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Updated: Jul 23, 2026
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Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Efficiency of noncompliance simultaneous first and second upper molar distalization: a three-dimensional tooth
Anestis Mavropoulos1, Andreas Karamouzos, Stavros Kiliaridis
1Department of Orthodontics, School of Dental Medicine, University of Geneva, Geneva, Switzerland.
The Angle Orthodontist
|August 16, 2005
Summary
Simultaneous distalization of maxillary molars effectively corrects Class II relationships. However, significant anchorage loss and patient-specific variations necessitate careful consideration in treatment planning.
Area of Science:
- Orthodontics
- Dentofacial Orthopedics
- Biomedical Engineering
Background:
- Class II molar relationships present a common orthodontic challenge.
- Maxillary molar distalization is a key strategy for correcting Class II malocclusions.
- Noncompliance appliances offer alternatives to traditional fixed appliances.
Purpose of the Study:
- To perform a three-dimensional (3D) analysis of tooth movements.
- To evaluate the efficacy of noncompliance simultaneous distalization of first and second maxillary molars.
- To assess anchorage loss and treatment variability.
Main Methods:
- Prospective study involving ten patients with bilateral Class II molar relationships.
- Treatment utilized a noncompliance, fixed intraoral appliance for molar distalization.
- Three-dimensional (3D) analysis of dental casts and lateral cephalometric radiographs.
Main Results:
- Average maxillary first molar distal movement was 2.8 mm.
- Anchorage loss observed as 1.9 mm proclination of central incisors.
- Significant patient-to-patient and intra-patient (right vs. left) variations in tooth movement.
Conclusions:
- Noncompliance simultaneous distalization is an efficient option for Class II correction.
- Anchorage loss and individual variability are critical factors to consider.
- Treatment outcomes may not be bilaterally symmetrical.
