Showing papers in "Dental Materials in 1994"

TL;DR: This new method permits measurement of high bond strengths without cohesive failure of dentin and it also permits multiple measurements to be made within a single tooth.

TL;DR: Low water sorption, a high filler-resin ratio, reduced particle size and hardness, and an optimal filler-matrix coupling system were related to improved composite resistance to discoloration.

TL;DR: Polymerization inhibition of the resin bonding agent is the likely mechanism for the effects of the bleaching on bond strength.

TL;DR: This study suggests that by incorporating glass fibers into PMMA denture bases, the strength of the denture can be increased.

TL;DR: A Mylar strip can create a smoother surface than the other types of tested polishing procedures, and the shades of tested resin composites were lighter after thePolishing procedures.

TL;DR: The cytotoxicity of materials which release metal ions will be significantly different depending on which cell line is selected and its passage number, and it seems reasonable to use these types of in vitro tests to rank the cytotoxicities of materials.

TL;DR: The results show that the mechanical properties of the tested materials are in some cases affected by long-term aging in water.

TL;DR: The methacrylate-modified glass ionomers of this study did not exhibit a decrease in compressive strength, modulus and diametral tensile strength as a result of prolonged storage in water at oral temperature, and could be indicated for use in applications where they are in contact with oral fluids under physiological conditions.

TL;DR: Clearfill Liner Bond and OptiBond, adhesive systems that include low-viscosity, low-modulus intermediate resins, had the highest shear bond strengths and microleakage, and Prisma Universal Bond 3 had the least microleaks at dentin margins of Class V restorations.

TL;DR: Dentin age or depth may not show as great an influence on bond strengths with the newer type of bonding systems, and the resin-impregnated layer quality may be the most important factor for obtaining high tensile bond strengths.

TL;DR: The findings of this study suggest that the resistance to fracture due to indentation of the glass-ceramic may not be affected by the cement film thickness as much as previously thought.

TL;DR: The use of a bonding agent improves the bond strength of porcelain-fused-to-milled titanium and cast high palladium/conventional porcelains.

TL;DR: It is suggested that steatite can be used as an alternative to enamel in performing two-body wear tests on dental composites and should help significantly in materials evaluation and development.

TL;DR: A study of the evolution of the surface energy components gave information on adhesion mechanisms involving hydrophilic and hydrophobic interactions and may be helpful in the formulation of conditioners and primers.

TL;DR: Data indicate that CO2 laser etching may enhance the bonding of resin composite to human enamel, and this research holds promise for conditioning enamel for bonding of adhesive restorations.

TL;DR: The results suggest that under in vivo conditions, CPC implants would not dissolve in physiological fluids, and OHAp coatings may form on the implants, which may enhance bonding of implants to bone by mechanically strengthening the interface between them.

TL;DR: The concept of maintaining the moist state of dentin and the morphological integrity of the collagen so as to facilitate optimal resin infiltration in the bonding procedure is supported.

TL;DR: Theoretical curves describing effects of the layers' elastic moduli and thickness on the force-bearing capacity of model beams indicated that for a wide range of thickness ratios and for a Wide variety of elastic modulus ratios, the tensile material dominates theforcing capacity of layered beams except when a very much lower modulus material forms the compressive layer.

TL;DR: The characteristics of the resulting composite cements suggest that the materials may be useful in pulp capping and/or cavity lining and to study the setting reactions involved.

TL;DR: The results suggest that PUDMA is an excellent toughened polymer that is sufficient for crown and bridge resins and dental composites.

TL;DR: It was concluded that rotational fatigue tests as applied in this study were a feasible fatigue testing procedure, however, SN's gathered at faster rates might need correction factors if relationships with data pertaining to clinically relevant chewing rates are to be established.

TL;DR: A newly developed composite containing the same active phosphate monomer showed a statistically significant decrease in bond strength (cohesive strength) over storage time, while in these systems, the bond strengths were limited by the cohesive strength of the resin composites.

TL;DR: The results of the current study concurred with in vivo assessments of these materials, and the use of sequential extractions was useful in determining trends in the cytotoxicity and elemental release from these materials.

TL;DR: Analyses of the data using a series model for the wear of a composite indicated that the increase in wear of the composite was not due to changes in the wear resistance of the polymer matrix, and was more likely due to increases in the dislodgment rate of filler particles and the wear rate of the filler itself.

TL;DR: It was concluded that the new surface treatment of an alumina-based ceramic makes reliable bonding possible, which may allow new indications for this material.

TL;DR: The dynamic mechanical properties of two model dental restorative copolymers were investigated to elucidate the influence of pendent group length and addition of crosslinking agent and loss factor analysis provided the most elucidation of sub-Tg transitions.

TL;DR: A methodology whereby the monomer conversion of dental restorative resins which contain no functional group acting as an internal standard can be easily determined using infrared spectroscopy is developed.

TL;DR: The hypothesis that colorants such as AgNO3 and FeCl3 act as conucleating agents with P2O5 in the Li2O-Al2O3-CaO-SiO2 system is tested and it is found that the addition of either colorant and P2 o5 produces a greater effect on crystallization and selected mechanical properties than the use of P2 O5 alone.

TL;DR: The results were supportive of including in a specification a test for solubility in water as well as one for flexural strength and flexural modulus, and an increase in the acceptable values for two of these tests was suggested.

TL;DR: The predicted clinical potential of All-Bond 2 and Scotchbond MP is inferior to that of OptiBond and A.R.T.-Bond, and no significant differences were observed before stress between the materials either in enamel or in dentin.