A dental matrix system enabling back-to-back tooth cavity fillings to be less tedious and more efficient. A wedge attached to a matrix band that is designed to be inserted between two teeth and then expanded into position on opposing sides of a tooth so a ring can be placed. The device is inserted perpendicular to the biting/occlusal surface of the tooth or teeth identified for repair. The folded/bonded band is dropped down between the teeth. The matrix consisting of the matrix band and the end tail section of the wedge is pushed between the teeth. The bond between the two halves of matrix band is broken. The matrix band is folded into an open position. A ring is then placed over the device with the tips of the ring aligned inside the open geometry of the folded matrix band or outside of the matrix band after being folded in.