OBJECTIVE: To evaluate reliability in 3-dimensional (3D) landmark identification using cone-beam computerized tomography (CBCT). STUDY DESIGN: Twelve presurgery CBCTs were randomly selected from 159 orthognathic surgery patients. Three observers independently repeated 3 times the identification of 30 landmarks in the sagittal, coronal, and axial slices. A mixed-effects analysis of variance model estimated the intraclass correlations (ICC) and assessed systematic bias. RESULTS: The ICC was >0.9 for 86% of intraobserver assessments and 66% of interobserver assessments. Only 1% of intraobserver and 3% of interobserver coefficients were <0.45. The systematic difference among observers was greater in X and Z than in Y dimensions, but the maximum mean difference was quite small. CONCLUSION: Overall, the intra- and interobserver reliability was excellent. Three-dimensional landmark identification using CBCT can offer consistent and reproducible data if a protocol for operator training and calibration is followed. This is particularly important for landmarks not easily specified in all 3 planes of space.
OBJECTIVE: To evaluate reliability in 3-dimensional (3D) landmark identification using cone-beam computerized tomography (CBCT). STUDY DESIGN: Twelve presurgery CBCTs were randomly selected from 159 orthognathic surgery patients. Three observers independently repeated 3 times the identification of 30 landmarks in the sagittal, coronal, and axial slices. A mixed-effects analysis of variance model estimated the intraclass correlations (ICC) and assessed systematic bias. RESULTS: The ICC was >0.9 for 86% of intraobserver assessments and 66% of interobserver assessments. Only 1% of intraobserver and 3% of interobserver coefficients were <0.45. The systematic difference among observers was greater in X and Z than in Y dimensions, but the maximum mean difference was quite small. CONCLUSION: Overall, the intra- and interobserver reliability was excellent. Three-dimensional landmark identification using CBCT can offer consistent and reproducible data if a protocol for operator training and calibration is followed. This is particularly important for landmarks not easily specified in all 3 planes of space.
Authors: G S Liedke; E L Delamare; M B Vizzotto; H L D da Silveira; J R Prietsch; V Dutra; H E D da Silveira Journal: Dentomaxillofac Radiol Date: 2012-02 Impact factor: 2.419
Authors: E L Delamare; G S Liedke; M B Vizzotto; H L D da Silveira; J L D Ribeiro; H E D Silveira Journal: Dentomaxillofac Radiol Date: 2010-10 Impact factor: 2.419
Authors: R Patcas; G Markic; L Müller; O Ullrich; T Peltomäki; C J Kellenberger; C A Karlo Journal: Dentomaxillofac Radiol Date: 2012-05-03 Impact factor: 2.419
Authors: R A Katkar; C Kummet; D Dawson; L Moreno Uribe; V Allareddy; M Finkelstein; A Ruprecht Journal: Dentomaxillofac Radiol Date: 2013-07-05 Impact factor: 2.419