A 50-year-old ex-smoker has been complaining of a 5-month history of morning cough that is productive of small amounts of discolored phlegm, fever, a 10-pound weight loss, fatigue, and a lesion on his face (Figure 1). The lesion drains, tends to heal over for a few days, then breaks down and discharges pus containing sand-like yellow-to-white particles. The patient, who had undergone coronary a...

Amelogenesis imperfecta (AI) affects enamel on primary and permanent dentition. This hereditary disorder is characterized by loss of enamel, poor esthetics, and hypersensitivity. Functional and cosmetic rehabilitation is challenging with variety of treatment options. This report presents the treatment of an AI patient using conventional fixed dentures and discusses issues related to posttreatme...

Background and Aim: Carbamide peroxide (CP) and low concentrations of hydrogen peroxide (H2O2) have been used as bleaching agents for discolored vital teeth. Long-term exposure to these whitening materials (WMs) may cause irritation and ulceration of the gingiva and other oral soft tissues. The aim of this study was to investigate cytotoxicity and mechanisms of the cytotoxic effects of these WM...

Two fused cyclopentadithiophenebis(dicyanovinylene) derivatives (FCPDT-16 and FCPDT-C24) with a low-lying LUMO energy level (3.88 eV) and a rigid core structurewere successfully synthesized.They have good thermal stability and form highly ordered packing structures both in the bulk solid state and in thin films. The field effect transistors fabricated from a solution of these two compounds show...

A pyrene-fused phenazinothiadiazole that shows electron mobilities (μe = 0.016 cm(2) V(-1) s(-1)) two orders of magnitude higher than those reported for pyrene-fused pyrazaacenes is described.

Previously published Photo Quizzes are now featured in a mobile app. Get more information at http:// www.aafp.org/afp/apps. A 50-year-old woman presented for a routine catheter change. The patient was wheelchairbound because of a history of transverse myelitis. She had urinary incontinence and was dependent on chronic urinary catheterization. The patient had no symptoms beyond discolored urine....

The embryo and endosperm are the products of double fertilization and comprise the clonally distinct products of angiosperm seed development. Recessive mutations in the maize gene discolored1 (dsc1) condition inviable seed that are defective in both embryo and endosperm development. Here, detailed phenotypic analyses illustrate that discolored mutant kernels are able to establish, but fail to m...

Purpose 1. to assess the ability of four brands translucent monolithic zirconia with different thicknesses mask discolored substrates; 2. influence glazing upon their color coordinates and masking properties.

Amelogenesis imperfecta (AI) is a hereditary disorder expressing a group of conditions that cause developmental alterations in the structure of enamel. AI is a serious problem that reduces oral health-related quality of life and causes some physiological problems. The treatment of patients with AI may upgrade the quality of life and reinforce their self-esteem. Among the treatment options for A...

porary restorative systems has enabled restorative teams to deliver significantly improved aesthetic restorations. These technological advances have enhanced the clinician’s ability to optimize the aesthetic display of discolored, malaligned, or deficient tooth structure in an otherwise harmonious and intact periodontium. In the presence of anterior hard and soft tissue deformities, however, th...