Maximat Plus is a universal system for placing and tightening steel or transparent plastic matrices in the posterior region. Thanks to Maximat Plus, conventional retainers are no longer needed. The procedure is very simple and quick: the matrix, once positioned on the tooth, can be tightened with just one hand. After fixing the matrix in place, the tightening instrument shall be removed. Furthermore, during treatment, only the spool remains in the mouth, ensuring better visibility of the area during filling and light curing. Maximat Plus eliminates the leverage effect and consequent distortion of the proximal surfaces that come with conventional retainers, thus allowing the restoration of precise and anatomically correct contact points. Several fillings can be placed simultaneously in the same quadrant.