Effect of a continuous mechanical polishing protocol on the color stainability, microhardness, mass, and surface roughness of denture base acrylic resin.

Statement Of Problem: The acrylic resin used in dental prostheses, which is subject to changes in its properties caused by hygiene chemicals, brushing, and colored beverages, can benefit from mechanical polishing methods. However, studies evaluating whether such procedures can be performed continuously without damaging the prosthetic materials are lacking.

Purpose: The purpose of this in vitro study was to evaluate the effect of a continuous mechanical polishing protocol on the color stainability, surface roughness, microhardness, and mass of a denture base acrylic resin.

Microbiological evaluation of an experimental denture cleanser containing essential oil of .

The antimicrobial activity of an experimental solution containing essential oil of for denture cleaning was evaluated by (1) minimum inhibitory (MIC) and fungicidal/bactericidal concentration (MFC/MBC) tests against , , and ; (2) the metabolic activity of biofilm formed on flat-bottom microplates and denture base specimens based on the reduction of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT); and (3) scanning electron microscopy, to evaluate the fungal biofilm morphology. The solution showed antimicrobial action against the pathogens tested ( - MIC and MFC: 19.53 µg ml, - MIC and MBC: 78.

Effect of a continuous mechanical polishing protocol and toothbrushing on the surface roughness of acrylic resin teeth.

Purpose: To evaluate in vitro the effect of a continuous mechanical polishing protocol, performed in different periods, on the surface roughness of acrylic resin teeth subjected to toothbrushing (Br).

Methods: Artificial acrylic teeth (n=30) were randomly divided into three groups according to the polishing protocol and toothbrushing (Br): Br; Br+Pol15 (Br associated with a biweekly polishing); Br+Pol30 (monthly polishing). Br group was subjected to a total of 89,000 brushing cycles.

Combining different ceramic systems and periodontal microsurgery in maxillary esthetic areas: a case report.

Oral rehabilitations in esthetic regions may be challenging when different prosthodontic modalities must be combined with interventions on gingival tissues to create a harmonious smile for the patient. This case report describes the treatment of a 36-year-old man with an esthetically compromised maxillary anterior region by means of periodontal microsurgery, an implant-supported dental prosthesis, and tooth-supported crowns. Combined esthetic-functional planning based on clinical and radiographic examinations, photographs, and a diagnostic wax-up led to correction of the gingival contour and thickness by means of periodontal microsurgery; customization of an implant-supported zirconia abutment with the application of feldspathic porcelain; fabrication of a lithium disilicate ceramic infrastructure to mask darkened substrate; and fabrication of lithium disilicate ceramic definitive restorations.

Effect of beverage solutions and toothbrushing on the surface roughness, microhardness, and color stainability of a vitreous CAD-CAM lithium disilicate ceramic.

Statement Of Problem: Computer-aided design and computer-aided manufacturing (CAD-CAM) has enhanced the physicomechanical stability of ceramics. However, various factors in the oral cavity may impair the longevity of restorations by negatively affecting their properties. Appropriate surface treatments such as glaze application or mechanical polishing are necessary to diminish these effects.