title: Impression techniques for multiple implants: a photoelastic analysis. Part I: comparison of three direct methods.
abstract: The purpose of this article was to compare through photoelastic analysis the stress distribution in 3 direct transfer techniques for implants with splinting. Three photoelastic resin blocks were made with 2 implants placed parallel to each other and 2 square transfer copings splinted. Both transfers were splinted with acrylic resin chemically activated in 3 different techniques: metallic sticks (T1), prefabricated acrylic bars (T2), or dental floss (T3). A circular polariscope was used, and the distortion energy (E) was calculated in 4 periods: 20 minutes and 3, 24, and 36 hours. Statistically significant differences were found among the 3 techniques (P < .05). The dental floss presented the greatest distortion energy values (T3 = 0.469 Kgf/mm(2)) and the metallic sticks the lowest values (T1 = 0.0 Kgf/mm(2)). Thus, the metallic sticks technique (T1) appears to be the most accurate protocol to be used for implant-supported prosthesis with multiple abutments.
authors: Faculty of Dentistry, Federal University of Uberlandia, Uberlandia, Minas Gerais, Brazil.
authors: Itamar
authors: I
authors: Lopes-Júnior
authors: Barbara
authors: B
authors: de Lima Lucas
authors: Henner Alberto
authors: HA
authors: Gomide
authors: Vanderlei Luiz
authors: VL
authors: Gomes
mesh_terms: D000180:Acrylic Resins; D000044:Dental Abutments; D015921:Dental Implants; D003760:Dental Impression Materials; D003761:Dental Impression Technique / Q000295:instrumentation; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis / Q000379:methods*; D006801:Humans; D003765:Models, Dental; D010516:Periodontal Splints
chemical_list: D000180:Acrylic Resins; D015921:Dental Implants; D003760:Dental Impression Materials