Erosive-abrasive effects on optical and surface properties of 3D printed resins with different surface finishing: An in vitro study Frederico Guilherme Otto Kokol, Joissi Ferrari Zaniboni, Francisco Fernando Massola Filho, Aryvelto Miranda Silva, Edson Alves de Campos Journal of Prosthetic Dentistry, 2026 Three-dimensional (3D) printing has significantly advanced restorative dentistry by facilitating the rapid and exact fabrication of restorations and prostheses with complex morphologies. 1,2These systems provide enhanced workflow flexibility and personalization, facilitating the production of both interim and definitive restorations. 3,4However, the durability of these restorations in clinical settings depends fundamentally on maintaining their optical and surface stability within the challenging oral environment. 5,6ental restorative materials are constantly exposed to chemical, thermal, and mechanical stressors, such as acidic foods, colored drinks, and abrasion from toothbrushing, all of which may compromise the surface integrity and optical properties of the materials. 7,8Threedimensionally printed resins can exhibit greater susceptibility to increased surface roughness and loss of gloss following simulated toothbrushing and thermocycling when compared with milled computer-aided design and computer-aided manufacturing (CAD-CAM) resin materials. 4,6,9
Effect of Erosive-Abrasive Challenge and Surface Finishing Protocols on Optical Properties and Microhardness of CAD-CAM Ceramics Joissi Ferrari Zaniboni, Amanda Soares Silva, Aryvelto Miranda Silva, João Felipe Besegato, Edson Alves de Campos Journal of Esthetic and Restorative Dentistry, 2026 PurposeTo evaluate the effect of erosive‐abrasive challenge on the optical properties, microhardness, and surface morphology of CAD‐CAM ceramics with different surface finishing protocols.MethodsCAD‐CAM ceramics used were: IPS e.max CAD (DIS), IPS Empress CAD (LEU), Cerec Blocs (FEL), and Celtra Duo (CEL). Specimens were divided into five groups (n = 10): Polishing (P), Conventional Glaze (CG—control), Conventional Glaze with 2 firings (CG2), Extended Glaze firing (EG), and Extended Glaze with 2 firings (EG2). An erosive‐abrasive challenge was performed with citric acid and simulated toothbrushing. Color change (ΔE00), translucency, contrast ratio, gloss, Vickers microhardness, and surface morphology were evaluated. The evaluations were performed before and after the erosive‐abrasive challenge. ΔE00 was analyzed with one‐way ANOVA with Welch correction and Games‐Howell, while the other data were evaluated with two‐way repeated measures ANOVA and Bonferroni post‐test (α = 0.05%).ResultsAfter the challenge, CG groups showed clinically unacceptable color changes. Translucency decreased in LEU‐P, FEL‐P, FEL‐EG, and CEL‐EG groups, but increased in DIS‐CG2, DIS‐EG2, and CEL‐EG groups. The contrast ratio was close to 1. No gloss reduction was observed in CG groups. Microhardness decreased in DIS‐EG, DIS‐EG2, LEU, FEL, and CEL groups, but remained unchanged in LEU‐CG, FEL‐CG2, and CEL‐EG2 groups.ConclusionErosive‐abrasive challenge affected the properties of CAD‐CAM ceramics with different behaviors depending on the surface finishing protocol used.Clinical SignificanceThe optical properties and microhardness of CAD‐CAM ceramics are negatively affected by erosive‐abrasive conditions. Manual polishing showed similar performance in maintaining these properties and may represent a viable and effective alternative to glaze application.
Effects of Cleaning Solutions and Time-Point of Adhesive System Application on Pulp Chamber Dentin Impregnated with Endodontic Sealer João Felipe Besegato, Bárbara Dias Rigo, Mariana Bena Gelio, Anna Thereza Peroba Ramos Rezende, Wilfredo Gustavo Escalante-Otárola, et al. European Endodontic Journal, 2026 OBJECTIVE: To evaluate the effects of cleaning solutions on dentin impregnated with an epoxy resin-based endodontic sealer, using a self-etch adhesive system applied at different time-points, to understand how these factors affect the bonding of final restoration. METHODS: This experimental study used 150 bovine incisors. Three cleaning protocols (ethanol (ET), xylol (XY) or an experimental solution (EX)) and 2 time-points of adhesive system application (immediate or after 7 days) were evaluated. The persistence of residues (PR), open dentinal tubules (ODT), microshear bond strength, failure mode, and dentinal penetrability of the adhesive system were analyzed. Kruskal-Wallis/Dunn's tests or 2-way ANOVA/Tukey's test (α = 0.05) were used. RESULTS: Ethanol resulted in greater PR and fewer ODT, negatively affecting adhesive penetrability and bond strength, with worse results when adhesive system application is delayed (P < .05). The EX and XY solutions were more effective in removing sealer residues, opening dentinal tubules, adhesive penetrability, and microshear bond strength, regardless of the time-point of adhesive system application. CONCLUSION: Xylol and EX solutions showed superior performance compared to ET. The findings suggest that while XY and EX allow the final restoration to be performed either immediately or after 7 days, the use of ET requires the restoration to be executed in the same session to ensure more favourable bonding to dentin.
