Journal article
Comparison of observer reliability of three-dimensional cephalometric landmark identification on subject images from Galileos and i-CAT cone beam CT
Dento-maxillo-facial radiology, Vol.42(9), pp.20130059-20130059
10/2013
DOI: 10.1259/dmfr.20130059
PMCID: PMC3828023
PMID: 23833319
Abstract
Objectives: Recently, there has been increasing interest in the use of cone beam CT (CBCT) for three-dimensional cephalometric analysis and craniofacial reconstruction in orthodontic and orthognathic surgical treatment planning. However, there is a need to redefine the cephalometric landmarks in three dimensional cephalometric analysis and to demonstrate the reproducibility of landmark identification on the type of CBCT machine being used.
Methods: CBCT images of 20 subjects aged 15-25 years were selected, ten each from Galileos(®) (Sirona Dental Systems Inc., Bensheim, Germany) and Next Generation i-CAT(®) (Imaging Sciences International, Hatfield, PA). 2 observers located 18 landmarks on each subject twice using Dolphin-3D v. 11 software (Dolphin Imaging and Management Systems, Chatsworth, CA). Inter- and intraobserver reliability was assessed using Euclidean distances and linear mixed models.
Results: Overall, the intra- and interobserver reliability was excellent for both machines. The landmarks Gonion, Nasion, Orbitale and Anterior Nasal Spine (ANS) showed the greatest median Euclidean distances for both intra- and interobserver measurements. There were significant observer effects in the unified models for Sella, Menton and all six dental landmarks. For Sella, the distances between the measures were significantly smaller (more closely spaced) on the i-CAT machine than on the Galileos in both intra- and interobserver measurements.
Conclusions: The intra- and interobserver reliability was excellent for both machines. Some of the landmarks were not as reproducible as others. Which machine produced the highest reliability depended on the landmark considered.
Details
- Title: Subtitle
- Comparison of observer reliability of three-dimensional cephalometric landmark identification on subject images from Galileos and i-CAT cone beam CT
- Creators
- R A KatkarC KummetD DawsonL Moreno UribeV AllareddyM FinkelsteinA Ruprecht
- Resource Type
- Journal article
- Publication Details
- Dento-maxillo-facial radiology, Vol.42(9), pp.20130059-20130059
- DOI
- 10.1259/dmfr.20130059
- PMID
- 23833319
- PMCID
- PMC3828023
- NLM abbreviation
- Dentomaxillofac Radiol
- ISSN
- 0250-832X
- eISSN
- 1476-542X
- Publisher
- The British Institute of Radiology; 48–50 St John Street, London EC1M 4DG, UK
- Alternative title
- Observer reliability for CBCT cephalometric landmark location in vivo
- Language
- English
- Date published
- 10/2013
- Academic Unit
- Radiology; Orthodontics; Oral Pathology, Radiology and Medicine; Anatomy and Cell Biology; Biostatistics; Pediatric Dentistry; Craniofacial Anomalies Research Center; Dental Research
- Record Identifier
- 9984065810802771
Metrics
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