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A computed tomographic, mixed dentition, space analysis comparison
Australian Orthodontic Journal
|March 7, 2018
Summary
For accurate orthodontic treatment planning, Moyers' 50th percentile method for predicting unerupted canine and premolar widths showed the lowest error compared to other methods and cone beam computed tomography. This method is recommended for clinical use.
Area of Science:
- Dentistry
- Orthodontics
- Dental Imaging
Background:
- Accurate prediction of unerupted permanent canine and premolar widths is crucial for effective orthodontic space analysis.
- Miscalculations in predicting tooth size can lead to irreversible and inadequate treatment outcomes.
Purpose of the Study:
- To evaluate the agreement between Moyers' predictive tables (50th and 75th percentiles) and Tanaka-Johnston's equations for predicting unerupted tooth sums.
- To compare these predictions against measurements from cone beam computed tomography (CBCT), considered the gold standard.
Main Methods:
- The study included 26 children aged 8-13 years.
- Moyers' tables and Tanaka-Johnston's equations were used for prediction.
- Cone beam computed tomography (CBCT) was performed, and volumetric data were analyzed.
Main Results:
- All three predictive methods tended to overestimate CBCT measurements.
- The methods did not fully capture the variability in unerupted tooth sums.
- Moyers' 50th percentile showed a more balanced distribution of over- and underestimation.
Conclusions:
- Moyers' 50th percentile method demonstrated the lowest absolute error among the evaluated predictive techniques.
- This method is recommended for clinical application in orthodontic space analysis.
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