This study evaluated the influence of cyclic loading on zirconia bar-shaped specimens after being subjected to three different surface treatments: particle abrasion with either 50 μm or 110 μm alumina and grinding with diamond points, while polished specimens served as a control. Statistical analysis revealed significant reduction (38-67%) in flexure strength (P < 0.001) after three million cyc...

INTRODUCTION Fine aerosolised droplets and splatter generated during dental procedures influences the composition of the indoor air quality of dental care facilities and poses a potential threat to the workers' health. Therefore there is a need to assess the risks from exposure to bioaerosols and splatter and identify measures of reducing possible hazards. METHODOLOGY A review of the literatu...

Non-carious cervical lesion (NCCL) is the loss of hard dental tissue commonly observed at the buccal and labial tooth surfaces at the cementoenamel junction (CEJ). Most NCCLs of teeth can be classified into four categories: attrition, erosion, abrasion, and stress-induced cervical lesion. Stress-induced cervical lesions are loss of tooth structure that results from repeated tooth flexure caused...

background: dental clinics are known to be one of the largest users of toxic inorganic mercury. it is well documented that dentists and dental assistants who work with amalgam are chronically exposed to mercury vapor. this study investigates exposure to mercury vapor in a dental clinic. methods: gbc cold vapor atomic absorption spectrometry (aas), using sodium borohydride as the reducing agent,...

BACKGROUND Dental unit waterlines (DUWLs) are ideal environment for development of microbial biofilms. Microbial contamination of water in DUWLs is thought to be the result of biofilm formation as it could serves as a haven for pathogens. The aim of this study was to assess microbial quality of water in dental unit waterlines of dental units located at the dental school of Isfahan University of...

Objective: This study purposed to estimate the prevalence of DH and how effective etiological factors are in development Turkey.&#x0D; Methods: Demographic features, hygiene habits, bruxism, beverage parafunctional smoking, other medical problems were asked. Air was blasted teeth via air-water syringe for 3 seconds. The Visual Analogue Scale used measure sensitivity, data recorded 0-100 mm rang...

High-pressure air enters the air-turbine of the dental handpiece and strikes the blades to drive the impeller. The air-turbine has impeller and the air tube is connected to the air-turbine housing. The flowfield of the air-turbine were investigated for the optimum air-turbine design using ANSYS CFX. The objective of the research was to find an optimum design variables for the air-turbine to inc...

Over the last century, humans from industrialized societies have witnessed a radical increase in some dental diseases. A severe problem concerns the loss of dental materials (enamel and dentine) at the buccal cervical region of the tooth. This "modern-day" pathology, called non-carious cervical lesions (NCCLs), is ubiquitous and worldwide spread, but is very sporadic in modern humans from pre-i...

Background: Abrasion is the mechanical wearing of dental hard tissue and commonly affects cervical tooth structure. The main predisposing factors for abrasion are brushing method type toothpaste used. Toothpaste an important component in etiology abrasion. Most contains abrasive agents cleaning, maintaining, improving health. There two types commercially available; synthetic herbal formulations...

OBJECTIVES Aerosols generated during dental procedures have been reported to contain endotoxin as a result of bacterial contamination of dental unit water lines. This study investigated the determinants of airborne endotoxin exposure in dental healthcare settings. METHODS The study population included dental personnel (n = 454) from five academic dental institutions in South Africa. Personal ...