Related Experiment Video
Updated: Jul 16, 2026
07:16
Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
Published on: October 20, 2023
Arch width changes with a rapid maxillary expansion appliance anchored to the primary teeth
Mauro Cozzani1, Antonio Guiducci, Stefano Mirenghi
1Department of Orthodontics, University of Ferrara, Italy. maurocozzani@libero.it
The Angle Orthodontist
|February 27, 2007
Summary
Rapid maxillary expansion (RME) using primary teeth anchorage effectively corrects posterior crossbites in the transitional dentition. This transverse correction is stable long-term, with no undesirable effects on permanent molars.
Area of Science:
- Orthodontics
- Pediatric Dentistry
- Craniofacial Development
Background:
- Posterior crossbites are common in the transitional dentition.
- Traditional rapid maxillary expansion (RME) anchorage can lead to undesirable effects.
- Primary teeth offer a potential alternative anchorage for RME.
Purpose of the Study:
- To evaluate dimensional changes following RME anchored to primary teeth.
- To assess the stability of transverse correction achieved with this method.
Main Methods:
- A Haas-type RME appliance was used in 31 transitional dentition patients, anchored to primary molars and canines.
- Study models were analyzed before RME, at appliance removal, and at least 1 year post-treatment.
- A control group of 60 untreated individuals was used for comparison.
Main Results:
- Permanent molar crossbites were corrected and maintained at follow-up.
- Maxillary intermolar width significantly increased post-RME and remained stable.
- Premolar and canine widths showed slight increases compared to controls.
Conclusions:
- RME anchored to primary teeth provides stable transverse correction.
- This technique avoids undesirable treatment-induced effects on maxillary permanent molars.
Related Concept Videos
01:15Teeth
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
01:21Tooth Anatomy
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
01:19Expansion and Contraction in Masonry Walls
Masonry walls are subject to slight expansion and contraction due to variations in temperature and moisture. Thermal movement in masonry is relatively straightforward to measure and plan for. On the other hand, moisture movement poses more of a challenge. New clay masonry units typically absorb water and expand over time under normal environmental conditions. Conversely, new concrete masonry units tend to shrink as they lose the excess moisture acquired during their production process.
To...
To...