Effect of crown-to-implant ratio on peri-implant stress: a finite element analysis.

摘要: Abstract The aim of this study was to evaluate stress distribution in the fixation screws and bone tissue around implants single-implant supported prostheses with crowns different heights (10, 12.5, 15 mm — crown-to-implant ratio 1:1, 1.25:1, 1.5:1, respectively). It designed using three 3-D models. Each model developed a mandibular segment block including an internal hexagon implant supporting screw-retained, single metal-ceramic crown. crown height set at 10, respectively. applied forces were 200 N (axial) 100 N (oblique). increase showed differences oblique load some situations. By von Mises' criterion, high area concentrated implant/fixation screw abutment/implant interfaces Using maximum principal criteria, buccal regions higher traction intensity, whereas distal largest compressive all C/I must be carefully evaluated by dentist since is proportional average for both (C/I 1:1 1:1.25 ratio = 30.1% 1:1.5 ratio = 46.3%) ratio = 30% ratio = 51.5%).