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Citta M, Anovazzi G, Basso FG, Scheffel D, Zhou J, Pashley DH, Souza Costa CA, Hebling J. Mechanical Stability and Proteolytic Activity of Resin-dentin Bonds Using the Cross-linked Dry Bonding Technique. Oper Dent 2021; 46:E251-E263. [PMID: 34919726 DOI: 10.2341/20-016-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the mechanical stability and the proteolytic activity of bonds created by a two-step, etch-and-rinse adhesive applied to cross-linked and air-dried etched dentin. METHODS Flat dentin surfaces were produced in 64 extracted sound human molars. The dentin was etched with 35% phosphoric acid for 15 seconds, and then the teeth were divided into groups according to the cross-linking solution applied on the etched dentin. Group 1: 5% grape seed extract (GSE), Group 2: 5% glutaraldehyde, Group 3: Gluma Desensitizer, or Group 4: deionized water (control). Solutions were applied for 60 seconds, followed by rinse and blot drying. Then, the teeth were separated into two subgroups where the etched dentin was kept moist or air-dried. The adhesive was applied followed by a composite resin buildup. After 24 hours, the teeth were cut into beams (0.81 mm2) that were tested for microtensile strength immediately or after 12 months of aging in a 37°C saliva-like buffer. Additional teeth (n=32) were bonded as described and cut into 0.5-mm-thick slabs. The slabs were prepared for nanoleakage (scanning electron microscopy) and in situ zymography (EnzChek Protease Assay Kit). Bond strength data were submitted to ANOVA and Tukey tests (α=0.05). RESULTS Significant reduction in immediate bond strength (ca 65%) and increase in proteolytic activity was seen when the etched dentin was air dried without previous cross-linking biomodification. Conversely, bond strengths did not differ from those produced on wet dentin when collagen was cross-linked before air drying, irrespective of the solution applied. For both moist and air-dried etched dentin, collagen cross-linking resulted in mechanically stable bonds and reduced proteolytic activity after 12 months of storage. CONCLUSION Bonds produced by the application of a two-step, etch-and-rinse adhesive to cross-linked, air-dried, etched dentin were mechanically stable and revealed reduced proteolytic activity after 1 year of aging.
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Affiliation(s)
- M Citta
- Mariana Citta, DDS, MSc, Department of Oral Rehabilitation, Sao Paulo State University (UNESP), School of Dentistry, SP, Brazil
| | - G Anovazzi
- Giovana Anovazzi, DDS, MSc, PhD, Department of Orthodontics and Pediatric Dentistry, Sao Paulo State University (UNESP), School of Dentistry, SP, Brazil
| | - F G Basso
- Fernanda Gonçalves Basso, DDS, MSc, PhD, Department of Oral Rehabilitation, Sao Paulo State University (UNESP), School of Dentistry, SP, Brazil
| | - Dls Scheffel
- Débora Lopes Salles Scheffel, DDS, MSc, PhD, Department of Dentistry, State University of Maringá, School of Dentistry, PR, Brazil
| | - J Zhou
- Jianfeng Zhou, DMD, PhD, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - D H Pashley
- David Henry Pashley, DMD, PhD, Department of Oral Biology, The Dental College of Georgia, Augusta University, Augusta, GA, United States
| | - C A Souza Costa
- Carlos Alberto de Souza Costa, DDS, MSc, PhD, Department of Physiology and Pathology, Sao Paulo State University (UNESP), School of Dentistry, SP, Brazil
| | - J Hebling
- *Josimeri Hebling, DDS, MSc, PhD, Department of Orthodontics and Pediatric Dentistry, Sao Paulo State University (UNESP), School of Dentistry, SP, Brazil
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Zimmer R, Leite ML, de Souza Costa CA, Hebling J, Anovazzi G, Klein CA, Hosaka K, Reston ED. Effect of Time and Temperature of Air Jet on the Mechanical and Biological Behavior of a Universal Adhesive System. Oper Dent 2021; 47:87-96. [PMID: 34624102 DOI: 10.2341/20-038-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To evaluate the influence of heat application on the degree of conversion (DC) of the 3M Single Bond Universal Adhesive System, as well as its transdentinal cytotoxicity and microtensile bond strength to dentin. METHODS Experimental groups were established according to the time and temperature of the air jet: G1: 5 seconds-25°C; G2: 10 seconds-25°C; G3: 20 seconds-25°C; G4: 5 seconds-50°C; G5: 10 seconds-50°C; G6: 20 seconds-50°C. In control group (G7), no treatment was performed. The DC was assessed using the Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR) technique. For the transdentinal cytotoxicity test, dentin discs fitted in artificial pulp chambers (APC) received the application of the adhesive system and the air jets. For the microtensile bond strength, healthy molars were restored and submitted to the microtensile test after 24 hours and 6 months, respectively. RESULTS Significant reduction in viability of Mouse Dental Papilla Cell-23 (MDPC-23), which exhibited morphological changes, was observed in all experimental groups compared to control (p<0.05). Although all tested protocols resulted in transdentinal diffusion of 2-hydroxyethyl methacrylate (HEMA), the group G6 presented the highest degree of monomeric conversion and the lowest cytotoxic effect, with higher dentin bond strength values in comparison to group G1 (p<0.05). CONCLUSIONS Applying an air blast at 50°C for 20 seconds increases the DC and microtensile bond strength of the 3M Single Bond Universal Adhesive System to dentin, as well as reduces the transdentinal cytotoxicity of the material to pulp cells.
