Patent ID: 9688023
Date: 2017-06-27
CPC Classifications: A61L,B29C,B33Y,G02B

Claim:
1. A method of manufacturing a tissue engineering scaffold for implantation in a patient and promoting tissue growth, the method comprising: receiving data representing at least the tissue engineering scaffold at a Digital Light Processing (DLP) additive manufacturing apparatus including a Digital Micromirror Device (DMD); actuating the DMD to project light corresponding to layers of the scaffold onto a transparent or translucent plate above which is disposed a build plate and a biocompatible resin including a liquid light-polymerizable material that is resorbable after polymerization, wherein the resin includes a dye and an initiator; shifting the build plate at selected increments such that the projected light sequentially causes portions of the resin to at least partially polymerize to substantially resemble the layers of the scaffold; and controlling depth of penetration of the projected light by selecting the ratio of the dye to the initiator in the biocompatible resin so that the projected light overcures a previously at least partially polymerized layer, wherein the ratio of dye to initiator is selected to control light penetration such that overcuring of at least one previously rendered layer is in a range between 10% and 300% of layer thickness.