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Updated: Jul 7, 2026
07:32
Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Changes in horizontal jaw position and intraoral pressure
Jun-Ichi Takada1, Takashi Ono, Shigeki Takahashi
1Maxillofacial Orthognathics, Tokyo Medical and Dental University, Graduate School, Tokyo, Japan.
The Angle Orthodontist
|February 7, 2008
Summary
Lateral mandibular shifts alter tongue and cheek pressures, potentially explaining dental compensation and arch asymmetry in individuals with facial asymmetry. This study highlights the role of buccolingual pressure imbalances.
Area of Science:
- Biomedical Engineering
- Dental Science
- Orthodontics
Background:
- Facial asymmetry can lead to dental arch discrepancies.
- Buccolingual pressure imbalances may contribute to mandibular and dental compensation mechanisms.
Purpose of the Study:
- To investigate the effect of lateral mandibular shifts on buccolingual pressure.
- To explore the relationship between pressure imbalances and dental compensation in subjects with facial asymmetry.
Main Methods:
- Simultaneous measurement of buccolingual pressure on the mandibular first molar during experimental lateral mandibular shifts (rest position, right-shifted, left-shifted).
- Comparison of tongue and cheek pressures across different mandibular positions.
- Acquisition of T1-weighted magnetic resonance images in all tested positions.
Main Results:
- Tongue pressure decreased from left-shifted (LS) to rest position (RP) to right-shifted (RS) (LS > RP > RS).
- Cheek pressure increased from LS to RP to RS (LS < RP < RS).
- The tongue/cheek pressure ratio followed the order LS > RP > RS, with significant correlations between tongue displacement and pressure.
Conclusions:
- Lateral mandibular positioning induces buccolingual pressure imbalances.
- These pressure imbalances may be a contributing factor to molar dental compensation and dental arch asymmetry in individuals with facial asymmetry.
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