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Al-Zain AO, Baeesa L, Jassoma E, Alghilan MA, Hariri M, Ismail EH, Münchow EA. Assessment of internal porosities for different placement techniques of bulk-fill resin-based composites: a micro-computed tomography study. Clin Oral Investig 2023; 27:7489-7499. [PMID: 37971540 DOI: 10.1007/s00784-023-05337-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 10/11/2023] [Indexed: 11/19/2023]
Abstract
OBJECTIVES The aim was to compare the porosity of different bulk-fill resin-based composites (RBCs) placement techniques to the conventional incremental technique using microcomputed tomography (μ-CT). MATERIAL AND METHODS Occlusal cavities were prepared on extracted human molars, divided into five groups based on the placement technique (n = 10/group). Techniques examined were Monoblock-two-step (SureFil SDR flow + Ceram.X), Monoblock-two-step (Tetric EvoFlow Bulk-Fill + Tetric EvoCeram Bulk-Fill), Monoblock-one-step (Tetric EvoCeram Bulk-Fill), Monoblock with sonic activation (SonicFill2), and incremental technique (Filtek Z250). μ-CT scanning (SkyScan, Bruker, Belgium) assessed the number, volume of closed pores, and total porosity. Analysis of variance on ranks was used (Student-Newman-Keuls method and Mann-Whitney rank-sum test), to determine the significance of RBC viscosity and the sonication placement technique. The Spearman correlation method assessed the correlation between porosity characteristics (α = 0.05). RESULTS The SonicFill2 presented a higher number of closed pores than the other groups (p < 0.05). The overall porosity within the restoration seemed greater in this order: Filtek Z250 > SonicFill2 > Tetric EvoFlow Bulk-Fill + Tetric EvoCeram Bulk-Fill > Tetric EvoCeram Bulk-Fill > SureFil SDR Flow + Ceram.X. Sonication was associated with increased number (p = 0.005) and volume (p = 0.036) of closed pores. A strong correlation was observed between the number and volume of closed pores (R2 = 0.549, p < 001). CONCLUSIONS The monoblock technique with sonic activation showed significantly more internal porosity than the other placement techniques. Sonication during application contributed to the higher number and volume of closed pores than the passive bulk-fill application. CLINICAL RELEVANCE Using bulk-fill materials enhances efficiency, yet void formation remains an issue, depending on viscosity and active/passive delivery of materials. Clinicians must familiarize themselves with effective placement techniques to reduce void formation and optimizing treatment outcomes.
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Affiliation(s)
- Afnan O Al-Zain
- Restorative Dentistry Department, King Abdulaziz University Faculty of Dentistry, P.O. Box 80209, 21589, Jeddah, Saudi Arabia.
- Advanced Technology Dental Research Laboratory, King Abdulaziz University, P.O. Box 80209, 21589, Jeddah, Saudi Arabia.
| | - Lina Baeesa
- Orthodontics Department, King Abdulaziz University Faculty of Dentistry, Jeddah, Saudi Arabia
| | - Elaf Jassoma
- Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, NJ, USA
| | - Maryam A Alghilan
- Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Gaurd Health Affairs, Riyadh, Kingdom of Saudi Arabia
- King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia
| | - Murooj Hariri
- Restorative Dentistry Department, King Fahad General Hospital, 23325, Jeddah, Saudi Arabia
| | - Eman H Ismail
- Department of Clinical Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, 11671, Riyadh, Saudi Arabia
| | - Eliseu A Münchow
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil
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Bilgili Can D, Özarslan M. 3D-2D microleakage assessment of preheated bulk-fill composite resin applied with different parameters: a micro-CT analysis. Odontology 2023; 111:942-952. [PMID: 36973535 DOI: 10.1007/s10266-023-00805-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 03/14/2023] [Indexed: 03/29/2023]
Abstract
This study evaluated microleakage from class II cavities filled with bulk-fill composite preheated to different temperatures, applied at different thicknesses, and with different polymerization modes. A total of 60 mesio-occlusal cavity were drilled into the extracted human third molars at 2 mm and 4 mm thickness. Preheated bulk-fill composite resin (Viscalor; VOCO, Germany) was applied to the cavities at 68 °C and 37 °C after the adhesive resin was applied, and cured using standard and high-power light-curing modes of a VALO light-curing unit. An incrementally applied microhybrid composite was used as the control. The teeth were subjected to 2000 cycles of heating to 55 °C and cooling to 5 °C with a 30-s hold time. Then, they were immersed in a 50% silver nitrate solution for 24 h and scanned with micro-computed tomography. Scanned data were processed using the CTAn software. Two (2D) and three (3D) dimensional analyses of leached silver nitrate were performed. The data's normality was assessed using the Shapiro-Wilk test before comparisons using a three-way analysis of variance. In both 2D and 3D analysis, bulk-fill composite resin preheated to 68 °C and applied at 2 mm thickness showed less microleakage. In the 3D analysis, restorations applied at 37 °C and 4 mm thickness in high-power mode showed significantly higher values (p < 0.001). Preheated bulk-fill composite resin can be applied at 68 °C and effectively cured at both 2 mm and 4 mm thickness.
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Affiliation(s)
- Dilber Bilgili Can
- Department of Restorative Dentistry, Faculty of Dentistry, Van Yuzuncu Yil University, Van, 65080, Turkey.
| | - Merve Özarslan
- Department of Prosthetic Dentistry, Faculty of Dentistry, Akdeniz University, Antalya, Turkey
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Medina-Sotomayor P, Ortega G, Aguilar J, Ordóñez P, Rojas M, Vásquez R. Dental restoration operative time and analysis of the internal gap of conventional resins (Incremental Technique) vs. Bulk Fill (Single-Increment Technique): In vitro study. J Clin Exp Dent 2023; 15:e621-e628. [PMID: 37674607 PMCID: PMC10478196 DOI: 10.4317/jced.60717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 06/04/2023] [Indexed: 09/08/2023] Open
Abstract
Background To determine the operative time and the internal restoration gap in the restoration-tooth interface in the cavity floor using an incremental technique for conventional resins and the single-increment technique for the bulk fill resin. Material and Methods In this in vitro experimental study, the internal gaps of the restoration-tooth interfaces in the cavity floors of two conventional resins and two bulk fill resins were microscopically analyzed, and the restoration times of the single-increment technique and the incremental technique were determined. Results Bulk fill resins had smaller internal gap (63.31 µm) than conventional resins (333.14 µm). Regarding the restoration time, the single-increment technique obtained the best results in operative time (3.52 minutes), with significant differences relative to the incremental technique. Conclusions The Tetric N-Ceram bulk fill resin presented better performance than conventional resins relative to the internal gap of the restoration-tooth interface in the cavity floor. In addition, the single-increment technique presented a short clinical restoration time. Key words:Composite, internal gap, restoration technique.
