Objective and subjective image evaluation of maxillary alveolar bone based on cone beam computed tomography exposure parameters.

Objectives: The purpose of this study was to optimize the exposure parameters for cone beam computed tomography (CBCT) for performing diagnostic imaging of maxillary alveolar bone.

Study Design: CBCT (Promax 3 D Max) was performed on a frozen human cadaver head. Image homogeneity and the degree of alveolar bone contrast were determined by objective assessment using ImageJ software and subjective assessment by orthodontists and oral radiologists.

Improving the Evaluation of Alveolar Bone Grafts With Cone Beam Computerized Tomography.

Objective: Cone Beam computed tomography (CBCT) is used increasingly as a replacement for periapical x-rays when evaluating alveolar bone grafting. The manufacturer's standard settings for dental imaging may not, however, represent the optimal settings for evaluating postoperative alveolar bone grafts. We examined the influence of exposure parameters on CBCT image quality to optimize the quality of CBCT images while reducing the radiation dose to the minimum level necessary to obtain adequate images.

Image assessment of MSCT and CBCT scans for rapid maxillary expansion: a pilot study.

Objectives: The accuracy of cone-beam technique, cone-beam computed tomography (CBCT), compared with that of the multislice spiral CT (MSCT), for image-based linear measurements of midpalatal suture was assessed.

Material And Methods: Two measurements were performed by one investigator on the dry skull by using one digital caliper and in the axial cuts by using software. A 2D object-based image registration process was applied to determine the best affine transformation that maps a 2D input image (CBCT) in a reference image (MSCT).

Influence of enamel sandblasting prior to etching on shear bond strength of indirectly bonded lingual appliances.

Objective: To test the null hypothesis was that there is no difference in the mean shear bond strength of indirectly bonded lingual brackets prepared with or without sandblasting prior to acid etching.

Materials And Methods: Forty extracted human premolars were obtained and randomly divided into two groups of 20 each: group I (control), phosphoric acid and indirect bonding with Maximum Cure and Phase II (Reliance, Itasca, Ill); and group II, sandblasting with 50 μm aluminum oxide (Microetcher, Danville Engineering, Danville, Calif) prior to etching and indirect bonding. All products were used according to the manufacturer's instructions.