Objective To apply rapid prototyping(RP) technology on pre-fabricating nasoalveolar molding(NAM)appliances, and compare clinical outcomes and complications with traditional NAM appliances. Methods Between June 2014 and September 2016, 39 children with unilateral cleft lip and palate were included in study. Seventeen children(test group) had received novel NAM protocol by pre-fabricating NAM appliances using RP technology, and the other 22 children(control group) had received traditional NAM protocol. There ...