Perfactory vida

An arch-shaped master model to simulate the mandibular arch (14 mm in height and 16 mm in width) was designed with CAD software (RapidForm XOR2; 3D Systems). Six abutments with a 6º total angle of convergence and 1 mm at the circumferential shoulder finish lines were produced to resemble prepared teeth (right mandibular second molar, right mandibular second premolar, right mandibular canine, left mandibular canine, left mandibular second premolar, and left mandibular second molar) with a height of 10.15 mm placed on the arch . Cross marks were added at the middle of each abutment's occlusal surface and were used as reference points to allow measurements of the X, Y, and Z coordinates.
Then, the digital master model (DMM) was saved in Standard Tessellation Language (.stl) format and transferred to each of the 3D printers. Ten models were manufactured by each printer using three different printing technologies: SLA technology (Ultra SP Ortho, envisionTEC), DLP technology (Perfactory Vida, envisionTEC), and Polyjet technology (Objet30 Prime, Stratasys Ltd.) (Fig. 1). A total of 30 models were printed. The technical details of the 3D printers are summarized in Table 1. The printer technology, support materials, postprocess, manufacturing time, and costs are given in Table 2.