[Investigation of the function of the glass colorant on the machinable infiltrated ceramics color].
OBJECTIVE
To investigae the function of the glass colorant on the color of the machinable infiltrated ceramics(MIC).


METHODS
Five kinds of glass with different colorant were infiltrated through the aluminous matrix by heating the components to 1 100 degrees C for 2 hours. The specimens surface was polished, and their thickness was 0.5 mm.


RESULTS
The refractive index of the MIC infiltration glass was 1.59691 (587.6 nm, nd) . The most different parameter of the MIC color were L*, then a*, and b* had little difference . The parameters of the color space of MIC were: L*(64.55-71.46), a*(3.35-7.38), b*(10.00-12.41), Ca*b*(11.38-13.95), ha*b*(54.07-73.00). These were almost close to the color parameters of Vita In-ceram.


CONCLUSIONS
This experiment proved that the glass colorant was changed the MIC color parameters, and the main function was on L*, then a*. The ceramic color was up to the requirement of clinic.
Yang
Xiao-Yu
XY
Key. Laboratory of Oral Biomedical Engineering Ministry of Education, Sichuan University, Chengdu 610041, China.
Liu
Chang-Hong
CH
Liao
Yun-Mao
YM
Xian
Su-Qin
SQ
Gao
Wen-Feng
WF
D000537:Aluminum Oxide; D002516:Ceramics; D003116:Color; D003764:Dental Materials; D003776:Dental Porcelain; D005898:Glass; D006801:Humans
D003764:Dental Materials; D003776:Dental Porcelain; C070870:In-Ceram; D000537:Aluminum Oxide