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05).<br /><br /> Before cyclic aging, there was no statistically significant difference in load-bearing capacity among the four groups (P = .371). After cyclic aging, the load-bearing capacity significantly decreased for all groups (P = .000). While the e.max CAD blocks had significantly higher load-bearing capacity (1,061 ± 94 N) than both monolithic ceramic crowns (P &lt; .05), no significant difference was obtained compared to the Initial LiSi Block group (920 ± 140 N) (Tukey HSD P = .061).<br /><br /> The mechanical performance of monolithic ceramic crowns fabricated from lithium disilicate was better than zirconia-reinforced lithium silicate after cyclic fatigue aging.<br /><br />The mechanical performance of monolithic ceramic crowns fabricated from lithium disilicate was better than zirconia-reinforced lithium silicate after cyclic fatigue aging.<br /><br /> To investigate the differences in accuracy (trueness and precision) of five different optical impression systems.<br /><br /> The accuracy of the following optical impression systems was tested (1) CEREC Bluecam (BL; Dentsply Sirona), (2) CEREC Omnicam (OM, Dentsply Sirona); (3) PlanScan (PL; Planmeca); (4) True Definition Scanner (TD; 3M ESPE); and (5) Trios 3 (TR; 3Shape). A standard plastic study model represented a patient with a fully dentate maxilla (ANA-4 V CER, frasaco). Three clinical situations were simulated Patient 1 (P1) fully dentate; Patient 2 (P2) anterior partial edentulism (two missing incisors); and Patient 3 (P3) posterior partial edentulism (P3) (missing premolar and molar). The models were scanned with a reference scanner (IScan D104i, Imetric), and the digitalized models were used as reference for all comparisons. Then, optical impressions were made for the three clinical scenarios (n = 10 per group).<br /><br /> In situation P1, the TD group provided the highest trueness (180.2 ± 46.3μm). In situation P2, the highest trueness was found in the TD (97.9 ± 27.6 μm) and TR (105 ± 9.5μm) groups, and in situation P3, TR had the highest trueness (P &lt; .05) with a median RMS value of 76.2 ± 5.6 μm. In terms of precision, TR provided the highest precision (P &lt; .05) in all three clinical situations, with RMS values 76.7 ± 26 μm for P1, 46.8 ± 14.1 μm for P2, and 39.7 ± 9.1 μm for P3.<br /><br /> Two optical impression systems (TR and TD) were superior to the other tested systems in most of the measurements. However, none of the tested systems was clearly superior with respect to both trueness and precision.<br /><br />Two optical impression systems (TR and TD) were superior to the other tested systems in most of the measurements. However, none of the tested systems was clearly superior with respect to both trueness and precision.<br /><br /> To evaluate the performance of complete dentures (CD) with anatomical and nonanatomical teeth in completely edentulous elderly individuals regarding oral health-related quality of life (OHRQoL), satisfaction, masticatory performance (MP), need for adjustment after CD placement, and patient preference for occlusal type.<br /><br /> A randomized crossover clinical trial comprising 50 edentulous elderly individuals was conducted. The participants were divided into two groups AT-NT (rehabilitated initially with anatomical teeth and 3 months later with nonanatomical teeth) and NT-AT (rehabilitated initially with nonanatomical teeth and 3 months later with anatomical teeth). OHRQoL was analyzed using the OHIP-EDENT; a satisfaction questionnaire was applied; MP was evaluated by the median particle size (×50) after chewing an artificial test food; and the number of adjustments of the prosthesis base was assessed quantitatively.<br /><br /> Overall, 34 elderly individuals (mean age 69 years) were analyzed. No significant difference was observed between CD users with anatomical and nonanatomical teeth for OHRQoL (P = .674), satisfaction (P = .725), MP (P = .849), or number of adjustments (P = .135). Most subjects (52.9%) did not express a preference for any occlusal surface type. However, among those with a preference, the majority (32.4%) opted for nonanatomical teeth.<br /><br /> Both posterior tooth types are eligible for oral rehabilitation in elderly users of conventional CDs, as the variables were not influenced by occlusal morphology. However, further studies are warranted in highly resorbed mandibular edges or in cases of adaptation difficulties, as the results may differ.<br /><br />Both posterior tooth types are eligible for oral rehabilitation in elderly users of conventional CDs, as the variables were not influenced by occlusal morphology. [https://www.selleckchem.com/products/nazartinib-egf816-nvs-816.html selleck chemicals] However, further studies are warranted in highly resorbed mandibular edges or in cases of adaptation difficulties, as the results may differ.<br /><br /> To compare oral health-related quality of life (OHRQoL) and masticatory performance (MP) in patients treated with a mandibular complete denture (CD) and immediately loaded implant-supported prostheses (ISP).<br /><br /> Forty patients were divided into CD and ISP groups. Initially, all patients were treated with a mandibular CD. Then, 23 patients remained with a CD while 17 patients were treated with an ISP after wearing the CD for 3 months. OHRQoL was measured using the OHIP-EDENT questionnaire, and MP was evaluated by sieving. Data were recorded before treatment (T0) and after 3 months wearing the CD and ISP (T1).<br /><br /> CD treatment did not affect OHRQoL and PM; however, patients treated with an ISP presented improvement in OHRQoL (P &lt; .001) and MP (P &lt; .001) with a high effect size (ES) (Cohen's d = 2.49 and 2.47, respectively). For intergroup analysis, ISP treatment presented improvement in OHRQoL and MP compared to CD treatment (P &lt; 0.001) at T1 with a high ES (Cohen's d = 1.80 and 3.29, respectively). The correlation between MP and OHRQoL was positive only for psychologic discomfort in the CD group at T0 (P = .035), suggesting that poor MP increased psychologic discomfort.<br /><br /> Converting a CD into an ISP had a positive impact on OHRQoL and MP with high ES.<br /><br />Converting a CD into an ISP had a positive impact on OHRQoL and MP with high ES.<br /><br /> To assess the shear bond strength of composite resin to polyether ether ketone (PEEK) after mechanical and chemical surface treatments.<br /><br /> A total of 48 PEEK discs were fabricated and divided equally into four surface treatment groups (n = 12 each) (1) airborne particle abrasion with 50-μm alumina particles at 2 MPa pressure for 10 seconds; (2) 98% sulfuric acid etching for 1 minute; (3) airborne particle abrasion and sulfuric acid etching; and (4) no surface treatment. Specimens were conditioned, then Gradia composite veneer (GC) was applied to the PEEK surfaces and polymerized. Bond strength was measured with shear bond test using a universal testing machine. One-way analysis of variance and Tukey post hoc tests were applied for statistical analysis.<br /><br /> The mean shear bond strength values of the sulfuric acid-etched group were higher than that of the airborne particle abrasion + acid etching, airborne particle abrasion, and control groups (P &lt; .05). Mean shear bond strength values for the airborne particle abrasion + acid etching samples were higher than for the control and airborne particle abrasion groups (P &lt; .