51 research outputs found
The Colors of Mixtures of Dental Opaque Porcelains
The colors of mixtures of dental opaque porcelains and modifiers were measured with use of the CIE L*a * b* uniform color space. Mixtures of dental porcelains were tested to duplicate the range of human tooth colors. Vertical movements in the yellow and blue directions were obtained. Horizontal movements in the red and green directions were achieved. Reflectance measurements were made with use of a spectrophotometer with an integrating sphere. Spectrophotometer measurements were converted to absolute reflectance and then used to calculate CIE a* b* values for a 2° standard observer and for illuminant C. Movements in the yellow, red, blue, and green directions for adequate simulation of the tooth color range can be demonstrated with use of dental opaque and modifier porcelains.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67312/2/10.1177_00220345890680090601.pd
Supported gold catalysts for selective hydrogenation of 1,3-butadiene in the presence of an excess of alkenes
Utilização da vitamina D3 e seus metabólitos na alimentação de frangos de corte sobre parâmetros imunológicos e morfometria intestinal
Vitamin D Deficiency in Egyptian Systemic Lupus Erythematosus Patients: How Prevalent and Does it Impact Disease Activity?
MBSJ MCC Young Scientist Award 2012 Liver regeneration: a unique and flexible reaction depending on the type of injury
Vitamin D improves corticosteroid efficacy and attenuates its side-effects in an animal model of asthma
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