Effect of artificial saliva on the mechanical properties of a polymer material reinforced with fiber, used in esthetic tooth restorations.

Background: The oral environment can negatively affect the physical properties of fiber-reinforced composite (FRC) materials, which can lead to the deterioration of mechanical stability and reduce the span of their clinical usefulness.

Objectives: The aim of this study was to determine the influence of artificial saliva on the selected mechanical properties of FRC.

Material And Methods: The core of the polymer material selected for the study was a bundle of ultrahighmolecular-weight polyethylene (UHMWPE) fibers.

The Physicochemical Characteristics of Prosthetic Materials and Their Influence on Their Clinical Properties.

The use of elastic materials favours degradation of their surface. The period of their clinical usefulness is then shortened, and their further utilisation in the oral cavity may have the reverse effect. The surface properties of such material as well as the influence of the humidity on their surface are very important as they determine the prosthetic materials behavior in the mouth.

The oral cavity - potential source of stem cells.

The purpose of this review is to present the current knowledge regarding the hierarchy of stem cells originating from the oral cavity, which could have a potential value when applied to regenerative stomatology. It must be particularly emphasized that the heterogenous nature of its biology and function within oral compartment may predispose them to different types of applications. Stem cells can be perceived as immature, primitive and unspecialized types of cells with the ability to proliferate, self-renew and differentiate into specialized progeny according to the compartmental signaling.

An in-needle extraction technique in determination of organic compounds released from dental tissue conditioners incubated in artificial saliva.

The use of an in-needle technique for direct isolation of analytes from real liquid samples is a new proposal. The in-needle technique has been relatively seldom used for direct sampling of liquid matrix through the needle. In this work the in-needle technique has been applied for the determination of compounds evolved to artificial saliva from dental prosthetic materials.

Effect of denture cleansers on chemical and mechanical behavior of selected soft lining materials.

Objectives: The aim of this investigation was to determine the effect of storage in disinfectants and artificial saliva on a series of commercial soft lining materials for dentures. Changes in mechanical properties and the nature of chemicals released into these solutions were studied.

Methods: Four soft lining materials were studied (Vertex Soft® and Villacryl Soft®, both of which are plasticized acrylics; Molloplast B® and Mollosil®, both of which are silicone elastomers).

The influence of denture cleansers on the release of organic compounds from soft lining materials.

Biocompatibility constitutes the most fundamental requirement with respect to all dental materials to be applied within the oral cavity. In its environment, various toxic compounds may be released by dental materials which pose potential threats to the patient's health. Due to the fact that dentures remain in the oral cavity for a very long time, a detailed examination and verification of prosthetic materials with a view to their toxicity seems to be essential.