Positioning and preparation errors impacting dental panoramic radiographs in patients with mixed dentition.

Purpose: This study aimed to evaluate the quality of clinically indicated digital dental panoramic radiographs (DPRs) of children with mixed dentition. Despite the likely widespread use of this modality, recent research detailing errors on DPRs is scarce.

Materials And Methods: A consecutive case series was performed, including 178 DPRs from patients aged 6 to 12 years.

Myelin heterogeneity for assessing normal appearing white matter myelin damage in multiple sclerosis.

Background And Purpose: Conventional MRI measures of multiple sclerosis (MS) disease severity, such as lesion volume and brain atrophy, do not provide information about microstructural tissue changes, which may be driving physical and cognitive progression. Myelin damage in normal-appearing white matter (NAWM) is likely an important contributor to MS disability. Myelin water fraction (MWF) provides quantitative measurements of myelin.

Dimensional Changes of Yttria-stabilized Zirconia under Different Preparation Designs and Sintering Protocols.

Purpose: To evaluate the linear and volumetric dimensional changes that occur throughout the fabrication process of monolithic 4.5-6% yttria-stabilized zirconia copings under the influence of different preparation designs and two sintering protocols.

Materials And Methods: A titanium master die was fabricated using Atlantis core file implant-abutment.