title: Effect of splinting in accuracy of two implant impression techniques.
abstract: Because there is no consensus in the literature about the need for a splint between copings, the aim of this study was to evaluate, in vitro, the accuracy of 2 impression techniques for implant-supported prostheses. A master cast was fabricated with four parallel implant abutment analogs and a passive framework. Two groups with 5 casts each were formed: Group 1 (squared impression copings with no splint: S) and Group 2 (splinted squared impression copings, using metal drill burs and Pattern resin: SS). The impression material used was polyvinyl siloxane with open trays for standard preparation of the casts. For each cast, the framework was positioned, and a titanium screw was tightened with 10 N·cm torque in analog A, after which measurements of the abutment-framework interface gaps were performed at analogs C and D. This process was repeated for analog D. These measurements were analyzed using software. A one-way analysis of variance (ANOVA) with a confidence interval of 95% was used to analyze the data. Significant differences were detected between S and SS in relation to the master cast (P ≤ 0.05). The median values of the abutment-framework interface gaps were as follows: master cast: 39.64 μm; squared impression copings with no splint: 205.86 μm; splinted squared impression copings: 99.19 μm. Under the limitations of this study, the technique presented for Group 2 produces better results compared with the technique used for Group 1.
authors.affiliation: 1  Department of Dental Materials and Prosthodontics, Araraquara Dental School Univ Estadual Paulista (UNESP), Araraquara SP, Brazil.
authors.forename: Erica Dorigatti
authors.initials: ED
authors.lastname: de Avila
authors.forename: Fernanda
authors.initials: F
authors.lastname: de Matos Moraes
authors.forename: Sabrina Maria
authors.initials: SM
authors.lastname: Castanharo
authors.forename: Marcelo Antonialli
authors.initials: MA
authors.lastname: Del'Acqua
authors.forename: Francisco
authors.initials: F
authors.lastname: de Assis Mollo
mesh_terms: D000044:Dental Abutments; D059605:Dental Implant-Abutment Design; D015921:Dental Implants; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique / Q000295:instrumentation / Q000592:standards*; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry; D019094:Dental Prosthesis, Implant-Supported; D006801:Humans; D008422:Materials Testing; D011145:Polyvinyls / Q000737:chemistry; D015203:Reproducibility of Results; D012833:Siloxanes / Q000737:chemistry; D013165:Splints; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
chemical_list: D015921:Dental Implants; D003760:Dental Impression Materials; D003764:Dental Materials; D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane; D014025:Titanium
keywords: dental implants; dental material; impression materials; impression techniques; splinting material