To assess the efficacy of monochromatic resins in capturing adjacent tooth color across various shades and cavity types, both before and after thermocycling. Furthermore, the surface roughness of the restorations was evaluated. This is a laboratory test that used 40 mandibular incisors with a healthy crown obtained from the Human Teeth Bank of the UFVJM School of Dentistry. The teeth were randomly assigned to two groups: one group was restored with Omnichroma composite resin, while the other one was restored with Vittra APS Unique composite resin. Three preparations were performed on each tooth in both groups, namely: Classes III, IV and V. Evaluations of USPHS and modified FDI criteria, analysis of roughness using a using a digital surface roughness tester and color reading with a spectrophotometer before and after thermocycling were performed. The data were submitted to descriptive statistics, Chi-square test and the T-test using the SPSS software, and a p-value of < 0.05 was considered statistically significant. There was no significant difference between the groups in relation to the parameters of shape (p > 0.05), marginal integrity (p > 0.05) and color (p > 0.05) in the USPHS analysis, as well as the ΔE in the CIEL* a* b* analysis (p > 0.05) and color in the FDI analysis (p > 0.05), in all classes. Clinically detectable differences were observed between classes IV (ΔE = 3.80) and V (ΔE = 5.02) restorations of the Omnichroma resin compared to the tooth. The ∆E of Vittra resin was considered unacceptable in all classes (ΔE varied from 4.35 to 5.52). The Vittra resin class III restoration showed the best adaptability (L*: p = 0.462; a*: p = 0.252 and b*: p = 0.335). There was no statistically difference between groups in the surface roughness analysis either initially (p = 0.564) or after thermocycling (p = 0.690). It was concluded that the color match of the composite resins Omnichroma and Vittra APS Unique was found to be clinically satisfactory in USPHS and FDI analysis. Both resins showed low surface roughness.

This study evaluated the effects of incorporating silk fibroin nanoparticles into self-curing polymethyl methacrylate (PMMA) on the mechanical and Candida albicans responses of provisional dental prostheses. Rectangular specimens (64 × 10 × 3 mm) were fabricated and assigned to three groups (n = 10): G1 (control), PMMA without reinforcement; G2, PMMA with 0.5% silk nanoparticles; and G3, PMMA with 1% silk nanoparticleScheme4. 4 × 6 mm) were prepared. Scanning electron microscopy (SEM) was used to assess nanoparticle incorporation within the polymer matrix. No significant differences were observed in surface roughness (G1 = 0.4118 ± 0.100; G2 = 0.3245 ± 0.072; G3 = 0.3269 ± 0.076) or microhardness (G1 = 12.21 ± 0.351; G2 = 12.72 ± 0.213; G3 = 12.53 ± 0.177). Flexural strength differed significantly among the groups (p = 0.009), with higher values in nanoparticle-reinforced specimens (G1 = 79.142 ± 3.202; G2 = 87.089 ± 2.756; G3 = 92.412 ± 1.963). None of the tested concentrations exhibited antifungal activity against C. albicans. In conclusion, the incorporation of silk fibroin nanoparticles enhanced the flexural strength of self-curing PMMA without adversely affecting surface roughness or microhardness, although no antifungal effect was detected at the evaluated concentrations.

The incorporation of antimicrobial agents into 3D-printed resins may improve their biological performance; however, their effects on physicochemical and mechanical properties remain unclear. This study evaluated the influence of phosphorylated chitosan (P-Chi; 0.25% and 0.50% w/w) incorporated into short- (ST) and long-term (LT) 3D-printed dental resins. Surface, mechanical, optical, and antibacterial properties against Streptococcus mutans were investigated using standardized methods. FTIR confirmed the successful phosphorylation and incorporation of P-Chi into both resin matrices. P-Chi significantly reduced S. mutans CFU counts compared with the control (p < 0.001, η²p = 0.286), regardless of concentration, although no inhibition halos were detected, indicating a contact-dependent antimicrobial mechanism. Enhanced antibacterial activity was accompanied by increased surface roughness and wettability. Nanoparticle concentration significantly affected mechanical performance (p = 0.001), whereas resin type did not (p = 0.613). The 0.25% groups exhibited lower flexural strength and microhardness than the controls (p < 0.05), while the 0.50% groups maintained flexural strength comparable to that of the controls, with G6 showing the highest elastic modulus (3494.95 ± 301.30 MPa). Color variation was influenced by resin type rather than P-Chi concentration (p < 0.05). Overall, P-Chi enhanced antibacterial activity while maintaining clinically acceptable mechanical properties, supporting its use as a multifunctional additive for biofunctional 3D-printed provisional resins.

