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Radiographic evaluation of increased overjet in skeletal Class II and other malocclusion classifications
Akram S Alyessary1, Rawof R Al Toma1, Athraa A Abass1
1Department of Prosthodontics, College of Dentistry, University of Kerbala, Karbala, Iraq.
Journal of Orthodontic Science
|July 11, 2026
Summary
Increased overjet, a common orthodontic issue, is strongly linked to Class II malocclusion. Class III malocclusion appears protective against increased overjet, highlighting the need for early skeletal assessment.
Area of Science:
- Orthodontics
- Dental Morphology
- Cephalometrics
Background:
- Malocclusion, particularly increased overjet, affects a significant portion of the population.
- Understanding the skeletal patterns associated with increased overjet is crucial for effective orthodontic treatment planning.
Purpose of the Study:
- To determine the incidence of increased overjet in an untreated orthodontic patient population.
- To evaluate the association between increased overjet and sagittal skeletal measurements (SNA, SNB, ANB angles).
Main Methods:
- A cross-sectional study involving 585 orthodontic patients from Karbala city, Iraq.
- Cephalometric analysis using iRYS software to measure overjet and determine skeletal classes.
- Statistical analysis included Chi-square tests and binary logistic regression.
Main Results:
- Increased overjet was observed in 56.4% of subjects.
- A strong association was found between increased overjet and Class II skeletal pattern (74.8%).
- Class II malocclusion significantly increased the likelihood of increased overjet (OR = 2.379), while Class III decreased it (OR = 0.126).
Conclusions:
- Increased overjet is highly prevalent in the studied population.
- Class II skeletal pattern is strongly associated with increased overjet, while Class III malocclusion is protective.
- Early skeletal assessment is vital for accurate diagnosis and treatment planning in orthodontics.
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