Gradual wear of opposing teeth is a normal phenomenon in human dentition. To ensure a better quality of life through better dental health, there is a need for quality dental restorative materials to repair or replace natural teeth. Several aspects are looked at when designing a proper dental implant. Aesthetics, durability, and integration with the supporting teeth and soft tissues are some key...

350 The excessive differential wear of teeth and restorative materials has significant deleterious effects on the biologic, functional, and esthetic condition of the masticatory system. However, controlled investigations of numerous factors that might influence tooth and restoration wear have been mainly laboratory studies, the findings of which might not correlate with either the physical prop...

objective: to measure the long-term linear hygroscopic expansion (lhe) of several materials using bulked and layered techniques. materials and methods: seven materials were used; fuji cap ii, fuji ii lc, photac-fil aplicap, vitremer, dyract, tetric and z100. ten specimens (6×4 mm) were made for each material using layered and bulked techniques (each group comprises five specimens). the specimen...

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...

news & views limits cell spreading 5 , and prompts adhesion sites to align and provide signals that must be distinct from those received from a non-confined ligand 2. Cell collectives also sense open edges via the reduced impact of auto-inhibitory activity, such as the release of the cytokine TGF-β between cells 6 , or via the lack of cell–cell junctions mediated by cadherins or other adhesion ...

The contrast ratio, light reflectivity, scattering coefficient, and absorption coefficient of four composites and an unfilled resin were calculated algebraically from reflection spectrophotometric data using Kubelka's equations. The correlation coefficient between calculated and experimental values of contrast ratio was 0.9996. Values of infinite optical thickness ranged from 4.19 to 6.70 mm.

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...

BACKGROUND Recently, there has been an expansion in the range of tooth-coloured restorative materials available. In 1999, the National Health and Medical Research Council recommended clinicians use alternatives to amalgam in children 'where appropriate'. METHODS A three-part 29-item questionnaire was developed, tested in a focus group, and distributed to members of the Australasian Academy of...

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...