Tomografia computadorizada de feixe cônico na odontologia veterinária: descrição e padronização da técnica

Roza, Marcello Rodrigues da; Silva, Luiz A.F.; Januário, Alessandro Lourenço; Barriviera, Maurício; Oliveira, Alexandre C.A. de; Fíoravantí, Maria Clorínda Soares

doi:10.1590/s0100-736x2009000800004

Cited by 6 publications

(18 citation statements)

References 17 publications

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“…Nevertheless, it has become a reliable auxiliary method for diagnosing canine and feline odontostomatological abnormalities [19]. Due to the success of this technique, we recommend that it be used as an auxiliary exam for diagnosing infirmities such as feline dental resorptive lesions (FDRLs), temporomandibular joint abnormalities, facial trauma, and periodontal disease as well as planning dentistry implantation.…”

Section: Introductionmentioning

confidence: 99%

Cone beam computed tomography and intraoral radiography for diagnosis of dental abnormalities in dogs and cats

et al. 2011

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The development of veterinary dentistry has substantially improved the ability to diagnose canine and feline dental abnormalities. Consequently, examinations previously performed only on humans are now available for small animals, thus improving the diagnostic quality. This has increased the need for technical qualification of veterinary professionals and increased technological investments. This study evaluated the use of cone beam computed tomography and intraoral radiography as complementary exams for diagnosing dental abnormalities in dogs and cats. Cone beam computed tomography was provided faster image acquisition with high image quality, was associated with low ionizing radiation levels, enabled image editing, and reduced the exam duration. Our results showed that radiography was an effective method for dental radiographic examination with low cost and fast execution times, and can be performed during surgical procedures.

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Section: Introductionmentioning

confidence: 99%

Cone beam computed tomography and intraoral radiography for diagnosis of dental abnormalities in dogs and cats

et al. 2011

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“…Thus, laboratory tests were solicited (blood count, aspartate aminotransferase, bilirubin, alkaline phosphatase, urea, creatinine, total/fractions and urinalysis) and no relevant changes were noticed. The animal was anesthetized in order to perform a cone beam computed tomography, as described [15]. Cone beam computed tomography (CBCT) scan revealed destruction of the frontal, nasal, incisive, parietal and maxillary part of the zygomatic process of temporal bone on both sides (Fig.…”

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Aggressive Spindle Cell Rhabdomyosarcoma in an 11-Month-Old Boxer Dog

Roza

Amorim

Carneiro

et al. 2010

The Journal of Veterinary Medical Science

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ABSTRACT. Rhabdomyosarcoma (RMS) is a malignant neoplasm derived from mesenchymal tissue with a tendency toward myogenic differentiation associated with the embryogenesis of skeletal muscle. According to the histological features, it can be classified in embryonal, botryoid, alveolar, and pleomorphic, which usually correspond to clinical behavior and prognosis. The spindle cell (SCRMS) variant is a rare subtype of the embryonal RMS and is considered to be less aggressive lesion. The aim of the present paper is to report an unusual case of SCRMS in an 11-month-old male boxer dog diagnosed as extensive SCRMS that affected the frontal region of the skull. Due to the aggressive nature of the lesion and poor clinical prognosis the dog's owners preferred euthanasia as a treatment. A full postmortem examination was carried out. Microscopically, the lesion was composed of a highly cellular proliferation of spindle cells arranged in long and intersecting fascicles. After performing the immunohistochemical studies (HHF-35, smooth muscle actin, desmin and MyoD1), the present case was diagnosed as SCRMS.

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“…A IRM normalmente não é utilizada para observação das estruturas ósseas do crânio uma vez que a tomografia computadorizada é considerada o padrão-ouro para esse fim, bem como a tomografia computadorizada de feixe cônico, para a região dentomaxilofacial (Roza et al 2009), porém notou-se nas imagens produzidas que ela foi eficiente em demonstrar a região da medula óssea e, portanto, concordamos com Amaral et al (2003) na indicação da IRM para detectar lesões ósseas nos estágios iniciais quando restritas à medula óssea.…”

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Imagem por ressonância magnética na investigação da cabeça de cães

et al. 2010

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ABSTRACT.-Hage M.C.F.N.S., Iwasaki M., Rabbani S.R., Kamikawa L., Cervantes H.J.R., Bombonato P.P., Sterman F. Magnetic resonance imaging (MRI) is the most sensitive method of diagnostic imaging to evaluate soft tissues, specially the brain, however it is expensive. The method is based on the nuclear magnetic resonance phenomenon that occurs when atomic nucleus with magnetic proprieties in the body are submitted to a strong magnetic field, and excited with radio frequency generating a radio frequency signal captured by a receptive antenna. The signal is processed by Fourier Transform for the image formation. This study had the objective to obtain 10 complete exams of heads in cadavers of normal dogs to MRI and to make an Atlas of head structures. The images were obtained with a magnetic resonance unit Gyroscan S15/HP Philips using a magnetic field of 1,5Tesla. The cadavers were positioned with the head into a human head coil and submitted to sagittal slices used to plan transverse and dorsal slices in T1, T2 and DP spin-echo sequences. In T1 we adjusted TR=400ms and TE=30ms, in T2 TR=2000ms and TE=80ms and in DP TR=2000ms and TE=30ms. The slice thickness was 4mm, the number of averages 2, the matrix 256x256, the factor 1,0 and the field of view 14cm. The duration of the complete exam of the head was 74,5minutes. The images obtained with the described sequences and with the human head coil was of good quality. In T1 fat was hyperintense and fluid was hypointense. In T2 fat was less hyperintense and fluid was hyperintense. The cortical bone and the air were hypointense in all sequences used because of the low proton density. The DP sequence showed the best contrast between white and gray matter when compared with T2 and T1 sequences. Distinction of cerebral sulcus and gyrus was possible because T2 showed the cerebrospinal fluid. The identification of bone structures that compound the region, muscles, main venous and arterial vessels and structures of the central nervous system, besides elements of the digestory and respiratory systems and structures of the eyes among others was possible through contrast obtained with MRI. In this study the MRI acquired in T1, DP and T2 were complementary for the anatomic study of the head and been able to demonstrate the structures of the canine head with rich anatomic details. The time used to 1 Recebido em 29 de novembro de 2009. Aceito para publicação em 24 de fevereiro de 2010.

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Tomografia computadorizada de feixe cônico na odontologia veterinária: descrição e padronização da técnica

Cited by 6 publications

References 17 publications

Cone beam computed tomography and intraoral radiography for diagnosis of dental abnormalities in dogs and cats

Cone beam computed tomography and intraoral radiography for diagnosis of dental abnormalities in dogs and cats

Aggressive Spindle Cell Rhabdomyosarcoma in an 11-Month-Old Boxer Dog

Imagem por ressonância magnética na investigação da cabeça de cães

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