The Palo dent System employs a spring steel Bigtime ring and sectional matrices for placement of restorations in the posterior region. Sectional matrices are available in three sizes suitable for use with all posterior restorative materials. Bigtime rings are available in round and oval or elongated shapes suitable for use in the posterior region either singly or in tandem. The advantages of the sectional matrices and rings include natural contours for better control of contact areas and embrasures, ease of placement, better visualization of the operative field, and more comfort for the practitioner and patient. Eliminating the leverage of a conventional matrix retainer allows the practitioner to use less tension, avoiding excessive compression of tooth and easier formation of anatomical proximal contact areas.