Ceramic micro-stereolithography (mSL) was recently introduced in the fabrication of complex 3D ceramic microstructures. Light scattering is found as an important factor in the mSL of ceramics. In this work, the Monte Carlo ray tracing method is employed to investigate the in¯uences of the important materials properties on the scattering during the ceramic mSL. It is found that the scattering is...

Most transposons display target site selectivity, inserting preferentially into sites that contain particular features. The bacterial transposon Tn7 possesses the unusual ability to recognize two different classes of target sites. Tn7 inserts into these classes of target sites through two transposition pathways mediated by different combinations of the five Tn7-encoded transposition proteins. I...

OBJECTIVE To determine the resistance failure value of nonprecious metal-ceramic restorations at the incisal edge with varying thickness under different application of load. MATERIALS AND METHODS An Ivorian central incisor was prepared to receive metal-ceramic crown, which was further duplicated, invested, casted and 72 metal dies were fabricated in Co-Cr alloy. Metal dies were relieved with ...

INTRODUCTION It is known that a well-fixed stem can be left in situ when only the acetabular component and femoral head have to be changed. However, in a revision case, the use of a ceramic head on an existing taper is not recommended. Slight damages of the taper may increase the risk of a ceramic fracture. Until now in a revision case a primary ceramic-on-ceramic or ceramic-on-polyethylene pai...

In this study, 3-D finite element modeling of precision hard turning has been used to investigate the effects of cutting edge microgeometry on tool forces, temperatures and stresses in machining of AISI H13 steel using polycrystalline cubic boron nitrite (PCBN) inserts with two distinct edge preparations. Hard turning experiments were conducted to investigate the effects of cutting edge geometr...

The "RapidTool" Short Run (SR) Tooling Process using the Copper Polyamide material provides a route to mold inserts for injection molding made directly in the Selective Laser Sintering machine. The STL files for the mold inserts are shelled and conformal cooling lines and ejector pin guides are added before SLS processing. Sintering of the material in the SLS machine provides quick metal/plasti...

Rescue operations in mountain areas, lasting many hours, pose a mental and physical burden on the rescuer’s body. In addition, they cause thermal discomfort associated with variable energy expenditures high variability of weather conditions. One solutions for improving comfort work rescuers is clothing an active heating function. This paper discusses technology manufacturing flexible inserts st...

Study Design Systematic review. Objective Ceramic-based bone grafts have been widely utilized to reduce the need for iliac crest bone grafting given the complications associated with the harvest of iliac crest autograft. As a family, ceramics vary widely based on differences in composition, manufacturing, porosity, and structure, which may ultimately affect their efficacy. This article reviews ...

Lightweight ceramic-metal combinations are one option for advanced vehicle and other structural applications. These structures can require the fabrication of large area arrays of ceramic tiles on a metallic backing. However, the process of fabricating a combination of lightweight ceramics and metals is complicated by the need to bond these very dissimilar materials together. For severe applicat...