Cast partial dentures with metal clasps are usually designed with casting clasps, but cocr partial dentures with clasps can also be designed with tooth color clasp for better esthetic. The Benefits of Printed Partial Framework - Co-Cr & Acrylic Partial Denture (Color Clasp) Aesthetics plays a vital role in the success of partial dentures. The metal cast partial clasps can hold the denture firmly in place, but sometimes these clasps can give the dentures away when the smile makes it plain to see the metal. To avoid such embarrassing situation, tooth color clasp (acetal clasp) is a better choice to make the clasps discreet. For more information about outsourcing dental lab, please feel free to contact us!