Validity of Pi Angle in Comparison with Various Sagittal Discrepancy Indicators and its Correlation with Size and Position of the Mandible: A Cephalometric Study
محل انتشار: دوفصلنامه ارتودنسی ایران، دوره: 18، شماره: 2
سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 33
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شناسه ملی سند علمی:
JR_ORTHO-18-2_006
تاریخ نمایه سازی: 15 آذر 1402
چکیده مقاله:
Aim: To validate Pi angle with other sagittal discrepancy indicators like Beta angle, Yen angle and W angle in skeletal Class I, II and III patients, to correlate the Pi angle with the size and position of the mandible, and to evaluate the reliability of Dolphin imaging software. Methods: One hundred fifty subjects were nominated based on the inclusion criteria and their lateral cephalograms were traced based on their ANB angle, they were placed into skeletal Class I, II and III groups. A-P discrepancy indicators and parameters of the size and position of the mandible were traced manually and digitally. Results: Pi angle had ۸۵% and ۱۰۰% accuracy in identifying skeletal Class II and III groups, respectively. Parameters of the morphology of the mandible were found to have statistically significant correlation with Pi angle e.g., mandibular base length (-۰.۲۶۵), SNB (-۰.۴۰۸), articular angle (۰.۲۷۷), facial angle (-۰.۸۰۰), and Y axis (۰.۷۲۸), etc. When data was compared between manual and digital tracing, there was no difference in the mean values of Pi angle (P=۰.۸۷), Beta angle (P=۰.۷۳), and Yen angle (P=۰.۶۴) between the two techniques, suggesting good accuracy of Dolphin imaging software.Conclusion: The Pi angle could accurately differentiate the sample into skeletal Class I, II and III groups. A statistically significant correlation was determined between Pi angle and most of the parameters of the size and position of the mandible. It was found that the imaging software Dolphin ۳D is dependable to the analysis of cephalometric variables, which are not available in the software.
کلیدواژه ها:
Pi angle ، Sagittal discrepancy indicators ، Cephalometry ، Dolphin ۳D imaging software ، Orthodontics
نویسندگان
Diptesh Guha
Resident, Department of Orthodontics and Dentofacial Orthopaedics, AMC Dental College and Hospital, Ahmedabad, India
Dolly Patel
Dean and Head of the Department, Department of Orthodontics and Dentofacial Orthopaedics, AMC Dental College and Hospital, Ahmedabad, India
Surina Sinha
Lecturer, Department of Orthodontics and Dentofacial Orthopaedics, AMC Dental College and Hospital,Ahmedabad,India
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