The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography
Aim: To assess the validity of using Jugale (J) and Antegonion (Ag) on Posterior-Anterior cephalograms (PAC) as landmarks for transverse intermaxillary analysis when compared with Cone Beam Computed Tomography (CBCT). Material and methods: Conventional PAC and CBCT images were taken of 28 dry skulls...
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| Format: | Journal Article |
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Australian Society of Orthodontics
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/32648 |
| _version_ | 1848753721126682624 |
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| author | Cheung, G. Goonewardene, M. Islam, Shams Murray, K. Koong, B. |
| author_facet | Cheung, G. Goonewardene, M. Islam, Shams Murray, K. Koong, B. |
| author_sort | Cheung, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Aim: To assess the validity of using Jugale (J) and Antegonion (Ag) on Posterior-Anterior cephalograms (PAC) as landmarks for transverse intermaxillary analysis when compared with Cone Beam Computed Tomography (CBCT). Material and methods: Conventional PAC and CBCT images were taken of 28 dry skulls. Craniometric measurements between the bilateral landmarks, Antegonion and Jugale, were obtained from the skulls using a microscribe and recorded as the base standard. The corresponding landmarks were identified and measured on CBCT and PAC and compared with the base standard measurements. The accuracy and reliability of the measurements were statistically evaluated and the validity was assessed by comparing the ability of the two image modalities to accurately diagnose an arbitrarily selected J-J/Ag-Ag ratio. All measurements were repeated at least 7 weeks apart. Intra-class correlations (ICC) and Bland-Altman plots were used to analyse the data. Results: All three methods were shown to be reliable as all had a mean error of less than 0.5 mm between repeated measurements. When compared with the base standard, CBCT measurements were shown to have higher agreement (ICC: 0.861-0.964) compared with measurements taken from PAC (ICC: 0.794-0.796). When the arbitrary J-J/Ag-Ag ratio was assessed, 18 per cent of cases were incorrectly diagnosed with a transverse discrepancy on the PAC compared with the CBCT which incorrectly diagnosed 8.7 per cent. Conclusion: CBCT was shown to be more reliable in assessing intermaxillary transverse discrepancy compared with PAC when using J-J/Ag-Ag ratios. |
| first_indexed | 2025-11-14T08:29:01Z |
| format | Journal Article |
| id | curtin-20.500.11937-32648 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:29:01Z |
| publishDate | 2013 |
| publisher | Australian Society of Orthodontics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-326482017-03-08T13:31:55Z The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography Cheung, G. Goonewardene, M. Islam, Shams Murray, K. Koong, B. validity posterior anterior orthodontics cephalometry transverse discrepancy cone beam computed tomography Aim: To assess the validity of using Jugale (J) and Antegonion (Ag) on Posterior-Anterior cephalograms (PAC) as landmarks for transverse intermaxillary analysis when compared with Cone Beam Computed Tomography (CBCT). Material and methods: Conventional PAC and CBCT images were taken of 28 dry skulls. Craniometric measurements between the bilateral landmarks, Antegonion and Jugale, were obtained from the skulls using a microscribe and recorded as the base standard. The corresponding landmarks were identified and measured on CBCT and PAC and compared with the base standard measurements. The accuracy and reliability of the measurements were statistically evaluated and the validity was assessed by comparing the ability of the two image modalities to accurately diagnose an arbitrarily selected J-J/Ag-Ag ratio. All measurements were repeated at least 7 weeks apart. Intra-class correlations (ICC) and Bland-Altman plots were used to analyse the data. Results: All three methods were shown to be reliable as all had a mean error of less than 0.5 mm between repeated measurements. When compared with the base standard, CBCT measurements were shown to have higher agreement (ICC: 0.861-0.964) compared with measurements taken from PAC (ICC: 0.794-0.796). When the arbitrary J-J/Ag-Ag ratio was assessed, 18 per cent of cases were incorrectly diagnosed with a transverse discrepancy on the PAC compared with the CBCT which incorrectly diagnosed 8.7 per cent. Conclusion: CBCT was shown to be more reliable in assessing intermaxillary transverse discrepancy compared with PAC when using J-J/Ag-Ag ratios. 2013 Journal Article http://hdl.handle.net/20.500.11937/32648 Australian Society of Orthodontics restricted |
| spellingShingle | validity posterior anterior orthodontics cephalometry transverse discrepancy cone beam computed tomography Cheung, G. Goonewardene, M. Islam, Shams Murray, K. Koong, B. The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography |
| title | The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography |
| title_full | The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography |
| title_fullStr | The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography |
| title_full_unstemmed | The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography |
| title_short | The validity of transverse intermaxillary analysis on traditional PA cephalometry compared to cone-beam computed tomography |
| title_sort | validity of transverse intermaxillary analysis on traditional pa cephalometry compared to cone-beam computed tomography |
| topic | validity posterior anterior orthodontics cephalometry transverse discrepancy cone beam computed tomography |
| url | http://hdl.handle.net/20.500.11937/32648 |