Wear Resistance of Dental Materials Which Are Used for Anterior Teeth Restorations

Abstract

The aim of this study was to compare the wear resistance of such restorative materials as composite resin, feldspathic ceramic, leucite glass ceramic with intact enamel and to draw an analogy with some similar researches. Materials and methods: In this research 20 extracted human teeth (maxillary incisors) without fillings and carious cavities were used as samples. All samples were disinfected and stored in saline in order to prevent dehydration. Teeth roots were cut off for the measure of fixation on an organic glass plate using chemically polymerizable resin. If necessary, the teeth were also cut on their lateral sides in order to give them equal size. The samples were placed in a frame-holder, located on the lever of the machine MI-2, which determines abrasion resistance under slipping. Results: The research has revealed that the average wear resistance of natural teeth was 122,67±4.9 J/mm3 (Tab 1). The archived result overcomes dental composite resin twice more (62.8±1.21 J/mm3), feldspathic ceramic 6.5 times more (16.32±1.2 J/mm3) and leucite ceramic over the half (73.79±3.12 J/mm3) Conclusion: Thus, according to this performed research and the analysis of the relative literature sources it can be stated that dental composite resin and leucite ceramics may be proposed as the materials of choice for anterior restoration of teeth. They have shown the good wear resistance and tolerance to antagonizing natural teeth.

Features of Occlusal Correlations of Molars in the Dental Clinic

“…As a result of odontoglyphic study, we have found that for all molars of the maxilla and the first molar of the mandible is characteristic the presence of a continuous distal crest of the trigon, which forms the Y-type of odontoglyphic pattern and is considered to be an archaic sign. This results are confirmed by the work of a number of authors [9,10,11,12]. As a result of our study, we also found out that on the second and third molars of the mandible, it is separated by a central groove.…”

Comparative Evaluation of Histotoxicity Indicators of Metal Alloys for the Manufacture of Metal Ceramic Dental Constructions

“…A careful histological analysis of the capsules formed around the metal alloy samples during two periods of the experiment showed that the healing time of the subcutaneous tissue was not the same. The most complete healing, that is, the formation of mature fibrous connective tissue, occurred during the implantation of the cobaltbased alloy «Remanium-2000» [8,12]. The thickness of both the inner and outer layers along the entire perimeter of the sample bed is not the same.…”

“…Studies of the effects of metal alloys on the tissues of the oral cavity indicate that the metal ions that are released into the oral fluid, due to the significant permeability of the mucous membrane that adsorbs them, cause toxic effects on the human body. It is known that most modern metal alloys used in dental practice are not completely indifferent to the human body [11,12].…”

Influence of Layer Thickness and Shade on the Transmission of Light through Contemporary Resin Composites

“…Because of their improved mechanical and aesthetic properties, resin composites are the most frequently used materials in restorative dentistry [1,2].…”