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Affiliation(s)
| | - Gabriela Ortega
- Universidad Católica de Cuenca, Carrera de Odontología, Campus Universitario Azogues, Ecuador
| | - José Aguilar
- Universidad Católica de Cuenca, Carrera de Odontología, Campus Universitario Azogues, Ecuador
| | - Paola Ordóñez
- Universidad Católica de Cuenca, Carrera de Odontología, Campus Universitario Azogues, Ecuador
| | - Michelle Rojas
- Universidad Católica de Cuenca, Carrera de Odontología, Campus Universitario Azogues, Ecuador
| | - Roxana Vásquez
- Universidad Católica de Cuenca, Carrera de Odontología, Campus Universitario Azogues, Ecuador
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Distefano S, Cannarozzo MG, Spagnuolo G, Bucci MB, Lo Giudice R. The "Dedicated" C.B.C.T. in Dentistry. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:5954. [PMID: 37297558 PMCID: PMC10252385 DOI: 10.3390/ijerph20115954] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 04/14/2023] [Accepted: 05/18/2023] [Indexed: 06/12/2023]
Abstract
This position statement represents a consensus of an expert committee composed by the Italian Academy of General Dentistry (Accademia Italiana Odontoiatria Generale COI-AIOG) and Italian Academy of Legal and Forensic Dentistry (Accademia Italiana di Odontoiatria Legale e Forense OL-F) on the appropriate use of cone beam computed tomography (C.B.C.T.) in dentistry. This paper analyzes the use of C.B.C.T. in light of the rapid evolution of volumetric technologies, with the new low- and ultra-low-dose exposure programs. These upgrades are determining an improvement in the precision and safety of this methodology; therefore, the need of a guideline revision of the use of C.B.C.T. for treatment planning is mandatory. It appears necessary to develop a new model of use, which, in compliance with the principle of justification and as low as reasonably achievable (ALARA) and as low as diagnostically acceptable (ALADA), can allow a functional "Dedicated C.B.C.T." exam optimized for the individuality of the patient.
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Affiliation(s)
| | - Maria Grazia Cannarozzo
- Cenacolo Odontostomatologico Italiano-Associazione Italiana Odontoiatria Generale, 95128 Catania, Italy
| | - Gianrico Spagnuolo
- Department of Neurosciences, Reproductive Sciences and Oral Sciences, University of Naples Federico II, 80138 Naples, Italy
| | - Marco Brady Bucci
- Italian Academy of Legal and Forensic Dentistry (OL-F), 19122 La Spezia, Italy
| | - Roberto Lo Giudice
- Department Clinical and Experimental Medicine, Messina University, 98122 Messina, Italy
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Quinzi V, Orilisi G, Vitiello F, Notarstefano V, Marzo G, Orsini G. A spectroscopic study on orthodontic aligners: First evidence of secondary microplastic detachment after seven days of artificial saliva exposure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 866:161356. [PMID: 36603638 DOI: 10.1016/j.scitotenv.2022.161356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/20/2022] [Accepted: 12/30/2022] [Indexed: 06/17/2023]
Abstract
Clear orthodontic aligners have recently seen increasing popularity. The thermoplastic materials present several advantages, even if it is known that all plastic products can be subjected to environmental and mechanical degradation, leading to the release of microplastics (MPs). Their ingestion could cause oxidative stress and inflammatory lesions. This study aims to evaluate the potential detachment of MPs by clear aligners due to mechanical friction simulated with a 7-day protocol in artificial saliva. The study was performed on orthodontic clear aligners from different manufacturers: Alleo (AL); FlexiLigner (FL); F22 Aligner (F22); Invisalign® (INV); Lineo (LIN); Arc Angel (ARC), and Ortobel Aligner (OR). For each group, two aligners were immersed in artificial saliva for 7 days and stirred for 5 h/day, simulating the physiological teeth mechanical friction. After 7 days, the artificial saliva was filtered; then, filters were analyzed by Raman Microspectroscopy (RMS) and Scanning Electron Microscopy (SEM), respectively to chemically identify the polymeric matrix and to measure the number and size of the detected MPs. RMS spectra revealed that AL, FL, LIN, ARC, and OR aligners were composed by polyethylene terephthalate, while F22 and INV ones by polyurethane. SEM analysis showed that the highest number of MPs was found in ARC and the lowest in INV (p < 0.05). As regards MPs' size, no statistically significant difference was found among groups, with most MPs ranging from 5 to 20 μm. Noteworthy, a highly significant correlation (p < 0.0001) was highlighted between the distribution of MPs size and the different typologies of aligners. This in vitro study highlighted for the first time the detachment of MPs from clear aligners due to mechanical friction. This evidence may represent a great concern in the clinical practice since it could impact human general health.
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Affiliation(s)
- Vincenzo Quinzi
- Università degli Studi dell'Aquila, Dipartimento di Medicina Clinica, Sanità Pubblica, Scienze della Vita e dell'Ambiente, Piazza Salvatore Tommasi, 67100 L'Aquila, Italy
| | - Giulia Orilisi
- Università Politecnica delle Marche, Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche, Via Tronto 10, 60126 Ancona, Italy
| | - Flavia Vitiello
- Università Politecnica delle Marche, Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche, Via Tronto 10, 60126 Ancona, Italy
| | - Valentina Notarstefano
- Università Politecnica delle Marche, Dipartimento di Scienze della Vita e dell'Ambiente, Via Brecce Bianche, 60131 Ancona, Italy
| | - Giuseppe Marzo
- Università degli Studi dell'Aquila, Dipartimento di Medicina Clinica, Sanità Pubblica, Scienze della Vita e dell'Ambiente, Piazza Salvatore Tommasi, 67100 L'Aquila, Italy
| | - Giovanna Orsini
- Università Politecnica delle Marche, Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche, Via Tronto 10, 60126 Ancona, Italy.
