Effect of polymerization methods and thermal cycling on color stability of acrylic resin denture teeth

Effect of Cigarette Smoke on Acrylic Resin Teeth

“…Also, there is a good amount of literature which have reported staining which was caused by food colourants, like staining of artificial teeth [9,10], aesthetic restorative materials [11,12], denture base resin [13] and acrylic resins for provisional restoration [14]. Some authors had evaluated colour stabilities of denture teeth as was affected by both polymerization methods and thermal cycling [15].…”

“…According to Coresta Recommended Method N° 22 6 , standard conditions which were used were as follows:- To detect colour change, instrumental techniques are preferred, as they eliminate the subjective interpretation [9,15,18,19]. Among them, spectrophotometers are preferred, as they can generally provide more systematic, reliable and precise measurements [15].…”

“…Among them, spectrophotometers are preferred, as they can generally provide more systematic, reliable and precise measurements [15]. On the downside, this approach has some disadvantages.…”

“…This colour system has a meaningful correlation with the visual perception and clinical significance of colour differences [9,15,21]. Thus, CIELAB measurements evaluate the colour of each specimen at a given time and they also enable the calculation of the amount of colour change (∆E) between two time intervals by using a formula:…”

“…In dentistry, a discolouration that is more than visually perceptible (∆E > 1.0) [10] will be referred to as clinically acceptable, up to the E value of 3.3 [5,15,23,24]. A discolouration which is above this level is referred to as unacceptable in subjective visual evaluations [23].…”