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Correlations between dentoskeletal variables and deep bite in Class II Division 1 individuals
Leandro Silva Marques1, Mônica Costa Armond, Maria Letícia Ramos-Jorge
1Department of Orthodontics, School of Dentistry, Vale do Rio Verde University, Três Corações, MG, Brazil. lsmarques21@yahoo.com.br
Brazilian Oral Research
|March 2, 2011
Summary
This study identified key dentoskeletal factors contributing to deep bite in Class II Division 1 patients. Males exhibited distinct cephalometric patterns, but treatment approach did not significantly alter measurements.
Area of Science:
- Orthodontics
- Craniofacial Morphology
- Dentofacial Analysis
Background:
- Deep bite is a common occlusal issue in Class II Division 1 malocclusions.
- Understanding the underlying dentoskeletal patterns is crucial for effective treatment planning.
Purpose of the Study:
- To analyze the cephalometric characteristics of Class II Division 1 individuals with deep bite.
- To investigate correlations between dentoskeletal variables and deep bite severity.
- To compare these patterns between genders and treatment approaches (with/without premolar extraction).
Main Methods:
- Retrospective analysis of 70 lateral cephalograms from individuals (mean age 11.6 years) with ANB ≥ 5º and overbite ≥ 4 mm.
- Statistical analysis included t-tests, Mann-Whitney tests, and Spearman correlation.
- Sample divided by gender and treatment plan (extraction vs. non-extraction).
Main Results:
- Males showed significantly higher values for Go-Me, Ar-Pog, PM-1, and PM-CMI.
- No significant differences in cephalometric measurements were observed between extraction and non-extraction groups.
- Deep bite positively correlated with PM-1 and SNA, and negatively with Go-Me, Ar-Pog, SNB, and SNGoMe.
Conclusions:
- Factors contributing to deep bite include increased lower anterior dentoalveolar height/lower incisor extrusion, a horizontal growth pattern, maxillary protrusion, and mandibular retrusion.
- Cephalometric patterns differ between genders in Class II Division 1 deep bite cases.
- Treatment modality (extraction vs. non-extraction) did not reveal significant cephalometric differences in this cohort.
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