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Zotti F, Vincenzi S, Zangani A, Bernardi P, Sbarbati A. Stamp Technique: An Explorative SEM Analysis. Dent J (Basel) 2023; 11:dj11030077. [PMID: 36975574 PMCID: PMC10047887 DOI: 10.3390/dj11030077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/27/2023] [Accepted: 03/02/2023] [Indexed: 03/29/2023] Open
Abstract
BACKGROUND Achieving correct tooth anatomy and saving time at the dental chair are some of the goals of modern restorative dentistry. Stamp technique has gained acceptance in clinical practice. The aim of this study was to evaluate the effectiveness of this technique in terms of microleakage, voids, overhangs and marginal adaptation of Class I restorations, and to analyse the operative times in comparison with traditional restorative procedures. METHODS Twenty extracted teeth were divided into 2 groups. Ten teeth in the study group (SG) were Class I prepared and restored using stamp technique, and ten teeth in the control group (CG) were Class I restored traditionally. SEM analysis was performed to evaluate voids, microleakage, overhangs, and marginal adaptation, and operative times were recorded. A statistical analysis was performed. RESULTS There were no significant differences in microleakage, marginal adaptation and filling defects between the two groups, however, the stamp technique seems to facilitate the formation of large overflowing margins that require a careful finishing phase. CONCLUSIONS Stamp technique does not seem to have any critical aspects in terms of restoration durability and it can be performed in a short time.
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Affiliation(s)
- Francesca Zotti
- Department of Surgical Sciences, Pediatrics and Gynecology, University of Verona, P.le L.A.Scuro, 10, 37134 Verona, Italy
| | | | - Alessandro Zangani
- Department of Surgical Sciences, Pediatrics and Gynecology, University of Verona, P.le L.A.Scuro, 10, 37134 Verona, Italy
| | - Paolo Bernardi
- Department of Neuroscience, Biomedicine and Movement, Human Anatomy and Histology Section, University of Verona, Strada Le Grazie, 8, 37134 Verona, Italy
| | - Andrea Sbarbati
- Department of Neuroscience, Biomedicine and Movement, Human Anatomy and Histology Section, University of Verona, Strada Le Grazie, 8, 37134 Verona, Italy
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Soliman S, Krastl G, Winkler A, Frankenberger R, Hahn B. Influence of the Scalpel Finishing Technique on Marginal Gap Formation in Class II Resin Composite Restorations. Oper Dent 2023; 48:E12-E24. [PMID: 36508720 DOI: 10.2341/22-027-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Modern adhesives and composites allow the restoration of deep defects. In such cases, the matrix technique is particularly challenging, and excess composite is a common problem. Removing such overhangs with a scalpel has already been described as a substance preserving or selective finishing technique. Clinically, restoration margins may appear as a white line after scalpel finishing, and it is unclear whether this line represents a marginal gap and/or whether scalpel finishing promotes marginal gap formation. Therefore, the aim of this study was to investigate the influence of scalpel finishing of deep Class II composite restorations on marginal gap formation. METHODS AND MATERIALS Standardized mesioocclusal-distal (MOD) cavities were prepared and restored in 60 human molars randomly divided into six finishing protocol groups: G1, scalpels (SC); G2, oscillating files (OF); G3, finishing strips (FS); G4, scalpels and finishing strips (SC+FS); G5, scalpels and polishing discs (SC+PD); G6, polishing discs alone (PD, controls). The groups were additionally assigned to finishing and polishing in a phantom head (groups 1-4) or hand-held setting (groups 5-6) to simulate clinical and in-vitro research conditions, respectively. After restoration, artificial aging was performed by thermocycling (5-55°C, 2500 cycles) and mechanical loading (50 newtons (N) with 500,000 cycles) prior to scanning electron microscopy analysis of proximal restoration margin quality on the mesial and distal surfaces (n=120) of each tooth. Outcomes (perfect margin, marginal gap, overhang, marginal fracture) were statistically analyzed by t-test, Mann-Whitney U test, single-factor analysis of variance, post-hoc t-test, Kruskal-Wallis test and Dunn-Bonferroni correction for multiple group comparisons. Cohen's effect size d(Cohen) was calculated to show the strength of the relationship between variables. RESULTS Overall, marginal quality was significantly better in the hand-held setting (SC+PD and PD) than the phantom head setting (SC, OF, FS, SC+FS). The best marginal quality was achieved with oscillating files in the phantom head setting and with scalpels plus polishing discs in the hand-held setting. Marginal gaps occurred significantly more often with scalpels, but the proportion of gaps was very low and clinically insignificant. Finishing strips were the least effective instruments for removing overhangs but performed better in combination with scalpels. CONCLUSIONS Scalpel finishing can effectively and gently remove overhangs from enamel. However, blades should be used with caution as they can cut the dentin and cementum. Scalpel finishing does not lead to a clinically relevant increase in marginal gaps, but should be followed by polishing, whenever possible, to eliminate any marginal fractures that might be present.
