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Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
[The effect of maxillary protraction in early permanent dentition]
Lin-Ling Chen1, Yi-Ming Yang, Guo-Ping Ji
1Department of Orthodontics, College of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China. chenlinling100@yahoo.com.cn
Shanghai Kou Qiang Yi Xue = Shanghai Journal of Stomatology
|March 25, 2008
Summary
Maxillary protraction effectively advances the upper jaw and modifies lower jaw growth in children with anterior crossbite. This orthopedic treatment is beneficial during early permanent dentition for optimal skeletal correction.
Area of Science:
- Orthodontics
- Craniofacial Orthopedics
- Pediatric Dentistry
Background:
- Skeletal anterior crossbite can lead to facial asymmetry and occlusal problems.
- Early intervention is crucial for effective orthopedic correction in growing patients.
- Maxillary retrusion and mandibular protrusion are common skeletal patterns in these patients.
Purpose of the Study:
- To assess the efficacy of maxillary protraction in correcting skeletal anterior crossbite.
- To determine the optimal timing for initiating orthopedic treatment for this condition.
- To evaluate the effects on maxillary and mandibular growth patterns.
Main Methods:
- A cohort of 18 patients (mean age 11.5 years) with skeletal anterior crossbite and concave profiles were treated with protraction headgear.
- Lateral cephalograms were obtained before and after treatment for cephalometric analysis.
- Statistical analysis was performed to evaluate changes in linear and angular measurements.
Main Results:
- Maxillary protraction significantly increased SNA angle and protruded the A point.
- Treatment resulted in a decrease in SNB angle and inhibited mandibular protrusion (Pg point).
- A combination of skeletal (57.43%) and dental (42.57%) changes contributed to the overall maxillary incisor advancement.
Conclusions:
- Maxillary protraction is an effective orthopedic treatment for skeletal anterior crossbite in early permanent dentition.
- The treatment promotes maxillary growth and alters mandibular growth direction.
- Early intervention with maxillary protraction can significantly improve facial skeletal relationships.
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