Ti owes its clinical durability to a protective passive oxide film; however, repetitive toothbrushing and fluoride exposure may disrupt this interface and increase its susceptibility to tribocorrosion. This in vitro study investigated the electrochemical behaviour and surface integrity of commercially pure titanium (CpTi) grade II coated with Ta₂O₅ or ZrO₂ after simulated toothbrushing. CpTi discs were divided into three groups: CpTi, CpTi/Ta₂O₅, and CpTi/ZrO₂. The coatings were deposited by reactive DC magnetron sputtering. Film thickness and adhesion were assessed by step-height and tape tests. Simulated toothbrushing was performed for 22,080 cycles/2 Hz under a load of 200 gf in either Fusayama artificial saliva (AS) or a fluoridated dentifrice (FD) slurry with AS (1:2 w/w). Surface morphology, elemental composition, topography, roughness, crystalline structure, and wettability were evaluated using SEM/EDS, AFM, XRD, and static and dynamic contact angle (CA) measurements. Electrochemical behaviour was assessed by OCP, EIS, and potentiodynamic polarisation. Toothbrushing induced cyclic OCP shifts consistent with depassivation and repassivation, with surface- and medium-dependent electrochemical responses (p ≤ 0.001). CpTi exhibited a more active electrochemical state, higher i_corr, and more pronounced surface alterations. Both coatings significantly improved i_corr and corrosion rate (CR) (p < 0.001). Ta₂O₅ provided the greatest electrochemical protection, reducing the CR by approximately 95% versus 77% for ZrO₂. Topographical response to F brushing was also surface-dependent (p < 0.001). Roughness was unchanged after corrosion but surface-dependent after toothbrushing (p < 0.001), while wettability increased after corrosion (p ≤ 0.003) and CAH was surface-dependent (p = 0.003). Within the limitations of this in vitro study, Ta₂O₅ and ZrO₂ coatings enhanced the electrochemical response of CpTi under simulated oral-hygiene challenges, with Ta₂O₅ providing the strongest overall protection, suggesting that oxide surface modification is a promising strategy for improving the tribocorrosion behaviour of Ti-based dental materials.

There is no consensus in the literature about the best non-cytotoxic antibacterial surface treatment for dental implants. So, this sistematic review aims critically evaluate the existing literature and answer the question: ‘’Which surface treatment in dental implants shows better non-cytotoxic antibacterial activity?’’. The search strategy will applied in the databases Embase, PubMed, Science Direct, and Scopus. Two independent reviewers (1R and 2R) will select the included articles in two phases. Firstly (phase- 1), the two reviewers will evaluate the titles and abstracts according the eligibility criteria; secondly (phase-2), they will s and select articles by the same criteria as phase-1; then, they will crosscheck all the information found. If disagreements arise, a third reviewer (3R) will participate before a final decision is made of both phases. If important data for the review are missing or unclear, an attempt will be made to contact the study corresponding author to resolve or clarify the problem. The citation manager will inserte in the EndNote Web to save and to remove duplicates, after the citation managers resulte will inserte in the Rayyan web app to analyze the titles and abstracts in the first phase. The selection process will realize in two phases. In the first phase the reviewers R.L.O.R and J.D.C.T will assess independently the titles and abstracts to find articles that meet eligibility criteria. In the second phase, the articles selected in the first phase will read in the full to select articles for this review. The coordinator A.C.R will solve the doubts in the consensus meeting. To compose this systematic review will selecte articles that assessment the antibacterial activity and cytotoxicity of dental implants when treated superficially without time and language restriction. And will exclude a) systematic reviews, book chapters, observational studies, and case reports, b) articles that studied non-dental implants, c) articles that evaluated only the development of superficial treatment. The quasi-experimental studies appraisal tool by the Joanna Briggs Institute will be adapte to assess the risk of bias. The reviewers will tabulate independently data in a Microsoft Excel spreadsheet according to Author, year; Population (alloy, groups); Intervention (surface treatment); Comparison (control); Outcome for antimicrobial activity (assay, bacteria, and result) and outcome for cell viability (assay, cell, and result). If possible will be realize the meta-analysis.

Myofascial pain in Temporomandibular Disorder (TMD) involves hypersensitive facial muscle trigger points, affecting quality of life. This trial aimed to evaluate the efficacy of acupuncture and low-level laser therapy for TMD-related pain relief. A randomized controlled trial with 14 participants (10 females, 4 males; mean age 29.5 years) divided into two groups (n=7). Group 1 received ten 20-minute acupuncture sessions every 48 hours, while Group 2 underwent low-power infrared laser therapy (790 nm, 120 mW) on the same schedule. Pain was assessed using a 0–10 Visual Analog Scale (VAS), and neuromuscular activity via bilateral electromyography (EMG) of the temporal and masseter muscles. Statistical analysis used SPSS 22.0 with Wilcoxon and paired t-tests (p<0.05). Both treatments significantly reduced subjective pain perception (VAS: Acupuncture 6.57 to 0.14; Laser 6.00 to 1.20), with no significant difference between groups. However, neither therapy significantly decreased neuromuscular activity in the temporal and masseter muscles, although acupuncture showed a trend toward reduced temporal muscle activity during clenching. Acupuncture and low-level laser therapy effectively reduced pain in patients with myofascial TMD. Despite differences in neuromuscular patterns, neither treatment significantly altered muscle activity, warranting further research to explore their underlying mechanisms.