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Cephalometric changes during self-correction of primary anterior crossbite.
S Nakamura1, K Miyajima, K Nagahara
1School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
ASDC Journal of Dentistry for Children
|September 7, 1999
Summary
Favorable maxillary and mandibular growth can lead to self-correction of anterior crossbite in children. However, a larger mandible relative to the cranial base may prevent self-correction of this common dental issue.
Area of Science:
- Dentistry
- Orthodontics
- Pediatric Dentistry
Background:
- Anterior crossbite is a common malocclusion in early childhood.
- Understanding growth patterns is crucial for predicting crossbite self-correction.
- Longitudinal cephalometric studies provide insights into skeletal and dental development.
Purpose of the Study:
- To investigate longitudinal cephalometric growth changes in Japanese girls with anterior crossbite.
- To identify skeletal factors associated with the self-correction of anterior crossbite during primary and mixed dentition.
Main Methods:
- Cephalometric analysis of 61 Japanese girls with anterior crossbite.
- Annual radiographic assessments from average age 3 years 11 months to 7 years 6 months.
- Grouping based on self-correction of anterior crossbite: primary dentition (Group N1), permanent incisor eruption (Group N2), and no self-correction (Group R).
Main Results:
- No significant skeletal differences were found between self-correcting groups (N1 and N2).
- Groups N1 and N2 exhibited larger A'-Ptm'/Pog'-Go dimensions compared to Group R (p < 0.05).
- Group N1 showed a smaller Pog'-Go/N-S ratio than Group R (p < 0.01) at the observation's end.
Conclusions:
- Favorable maxilla-to-mandible growth promotes self-correction of primary anterior crossbite.
- A relatively large mandible in proportion to the cranial base may impede the self-correction of anterior crossbite.