OBJECTIVE The objective was to investigate the effect of silver nanoparticles (AgNPs) incorporation on viscoelastic properties of acrylic resin denture base material. MATERIALS AND METHODS A total of 20 specimens (60 × 10 × 2 mm) of heat cured acrylic resin were constructed and divided into four groups (five for each), according to the concentration of AgNPs (1%, 2%, and 5% vol.) which incorp...

Background and objectives : The fracture of acrylic maxillary complete dentures is a commonly seen clinical problem which usually occurs due to heavy occlusal forces or accidental damage.The objectives of the study were to measure the impact strength of maxillary complete dentures fabricated with high impact acrylic resin and to evaluate the effect of woven E-glass fiber and silane treated glas...

Denture stomatitis is a very common disease affecting the oral mucosa of denture wearers. The aim of this study was to measure the antifungal effect of henna against Candida albicans adhered to acrylic resin as a possible method for prevention of denture stomatitis. One-hundred-eighty acrylic plates were prepared of heat-cured acrylic denture resin. The specimens were divided into six groups of...

Aim: The aim of this study was to evaluate the influence of acrylic resin immersion in different mouthwashes on hardness, roughness and color. Methods: Specimens of an orthodontic selfcured acrylic resin (Orto Clas®) were produced and immersed in five mouthwashes: Plax® Classic (Colgate®); Plax® alcohol-free (Colgate®); Listerine® (Johnson & Johnson®); Periogard® (Colgate®) and Periogard® alcoh...

Objective This in vitro study evaluated the disinfection action of peracetic acid on chemically activated acrylic resin. Methods Sixty chemically activated acrylic resin specimens were contaminated with Candida albicans (30) and Bacillus subtilis (30) for 15 minutes. Next, specimens were divided into Control Group (Group 0) and Test Group (T) for each studied microorganism. The antimicrobial ef...

The wear resistance of denture teeth is important for the longevity of removable prostheses of edentulous patients. The ability of denture teeth to maintain maximum intercuspation at centric jaw relation position, masticatory efficiency, the occlusal vertical dimension, and occlusal stability over time may be influenced by this property. Inferior wear resistance of acrylic resin artificial teet...

This paper concerns the shape theory for triads of spaces which was introduced by the author. More precisely, in the first part, the shape dimension for triads of spaces (X; X0,X1) is introduced, and its upper and lower bounds are given in terms of the shape dimensions of X0, X1, X0 ∩ X1 and X. In the second part, a Whitehead type theorem for triads of spaces and a Mayer-Vietoris type theorem c...

In the first experiment, a continuum of 10 harmonic musical intervals was constructed from a minor to a major third. Four pairs of stimuli with constant physical distances were presented to seven musicians in a two-interval forced-choice discrimination task. Either silence, an interfering tone, or a noise burst was interposed between the two stimuli in a pair. Unbiased discriminability was foun...

PURPOSE This study explores how highly correlated time variables (occupational cohort time scales) contribute to confounding and ambiguity of interpretation. METHODS Occupational cohort time scales were identified and organized through simple equations of three time scales (relational triads) and the connections between these triads (time scale web). The behavior of the time scales was examin...