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Öğe Comparison of reliability of 3 resonance frequency analysis devices: An in vitro study(Silver Chair İnformation Systems, 2022) Diker, Burcu; Diker, Nurettin; Tak, ÖnjenThe purpose of the present study was to investigate the intraobserver and interobserver reliability of 3 resonance frequency analysis (RFA) devices and to compare the implant stability quotient (ISQ) values according to implant macro design and diameter in 2 different bone densities. A total of 64 implants (Neoss ProActive; Neoss; Harrogate, UK) of varying diameters (3.5 and 4.0 mm) and implant macro design (tapered and straight) were placed in 2 artificial bone blocks (the density of type 2 and 3). The implant primary stability was measured using Osstell IDx (Osstell; Göteborg, Sweden), Osstell Beacon and Penguin RFA (Integration Diagnostics; Göteborg, Sweden). The ISQ value of each implant was measured by 2 observers and recorded 5 times in 2 directions. The intraobserver and interobserver reliability of RFA devices were evaluated. In addition to that, mean ISQ values were calculated for each RFA device to evaluate the effect of implant diameter, implant macro design, and bone density on ISQ values. ISQ values were significantly higher for implants placed within the type 2 bone than for the type 3 bone. The 4.0-mm diameter implants presented higher ISQ values than 3.5-mm diameter implants. The intraclass correlation coefficient (ICC) values for intraobserver reliability were above 0.85 for each observer and the ICC values for interobserver reliability were 0.94, 0.93, and 0.98 for Osstell IDx, Osstell Beacon, and Penguin RFA, respectively. Although there was excellent interobserver reliability with 3 RFA devices, the intraobserver reliability of Osstell Beacon and Penguin RFA were slightly better than Osstell IDx. Bone density and implant diameter were parameters affecting the primary stability of implants.Öğe Effect of different composite resin materials used as core buildups on the trueness of intraoral scanning(QUINTESSENCE PUBLISHING CO INC, 2021) Elter, Bahar; Diker, Burcu; Tak, ÖnjenPurpose: To evaluate the trueness of digital impressions of different composite resin materials that can be used for core buildups in clinical practice. Materials and Methods: A maxillary central incisor was prepared and scanned with an intraoral scanner (Primescan, Dentsply Sirona). Ten composite resin specimens (in three groups: universal composite; flowable composite; and bulk fill composite) were milled in the same dimensions of the prepared tooth and scanned. The data of the prepared tooth were used as reference, and the data obtained from the composite resin specimens were aligned using an evaluation software (Geomagic Studio 12) to determine deviation values. Kruskal-Wallis with Dunn post hoc test was performed to compare differences among the composite resin groups (alpha = .05). Results: There were significant differences in the trueness of digital impressions between some composite resin groups (P < .05). The mean trueness deviation values were in the range of 12.75 mu m (G-aenial Posterior) to 17.06 mu m (Filtek Bulk Fill Posterior). The trueness of G-aenial Posterior (12.75 mu m) was higher than that of Core-X Flow (14.62 mu m), Clearfil Majesty Flow (16.93 mu m), and Filtek Bulk Fill Posterior (17.06 mu m). Filtek Bulk Fill Posterior exhibited lower trueness than Clearfil Majesty Esthetic (12.93 mu m), Clearfil Majesty Posterior (13.50 mu m), and Charisma Classic (13.81 mu m). Conclusion: Different composite resins used for core buildup can impact the trueness of digital impressions, with universal composite resin scans being the truest compared to flowable and bulk fill composite resin scans. All scanned substrate groups can be regarded as within a clinically acceptable range.Öğe Influence of cement shade, ceramic thickness, and airborne-particle abrasion of titanium surface on the final color of monolithic lithium disilicate glass-ceramic hybrid-abutment systems in vitro(QUINTESSENCE PUBLISHING CO INC, 2022) Elter, Bahar; Tak, ÖnjenObjectives:The purpose of this in vitro study was to evaluate the influence of the ceramic thickness, cement shade, and airborne -particle abrasion of the titanium on the final color of titanium base cemented lithium disilicate glass-ceramic restorations.Method and materials: In total, 144 lithium disilicate glass -ce-ramic disks of three thicknesses (0.5, 1.0, and 1.5 mm) were ce-mented to airborne-particle-abraded and non -airborne-particle -abraded titanium disks with six adhesive resin cements. The color measurements were performed with a clinical spectrophotometer. The mean and standard deviation of evaluated AE values were calculated. A three-way analysis of variance (ANOVA) was used for analyzing the data. Statistical analyses were computed with a sig-nificance level of alpha = .05 using a statistical software program (Minitab 17, Minitab). Results:The 0.5-and 1-mm-thick ceramic specimens cemented with Panavia V5 Opaque showed the lowest AE values when cemented on both non-airborne-particle-abraded (5.62 +/- 1.66, 3.15 +/- 1.28) and airborne-particle-abraded (5.55 +/- 0.86, 3.16 +/- 0.49) surfaces, while the highest values were seen in the groups cemented with RelyX U200 A2 (29.22 +/- 0.83, 17.23 +/- 0.45) and Panavia V5 A2 (29.94 +/- 1.17, 16.71 +/- 0.44) on airborne -particle-abraded surfaces. For the 1.5-mm-thick ceramics, the lowest AE values were seen when Multilink MO 0 cement was used on non-airborne -particle-abraded surfaces (1.56 +/- 0.29) and when Panavia V5 Opaque was used on airborne-particle-abraded surfaces (1.56 +/- 0.66). The highest values were seen when RelyX U200 A2 (9.77 +/- 1.13), PA2 (9.24 +/- 0.25), and Multilink HO 0 (9.19 +/- 1.33) were used on airborne-particle-abraded surfaces, and when Multilink HO 0 (9.61 +/- 1.70) was used on non-airborne -parti-cle-abraded surfaces. The 1-mm-thick ceramics cemented with Multilink HO 0 showed higher AE values (12.05 +/- 1.99) for airborne- particle-abraded and non-airborne-particle-abraded (12.58 +/- 1.06) than thinner (0.5 mm) or thicker (1.5 mm) ceramics. Conclusion: Thinnest ceramic superstructures resulted in the highest AE val-ues. Cements that mask the underlying color reflect their own shade under thin superstructures. Airborne-particle abrasion of titanium surfaces increases the grayish reflectance if cement shade does not have the color masking ability.Öğe The trueness of an intraoral scanner in scanning different post space depths(Elsevier Science, 2022) Elter, Bahar; Diker, Burcu; Tak, ÖnjenThe trueness of an intraoral scanner in scanning different post space depths
