Dental crowns.

Design patented by Dr C H Mack. A dowel was attached firmly to a root before the crown was fixed to the tooth. The porcelain cavity was filled with plastic, which anchored the tooth when mounted. (Fig. 5) The gold shell or telescope tooth crown, patented by Dr W N Morrison was fixed to the natural tooth. (Fig. 6) Page 4, 'Principles and practice of crowning teeth : a practical, systematic and modern treatise upon the requirements and technique of artificial crown work, including some incidental reference to bridgework' by Hart John Goslee, 1903.