A study is made of fracture from cyclic loading of WC spheres on the top surfaces of thick (1 mm) brittle layers on polymeric substrates, as representative of repetitive occlusal contact on dental crown structures. The advantage of glass layers is that internal cracks can be followed in situ during the entire cyclic loading process. The glass surfaces are first given a surface-abrasion treatmen...

UNLABELLED In restorative dentistry direct composite resin materials can be used to conservatively resolve many esthetic problems. Opaque resins are often necessary to mask discolorations and/or dark backgrounds when restoring anterior teeth. This article presents a direct composite resin veneer technique using opaquers. Potential problems with the tone of restorations after the use of opaquers...

Knowledge of internal defects within hardwood logs can be useful even prior to a log's entry into the sawmill. It is in the log yard where the first important decisions are made about processing. First, based upon perceived quality, logs may be sorted as veneer logs or as high-quality sawlogs and sold to domestic veneer mills or for export . Second, roundwood may be bucked into smaller logs to ...

This study aimed to investigate the suitability of interlaminar shear (ILS) testing method for veneer-based composites. The ILS is an established composite materials as a qualitative evaluation adhesion within composite. applicability this veneer based composites enables simple statement on individual layers. complements existing wood-based material tests that focus bonding, using significantly...

Plywood manufactured from thin veneer sheets of different species is one of the most traditional structural composite panels. The objective of this study was to produce experimental plywood panels using a temperature of 100 °C, which is 10 to 30% lower than typical press temperature of plywood manufacture. It was determined that shear strength characteristics of the samples were not adversely i...

Ukrainian companies mainly use birch in the manufacture of plywood, but species, such as black alder, are not yet widely used plywood due to their poorer properties. It is well known that thermal compression often improve properties solid wood. Good lay-up schemes veneer can maximize advantages and minimize disadvantages these wood generally utility value plywood. This research aimed develop pa...

OBJECTIVES The aims of this study were to test whether the bond strength of a hybrid composite and a PMMA-based veneer to CAD/CAM polymers would improve after pre-treatment and to evaluate the failure types after debonding. MATERIALS AND METHODS Three types of PMMA-based (CAD-Temp, artBloc Temp and TelioCAD) CAD/CAM blocks were obtained (N = 360, n = 15 per test group). They were divided into...

Background: The need for dental esthetics is very important in recent years. Fulfilling aesthetic demands with both non-invasive and minimally invasive techniques can maintain tissue continuity. A 38 year old female patient came to the clinic an esthetic complaint of maxillary anterior teeth. following case report describes a step by complex treatment multiple caries. Appealing results will res...