Publicação
Influence of splinting materials (auto vs. photopolymerizing) on implant impression accuracy: an in vitro study
| datacite.subject.fos | Ciências Médicas::Medicina Clínica | pt_PT |
| dc.contributor.advisor | Caramês, João, 1962- | |
| dc.contributor.advisor | Francisco, Helena | |
| dc.contributor.author | Braz, Luís Miguel Baptista | |
| dc.date.accessioned | 2017-01-26T11:10:27Z | |
| dc.date.available | 2017-01-26T11:10:27Z | |
| dc.date.issued | 2016 | |
| dc.date.submitted | 2016 | |
| dc.description | Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016 | pt_PT |
| dc.description.abstract | Purpose: The aim of the present study was to evaluate if there was any significant difference in accuracy between multiple-unit dental implant casts obtained from splinted direct impression techniques using 2 splinting materials by comparing the casts to the reference models. The null hypothesis tested was that the accuracy of implant-impressions was not affected regardless of the splinting material used. Materials and Methods: One master model was fabricated with polyurethane by duplicating an edentulous mandibular arch. Four implant analogs (Biomet 3i®, Florida, USA- external connection) were placed in the intra-mental foramen region, simulating a supra osseous clinical environment and with longitudinal axis parallel to each other. The replicas were numbered anti-clockwise from 1 to 4 based on a frontal view of the master cast. Reference bars machined to fit passively were fabricated using cobalt-chromium alloy. The implant copings were splinted, after the appliance of a matrix of dental floss (ACCLEAN®, Henry Schein®, New York, USA), with CONLIGHT photopolymerizing composite (Conlight; Kuss Dental, Madrid, Spain) (Group A) and GC acrylic resin (GC pattern™; GC Corp, Tokyo, Japan) (Group B), twenty impressions were obtained - ten for each group - in accordance with manufacturer’s directions using a two-step impression technique: Putty - consistency vinyl polysiloxane (Panasil® Putty Soft, Kettenbach®, Eschenburg, Germany) was used as a tray material combinated with light-consistency vinyl polysiloxane (Panasil® Initial Contact Light, Kettenbach®, Eschenburg, Germany). Each cast produced was assessed for accuracy by attaching the respective reference framework with a single screw on analog number 1 and measuring the vertical gap between each cylinder and the respective analog (2, 3 or 4) at four different points - buccal, lingual, distal and mesial – using a toolmaker’s microscope. Results: The results showed there were significant differences between Group A (photopolymerizing composite) and Group B (PMMA autopolymerizing resin), comparing measurements in all analog/ point combinations. It was determined that in Group B the vertical gaps were statistically higher than the ones verified in Group A. vii Conclusions: The results of this study suggest that implant impressions splinted with photopolymerizing composite (Conlight; Kuss Dental, Madrid, Spain) presents better results on the accuracy comparing to implant impressions splinted with PMMA autopolymerizing acrylic resin (GC pattern™; GC Corp, Tokyo, Japan). Implant-level impressions made with PMMA autopolymerizing splinted resin resulted in statistically lower accuracy than the ones made in the photopolymerizing composite group. | pt_PT |
| dc.identifier.tid | 201291231 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10451/26222 | |
| dc.language.iso | eng | pt_PT |
| dc.subject | Materiais dentários | pt_PT |
| dc.subject | Resinas acrílicas | pt_PT |
| dc.subject | Implantes dentários | pt_PT |
| dc.subject | Teses de mestrado - 2016 | pt_PT |
| dc.title | Influence of splinting materials (auto vs. photopolymerizing) on implant impression accuracy: an in vitro study | pt_PT |
| dc.type | master thesis | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | masterThesis | pt_PT |
| thesis.degree.name | Mestrado Integrado em Medicina Dentária | pt_PT |