Fracture Resistance of Endodontically Treated Teeth Restored with High-Viscosity Bulk-Fill Resin Composites Aline Carvalho Girotto, Phelipe Alves Moreira, Joissi Ferrari Zaniboni, Aryvelto Miranda Silva, Mariana Bena Gelio, et al. Pesquisa Brasileira Em Odontopediatria E Clinica Integrada, 2025 ABSTRACT Objective: To evaluate the fracture resistance of endodontically treated teeth restored with different high-viscosity bulk-fill resin composites. Material and Methods: Forty extracted human upper premolars were endodontically treated and divided into four groups based on the bulk-fill resin composite used: CO: Scothbond Multi-Purpose + Fütek Z3S0XT; SF: Scothbond Universal + Fütek Bulk Fill; SO: OptiBond All-in-one + SonicFill; and, TT: Tetric N- Bond Universal + Tetric N-Ceram Bulk Fill. Universal adhesive systems were applied using the self-etching technique. After 24 hours, specimens underwent compressive loading at lmm/min, and fracture patterns were evaluated. Data were statistically analyzed using one-way ANOVA and Tukey’s post-test (p>O.OS), while fracture patterns were assessed with the chi-square test (p<O.OS). Results: Fracture resistance was similar across groups (p>O.OS), with favorable fractures observed in the CO and SF groups. Conclusion: The fracture resistance of endodontically treated teeth restored with bulk-fill resin composites does not differ from those restored with conventional nanohybrid resin composites.
Bonding and Cleaning Effects of Irrigation Protocols Using Calcium Hypochlorite on the Post-space Radicular Dentin JF Besegato, GR Bravo, JF Zaniboni, LG Belizário, ENM de Almeida, MB Gelio, WG Escalante-Otárola, MC Kuga Operative Dentistry, 2024 SUMMARY This study evaluated the effect of 2.5% sodium hypochlorite (SH) or calcium hypochlorite (CH) submitted to passive ultrasonic irrigation (PUI) or conventional irrigation (CI) on the incidence of residues and the bond strength of the cementation system to post-space dentin. Distilled water (DW) and 2.5% SH followed by 17% EDTA (SH-ED) were used as negative and positive control groups, respectively. The cervical, middle, and apical thirds of the post space were evaluated. One hundred and twenty bovine incisors were endodontically treated and post-space preparation was performed. The specimens were randomly assigned to six groups, according to the solution and irrigation method: DW-CI, SH-ED-CI-SH, SH-CI, SH-PUI, CH-CI, and CH-PUI. The incidence of residues (n=10) over the dentin was evaluated by scores using SEM images. Other specimens were irrigated as previously described and the post cementation was immediately performed using a conventional dual resin cement and a two-step etch-and-rinse adhesive system. Push-out and failure modes were performed for bonding evaluation. Kruskal-Wallis and Dunn test for incidence of residues data and one-way ANOVA and Tukey tests for bond strength data were used at a significance level of 5%. The protocols that showed a lower incidence of residues were: SH-ED-CI-SH, SH-PUI, and CH-PUI for the cervical third and SH-ED-CI-SH for the middle third (p&lt;0.05). In the apical third, the protocols were similar to each other (p&gt;0.05). Bond strength values were higher after irrigation with DW-CI for all thirds (p&lt;0.05). 2.5% sodium or calcium hypochlorite negatively impacted the adhesion interface and exhibited a greater incidence of residues over the post-space radicular dentin.
Sealing of pulp chamber dentin in endodontics: Influence of bond strategy and time‑point application Cristian Fernando Sanchez Puetate, Aline Carvalho Girotto, Joissi Ferrari Zaniboni, Mariana Bena Gelio, João Felipe Besegato, Milton Carlos Kuga Journal of Conservative Dentistry and Endodontics, 2024 Context: Seal the dentin of the pulp chamber during endodontic treatment to avoid interfering with the restorative treatment performed afterward. Aims: The aim was to evaluate the effect of three adhesive systems applied in different bonding strategies (etch-and-rinse, self-etch, and universal adhesive) and time-point application (immediately after the cavity access preparation or after endodontic obturation) on the hybrid layer formation and dentinal penetrability. Materials and Methods: Forty-eight sound molars were randomly distributed into six groups (n = 10) according to the adhesive system used: Forty-eight sound molars were randomly distributed into six groups (n = 10) according to the adhesive system used and the time-point application: Adper Scotchbond Multi-purpose (AS), Clearfil SE (CF) and Scotchbond Universal (SU) in strategy of immediate endodontic sealing (IES) or delayed endodontic sealing (DES). In IES-AS, IES-CF, and IES-SU groups, dentin sealing was performed immediately after the cavity access, while in DES-AS, DES-CF, and DES-SU, after root canal obturation. The specimens were sectioned in the long axis, in a buccal-lingual direction, and the dentinal penetrability of the adhesive systems was evaluated using confocal microscopy images. Hybrid layer formation was analyzed by scanning electron microscopy images. Statistical Analysis Used: Dentinal penetrability data were analyzed with the ANOVA test and the Kruskal–Wallis test was performed for hybrid layer data (α = 0.05). Results: IES-CF showed the lowest dentinal penetrability (P < 0.05), while the other protocols were similar to each other (P > 0.05). No significant differences were found between groups regarding the hybrid layer formation (P > 0.05). Immediate and DES protocols do not influence the hybrid layer formation, regardless of the bond strategy used. Conclusions: Sealing the pulp chamber dentin before endodontic treatment can improve the bond strength of the final restoration but the formation of the hybrid layer was not influenced by the bond strategy.
Clinical evaluation of surface treatment on clinical performance of non-carious sclerotic cervical lesions: 18-month follow-up American Journal of Dentistry, 2023