Process of making a dental blank

摘要

A dental blank has at least an inner zone (or layer) of a first color and an outer zone (or layer) of a second color, wherein the inner and outer zones are concentric. The inner zone can be surrounded in its entirety by the outer zone such that only the outer zone is visible on all surfaces of the blank. Alternatively, the inner zone and the outer zone can extend to a same single surface of the blank, such that only the outer zone covers all remaining surfaces. The blank may also have an intermediate zone between the inner and outer zones. A method of fabrication includes solid free form processes, such as robocasting, laser sintering and 3D printing that allow for placement of multiple colors. A dental restoration made from the blank can have a variety of shades depending on a ratio of milled outer layers to internal layers.

主权项

1. A method of manufacturing a dental blank, comprising:
forming at least an inner zone of a first color and an outer zone of a second color, wherein the inner and outer zones are concentric, and the dental blank has a geometric shape, wherein the inner zone is surrounded in its entirety by the outer zone such that only the outer zone is visible on all surfaces of the blank and the inner zone is not visible on any surface of the blank, wherein each zone has generally the same geometric shape, and wherein the blank has multiple outer surfaces, each of which has a resulting color that is of a combination of at least the first color of the inner zone and the second color of the outer zone; using a first material for the first color; using a second material for the second color; and switching between the first material and the second material at a border between the inner zone and the outer zone.