Lost-wax or laser sintering? Findings on marginal and internal adaptation of metallic copings

Marginal and internal adaptation are parameters of crucial importance to the success prosthetic crowns. Automatized process creates an expectative superior or equivalent results compared restorations manufactured ​​by conventional lost-wax technique. The purpose this study was evaluate marginal (cement space) metal-ceramic crown copings produced by (LW) direct metal laser sintering (DMLS) techniques. An artificial lower first molar prepared for a full crown, duplicated in plaster scanned. Twenty were fabricated cobalt-chromium two techniques (n=10). filled with low viscosity silicone seated on tooth, resulting replica space. pellicle formed embedded heavy body silicone, sectioned captured means stereomicroscope at 50x magnification, according technique (RT). Shapiro-Wilk test followed Holm-Sidak used statistical analysis (α=.05). presented no difference between LW (101.5 ± 41.6) DMLS (86.3 39.9) groups (p=0.24). Conventional showed significantly occlusal (p<0.008) axial spaces (p<0.03). Measurements all regions numerically larger values than that defined during design​​ group. Both within clinically acceptable.