This study reports on a Cu-sputtered film on polystyrene (PS) leading to the discoloration/degradation of methylene blue (MB) under low intensity solar simulated irradiation. Direct current magnetron sputtering (DCMS) was used to graft uniform, adhesive Cu/Cu oxides on the polystyrene substrate. The kinetics of Cu-PS mediated MB-discoloration adding H2O2 was observed to take place within 90–120...

BACKGROUND Root fractures are a relatively rare type of injury with frequencies of 0.5-7% of traumatized permanent teeth. It is well known that teeth with intra-alveolar root fractures have a good prognosis. The pulp remains vital in about 80% of these teeth. If pulp necrosis develops, this normally only occurs in the coronal fragment. Although several studies on intra-alveolar root fractures h...

The discoloration of the fluorescent dye, Rhodamine B (Rhd B) by persulphate (KSP), was investigated by spectrophotometric methods. The discoloration reaction of Rhd B by KSP is slow. It’s first order with respect to Rhd B and KSP. It’s effective at any pH and was found to increase linearly for pH< 4, temperature, and after addition of Fe(II) and Ag(I). The rate of discoloration remained the sa...

Yellow discoloration of the skin may be caused by several etiologies, including jaundice, hypervitaminosis, drug reaction or chemical exposure. Herein we describe a 68-year-old woman with a history of breast and thyroid carcinoma, presenting with a yellow discoloration of her soles, after ingestion of one capsule a day of turmeric root extract (Bluebonnet Turmeric Root, 500 mg, Vcap), taken for...

introduction: intrinsic tooth discolorations after endodontic treatment are principally attributed to the composition of necrotic pulp tissue, hemorrhage within the pulp cavity, endodontic medicaments and/or filling materials. residual sealer left in pulp chamber after obturation can cause discoloration. the objective of this in vitro study was to evaluate coronal discoloration created by ah26 ...

STATEMENT OF PROBLEM Previous studies have shown discoloration of mineral trioxide aggregate (MTA) in contact with root canal irrigation solutions. However, there are limited data on colour stability of other calcium silicate-based materials (CSMs). OBJECTIVES This in vitro study aimed to evaluate the colour stability of three CSMs in contact with different irrigation solutions. MATERIALS A...

INTRODUCTION Mild therapeutic hypothermia is an increasingly recognised treatment option to reduce perihemorrhagic edema in severe intracerebral hemorrhage. CASE DESCRIPTION We report the case of a 77-year old woman with atypical intracerebral hemorrhage that was treated with mild hypothermia in addition to osmotic therapy. The patient's urine subsequently showed a green discoloration. Urine ...

A 42-year-old woman had pain in her hands and discoloration on the tips of her fingers and toes when exposed to cold (Figure 1). She had chronic systemic lupus erythematosus that was diagnosed seven years earlier. Her urinalysis findings were abnormal, including the presence of proteinuria and hematuria. Her creatinine level was normal, and her antinuclear antibody titer was 1:2,560. Renal biop...

Introduction Doxycycline is an antibiotic belonging to the group of tetracyclines. It is active against gram positive and gram negative bacteria. It has been on the Dutch market at least since 1973 and the oral preparation is indicated for infections of the respiratory tract, infections of the urogenital tract, infections of the skin and soft tissues, Borrelia burgdorfori infections, infections...

introduction: discoloration of dental composite resins is one of the most common reasons for replacement of these restorations. this in vitro study was carried out to evaluate the effect of aging on discoloration of silorane-based filtek p90 and micro-hybrid z250 composite resins. materials and methods:   this experimental study was carried out on 10 disk-shaped filtek p90 and z250 samples, mea...