Variety pack of TruContact Saws and Sanders. Contact optimization is an essential part of the Bioclear Method. Natural contacts are generally too tight and too rough to allow insertion of a mylar matrix. Bioclear TruContact Saws and Sanders are designed to work in sequence to lighten the contact which then improves the ease of placement of the mylar matrices. As an additional advantage, the TruContact also removes biofilm from the contact.