EVALUATING DIFFERENT CEPHALOMETRIC FACIAL PLANESWITH INTERCANINE WIDTH IN ORTHODONTIC PATIENTS
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Keywords
Abstract
Background: Intercanine width plays a crucial role in determining dental arch form, occlusal stability, and facial esthetics in orthodontic patients. Cephalometric facial planes, including the Frankfort horizontal, palatal, and mandibular planes, are commonly used to analyze craniofacial morphology; however, their correlation with intercanine width has not been fully established.
Methods: A cross-sectional study was conducted on 120 orthodontic patients aged 14–25 years. Lateral cephalograms were used to measure Frankfort horizontal plane (FHP), palatal plane (PP), and mandibular plane (MP) angles relative to a reference cranial base line. Intercanine width (ICW) was measured on dental casts using a digital caliper. Patients were divided into three skeletal pattern groups based on mandibular plane angle: low-angle (<28°), average-angle (28–36°), and high-angle (>36°). Pearson correlation, ANOVA, and linear regression were applied.
Results: The mean intercanine width was 26.7 ± 2.1 mm. High-angle cases had significantly lower ICW (25.2 ± 1.8 mm) compared to low-angle (27.8 ± 1.7 mm) and average-angle (26.9 ± 1.9 mm) groups (p < 0.001). A significant negative correlation was observed between mandibular plane angle and ICW (r = –0.58, p < 0.001). FHP and PP showed weaker correlations (r = –0.21 and –0.27, respectively; p > 0.05).
Conclusion: Mandibular plane angle demonstrated a significant inverse relationship with intercanine width, suggesting its clinical relevance in diagnosis and arch form planning in orthodontics. Other cephalometric planes had a limited predictive value.
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