title: Evaluation of the accuracy of different transfer impression techniques for multiple implants.
abstract: The aim of this study was to evaluate the accuracy of three implant transfer impression techniques. Four groups (n = 5) were defined, according to the technique: TC - tapered copings without splint; SC - square copings without splint; SCS - square copings splinted with dental floss and acrylic resin, and CG (control group) - master model with four external hexagonal implants and a superstructure. Individual trays and polyether were used for the impression. All casts were checked for their fit into the master superstructure; for this, all four screws were placed in the implants. Digital photos were taken and images were analyzed using UTHSCSA ImageTool software. Statistical analyses were performed using one-way analysis of variance and Student's t test (p < 0.05). The means and standard deviation were (µm): CG = 2.03 ± 0.00, TC = 14.74 ± 3.41, SC = 12.08 ± 2.56, and SCS = 6.51 ± 0.09. The control group was found to be statistically different from the TC and SC groups. Within the limitations of this study, all groups presented clinically acceptable standard gap values, and the SCS group showed no statistical difference in relation to the CG (control group), demonstrating more accuracy and fidelity to transfer implants.
authors.affiliation: Department of Prosthodontics, University of Taubaté, Taubaté, SP, Brazil.
authors.forename: Júlio César Brigolini de
authors.initials: JC
authors.lastname: Faria
authors.forename: Laís Regiane
authors.initials: LR
authors.lastname: Silva-Concílio
authors.forename: Ana Christina Claro
authors.initials: AC
authors.lastname: Neves
authors.forename: Milton Edson
authors.initials: ME
authors.lastname: Miranda
authors.forename: Marcelo Lucchesi
authors.initials: ML
authors.lastname: Teixeira
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D003735:Dental Casting Technique; D003757:Dental Implantation / Q000379:methods; D003760:Dental Impression Materials; D003761:Dental Impression Technique; D019094:Dental Prosthesis, Implant-Supported / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008422:Materials Testing; D003765:Models, Dental; D015203:Reproducibility of Results
chemical_list: D000180:Acrylic Resins; D003760:Dental Impression Materials