Aim: The present study aimed to evaluate the effect of three various polishing agents on provisional restorative material on immersion in a staining solutions.
Objectives: The objective of the study is (1) To evaluate the effect of pumice on staining characteristics of provisional restorative material before and after immersion in chlorhexidine. (2) To evaluate the effect of aluminum oxide paste on staining characteristics of provisional restorative material before and after immersion in chlorhexidine. (3) To evaluate the effect of diamond paste on staining characteristics of provisional restorative material before and after immersion in chlorhexidine. (4) To compare and assess the outcome of three polishing agents on staining characteristics of provisional restorative material.
Materials And Methods: Sixty samples (10 mm × 2 mm) were fabricated of bis-acryl composites (Protemp™ 4) by utilizing a metal mold. The samples were grouped into three groups ( = 20), and various polishing agents were used, including pumice, aluminum oxide paste, and diamond polishing paste. The samples that were not exposed to any polishing agent served as the control group. The samples were kept in a water bath for a day at 37°C and were stained with chlorhexidine mouthwash. The color of all specimens was measured with a spectrophotometer before and after polishing, and color changes (ΔE) were calculated.
Results: By using one-way ANOVA, significant difference was found in mean color change in three polishing materials ( = 4.44, = 0.016). By using Tukey test, statistically significant difference was found among pumice and aluminum oxide paste ( = 0.027), among pumice and diamond paste ( = 0.041) and no significant difference was found among aluminum oxide paste and diamond paste ( = 0.985).
Conclusion: Pumice exhibited less staining which was statistically significant when compared with aluminum oxide paste and diamond paste. Hence, it can be considered the most efficient polishing agent.
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http://dx.doi.org/10.4103/jispcd.JISPCD_431_18 | DOI Listing |
Nat Commun
December 2024
Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
The potential for mitigating intestinal inflammation through the gut-bone axis in the treatment of osteoporosis is significant. While various gut-derived postbiotics or bacterial metabolites have been created as dietary supplements to prevent or reverse bone loss, their efficacy and safety still need improvement. Herein, a colon-targeted drug delivery system is developed using surface engineering of polyvinyl butyrate nanoparticles by shellac resin to achieve sustained release of postbiotics butyric acid at the colorectal site.
View Article and Find Full Text PDFJ Endod
December 2024
Department of Endodontics, Nihon University School of Dentistry, 1-8-13, Kanda-surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan; Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan.
Introduction: We have recently reported the clinical efficacy of mirogabalin for occlusal pain due to post-traumatic trigeminal neuropathic pain (PTTN-occlusal pain) after endodontic treatment according to the International Classification of Orofacial Pain criteria. This study aimed to determine the mirogabalin administration period and timing of dose reduction and suspension for treating this condition based on managing a certain number of cases.
Methods: Patients diagnosed with PTTN-occlusal pain after or during endodontic treatment were included in the study.
J Dent
December 2024
Professor and Clinic director, Clinic of General-, Special Care- and Geriatric Dentistry, Center for Dental Medicine, University of Zurich, Zurich Switzerland. Electronic address:
Objectives: This double-blind randomised crossover trial aimed to compare the aesthetic outcomes of CAD-CAM manufactured provisional restorations created using cone beam computed tomography (CBCT) and intraoral scanners (IOS) acquisition methods.
Methods: Twelve participants (mean-age: 38 ± 5 years) requiring full mouth rehabilitation were included in this crossover trial. Two sets of identical CAD-CAM provisional restorations, differing only in the method of data acquisition (A: CBCT, B: IOS), were fabricated.
J Funct Biomater
November 2024
King Abdullah International Medical Research Center, Riyadh 11481, Saudi Arabia.
The aim of the study is to assess the impact of mechanical surface treatments on the shear bond strength (SBS) of orthodontic brackets bonded to three-dimensional (3D) printed and milled CAD/CAM provisional materials. Sixty cylindrical samples were fabricated for each provisional material. Samples were treated with one of the following surface treatments: aluminum oxide airborne particle abrasion, diamond bur rotary instrument roughening, and phosphoric acid etching (control).
View Article and Find Full Text PDFFront Oral Health
December 2024
Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
Objectives: The influence of printing parameters on the marginal and internal fit of three-dimensional (3D) printed interim fixed partial dentures (IFPDs) has been understudied. This investigation sought to elucidate the impact of printing orientation and post-curing time on these critical factors.
Methods: A total of 260 3-Unit IFDPs were printed using two different resins (130/NextDent C&B MFH and 130/ASIGA DentaTOOTH).
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