Excerpt from Dominion Dental Journal, 1904, Vol. 16

The matrix as an aid in restoring contours in the posterior teeth, has become indispensable to the operators of the present day, and why should the usefulness of the principle be overlooked in its application to the successful management of interproximal cavities, and corner restorations in the anterior teeth?

Its advantages are manifest. It restores a missing wall in many cases, and gives the operator something additional to the pulpal wall to build against. The general conformity of the matrix to the shape of the tooth serves as a guide to the contour of the filling to be inserted. It facilitates the condensation of certain points in the filling, often difficult of access, e.g., in an interproxmial filling extending from the labial surface through to the lingual surface; that portion of the filling in the incisal region is often only sufficiently condensed with great difficulty, but where the matrix is employed it is rendered easy of access, and the required force may be applied without fear of dislodgment of the filling. It facilitates the finishing of the filling to a marked degree, inasmuch as the gold against the matrix is smooth, and there is less surplus. It enables the operator to secure a perfectly condensed contact point. Where teeth are loose or tender, whether caused by over-rapid separation or naturally so; it will be found very useful as a means of staying them. In the hands of a careful and thorough operator it will be readily appreciated that operations may be more accurately and rapidly performed. Oftentimes, in emergency cases, fillings may be inserted without separation; but it is not advisable.

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