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Affiliation(s)
- S Soliman
- *Sebastian Soliman, DMD, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany
| | - G Krastl
- Gabriel Krastl, DMD, professor, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany
| | - A Winkler
- Alexander Winkler, DMD, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany
| | - R Frankenberger
- Roland Frankenberger, DMD, professor, Department of Conservative Dentistry, Dental School, University Hospital Marburg, Marburg, Germany
| | - B Hahn
- Britta Hahn, DMD, University Hospital Würzburg, Department of Conservative Dentistry and Periodontology, Center of Dental Traumatology, Dental School, Würzburg, Germany
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Marzeddu S, Décima MA, Camilli L, Bracciale MP, Genova V, Paglia L, Marra F, Damizia M, Stoller M, Chiavola A, Boni MR. Physical-Chemical Characterization of Different Carbon-Based Sorbents for Environmental Applications. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15207162. [PMID: 36295233 PMCID: PMC9607634 DOI: 10.3390/ma15207162] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 05/14/2023]
Abstract
Biochar has been used in various applications, e.g., as a soil conditioner and in remediation of contaminated water, wastewater, and gaseous emissions. In the latter application, biochar was shown to be a suitable alternative to activated carbon, providing high treatment efficiency. Since biochar is a by-product of waste pyrolysis, its use allows for compliance with circular economics. Thus, this research aims to obtain a detailed characterization of three carbonaceous materials: an activated carbon (CARBOSORB NC 1240®) and two biochars (RE-CHAR® and AMBIOTON®). In particular, the objective of this work is to compare the properties of three carbonaceous materials to evaluate whether the application of the two biochars is the same as that of activated carbon. The characterization included, among others, particle size distribution, elemental analysis, pH, scanning electron microscope, pore volume, specific surface area, and ionic exchange capacity. The results showed that CARBOSORB NC 1240® presented a higher specific surface (1126.64 m2/g) than AMBIOTON® (256.23 m2/g) and RE-CHAR® (280.25 m2/g). Both biochar and activated carbon belong to the category of mesoporous media, showing a pore size between 2 and 50 nm (20-500 Å). Moreover, the chemical composition analysis shows similar C, H, and N composition in the three carbonaceous materials while a higher O composition in RE-CHAR® (9.9%) than in CARBOSORB NC 1240 ® (2.67%) and AMBIOTON® (1.10%). Differences in physical and chemical properties are determined by the feedstock and pyrolysis or gasification temperature. The results obtained allowed to compare the selected materials among each other and with other carbonaceous adsorbents.
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Affiliation(s)
- Simone Marzeddu
- Department of Civil, Constructional and Environmental Engineering (DICEA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
- Correspondence: ; Tel.: +39-06-44585514
| | - María Alejandra Décima
- Department of Civil, Constructional and Environmental Engineering (DICEA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Luca Camilli
- Department of Civil, Constructional and Environmental Engineering (DICEA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Maria Paola Bracciale
- Department of Chemical Engineering Materials Environment (DICMA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Virgilio Genova
- Department of Chemical Engineering Materials Environment (DICMA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Laura Paglia
- Department of Chemical Engineering Materials Environment (DICMA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Francesco Marra
- Department of Chemical Engineering Materials Environment (DICMA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Martina Damizia
- Department of Chemical Engineering Materials Environment (DICMA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Marco Stoller
- Department of Chemical Engineering Materials Environment (DICMA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Agostina Chiavola
- Department of Civil, Constructional and Environmental Engineering (DICEA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
| | - Maria Rosaria Boni
- Department of Civil, Constructional and Environmental Engineering (DICEA), Faculty of Civil and Industrial Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
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9
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Carrillo-Marcos A, Salazar-Correa G, Castro-Ramirez L, Ladera-Castañeda M, López-Gurreonero C, Cachay-Criado H, Aliaga-Mariñas A, Cornejo-Pinto A, Cervantes-Ganoza L, Cayo-Rojas CF. The Microhardness and Surface Roughness Assessment of Bulk-Fill Resin Composites Treated with and without the Application of an Oxygen-Inhibited Layer and a Polishing System: An In Vitro Study. Polymers (Basel) 2022; 14:polym14153053. [PMID: 35956567 PMCID: PMC9370367 DOI: 10.3390/polym14153053] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/16/2022] [Accepted: 07/25/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to assess the microhardness and surface roughness of bulk-fill resin composites treated with and without the application of an oxygen-inhibited layer (OIL) and a polishing system. This in vitro experimental study consisted of 72 resin composite blocks divided into three groups: Tetric N-Ceram Bulk Fill, Opus Bulk Fill APS, and Filtek Bulk Fill. Each resin composite group was further divided into two subgroups: with and without OIL control. Subsequently, surface roughness and microhardness were measured before and after polishing. A t-test was used to compare independent and related measures. For the intergroup comparison of variation before and after polishing, the Kruskal−Wallis test with Bonferroni post hoc was used considering a significance level of p < 0.05. When comparing surface roughness, significant differences were observed between Opus Bulk Fill resin composite with and without OIL control (p = 0.003) before polishing. The same occurred when comparing Tetric N-Ceram resin composite with and without OIL control (p = 0.039) after polishing. In addition, the surface roughness of Filtek Bulk Fill, Opus Bulk Fill, and Tetric N-Ceram Bulk Fill resin composites, with and without OIL control, decreased significantly after polishing (p < 0.001), while surface microhardness significantly increased (p < 0.05), with the exception of Opus Bulk Fill resin with OIL control (p = 0.413). In conclusion, OIL control and polishing significantly improved the surface roughness and surface microhardness of Filtek Bulk Fill and Tetric N-Ceram Bulk Fill resin composites. However, in the case of Opus Bulk Fill resin composite, only its surface roughness was significantly improved.
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Affiliation(s)
- Ann Carrillo-Marcos
- School of Stomatology, Universidad Privada San Juan Bautista, 15066 Lima, Peru; (A.C.-M.); (G.S.-C.); (L.C.-R.); (H.C.-C.); (A.C.-P.)
| | - Giuliany Salazar-Correa
- School of Stomatology, Universidad Privada San Juan Bautista, 15066 Lima, Peru; (A.C.-M.); (G.S.-C.); (L.C.-R.); (H.C.-C.); (A.C.-P.)
| | - Leonor Castro-Ramirez
- School of Stomatology, Universidad Privada San Juan Bautista, 15066 Lima, Peru; (A.C.-M.); (G.S.-C.); (L.C.-R.); (H.C.-C.); (A.C.-P.)
| | - Marysela Ladera-Castañeda
- “Grupo de Investigación Salud y Bienestar Global”, Faculty of Dentistry and Postgraduate School, Universidad Nacional Federico Villarreal, 15001 Lima, Peru; (M.L.-C.); (A.A.-M.)
| | | | - Hernán Cachay-Criado
- School of Stomatology, Universidad Privada San Juan Bautista, 15066 Lima, Peru; (A.C.-M.); (G.S.-C.); (L.C.-R.); (H.C.-C.); (A.C.-P.)
| | - Ana Aliaga-Mariñas
- “Grupo de Investigación Salud y Bienestar Global”, Faculty of Dentistry and Postgraduate School, Universidad Nacional Federico Villarreal, 15001 Lima, Peru; (M.L.-C.); (A.A.-M.)
| | - Alberto Cornejo-Pinto
- School of Stomatology, Universidad Privada San Juan Bautista, 15066 Lima, Peru; (A.C.-M.); (G.S.-C.); (L.C.-R.); (H.C.-C.); (A.C.-P.)
