Abstract
The objective of this study was to evaluate the diagnostic yield of dental radiography (DR) and 3 cone-beam computed tomography (CBCT) methods for the identification of predefined anatomic structures in cats. For 5 feline cadaver heads and 22 client-owned cats admitted for evaluation and treatment of dental disease, a total of 22 predefined anatomic structures were evaluated separately by use of the DR method and 3 CBCT software modules [multiplanar reconstructions (MPR), tridimensional (3-D) rendering, and reconstructed panoramic views (Pano)]. A semi quantitative scoring system was used, and mean scores were calculated for each anatomic structure and imaging method. The Friedman test was used to evaluate values for significant differences in diagnostic yield. For values that were significant the Wilcoxon signed rank test was used with the Bonferroni-Holm multiple comparison adjustment to determine significant differences among each of the possible pairs of diagnostic methods. Differences of diagnostic yield among the DR and 3 CBCT methods were significant for 17 of 22 anatomic structures. For these structures, DR scores were significantly higher than scores for Pano views for 2 of 17 structures, but DR scores were significantly lower than scores for Pano views for 6 anatomic structures, tridimensional rendering for 10 anatomic structures, and MPR for 17 anatomic structures. In conclusion, it was found that CBCT methods were better suited than DR for the identification of anatomic structures in cats. Results of this study can serve as a basis for CBCT evaluation of dentoalveolar and other maxillofacial bony lesions in cats.
Highlights
The benefits of performing dental radiography (DR) are welldocumented, and its routine use has been considered standard of practice in veterinary dentistry for the past 20 years [1, 2]
Dental radiography is recognized as a valuable imaging modality with high diagnostic yield, which can be implemented at a relatively low cost
Client-owned cats that were admitted to the Dentistry and Oral Surgery Service at the University of California-Davis for evaluation and treatment of oral disease between August 2014 and February 2017 for which full-mouth DR and Cone-beam computed tomography (CBCT) scans of the skull were obtained were included in the study
Summary
The benefits of performing dental radiography (DR) are welldocumented, and its routine use has been considered standard of practice in veterinary dentistry for the past 20 years [1, 2]. Cone-beam computed tomography (CBCT) is rapidly gaining acceptance in the field of veterinary dentistry and oral surgery. Cone-beam CT may prove to be the major advancement in veterinary dentoalveolar and maxillofacial imaging because of its ability to provide 3-D imaging at a lower cost than multidetector row CT (i.e., conventional CT), and at a lower radiation risk comparable to conventional CT. The use of rapid scan technology, which allows for faster image acquisition than conventional CT, and the ability to post process the volumetric data into various 2-D and 3D reconstructions, makes CBCT an attractive imaging modality. Validation of the clinical application of CBCT in veterinary patients is ongoing [5,6,7,8,9,10,11,12], and more research is required to validate the use of CBCT to responsibly promote its use in routine veterinary clinical practice
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