Objectives: Two acrylic resin splinted techniques used for direct implant impression were assessed for accuracy in a laboratory model that simulated clinical practice. Methods: Two external hex cylinder implants (Master Screw - Conexão, Brazil) were embedded in the center of a polyurethane block. Microunit abutments (Conexão, Brazil) were placed on the implants. Sixteen samples were fabricated on this model, using two square transfer copings rigidly connected to each other with autopolymerizing acrylic resin (Dencrilay Speed, Brazil). Half the samples formed group 1 (n=8). For group 02 the other half (n=8) was stored at ambient conditions for 24 hours; then, the acrylic resin splint was sectioned in this group, and the segments were reconnected. Three strain measurements for each sample were performed by four strain gauges placed on the superior surface of the polyurethane block. For group 1, measurements were made three hours after the initial polymerization of the acrylic resin splint. For group 2 measurements were made three hours after the segments were reconnected. Results: Student's t-test for independent samples, with statistical significance at 5%, was applied to analyze the data. Significant difference (p< .05) was found between the 2 techniques. The 1-piece acrylic resin splinted technique (G1) produced significantly higher strain values (143.25 ±53.48microstrain) than the other technique (G2/ 70.83 ±29.03microstrain). Conclusion: It was concluded that the acrylic resin splinted technique with separation and reconnection after 24 hours was significantly more accurate than the 1-piece acrylic resin splinted technique.

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