IADR Abstract Archives
Effect of Implant Placement Angulation and Splinted and Non-splinted Impression Techniques on the Accuracy of Impressions in Two Implant Systems
Objectives: This study was to an in vitro evaluation of assessing effect of implant angulation and impression technique on the accuracy of implant impressions.
Methods: In this experimental trial, 1 stainless steel master casts were fabricated in the form of dental arch. Four DIO implant analogues were placed on master model paralleling each other or with the angulations of 15 and 25 degrees. Impressions were made with custom tray and open tray techniques using additional silicon impression material with the splinted copings and non-splinted copings prior to impression making. The final impressions were poured using stone gypsum. The dimensions of implants on the master model and fabricated casts were compared using coordinate measuring machine with 1 micron exactness. The data were subjected to three-factor analysis of variance and Tukey post-hoc tests
Results: The mean dimensional accuracies in non-splinted+DIOand splinted+DIO techniques were -0.71, -0.54 in the base pin respectively-0.93, -0.49 in the parallel pin; 4.46, 1.81 in the 15° pin and -3.89, -1.6 in the 25° pin. Different values of impression accuracies were noted regarding implant angulation and impression technique. The least distances from the parallel pins were observed using splinted copings while angulated implants showed lower accuracy values.
Conclusions: The most dimensional accuracies were noted in the splinted copings using 3i implant system while impression errors were higher in angulated implants than parallel implants. Although more time-consuming; splinted open tray technique are recommended for clinical impression making in implant restorations.
Methods: In this experimental trial, 1 stainless steel master casts were fabricated in the form of dental arch. Four DIO implant analogues were placed on master model paralleling each other or with the angulations of 15 and 25 degrees. Impressions were made with custom tray and open tray techniques using additional silicon impression material with the splinted copings and non-splinted copings prior to impression making. The final impressions were poured using stone gypsum. The dimensions of implants on the master model and fabricated casts were compared using coordinate measuring machine with 1 micron exactness. The data were subjected to three-factor analysis of variance and Tukey post-hoc tests
Results: The mean dimensional accuracies in non-splinted+DIOand splinted+DIO techniques were -0.71, -0.54 in the base pin respectively-0.93, -0.49 in the parallel pin; 4.46, 1.81 in the 15° pin and -3.89, -1.6 in the 25° pin. Different values of impression accuracies were noted regarding implant angulation and impression technique. The least distances from the parallel pins were observed using splinted copings while angulated implants showed lower accuracy values.
Conclusions: The most dimensional accuracies were noted in the splinted copings using 3i implant system while impression errors were higher in angulated implants than parallel implants. Although more time-consuming; splinted open tray technique are recommended for clinical impression making in implant restorations.