Characteristics of Si (C,N) Silicon Carbonitride Layers on the Surface of Ni-Cr Alloys Used in Dental Prosthetics.

Chromium- and cobalt-based alloys, as well as chrome-nickel steels, are most used in dental prosthetics. Unfortunately, these alloys, especially nickel-based alloys, can cause allergic reactions. A disadvantage of these alloys is also insufficient corrosion resistance.

An Evaluation of the Mechanical Properties of a Hybrid Composite Containing Hydroxyapatite.

There is currently a lack of scientific reports on the use of composites based on UDMA resin containing HAp in conservative dentistry. The aim of this study was therefore to determine the effect of hydroxyapatite content on the properties of a hybrid composite used in conservative dentistry. This paper compares a commercial hybrid composite with experimental composites treated with 2% by weight (b/w), 5% b/w, and 8% b/w hydroxyapatite.

Quality of the Ceramic and Ni-Cr Alloy Joint after AlO Abrasive Blasting.

The purpose of this in vitro study was to determine the effect of airborne-particle abrasion process parameters on the strength of the Ni-Cr alloy-ceramic bond. One hundred and forty-four Ni-Cr disks were airborne-particle abraded with 50, 110 and 250 µm AlO at a pressure of 400 and 600 kPa. After treatment, the specimens were bonded to dental ceramics by firing.

Evaluation of the Effect of the Addition of Hydroxyapatite on Selected Mechanical and Tribological Properties of a Flow-Type Composite.

(1) Background: The aim of the study was to determine the effect of modification with sintered hydroxyapatite (HAp) on selected mechanical and tribological properties of a flow-type composite. (2) Methods: Samples in the shapes of cuboidal beams ( = 120) and cylinders ( = 120) with the proper dimensions were prepared from a standard flow-type composite and others with the addition of 2% wt., 5% wt.

Effect of SiC Abrasive Blasting Parameters on the Quality of the Ceramic and Ni-Cr Dental Alloy Joint.

The SiC abrasive blasting parameters are vital in ensuring a suitable bond between dental ceramics and the Ni-Cr alloy. The purpose of this in vitro test was to examine the strength of the joint between the Ni-Cr alloy and fused dental ceramics for SiC abrasive blasting at a specific pressure (400, 600 kPa) and particle size (50, 110, 250 µm) in order to determine the optimal treatment parameters. The test also accounted for thermal loads (5000 cycles, 5-55 °C) to which the metal-ceramic joint is subjected during use.

Clinical value of colonoscopy and positron emission tomography with computed tomography for colorectal cancer diagnosis.

Introduction: Colonoscopy and PET / CT are among the major diagnostic tests for colorectal cancer. The sensitivity, specificity, and accuracy of these studies are still being assessed differently.

Objective: The aim of the study was to compare the sensitivity, specificity and accuracy of colonoscopy and PET / CT in the diagnosis of colorectal cancer.

The impact of low- versus standard-volume bowel preparation on participation in primary screening colonoscopy: a randomized health services study.

Background: The aim of this study was to evaluate the impact of low-volume vs. standard-volume bowel preparation on participation in screening colonoscopy, bowel preparation quality, and lesion detection rates.

Methods: This was a multicenter, randomized, health services study within the population-based primary colonoscopy screening program in Poland.

Diagnosis and treatment of early gastric cancer: experience of one center.

Introduction: Gastric cancer is one of the most common malignant neoplasms in the world. Currently it constitutes the third cause of death among all malignancies. New endoscopic techniques have a potential to improve treatment results due to more frequent detection of early gastric cancer.

Barrett's esophagus and gland cancer - the experience of one center.

Objective: The aim of the study was to evaluate the prevalence and clinical aspects of Barrett's esophagus and adenocarcinoma of the lower part of esophagus in gastroscopy.

Material And Methods: Retrospective review of 10000 upper gastrointestinal endoscopic examinations were performed at the Department of Oncology Endoscopy in Bydgoszcz from 2004 to 2014 in terms of incidence of Barrett's esophagus and adenocarcinoma in the lower part of esophagus.

Results: The medical records of 5378 (53.

Benign mesocolon schwannoma in PET/CT and immunohistochemistry assessment: a case report.

Schwannoma is a common soft tissue tumour, but it appears to be very rare in the gastrointestinal tract. Benign schwannoma develops extremely rarely in the mesocolon, with only 2 patients reported in the literature. A 75-year-old woman was admitted to our Department of Oncological Surgery with an abdominal mass, which was discovered incidentally during abdominal ultrasound examination.

[Evaluation of positron emission tomography by using F-18-fluorodeoxyglucose in diagnosis of recurrent colorectal cancer].

Unlabelled: Accurate detection of recurrent colorectal carcinoma remains a clinical challenge. 18-F-fluorodeoxyglucose-positron emission tomography is new imaging technique that allows direct evaluation of cellular metabolism. This method is mainly used in oncology, especially in fusion with computer tomography (FDG-PET/CT, PET/CT Fusion).

[Chronic gastritis and ulcer disease in young men].

Examination has been carried out on 34 young men (average age: 22 years) with chronic erosive gastritis. Chronic erosions were situated most frequently in the prepyloric part of the stomach (88.2%).

Chronic erosive gastritis on morphological analysis.

The present study was carried out to systematize the histopathological markers of chronic erosive gastritis referred to also as gastritis varioliformis (GV). The study population consisted of 74 patients aged 20 to 69 years with gastroscopic GV. The samples were obtained from the erosion site and representative areas of the prepyloric region and gastric body.

[Comparative evaluation of sucralfate (Venter) and cimetidine (Altramet) efficiency in treatment of chronic erosive gastritis].

The results of patients with chronic erosive gastritis treated with sucralfate (Venter) and cimetidine (Altramet) were compared. 50 patients were treated with 4.0 g of sucralfate daily and 42 patients with 1000 mg of cimetidine daily.

[Coexistence of acute intermittent porphyria and Crohn's disease].

A very rare coexistence is described of acute intermittent porphyria and Crohn's disease in a 46-year-old woman. The diagnosis was made on the basis of the overall clinical picture confirmed by laboratory tests (porphyria) and histopathological examination (Crohn's disease).

[Neoplastic cavities of the lungs in cancer of the pancreas].

A 51-year-old females patient is reported in whom during pancreatic cancer massive oligosymptomatic and rapidly progressing breakdown of the pulmonary tissue of both apices of the lungs appeared. The cause was the presence of very numerous minute metastases of pancreatic cancer.

[Gastric secretion in chronic erosive gastritis].

In 50 patients with erosive gastritis the basic and the post-pentagastrin secretion of hydrochloric acid or glycoproteids has been studied. The results obtained have been compared with that in healthy subjects. No significant differences between the both groups investigated have been noted.