- “Grupo de Investigación Salud y Bienestar Global”, Faculty of Dentistry and Postgraduate School, Universidad Nacional Federico Villarreal, 15001 Lima, Peru; (M.L.-C.); (A.A.-M.)
| | | | - César Félix Cayo-Rojas
- School of Stomatology, Universidad Privada San Juan Bautista, 15066 Lima, Peru; (A.C.-M.); (G.S.-C.); (L.C.-R.); (H.C.-C.); (A.C.-P.)
- Correspondence:
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AlQussier A, Awliya W. Effect of Erbium, Chromium-doped: Yttrium, Scandium, Gallium and Garnet Laser Tooth Preparation on Gap Formation of Universal Adhesive Bonded to Enamel and Dentin: A Micro-CT and SEM Study. J Lasers Med Sci 2022; 13:e14. [DOI: 10.34172/jlms.2022.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 01/08/2022] [Indexed: 11/09/2022]
Abstract
Introduction: The presence of gaps at the bonding interface of resin composite restorations is known to have an impact on restoration longevity. This study aimed to evaluate the effect of erbium, chromium-doped yttrium, scandium, gallium, and garnet (Er, Cr:YSGG) laser irradiation on gap formation at the tooth–resin interface and to compare the reliability of micro-computed tomography (µCT) and scanning electron microscopy (SEM) scans for gap formation assessment. Methods: Thirty standardized non-retentive class V cavities were prepared on sound human premolars using either an Er,Cr:YSGG laser or a round carbide bur (n=15 for each). A universal adhesive and A nano-filled resin composite were applied in accordance with the manufacturer’s recommendations. After water storage for 24 hours at 37°C, the teeth were subjected to thermocycling. Gap formation assessments were performed by µCT (Skyscan 1173 µCT, Brucker, Belgium) and SEM (JEOL JSM-6610LV, Japan), and SPSS version 24.0 (IBM Inc., Chicago, USA) was used to analyze the data at P value<0.05. Descriptive statistics were used to describe the gap formation percentages. To compare the impact of both preparation and assessment methods, a non-parametric Mann–Whitney U test was used. Results: In enamel, similar gap formation values were detected for the two preparation methods (bur and laser). However, the laser-prepared group showed higher gap formation values in dentin. Additionally, higher gap formation values were reported for both preparation methods when µCT was used for assessment. Conclusion: Cavity preparation using a Waterlase laser led to higher gap formation percentages at the dentin–resin interface. In addition, SEM assessment is more reliable for assessing the tooth–resin interface.
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Affiliation(s)
- Anfal AlQussier
- DScD Student at King Saud University, and Lecturer at Majmaah University, Riyadh, Kingdom of Saudi Arabia
| | - Wedad Awliya
- Professor at King Saud University, Riyadh, Kingdom of Saudi Arabia
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Oglakci B, Burduroğlu D, Eriş AH, Mayadağlı A, Arhun N. The Effect of Radiotherapy on the Marginal Adaptation of Class II Direct Resin Composite Restorations: A Micro-computed Tomography Analysis. Oper Dent 2022; 47:43-54. [PMID: 35226728 DOI: 10.2341/20-066-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2021] [Indexed: 12/24/2022]
Abstract
This laboratory study was designed to evaluate the marginal adaptation of Class II mesio-occluso-distal (MOD) restorations at the cervical region with micro-computed tomography (micro-CT). Two groups of restorations were compared: 1) those that had been exposed to radiotherapy before restoration was performed using a universal adhesive in etch-and-rinse and self-etch modes; and 2) those that had previously been restored using a universal adhesive in etch-and-rinse and self-etch modes and had subsequently undergone radiotherapy. Sixty intact human molars were randomly divided into groups according to irradiation status: no radiotherapy (control group); radiotherapy followed by restoration (radiotherapy-first group); and restoration followed by radiotherapy (restoration-first group). These three groups were then subdivided into two groups each on the basis of adhesive application type (etch-and-rinse and self-etch modes), for a total of six groups (n=10/group). Standardized Class II MOD cavities were prepared. A universal adhesive (Clearfil Universal Bond Quick, Kuraray, Okayama, Japan) was applied. The teeth were restored with resin composite (Estelite Posterior Quick, Tokuyama, Tokyo, Japan). The radiotherapy protocol was conducted with 60 gray (Gy) at 2 Gy/day, five days a week for six weeks. Adhesive defects were analyzed in distal and mesial views and evaluated with micro-CT (SkyScan 1174v2, Kontich, Antwerp, Belgium) on the basis of the volume of black spaces between the cavity walls and the restorative materials (mm3). The data were analyzed using the Kruskal-Wallis, Mann Whitney U and Wilcoxon tests (p<0.05). The radiotherapy protocol did not affect the marginal adaptation of the universal adhesive at the cervical regions. Regarding the application modes, for the radiotherapy-first group, the self-etch mode caused significantly higher adhesive defects than the etch-and-rinse mode at the dentin margin. For the no-radiotherapy group, the adhesive defects at the dentin margin were significantly higher than at the enamel margin with the application of the etch-and-rinse mode.
