Results 141 to 150 of about 250,447 (236)

Coordinating VATs Between EU Member States [PDF]

The paper surveys the characteristics of the common European VAT system, proposed by the EU-Commission to overcome the weaknesses of the transitional European VAT system, which was enacted in 1993 and is still in force.
Bernd Genser
core  

The Collection Efficiency of the Value Added Tax: Theory and International Evidence [PDF]

This paper evaluates the political economy and structural factors explaining the collection efficiency of the Value Added Tax [VAT]. We consider the case where the collection efficiency is determined by the probability of audit and by the penalty on ...
Yothin Jinjarak, Joshua Aizenman
core  

Programmable Porosity in Polymers via Microfluidic Templating and 3D Printing

Small Methods, EarlyView.
Fluid templating is a powerful way to produce porous polymers. Microfluidic technologies enable fine control over the dimension and packing of bubbles and droplets. Combined with additive manufacturing, microfluidic templating enables the creation of polymeric functionally graded porous materials in which both porosity and three‐dimensional geometry ...
Federico Serpe, Roberta Angelini, Andrea Barbetta, Vanessa Rosciardi   +3 more
wiley   +1 more source

Impact Absorption on 3D Printed Mouthguard Material in Selected Printing Angulations

Dental Traumatology, EarlyView.
ABSTRACT Background Sports‐related oral and craniofacial injuries are significant public health problems, and one‐third of these injuries result from sports activities. These injuries affect the quality of life and performance of athletes. Sports mouthguards are recommended to mitigate these injuries.
Siti Salwa Idris, Hiroshi Churei, Chenyuan Li, Thida Aung, Si Thu Kaung, Qiushuang Zhu, Esha Ishrat Jahan   +6 more
wiley   +1 more source

Assessment of Different Technologies in the Fabrication of 3D Printed Tooth Models for Dental Education

European Journal of Dental Education, EarlyView.
ABSTRACT Background 3D printing has emerged as a practical method for fabricating customisable, accurate and affordable dental training models. Numerous 3D printing technologies exist, though there is no standardised comparison to inform their implementation in dental education.
Samuel Bereza, Danilo Carluccio, James Novak, Darius Khadembaschi, Martin Batstone, Saso Ivanovski   +5 more
wiley   +1 more source

Tactile Perception of 3D‐Printed Typodont Materials in Dental Education: A Systematic Review

European Journal of Dental Education, EarlyView.
ABSTRACT Background Adoption of additive manufacture of printed typodonts within dentistry for education occurs despite inadequate reproduction of desirable tactile characteristics of human tooth tissues. Variable findings regarding material properties and educational outcomes of 3D‐printed typodonts are reported.
Alice M. G. Cheadle, Reece Bushell, William M. Palin, Phillip L. Tomson, Zehra Yonel, Mohammed A. Hadis   +5 more
wiley   +1 more source

Optimizing diphenyl(2,4,6‐trimethylbenzoyl)phosphine oxide concentration and post‐curing time to balance mechanical properties and color stability in a three‐dimensional‐printed restorative resin

European Journal of Oral Sciences, EarlyView.
Abstract Three‐dimensional (3D) printing is widely used in dental restorations; however, optimization of photoinitiator concentration and post‐curing protocols remains critical to achieve a balance between mechanical and esthetic performance. This study evaluated the combined effect of diphenyl(2,4,6‐trimethylbenzoyl)phosphine oxide (TPO) concentration
Eloah Nunes de Almeida, Vinicius da Nóbrega Marques, Ido Luiz de Azevedo Feiten, André Luis Faria‐e‐Silva, Larissa Maria Cavalcante, Luis Felipe Schneider   +5 more
wiley   +1 more source

Effect of Different Surface Treatments and Manufacturing Methods on the Shear Bond Strength of Repaired Resin‐Based Restorations

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective The aim of this in vitro study was to evaluate the effects of different surface treatments on the shear bond strength of repaired milled and 3D‐printed resin restorations. Materials and Methods A total of 84 resin specimens (8 mm diameter, 5 mm height) fabricated using two different methods such as milling (Grandio Disc) and 3D ...
Berkman Albayrak, Sarp Kocaer, Sina Saygılı   +2 more
wiley   +1 more source

Diet‐Induced Chromogenic Challenge Model for Additively Manufactured Tooth‐Colored Dental Resin Materials

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives This study aimed to evaluate the color stability of glaze‐coated 3D‐printed resin materials stored in different nutritionally beneficial smoothies that are commonly consumed. Methods Disc‐shaped (27 × 1 mm) specimens were fabricated from tooth‐colored 3D‐printed dental resins with different indications: Arma Resin (Group A ...
Ülkü Tuğba Kalyoncuoğlu, Bengi Yilmaz Erdemli, Simel Ayyildiz   +2 more
wiley   +1 more source

Influence of the post‐processing protocol on a biocompatible 3D‐printed resin

Journal of Prosthodontics, EarlyView.
Abstract Purpose This study aimed to evaluate the cytotoxicity of a biocompatible 3D‐printed resin material for occlusal devices after post‐processing with two different high‐intensity UV‐polymerization devices and two rinsing solvents, in the presence of human gingival fibroblasts (HGFs).
Sergio López‐García, Miguel Ramón Pecci‐Lloret, María Pilar Pecci‐Lloret, David García‐Bernal, Ricardo Elías Oñate‐Sánchez   +4 more
wiley   +1 more source