Comparison of image performance between cone-beam computed tomography for dental use and four-row multidetector helical CT

Abstract

The authors evaluated the imaging performance of cone-beam computed tomography (CBCT) for dental use using 3DX multi-image micro-CT (Morita Co., Kyoto, Japan) and four-row multi-detector helical computed tomography (MDCT) using an Asteion (Toshiba, Tokyo, Japan). A dried right maxillary bone was cut into eight slices 2 mm thick toward the zygomatico-palate and used as a phantom. Images of the phantom were then taken using 3DX and MDCT. The images of two bone slices were evaluated by five dentists for image quality and reproducibility of cancellous bone, as well as enamel, dentin, pulp cavity, periodontal ligament space, lamina dura and the overall image. Using the MDCT images as the standard, the 3DX images were evaluated with a subjective 5-level scale: 3 for an image equal to the MDCT image, 4 or greater for better, and 2 or lower for worse. The scores for all parameters exceeded 4 points. Maximum mean score was 4.8 for the lamina dura. Statistically significant differences were found for all items (P < 0.01). Our subjective evaluation of imaging performance clarified that 3DX was superior to MDCT. The results of this study suggest that 3DX is useful for imaging in the dental field.

Micro-CT Analysis of Rabbit Cancellous Bone Around Implants

“…Maximum resolution (150 nm) was obtained by adding more improvements to the detector and the sample stage. The resolution obtained in our study (150 nm) is greater than the higher resolution (200 nm) reported by other studies 10,11) . Fig.…”

Importance of cone beam computed tomography for diagnosis of calcifying cystic odontogenic tumour associated to odontoma - Report of a case

“…These changes allow a less expensive, smaller machine that exposes the patient to approximately 20% of the radiation of an helical CT, equivalent to the exposure from a full-mouth periapical series. Due to a difference in voxel size, CBCT of a limited area is also very effective in achieving high spatial resolution in comparison with conventional CT (9). Clinically, CBCT has a wide range of applications; for example, it may be used to determine the extent and condition of the internal structure of lesions, the fracture of teeth roots, the condition of impacted teeth and pathologic conditions in jaw bones (8).…”

Cone beam CT in dental practice

“…11,12 These advantages make CBCT technology particularly well suited to hard tissue imaging and dentistry. As the X-ray dose is so much lower than for conventional CT scanners, it is diffi cult to justify the use of conventional CT for elective dental and maxillofacial procedures when CBCT is available.…”