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Affiliation(s)
- B Oglakci
- *Burcu Oglakci, DDS, assistant professor, Bezmialem Vakif University Faculty of Dentistry, Department of Restorative Dentistry, Istanbul, Turkey
| | - D Burduroğlu
- Defne Burduroğlu, DDS, PhD, prosthetic dentistry specialist, Bezmialem Vakif University, Faculty of Dentistry, Department of Prosthetic Dentistry, Istanbul, Turkey
| | - A H Eriş
- Ali Hikmet Eriş, medical radiophysic specialist, Bezmialem Vakif University, Faculty of Medicine, Department of Radiation Oncology, Istanbul, Turkey
| | - A Mayadağlı
- Alpaslan Mayadağlı, MD, professor, Bezmialem Vakif University, Faculty of Medicine, Department of Radiation Oncology, Istanbul, Turkey
| | - N Arhun
- Neslihan Arhun, DDS, PhD, professor, Başkent University Faculty of Dentistry, Department of Restorative Dentistry, Ankara, Turkey
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Abdelwahed AG, Essam S, Abdelaziz MM. Marginal Adaptation and Depth of Cure of Flowable versus Packable Bulk-fill Restorative Materials: An In Vitro StudyMarginal Adaptation and Depth of Cure of Flowable versus Packable Bulk-fill Restorative Materials: An In Vitro Study. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.8353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aim: To investigate the marginal adaptation and depth of cure of a flowable bulk-fill giomer (BEAUTIFIL Flow Plus X [BFP]), a flowable bulk-fill resin composite (PALFIQUE BULK FLOW [PBF]) bulk-fill resin composite, a packable bulk-fill giomer (BEAUTIFL-Bulk Restorative [BBR]), and two packable bulk-fill resin composites (X-tra fil [XF]) and (Filtek™ One Bulk Fill Restorative [FOB]).
Materials and Methods: Twenty-five standardized class II cavities were prepared in the occlusomesial surfaces of maxillary premolars. A self-etching dental adhesive was used. All restorative materials were applied, and light cured according to their manufacturer's instructions. The teeth were subjected to 2500 thermal cycles between 5° C and 55° C. Epoxy resin replicas were obtained to examine the marginal by calculating the percentage of the continuous margin over the total margin length. using SEM at 200× magnification. For assessing the depth of cure, fifty specimens with 4 mm height were prepared. Vickers microhardness testing was used to assess the depth of cure was calculating the bottom-to-top ratio of each specimen. If this ratio reaches 0.80 or more, an adequate depth of cure is achieved.
Results: Regarding marginal adaptation, there was no significant difference between different groups before (p=0.398) and after (p=0.644) thermocycling. Within all groups, there was a significant decrease in marginal adaptation after thermocycling (p<0.001). Regarding the depth of cure, all restorative materials achieved the required 0.8 bottom-to-top ratio. There was a significant difference between different groups (p<0.001). The highest value was found in BFP group (0.97±0.02), while the lowest value was found in BBR group (0.81±0.11).
Conclusions: The marginal adaptation and depth of cure of bulk-fill giomer restorative materials are acceptable. Therefore, their use in restoration of 4-mm deep class II cavities is appealing.
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Ghavami-Lahiji M, Davalloo RT, Tajziehchi G, Shams P. Micro-computed tomography in preventive and restorative dental research: A review. Imaging Sci Dent 2022; 51:341-350. [PMID: 34987994 PMCID: PMC8695474 DOI: 10.5624/isd.20210087] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/04/2021] [Accepted: 07/09/2021] [Indexed: 01/15/2023] Open
Abstract
Purpose The use of micro-computed tomography (micro-CT) scans in biomedical and dental research is growing rapidly. This study aimed to explore the scientific literature on approaches and applications of micro-CT in restorative dentistry. Materials and Methods An electronic search of publications from January 2009 to March 2021 was conducted using ScienceDirect, PubMed, and Google Scholar. The search included only English-language articles. Therefore, only studies that addressed recent advances and the potential uses of micro-CT in restorative and preventive dentistry were selected. Results Micro-CT is a tool that enables 3-dimensional imaging on a small scale with very high resolution. In this method, there is no need for sample preparation or slicing. Therefore, it is possible to examine the internal structure of tissue and the internal adaptation of materials to surfaces without destroying them. Due to these advantages, micro-CT has been recommended as a standard imaging tool in dental research for many applications such as tissue engineering, endodontics, restorative dentistry, and research on the mineral density of hard tissues and bone growth. However, the high costs of micro-CT, the time necessary for scanning and reconstruction, computer expertise requirements, and the enormous volume of information are drawbacks. Conclusion The potential of micro-CT as an emerging, accurate, non-destructive approach is clear, and the valuable research findings reported in the literature provide an impetus for researchers to perform future studies focusing on employing this method in dental research.
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Affiliation(s)
- Mehrsima Ghavami-Lahiji
- Dental Sciences Research Center, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.,Department of Restorative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Reza Tayefeh Davalloo
- Department of Restorative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Gelareh Tajziehchi
- Department of Restorative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Paria Shams
- Department of Restorative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
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Tosco V, Monterubbianesi R, Furlani M, Giuliani A, Putignano A, Orsini G. Micro-computed tomography for assessing the internal and external voids of bulk-fill composite restorations: A technical report. Imaging Sci Dent 2022; 52:303-308. [PMID: 36238708 PMCID: PMC9530296 DOI: 10.5624/isd.20220007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 04/13/2022] [Accepted: 04/27/2022] [Indexed: 11/18/2022] Open
Abstract
Purpose Materials and Methods Results Conclusion
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Affiliation(s)
- Vincenzo Tosco
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - Riccardo Monterubbianesi
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - Michele Furlani
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - Alessandra Giuliani
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - Angelo Putignano
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - Giovanna Orsini
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
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Vibrational Imaging Techniques for the Characterization of Hard Dental Tissues: From Bench-Top to Chair-Side. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112411953] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Currently, various analytical techniques, including scanning electron microscopy, X-Ray diffraction, microcomputed tomography, and energy dispersive X-ray spectroscopy, are available to study the structural or elemental features of hard dental tissues. In contrast to these approaches, Raman Microspectroscopy (RMS) has the great advantage of simultaneously providing, at the same time and on the same sample, a morpho-chemical correlation between the microscopic information from the visual analysis of the sample and its chemical and macromolecular composition. Hence, RMS represents an innovative and non-invasive technique to study both inorganic and organic teeth components in vitro. The aim of this narrative review is to shed new light on the applicative potential of Raman Microspectroscopy in the dental field. Specific Raman markers representative of sound and pathological hard dental tissues will be discussed, and the future diagnostic application of this technique will be outlined. The objective and detailed information provided by this technique in terms of the structure and chemical/macromolecular components of sound and pathological hard dental tissues could be useful for improving knowledge of several dental pathologies. Scientific articles regarding RMS studies of human hard dental tissues were retrieved from the principal databases by following specific inclusion and exclusion criteria.
