Reliability and Accuracy of Tweed’s Triangle, Mandibular Length & Corpus Size on Lateral 2D Cephalogram and 3D CBCT Scan


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Article type :

Original Article

Author :

Renuka A. Patel, Ashish B. Panday, Falguni N. Mehta, Vimal S. Parmar, Vishal D. kathiriya

Volume :

4

Issue :

3

Abstract :

Objectives- To assess the precision and reliability of Tweed's Triangle and effective mandibular length, corpus size on 2 dimensional conventional lateral cephalogram and 3D CBCT scan. Methods - 30 male adults are selected for (group A) - manual tracing, (group B) - on screen digitized tracing by software for lateral 2D cephalogram, & (group C)- digital tracing by software for 3D CBCT scan for angular measurements of Tweed's Triangle (FMA, IMPA, FMIA) and linear measurements of effective mandibular length ( Co-Gn ) and corpus size(Go-Gn). Results- Statistical analysis by ANOVA and post HOC-LSD test reveals significant difference for FMA (p Conclusions -3D CBCT scan for Tweed's triangle, effective mandibular length and corpus size can be more precise and reliable for diagnosis and treatment planning.

Keyword :

- Lateral cephalogram, Tweed’s triangle, Effective mandibular length, Mandibular corpus size, 3D CBCT scan.