Produção Nacional
Revisado por pares
Comparison of cone-beam computed tomography with intraoral photostimulable phosphor imaging plate for diagnosis of endodontic complications: a simulation study
2013; Elsevier BV; Volume: 117; Issue: 1 Linguagem: Inglês
10.1016/j.oooo.2013.02.025
ISSN2212-4411
AutoresP. S. S. D'Addazio, Antônio Carlos Pires Carvalho, Celso Neiva Campos, Karina Lopes Devito, Mutlu Özcan,
Tópico(s)Advanced X-ray and CT Imaging
ResumoWith great interest we read the article by Eskandarloo et al.,1Eskandarloo A. Mirshekari A. Poorolajal J. Mohammadi Z. Shokri A. Comparison of cone-beam computed tomography with intraoral photostimulable phosphor imaging plate for diagnosis of endodontic complications: a simulation study.Oral Surg Oral Med Oral Pathol Oral Radiol. 2012; 114: e54-e61Abstract Full Text Full Text PDF PubMed Scopus (29) Google Scholar entitled “Comparison of cone-beam computed tomography with intraoral photostimulable phosphor imaging plate for diagnosis of endodontic complications: a simulation study” in Oral Surg Oral Med Oral Pathol Oral Radiol. This study employed a method very similar to a study performed by our group.2D'Addazio P.S.S. Campos C.N. Özcan M. Teixeira H.G.C. Passoni R.M. Carvalho A.C.P. A comparative study between cone-beam computed tomography and periapical radiographs in the diagnosis of simulated endodontic complications.Int Endod J. 2011; 44: 218-224Crossref PubMed Scopus (68) Google Scholar We congratulate the authors for their work but we would also like to discuss the topic with some of our observations. Initially, we would like to emphasize that the use of simulated lesions in vitro, in a controlled study, as performed in our study2D'Addazio P.S.S. Campos C.N. Özcan M. Teixeira H.G.C. Passoni R.M. Carvalho A.C.P. A comparative study between cone-beam computed tomography and periapical radiographs in the diagnosis of simulated endodontic complications.Int Endod J. 2011; 44: 218-224Crossref PubMed Scopus (68) Google Scholar and the study in question1Eskandarloo A. Mirshekari A. Poorolajal J. Mohammadi Z. Shokri A. Comparison of cone-beam computed tomography with intraoral photostimulable phosphor imaging plate for diagnosis of endodontic complications: a simulation study.Oral Surg Oral Med Oral Pathol Oral Radiol. 2012; 114: e54-e61Abstract Full Text Full Text PDF PubMed Scopus (29) Google Scholar included smaller sample size for each lesion. Certainly, sample size directly influences the reliability of the results. However, analysis of large number of images of similar lesions may lead to misinterpretation, also influencing the reliability of the results. If the examiner has not been informed about the type of injury, or whether a complication was present, a small sample size, can have a significance on the diagnosis. Moreover, in the “Material and Methods” it was described that the images obtained were cut with the cone-beam computed tomography (CBCT) apparatus and they were predefined for the analysis of observers. In fact, one of the great advantages of multiplanar images, such as CT images, is the possibility of sequential viewing of different cuts in different planes. Information from different planes would be more interesting than to manipulate images on appropriate software for each system, seeking for the injury or the complication visible in different cuts and planes. Concerning the acquisition of images assigned for the tomograph NewTom, the authors stated that they used a small field of view (FOV) of 15.2 cm, which is actually a large FOV. Also, in the images obtained by 3D-CT scanner Promax (Planmeca Inc., Roselle, IL, USA), the FOV used was not named. At present, it is known that the size of the FOV has a significant influence on radiation dose and image quality.3Loubele M. Jacobs R. Maes F. et al.Image quality vs radiation dose of four cone beam computed tomography scanners.Dentomaxillofac Radiol. 2008; 37: 309-318Crossref PubMed Scopus (97) Google Scholar Thus, it is very important to correctly identify the FOV in such studies. Similarly, obtained radiographs and computed tomography (CT) images from the jaws (Figure 3), are impossible to review for the readers as they are completely distorted. In the discussion concerning the data obtained from the analysis of external resorption, the authors noted that the results corroborate findings of previous in vitro studies, highlighting the limitations of obtaining, simulated lesions, similar to lesions in vivo. However, in an in vivo study, published by Patel et al.,4Patel S. Dawood A. Wilson R. Horner K. Mannocci F. The detection and management of root resorption lesions using intraoral radiography and cone beam computed tomography – an in vivo investigation.Int Endod J. 2009; 42: 831-838Crossref PubMed Scopus (174) Google Scholar highly satisfactory results were reported in detecting lesions of resorptions, validating the use of CBCT as the gold standard for the diagnosis of external and internal resorptions. It is also important to note that the analysis of images obtained in in-vitro studies excludes the information attained from the history of the patient and the clinical examination. Also, observers do not see the presence of bone lyses adjacent to certain dental injuries, which may be important in directing the demand of further information for the particular lesion. In conclusion, despite the modifications made in this study with a larger sample size and involving more observers, the results were similar to those found in our previous study.2D'Addazio P.S.S. Campos C.N. Özcan M. Teixeira H.G.C. Passoni R.M. Carvalho A.C.P. A comparative study between cone-beam computed tomography and periapical radiographs in the diagnosis of simulated endodontic complications.Int Endod J. 2011; 44: 218-224Crossref PubMed Scopus (68) Google Scholar We agree with the authors that CBCT should be used cautiously that is to say only in cases where additional information is needed for digital or non-digital conventional radiography. In ReplyOral Surgery, Oral Medicine, Oral Pathology and Oral RadiologyVol. 117Issue 1PreviewWe appreciate Dr. D'Addazio PSS et al. for their attention to our paper entitled “Comparison of cone-beam computed tomography with intraoral photostimulable phosphor imaging plate for diagnosis of endodontic complications: a simulation study”1 which was published in Oral Surg Oral Med Oral Pathol Oral Radiol in 2012. We hope the following comments be helpful for the readers. Full-Text PDF
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