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Putignano A, Tosco V, Monterubbianesi R, Vitiello F, Gatto ML, Furlani M, Giuliani A, Orsini G. Comparison of three different bulk-filling techniques for restoring class II cavities: μCT, SEM-EDS combined analyses for margins and internal fit assessments. J Mech Behav Biomed Mater 2021; 124:104812. [PMID: 34500356 DOI: 10.1016/j.jmbbm.2021.104812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/30/2021] [Accepted: 09/02/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Evaluation of the behavior of three different bulk-filling techniques in terms of internal adaptation and external marginal sealing for restoring class II cavities. METHODS Fifteen extracted sound molar teeth were used. Two standardized class II mesio/disto-occlusal (MO/DO) slot cavities, 4 mm long, 4 mm wide and 3 mm deep were prepared in each tooth, obtaining n=30 cavity preparations. The cavities were randomly assigned into three groups (n=10 per group) according to three bulk filling techniques: Bulk Traditional (BT), Bulk&Go (BG) and Bulk&Flow (BF). The teeth were analyzed by scanning electron microscopy (SEM) to investigate the external marginal seal. Thereafter, the chemical composition of tooth-restoration interface was analyzed by energy-dispersive X-ray spectroscopy (EDS). Complementary information to the SEM and EDS were obtained by micro-computed tomography (μCT) to assess the internal fit. RESULTS SEM analysis showed a proper external marginal seal for all groups tested as confirmed by the EDS investigation, highlighting the presence of adhesive layer at the tooth-restoration interface. The internal marginal adaptation by means of μCT analysis revealed gaps formation at the tooth-restoration interface only for BT group, while an intimate contact free of gaps were found in the other two groups. Moreover, in BT and BF groups voids were present within the restoration. SIGNIFICANCE BG and BF techniques can be considered as reliable alternatives to BT technique, as they simplify the class II restoration without transforming it into class I, thus ensuring a successful result.
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Affiliation(s)
- Angelo Putignano
- Department of Clinical Sciences and Stomatology (DISCO), Polytechnic University of Marche, Via Toronto 10/a, 60126, Ancona, Italy.
| | - Vincenzo Tosco
- Department of Clinical Sciences and Stomatology (DISCO), Polytechnic University of Marche, Via Toronto 10/a, 60126, Ancona, Italy.
| | - Riccardo Monterubbianesi
- Department of Clinical Sciences and Stomatology (DISCO), Polytechnic University of Marche, Via Toronto 10/a, 60126, Ancona, Italy.
| | - Flavia Vitiello
- Department of Clinical Sciences and Stomatology (DISCO), Polytechnic University of Marche, Via Toronto 10/a, 60126, Ancona, Italy.
| | - Maria Laura Gatto
- Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Polytechnic University of Marche, Via Brecce Bianche 12, 60131, Ancona, Italy.
| | - Michele Furlani
- Department of Clinical Sciences and Stomatology (DISCO), Polytechnic University of Marche, Via Toronto 10/a, 60126, Ancona, Italy.
| | - Alessandra Giuliani
- Department of Clinical Sciences and Stomatology (DISCO), Polytechnic University of Marche, Via Toronto 10/a, 60126, Ancona, Italy.
| | - Giovanna Orsini
- Department of Clinical Sciences and Stomatology (DISCO), Polytechnic University of Marche, Via Toronto 10/a, 60126, Ancona, Italy.
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Assessment of the Potential Ability to Penetrate into the Hard Tissues of the Root of an Experimental Preparation with the Characteristics of a Dental Infiltratant, Enriched with an Antimicrobial Component-Preliminary Study. MATERIALS 2021; 14:ma14195654. [PMID: 34640046 PMCID: PMC8510063 DOI: 10.3390/ma14195654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 01/26/2023]
Abstract
Infiltration is a method of penetration with a low viscosity resin that penetrates deep into demineralised tooth tissue and fills the intergranular spaces, hence reducing porosity. Carious lesions initially located at the enamel–cement junction are usually found in elderly patients. Those spots are predisposed to bacterial adhesion originating both from biofilm and from gingival pocket bacteria. The aim of this study was to evaluate the penetration of an experimental preparation, which has the characteristics of a dental infiltrant, enriched with an antibacterial component, into the decalcified root cement tissues of extracted human teeth in elderly patients. An experimental preparation with the characteristics of a dental infiltrant was prepared, applied, and polymerised on the surface of extracted, previously decalcified human teeth. The control sample was Icon (DMG, Hamburg, Germany). The ability of the preparations to penetrate deep into the root cement was evaluated using scanning electron and light microscopy. The study showed that an experimental preparation could potentially be used for treatment of early carious lesions within the tooth root in elderly patients, among others, as it penetrates deep into demineralised tissues. More research is needed.
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Seredin P, Goloshchapov D, Ippolitov Y, Vongsvivut J. Engineering of a Biomimetic Interface between a Native Dental Tissue and Restorative Composite and Its Study Using Synchrotron FTIR Microscopic Mapping. Int J Mol Sci 2021; 22:6510. [PMID: 34204524 PMCID: PMC8233930 DOI: 10.3390/ijms22126510] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/13/2021] [Accepted: 06/14/2021] [Indexed: 01/04/2023] Open
Abstract
The aim of this work is to develop a biomimetic interface between the natural tooth tissue and the restorative composite and to study it on the basis of synchrotron micro-FTIR mapping and multidimensional processing of the spectral data array. Using hierarchical cluster analysis of 3D FTIR data revealed marked improvements in the formation of the dentine/adhesive/dental hybrid interface using a biomimetic approach. The use of a biomimetic strategy (application of an amino acid-modified primer, alkaline calcium and a nano-c-HAp-modified adhesive) allowed the formation of a matrix that can be structurally integrated with natural dentine and dental composite. The biomimetic hybrid layer was characterised by homogeneous chemical composition and a higher degree of conversion of the adhesive during polymerisation, which should provide optimal integration of the dental composite with the dentine.
