Methods
The tested Armamentarium used in this study are: Celluloid matrix (for the control group) which is transparent strip (TOR VM, Russia) with 8 mm width, 95 mm length, and 0.05 mm thickness and Bioclear matrix black triangle kit (for the intervention group) consisting of Black Triangle Matrix Series (Bioclear matrix. USA) of color-coded matrices that close space up to 2.5 mm, true contact saw and sanders, black triangle gauge, and bioclear dual-color disclosing solution for both groups.