Comparação entre dois tipos de filtros tomográficos e sua respectiva imagem normal em tomografia computadorizada de feixe cônico da região mandibular de pacientes da PO-UEA

Abstract

The advances in tomography techniques of the head and neck region for clinical applications started in the early 70’s. It has become widely studied, attracting the interest of dentists, especially in the areas of Orthodontics, Oral Diagnosis, Oral and maxillofacial Surgery and Traumatology and Dental Implants, enabling the appearance of Cone Beam Computed Tomography (CBCT), being indicated especially for the dentomaxillofacial region. It has advantages and facilities when compared to Fan Bean CT. It is known that imaging exams are subject to loss of quality, allowing the emergence of tools inserted in the softwares, the tomographic filters. The influence of Angio Sharpen Medium 5x5 (ASM) and Smooth 3x3 (S) filters was evaluated, comparing them with each other and with the actual image obtained from the CBCT, selecting the best tomographic filter for eventual treatments of the mandibular region. Quantitative and qualitative data were collected. The research was performed with fifty CBCTs, twenty-five of the male gender and twenty-five of the female gender. Twenty evaluators participated in the research, with ten dental students and ten oral maxillofacial surgeons. The tomographic images of the mandibular canal region were analyzed following a hierarchy of pre-defined image quality. Based on the results, it was concluded that CBCT has more advantages than FBCT, among them the reduction of the patient's exposure to ionizing radiation, as well as the low dose of radiation used to obtain a quality image. The ASM filter stood out as the best filter to be used for visualization of the mandibular canal.