Results 251 to 260 of about 7,472 (295)

Additive or subtractive manufacturing of crown patterns used for pressing or casting: A trueness analysis [PDF]

Journal of Dentistry, 2022
OBJECTIVES To investigate the effect of subtractive and additive manufacturing techniques on the trueness of crown patterns used for pressing or casting. MATERIAL AND METHODS A complete-coverage mandibular right first molar crown was designed in
Gülce Cakmak, Mustafa Borga Donmez, Martin Schimmel   +2 more
exaly   +2 more sources

Assessment of the trueness of additively manufactured mol3% zirconia crowns at different printing orientations with an industrial and desktop 3D printer compared to subtractive manufacturing

Journal of Dentistry
Objectives This study endeavours to investigate the effect of printing orientation on the trueness of additively manufactured molar zirconia crowns.
Andrew B Cameron, Joanne Jung Eun Choi, Andrew Ip   +2 more
exaly   +2 more sources

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Accuracy of Dynamic Virtual Articulation: Trueness and Precision

Journal of Prosthodontics, 2019
AbstractPurposeTo study the effects of altering condylar settings and pin openings on the trueness and precision of virtual articulators vs. mechanical articulators.Materials and MethodsMaxillary and mandibular typodonts with fiducial markers were mounted on a mechanical Artex‐CR articulator, and the mandibular teeth were prepared to allow guidance ...
Michael R, Hsu, Carl F, Driscoll, Elaine, Romberg, Radi, Masri   +3 more
openaire   +2 more sources

Effect of Milling Protocols on Trueness and Precision of Ceramic Crowns

Journal of Prosthodontics, 2020
AbstractPurposeTo investigate the effect of different milling protocols for different ceramic materials on the trueness and precision of milled ceramic crowns.Materials and MethodsA definitive impression from a patient requiring a ceramic crown was used to fabricate forty glass ceramic crowns (VITABLOCS mark II, Vita Zahnfabrik) milled with wet, hard ...
Khaled Q. Al Hamad, Rama B. Al‐Rashdan, Bashar A. Al‐Rashdan, Nadim Z. Baba   +3 more
openaire   +2 more sources

The effect of software updates on the trueness and precision of intraoral scanners.

Quintessence international (Berlin, Germany : 1985), 2021
The goal of the study was to determine the effects of software updates on the trueness and precision of digital impressions obtained with a variety of intraoral scanner (IOS) systems.Seven IOS systems were investigated. Each system was tested using two versions of software, with the second version being the latest at the time of conducting the study ...
Vág, János, Renne, W, Revell, G, Ludlow, M, Mennito, A, Teich, S T., Gutmacher, Z   +6 more
openaire   +3 more sources

Understanding the meaning of accuracy, trueness and precision

Accreditation and Quality Assurance, 2006
Clear definitions of basic terms, used to describe the quality of measurements, is essential for communication among scientists as well as when reporting measurement results to clients. Even if appropriate definitions are given in international standards and guidelines, the understanding of some basic terms sometimes proves difficult.
Antonio Menditto, Marina Patriarca, Bertil Magnusson   +2 more
openaire   +1 more source

Assuring trueness of analytical results

Fresenius' Journal of Analytical Chemistry, 1994
A true analytical result presumes an analytical procedure without systematic errors. They can be detected by comparing the analytical results with the true value or with an accepted reference. Systematic errors are always superimposed by the random error, therefore such a comparison must include statistical tests.
openaire   +1 more source

Edentulous jaw impression techniques: An in vivo comparison of trueness

The Journal of Prosthetic Dentistry, 2019
Simplified edentulous jaw impression techniques have gained popularity, while their validity has not yet been evaluated.The purpose of this clinical study was to compare the trueness of maxillary edentulous jaw impressions made with irreversible hydrocolloid (ALG), polyvinyl siloxane (PVS), PVS modified with zinc oxide eugenol (ZOE) (PVSM), and an ...
Chebib, Najla, Kalberer, Nicole, Srinivasan, Murali, Maniewicz Wins, Sabrina, Perneger, Thomas, Muller, Frauke   +5 more
openaire   +3 more sources

Clinical Factors Influence the Trueness of Intra-oral Scanning

European Journal of Prosthodontics and Restorative Dentistry, 2019
The aim of this in vitro study was to evaluate the influence of adjacent teeth in the trueness of digital impressions.In this study the first premolar on a typodont mounted in a phantom head was prepared for an all ceramic crown. Three different operators scanned the tooth with an intraoral scanner, with three different clinical scenarios: with no ...
A, Jivanescu, P, Rotar, S, Hategan, C, Pricop, R, Rus, L, Goguta   +5 more
openaire   +2 more sources

Performance of electrolyte measurements assessed by a trueness verification program

Clinical Chemistry and Laboratory Medicine (CCLM), 2016
AbstractIn this study, we analyzed frozen sera with known commutabilities for standardization of serum electrolyte measurements in China.Fresh frozen sera were sent to 187 clinical laboratories in China for measurement of four electrolytes (sodium, potassium, calcium, and magnesium). Target values were assigned by two reference laboratories. Precision (
Menglei, Ge, Haijian, Zhao, Ying, Yan, Tianjiao, Zhang, Jie, Zeng, Weiyan, Zhou, Yufei, Wang, Qinghui, Meng, Chuanbao, Zhang   +8 more
openaire   +2 more sources