Marco Farronato1, Cinzia Maspero2, Andrea Abate2, Cristina Grippaudo3, Stephen Thaddeus Connelly4,5, Gianluca Martino Tartaglia2. 1. Department of Medicine, Surgery and Dentistry Department of Orthodontics, Università degli Studi di Milano - Fondazione IRCCS Cà Granda, Milan, Italy. marcofarronato@msn.com. 2. Department of Medicine, Surgery and Dentistry Department of Orthodontics, Università degli Studi di Milano - Fondazione IRCCS Cà Granda, Milan, Italy. 3. Department of Medicine, Surgery and Dentistry Department of Orthodontics, University of Rome "La Sapienza", Rome, Italy. 4. Department of Oral & Maxillofacial Surgery, San Francisco Veterans Affairs Health Care System, University of California San Francisco, San Francisco, CA, USA. 5. Department of Oral & Maxillofacial Surgery, University of California San Francisco, San Francisco, CA, USA.
Abstract
OBJECTIVES: To test the validity of a novel protocol for 3D sagittal jaw discrepancy assessment (skeletal class determination) through comparison with common 2D indexes by the use of reduced FOV (10 × 10) CBCT which shows at least from the Frankfurt plane to the B point vertically, and from the most anterior between A and B point to Po point horizontally. METHODS: A sample of CBCT scans of 109 adult patients (46 females; 63 males; mean age 30 years ± 11.6) equally distributed between I, II and III class was selected. Skeletal class was evaluated with specific software using the distance of A and B point's projection (AF-BF) on FHp (Frankfurt horizontal plane) and compared to 2D common indexes (ANB and Witts appraisal). The validity and reliability of the aforementioned analyses were determined using intra-class correlation coefficients, quadratic weighted Cohen's K and sensitivity. RESULT: A selected range of values of 2.5 ± 2.5 AF-BF showed a solid correlation with the ANB angle (r = 0.846, K = 0.838, p < 0.001) and moderate with Wits appraisal (r = 0.723, K = 0.720, p < 0.001). CONCLUSIONS: AF-BF showed high reliability in skeletal class determination on reduced FOV CBCT without the use of S and N cephalometric landmarks. KEY POINTS: • Reduced FOV CT allows skeletal class determination for orthodontic purposes. • A new 3D-reduced FOV cephalometry is proposed. • AF-BF is a reliable alternative to ANB.
OBJECTIVES: To test the validity of a novel protocol for 3D sagittal jaw discrepancy assessment (skeletal class determination) through comparison with common 2D indexes by the use of reduced FOV (10 × 10) CBCT which shows at least from the Frankfurt plane to the B point vertically, and from the most anterior between A and B point to Po point horizontally. METHODS: A sample of CBCT scans of 109 adult patients (46 females; 63 males; mean age 30 years ± 11.6) equally distributed between I, II and III class was selected. Skeletal class was evaluated with specific software using the distance of A and B point's projection (AF-BF) on FHp (Frankfurt horizontal plane) and compared to 2D common indexes (ANB and Witts appraisal). The validity and reliability of the aforementioned analyses were determined using intra-class correlation coefficients, quadratic weighted Cohen's K and sensitivity. RESULT: A selected range of values of 2.5 ± 2.5 AF-BF showed a solid correlation with the ANB angle (r = 0.846, K = 0.838, p < 0.001) and moderate with Wits appraisal (r = 0.723, K = 0.720, p < 0.001). CONCLUSIONS:AF-BF showed high reliability in skeletal class determination on reduced FOV CBCT without the use of S and N cephalometric landmarks. KEY POINTS: • Reduced FOV CT allows skeletal class determination for orthodontic purposes. • A new 3D-reduced FOV cephalometry is proposed. • AF-BF is a reliable alternative to ANB.
Authors: Manuel O Lagravère; Jillian M Gordon; Ines H Guedes; Carlos Flores-Mir; Jason P Carey; Giseon Heo; Paul W Major Journal: Angle Orthod Date: 2009-11 Impact factor: 2.079
Authors: Andrea Abate; Francesca Gaffuri; Valentina Lanteri; Andrea Fama; Alessandro Ugolini; Laura Mannina; Cinzia Maspero Journal: Head Face Med Date: 2022-02-02 Impact factor: 2.151
Authors: Cinzia Maspero; Andrea Abate; Francesco Inchingolo; Claudia Dolci; Maria Grazia Cagetti; Gianluca Martino Tartaglia Journal: Children (Basel) Date: 2022-03-15