AIM The aim of this in vitro study was to determine the two-body wear resistance of modern direct dental restorative materials. METHODS Eight standardized specimens were prepared from 14 dental restorative materials (nano-, micro-, hybrid-, macrofilled composites; compomer, silorane, ormocer); a veneering composite (Sinfony) and enamel were used for reference. Vickers hardness (HV) and inorga...

Many different instruments have been developed for the measurement of friction and wear.1-5 Often the instrument was designed to accommodate some particular type of material, environment, or test condition. Studies reported in the dental literature have been limited to wear measurements with simulated toothbrushing methods,6-9 or on prosthetic teeth mounted on an articulator.10 This study will ...

The fluoride ion has a well-established beneficial role in dentistry in protecting the teeth from assault by caries. It is known to contribute to the dynamic mineralisation process of the natural tooth mineral, and also to become incorporated with the mineral phase, forming a thin layer of fluorapatite. This is more resistant to acid attack than the native hydroxyapatite, hence protects the too...

It is well known that the features of teeth in men and women can be changed with increasing age, in which some teeth could be damaged. Thus the dental-implants, which are implanted at the positions of damaged teeth to replace the latter, are developed and used widely in dentist medicine. At present, the dental-implants are, in general, manufactured by titanium materials. Clinic experiments show...

For selecting an alloy or material to be used for implant procedure, it is necessary to remember that, there is a number of factors like corrosion behavior, mechanical properties, biocompatibility and cytotoxicity, and also the availability and cost, while the aesthetic measures needed are in a second priority. The most important property is corrosion behavior as it is responsible for the conti...

Five composite filling materials were finished using six finishing procedures currently in clinical use. The average roughness produced by each procedure was measured by means of a Surfanalyzer with four replications for each procedure on each of the five materials. Statistical analysis indicated that finishing with silicon carbide disks produced the smoothest surfaces. Acceptable surfaces were...

The use of polymers has revolutionized the biomedical industry ever since their discovery. Dental polymers, commonly known as “Dental Resins,” were first used in dentistry in 1839, and since then they are widely used especially in restorative dentistry for both cosmetic and functional purposes. A variety of different polymer materials – vinyl acrylics, epoxy resins, polyether, polysulfide, sili...

The dental environment is being polluted with metals from materials in many ways, mainly due to aerosol-generating procedures; this could affect the long-term well-being of dentists, students, and personnel. current pollution incorporates metallic nanoparticles, which are highly reactive quickly become airborne, especially those particles that unbound bulk composition. In addition, liquid mercu...

Thiol-ene systems demonstrate numerous advantageous polymerization properties in regards to rapid curing, high conversion, minimal oxygen inhibition, and reduced shrinkage stress. However, one of the drawbacks of thiol-ene systems is that commercially available monomers are not able to achieve the mechanical properties required for use as dental restorative materials. Methacrylate systems on th...