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Updated: Jun 2, 2026
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Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Comparative study between 2 methods of mounting models in semiadjustable articulator for orthognathic surgery
Gabriela Mayrink1, Renato Sawazaki, Luciana Asprino
1Department Oral and Maxillofacial Surgery, Piracicaba Dental School, Piracicaba, Brazil. gabrielamayrink@fop.unicamp.br
Summary
The Occlusal Plane Indicator (OPI) platform and traditional face-bow transfer methods show similar accuracy for mounting dental casts. Further research is needed to refine these techniques for optimal clinical application.
Area of Science:
- Dental Occlusion
- Orthodontic Technology
Background:
- Accurate mounting of dental casts is crucial for diagnosing and treating malocclusions.
- Traditional face-bow transfers are standard but can be technique-sensitive.
- Newer methods, like the Occlusal Plane Indicator (OPI) platform, aim to simplify and improve cast mounting accuracy.
Purpose of the Study:
- To compare the accuracy of a traditional face-bow transfer method with the Occlusal Plane Indicator (OPI) platform for mounting dental casts.
- To analyze the inclination of the maxillary occlusal plane relative to the Frankfort Horizontal Plane (FHP) using both methods.
Main Methods:
- Two dental casts from 10 patients were mounted: one using a traditional face-bow transfer and a semiadjustable articulator, the other using the OPI platform with a SAM articulator.
- Accuracy was assessed by comparing the angle between the occlusal plane and FHP on cephalograms with the angle on the articulator.
- Statistical analysis using a 1-way ANOVA was performed on the collected measurements.
Main Results:
- Measurements were tabulated and analyzed statistically.
- No statistically significant differences were found between the accuracy of the OPI platform and the traditional face-bow transfer method.
Conclusions:
- Both the OPI platform and traditional face-bow transfer methods yield comparable results in mounting dental casts.
- Further studies are recommended to validate the accuracy of the OPI platform, particularly concerning maxillary cant, and to develop improved techniques addressing the limitations of each method.
