Assessment of Fit on Ten Screw-Retained FrameworksRealized through Digital Full-Arch Implant Impression

Abstract

Background: Discordant opinions have emerged among clinicians and researchers regarding a digital impression for full-arch implant-supported fixed dental prostheses (FDPs). The purpose of this study was to assess the fit of screw-retained milled frameworks on six implants realized from digital impressions through the Sheffield test. Methods: One patient received a maxillary full-arch implant-supported FDP. Six months after the surgical procedure, ten intraoral full-arch digital impressions were performed to mill ten frameworks. To clinically assess the fit, the Sheffield test was applied for all frameworks. The gaps among the frameworks and the implant analogs were measured using a microscope on the master model realized with a traditional impression. The Wilcoxon sum-rank test was used to compare the misfit value among the different implant positions. Results: The Sheffield test did not show gaps in the framework–implant interfaces when the screw was completely tightened on the more distal implant for all the milled frameworks. The mean misfit value calculated after microscope examination was 38 ± 5 μm. Differences that were statistically significant emerged when the misfit values of central positions were compared with other values. Conclusions: The use of full-arch implant digital impressions represents a viable alternative to traditional impressions for the fabrication of implant-supported FDPs.

Soft-Tissue Management Dental Implants with Digitally Customized Healing Abutments: A Pilot Study

“…Additionally, they reported favourable clinical outcomes, with a high mean Functional Implant Prosthodontic Score (FIPS) of 8.2 ± 1.0 for the analyzed implant restorations. Several other studies have also highlighted the potential benefits of digital workflows in implant dentistry, such as improved accuracy [32][33][34][35][36], efficiency [37,38], and patient satisfaction [23]. However, as emphasized by Joda et al [21] and other authors [39,40], larger and longer-term clinical trials are necessary to establish the long-term efficacy, safety, and potential limitations of these emerging digital techniques.…”

Contour Analysis of Three-Dimensional Peri-Implant Mucosal Model as an Endpoint Analysis of Photofunctionalization Effects on Implant Abutment Materials

“…Additionally, the impression materials injected into the model may not flow well into the crevice of the material–soft tissue interface due to the hydrophobic nature of the impression materials if the model is not dried enough. To overcome this limitation, the use of intra-oral scanners may produce more accurate digital impressions [ 50 ] and able to reduce imperfection [ 51 ].…”

The Impact of Sintering Technology and Milling Technology on Fitting Titanium Crowns to Abutment Teeth—In Vitro Studies

“…Dental abutments can be scanned directly in the mouth or using impression material mapping [ 42 ]. The use of impression materials is a certain limitation of the study in clinical procedures.…”