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A new approach determining the sagittal interjaw relationship: the bisecting plane analysis
1Faculty of Dentistry, National Yang-Ming University, Taipei, Taiwan, R.O.C.
Zhonghua Yi Xue Za Zhi = Chinese Medical Journal; Free China Ed
|December 1, 1995
Summary
A new bisecting plane (BSP) method offers a more accurate assessment of sagittal interjaw relationships compared to the functional occlusal plane (FOP). This improved method aids in critical orthopedic jaw assessments.
Area of Science:
- Orthodontics
- Dental Morphology
- Biometrics
Background:
- Traditional assessment of sagittal interjaw relationships relies on external reference lines or dental determinants.
- Existing methods lack precision in evaluating orthopedic sagittal interjaw relationships.
Purpose of the Study:
- To introduce and evaluate a novel bisecting plane (BSP) method for assessing orthopedic sagittal interjaw relationships.
- To compare the accuracy of the BSP method against the functional occlusal plane (FOP).
Main Methods:
- A sample of 110 individuals was analyzed.
- The bisecting plane (BSP) and functional occlusal plane (FOP) methods were compared.
- Clinical comprehensive classification (CCC) served as the gold standard for accuracy assessment.
Main Results:
- The bisecting plane (BSP) method demonstrated superior accuracy in assessing sagittal interjaw relationships over the FOP method.
- The BSP method achieved a higher kappa value (0.659) compared to the FOP method (0.477) when validated against CCC.
- These results indicate a statistically significant improvement in assessment accuracy with the BSP method.
Conclusions:
- The bisecting plane (BS) serves as a viable alternative reference plane for evaluating skeletal sagittal interjaw relationships.
- The BSP method's concordance with clinical evaluations makes it a valuable tool for critical orthopedic assessments, particularly in cases involving jaw rotation.