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Updated: Jul 16, 2026
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Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
A comparative study of profile changes with 3 different distalization mechanics.
Korkmaz Sayinsu1, Fulya Isik, Ayşe Nur Ulgen
1Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey. drkorkmaz@yeditepe.edu.tr
World Journal of Orthodontics
|March 22, 2007
Summary
The intraoral bodily molar distalizer caused the most significant soft tissue profile changes, including lip protrusion and incisor proclination, compared to the Keles slider and acrylic cervical occipital appliance.
Area of Science:
- Orthodontics
- Dental Biomechanics
Background:
- Maxillary molar distalization is a key orthodontic procedure.
- Various appliances exist, each with potential skeletal and soft tissue effects.
Purpose of the Study:
- To compare skeletal and soft tissue changes from three molar distalization appliances: intraoral bodily molar distalizer, Keles slider, and acrylic cervical occipital appliance.
Main Methods:
- Retrospective analysis of lateral cephalometric films from 51 patients.
- Pre- and post-treatment cephalograms were digitized and measured using Dolphin Imaging 9.0.
Main Results:
- The intraoral bodily molar distalizer induced the greatest lip protrusion (E-plane) and maxillary incisor proclination (U1-SN angle).
- This appliance also caused the most significant vertical opening and increased the ANB angle, indicating sagittal skeletal changes.
- The acrylic cervical occipital appliance showed moderate effects, while the Keles slider resulted in milder profile changes.
Conclusions:
- The intraoral bodily molar distalizer yields the most pronounced soft tissue profile alterations.
- The acrylic cervical occipital appliance and Keles slider produce less dramatic profile modifications.
- Patient's initial soft tissue profile is a crucial factor when selecting a maxillary molar distalization appliance.
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