tracing done. Five reference landmarks, Nasion (N), Anterior Nasal Spine (ANS), Porion (P), Gonion (G) and Gnathion (Gn) were marked and joined to form four angles, N-ANS-Gn, N-ANS-G, P-G-Gn and P-G-ANS; distance between ANS and Gn was considered as VDO in cephalogram (VDO-Ceph). The angles N-ANS-Gn and N-ANS-G; P-G-Gn, and P-G-ANS were correlated; two simple linear regression models were developed to predict N-ANS-Gn and P-G-Gn, using N-ANS-G and P-G-ANS, as independent variables. Using the formulae, the predicted angles, N-ANS-Gn and P-G-Gn were drawn and intersection marked as 'reconstructed point Gn'. The predicted VDO-Ceph values (distance between ANS and reconstructed Gn) were measured and correlated with actual values. Results: The angles N-ANS-Gn and P-G-Gn had a statistically significant positive correlation with N-ANS-G (r = 0.77, P < 0.001) and P-G-ANS (r = 0.83, P < 0.001), respectively. Using simple linear regression analysis, the following formulae were obtained: N-ANS-Gn (in degrees) = 1.271 N-ANS-G (in degrees) + 24.83 and P-G-Gn (in degrees) = 0.987 P-G-ANS (in degrees) + 35.93. The predicted and actual VDO-Ceph values showed no statistical significance difference (P = 0.92). Conclusion: By tracing four cephalometric landmarks, N, ANS, P, G; and using the angular reconstruction, it is possible to predict the location of Gn. Hence, during prosthetic replacement of lost teeth, this can be employed for the estimation of lost dimensions.http://www.ijdr.in/article.asp?issn=0970-9290;year=2021;volume=32;issue=1;spage=31;epage=34;aulast=Vinnakotacephalometricsocclusionvertical dimension |
| spellingShingle | Dileep Nag Vinnakota Rekhalakshmi Kamatham Estimation of occlusal vertical dimension using cephalometric angular reconstruction Indian Journal of Dental Research cephalometrics occlusion vertical dimension |
| title | Estimation of occlusal vertical dimension using cephalometric angular reconstruction |
| title_full | Estimation of occlusal vertical dimension using cephalometric angular reconstruction |
| title_fullStr | Estimation of occlusal vertical dimension using cephalometric angular reconstruction |
| title_full_unstemmed | Estimation of occlusal vertical dimension using cephalometric angular reconstruction |
| title_short | Estimation of occlusal vertical dimension using cephalometric angular reconstruction |
| title_sort | estimation of occlusal vertical dimension using cephalometric angular reconstruction |
| topic | cephalometrics occlusion vertical dimension |
| url | http://www.ijdr.in/article.asp?issn=0970-9290;year=2021;volume=32;issue=1;spage=31;epage=34;aulast=Vinnakota |
| work_keys_str_mv | AT dileepnagvinnakota estimationofocclusalverticaldimensionusingcephalometricangularreconstruction AT rekhalakshmikamatham estimationofocclusalverticaldimensionusingcephalometricangularreconstruction |