| dc.description.abstract | Introduction: Nowadays, with the increasing use of dental implants, it seems necessary to use methods that increase the accuracy of work and reduce subsequent problems and bring patient satisfaction. Due to the significant role of precision implantation in the success of implant treatments through the preparation of prostheses with high adaptation and no stress, and also the lack of sufficient studies on the effect of implant angularity on the accuracy of implantation during various implantation methods, the aim of this study was investigating the effect of dental implant angulation on accuracy of different implant impression methods.
Methods and Materials: In this experimental study, 48 moldings (12 for each of the four groups: no splint and parallel, no splint and angled, splinted and parallel, and splinted and angled) were made. For the installation of fixtures in parallel implants, in one of the acrylics, two holes with a diameter of 4.50 and a depth of 12 mm, and in angular implants, in the second acrylic, 2 holes with the same dimensions but each with an angle of 15 degrees to the axis were created vertically and sequentially. For non-splint molding, the open method with Panasil additive silicone material with putty-wash consistency was used as a one-step molding. For splinted molding, the molding material was cut with a razor blade, dural acrylic was poured into the index and set, the index was removed and the steps were continued as without splint molding. Finally, the distance between the innermost parts of the screws on the analog surface was measured by digital caliper . Quantitative normal data were reported as mean±standard deviation. Two-way analysis of variance was used to compare the accuracy between study groups.
Results: In this study, the mean casting accuracy in splinted and non-splinted parallel implants was 0.03±0.03 and 0.08±0.05, respectively, and in angled implanted and non-splinted implants, it was equal to 0.07±0.06 and 0.11±0.07, respectively. In both groups of parallel and angled implants, the accuracy of casting in the splinted method was significantly better than the method without splint (P = 0.003). Also, in both groups of splinted and non-splinted implants, the accuracy of casting in the parallel method was significantly better than the angled method (P = 0.031).
Conclusion: To increase the accuracy of dental implants, it is recommended to use the splinted molding method for both parallel and angled implants when using the open tray method. | en_US |
