Abstract
Introduction: Skeletal growth pattern is an important parameter used in orthodontics for diagnosis and treatment planning. Lateral cephalogram is commonly used to evaluate skeletal growth pattern. Orthopantamogram (OPG) can also be used to evaluate skeletal growth pattern with parameters like gonial angle and symphyseal angle (SA). This study deals with symphyseal angle and its correlation with skeletal growth patterns. Objective: To correlate symphyseal angle with different skeletal growth patterns in skeletal Class I sample. Materials and Methods: The study was a cross-sectional, observational study including 60 patients of age 15 - 49 years with skeletal Class I pattern selected from ANB angle. Samples were divided into horizontal, vertical and normal skeletal growth patterns according to Jarabak ratio (JR). The symphyseal angle was measured and compared among various skeletal growth patterns using one-way ANOVA test. Pearson’s correlation test was performed to correlate symphyseal angle with Jarabak ratio. Results: The mean and standard deviation of symphyseal angle in horizontal, normal and vertical growers were 155.5±9.25, 147.2±6.7, 141.9±6.4 respectively. Significant difference of symphyseal angle was found among different skeletal growth patterns using one-way ANOVA and subsequently post-hoc tests showed significant difference between the groups (p value < 0.05). High positive correlation was found (r=0.70) between symphyseal angle and Jarabak ratio. Prediction equation was derived using linear regression analysis as SA=JR(1.071)+78.80. Conclusion: Symphyseal angle and Jarabak ratio has high positive correlation in skeletal Class I subjects.
Recommended Citation
Shrestha, Dipankar; Dhakal, Jyoti; Shrestha, Rabindra Man; Acharya, Asal; and Gautam, Utsav
(2024)
"Correlation of Symphyseal Angle and Various Skeletal Patterns in Skeletal Class I Malocclusion,"
Taiwanese Journal of Orthodontics: Vol. 35:
Iss.
4, Article 1.
https://doi.org/10.38209/2708-2636.1344
Available at:
https://www.tjo.org.tw/tjo/vol35/iss4/1
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