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Affiliation(s)
- Pavel Seredin
- Solid State Physics and Nanostructures Department, Voronezh State University, University sq.1, 394018 Voronezh, Russia;
- Scientific and Educational Center “Nanomaterials and Nanotechnologies”, Ural Federal University named after the first President of Russia B. N. Yeltsin, Mir av., 620002 Yekaterinburg, Russia
| | - Dmitry Goloshchapov
- Solid State Physics and Nanostructures Department, Voronezh State University, University sq.1, 394018 Voronezh, Russia;
| | - Yuri Ippolitov
- Department of Pediatric Dentistry with Orthodontia, Voronezh State Medical University, Studentcheskaya st. 11, 394006 Voronezh, Russia;
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Matuda AGN, Silveira MPM, de Andrade GS, Piva AMDOD, Tribst JPM, Borges ALS, Testarelli L, Mosca G, Ausiello P. Computer Aided Design Modelling and Finite Element Analysis of Premolar Proximal Cavities Restored with Resin Composites. MATERIALS 2021; 14:ma14092366. [PMID: 34062936 PMCID: PMC8125402 DOI: 10.3390/ma14092366] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/22/2022]
Abstract
This study evaluated the stress distribution in five different class II cavities of premolar models restored with conventional or bulk-fill flowable composite by means of finite element analysis (FEA) under shrinkage and occlusal loading. An upper validated premolar model was imported in the software, and five class II cavities with different occlusal extensions and dimensions were prepared: horizontal cavity on the mesial surface (horizontal slot), mesio-occlusal cavity, mesial cavity (vertical slot), tunnel type cavity and direct access cavity. The models were restored with conventional or bulk-fill flowable resin composite. The tested materials were considered as homogeneous, linear, and isotropic. The Maximum Principal Stress criteria was chosen to evaluate the tensile stress results. The lowest shrinkage stress value was observed in the direct access cavity restored with bulk-fill flowable resin composite (36.12 MPa). The same cavity, restored with conventional composite showed a score of 36.14 MPa. The horizontal slot cavity with bulk-fill flowable showed a score of 46.71 MPa. The mesio-occlusal cavity with bulk-fill flowable had a score of 53.10 MPa, while with conventional composite this was 55.35 MPa. Higher shrinkage stress was found in the vertical slot cavity with conventional resin 56.14 MPa, followed by the same cavity with bulk-fill flowable 56.08 MPa. Results indicated that the use of bulk-fill flowable composite resin more significantly decreased the polymerization shrinkage stress magnitude. The larger the cavity and the volume of material necessary to restore the tooth, the greater the residual stress on enamel and dentin tissue.
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Affiliation(s)
- Amanda Guedes Nogueira Matuda
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP 12245-000, Brazil; (A.G.N.M.); (M.P.M.S.); (G.S.d.A.); (A.M.d.O.D.P.); (A.L.S.B.)
| | - Marcos Paulo Motta Silveira
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP 12245-000, Brazil; (A.G.N.M.); (M.P.M.S.); (G.S.d.A.); (A.M.d.O.D.P.); (A.L.S.B.)
| | - Guilherme Schmitt de Andrade
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP 12245-000, Brazil; (A.G.N.M.); (M.P.M.S.); (G.S.d.A.); (A.M.d.O.D.P.); (A.L.S.B.)
| | - Amanda Maria de Oliveira Dal Piva
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP 12245-000, Brazil; (A.G.N.M.); (M.P.M.S.); (G.S.d.A.); (A.M.d.O.D.P.); (A.L.S.B.)
| | | | - Alexandre Luiz Souto Borges
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP 12245-000, Brazil; (A.G.N.M.); (M.P.M.S.); (G.S.d.A.); (A.M.d.O.D.P.); (A.L.S.B.)
| | - Luca Testarelli
- Department of Oral and Maxillo Facial Sciences, “Sapienza” University of Rome, 00161 Rome, Italy;
| | - Gabriella Mosca
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Dentistry, University of Naples Federico II, 80138 Naples, Italy;
| | - Pietro Ausiello
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Dentistry, University of Naples Federico II, 80138 Naples, Italy;
- Correspondence:
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Surface Integrity of Dimethacrylate Composite Resins with Low Shrinkage Comonomers. MATERIALS 2021; 14:ma14071614. [PMID: 33810268 PMCID: PMC8037145 DOI: 10.3390/ma14071614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/22/2021] [Accepted: 03/22/2021] [Indexed: 11/17/2022]
Abstract
The goal of current research was to investigate the influence of adding low shrinkage “Phene” like comonomers hexaethylene glycol bis(carbamate-isoproply-α-methylstyrene) (HE-Phene) and triethylene glycol bis(carbamate-isoproply-α-methylstyrene) (TE-Phene) on the surface and color characteristics of composite resin. A range of weight fractions (0, 10, 20, 30, 40 wt.%) of HE/TE-Phene monomers were mixed with bisphenol A glycidyl methacrylate (GMA)/triethylene glycol dimethacrylate (TEGDMA) monomer. Experimental composite resins were made by mixing 71 wt.% of silica fillers to 29 wt.% of the resin matrix. A Vickers indenter and glossmeter were used for testing surface hardness (SH) and gloss (SG) at 60°. A chewing-simulator was used to evaluate the surface wear after 15,000 cycles. Color change (∆E) and translucency parameter (TP) were measured using a spectrophotometer. Data showed that HE/TE-Phene monomer had no negative impact (p > 0.05) on surface gloss, wear, color change and translucency of experimental composite resins. Surface hardness was in a reducing direction with the increas in HE/TE-Phene weight fraction (p < 0.05). The study results suggested that incorporating HE/TE-Phene monomers up to 30 wt.% with Bis-GMA/TEGDMA resin did not negatively influence the surface integrity of composite resins except for SH.
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