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Affiliation(s)
- R Zimmer
- Roberto Zimmer, DDS, MS, Department of Operative Dentistry, School of Dentistry, Lutheran University of Brazil (Ulbra), Canoas, Brazil
| | - M L Leite
- Maria Luisa Leite, DDS, MS, PhD, Department of Physiology and Pathology, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, Brazil
| | - C A de Souza Costa
- Carlos Alberto de Souza Costa, DDS, MS, PhD, Department of Physiology and Pathology, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, Brazil
| | - J Hebling
- Josimeri Hebling, DDS, MS, PhD, Department of Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, Brazil
| | - G Anovazzi
- Giovana Anovazzi, DDS, MS, PhD, Department of Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, Brazil
| | - C A Klein
- Celso Afonso Klein-Junior, DDS, MS, PhD, Department of Operative Dentistry, School of Dentistry, Lutheran University of Brazil (Ulbra), Canoas, Brazil
| | - K Hosaka
- Keiichi Hosaka, DDS, MS, PhD, Department of Cariology and Operative Dentistry,Graduate School of Medical and Dental Sciences,Tokyo Medical and Dental University, Tokyo, Japan
| | - E D Reston
- *Eduardo Galia Reston, DDS, MSD, PhD, Department of Operative Dentistry, School of Dentistry, Lutheran University of Brazil (Ulbra), Canoas, Brazil
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Duque C, Soares D, Leite M, Anovazzi G, Zuta U, Bordini E, Hebling J, De Souza Costa C. Aesthetic and biological analysis of an experimental tooth-bleaching gel. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Anovazzi G, Scheffel D, Soares D, Bordini E, De-Souza-Costa C, Hebling J. MMP gene expression and bond strength to proanthocyanidin-biomodified air-dried dentin. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Gomes L, Citta M, Anovazzi G, Costa CDS, Hebling J. Bond strength of water-free adhesive systems to cross-linked, air-dried dentin. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Anovazzi G, Medeiros MC, Pigossi SC, Finoti LS, Souza Moreira TM, Mayer MPA, Zanelli CF, Valentini SR, Rossa-Junior C, Scarel-Caminaga RM. Functionality and opposite roles of two interleukin 4 haplotypes in immune cells. Genes Immun 2017; 18:33-41. [PMID: 28053321 PMCID: PMC5303765 DOI: 10.1038/gene.2016.47] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 10/20/2016] [Accepted: 11/08/2016] [Indexed: 01/04/2023]
Abstract
Cytokines expression can be influenced by polymorphisms in their respective coding genes. We associated the CTI/TTD haplotype (Hap-1) and TCI/CCI haplotype (Hap-2) in the IL4 gene formed by the −590, +33 and variable number of tandem repeat polymorphisms with the severity of chronic periodontitis in humans. The functionality of these IL4 haplotypes in the response of immune cells to phorbol 12-myristate 13-acetate (PMA) with Ionomycin and IL-1β (as inflammatory stimuli) was evaluated. Gene expression (quantitative real-time PCR), profile of secreted cytokines (multiplex) and phenotypic polarization of T cells (flow cytometry) were the outcomes assessed. Green fluorescent protein reporter plasmid constructs containing specific IL4 haplotype were transiently transfected into JM cells to assess the influence of the individual haplotypes on promoter activity. In response to inflammatory stimuli the immune cells from Hap-1 haplotype had increased expression of anti-inflammatory IL4; conversely, the Hap-2 haplotype showed higher levels of pro-inflammatory cytokines. The haplotype CTI proved to be the most important for the regulation of IL4 promoter, regardless of the nature of the inflammatory stimulation; whereas the polymorphism in the promoter region had the least functional effect. In conclusion, IL4 haplotypes studied are functional and trigger opposite immune responses: anti-inflammatory (Hap-1) and pro-inflammatory (Hap-2). In addition, we identified the CTI haplotype as the main responsible for the regulation of IL4 transcriptional activity.
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Affiliation(s)
- G Anovazzi
- Department of Oral Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP-Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - M C Medeiros
- Department of Oral Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP-Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - S C Pigossi
- Department of Oral Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP-Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - L S Finoti
- Department of Oral Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP-Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - T M Souza Moreira
- Department of Biological Sciences, School of Pharmaceutical Sciences, Univ Estadual Paulista - UNESP, Araraquara, São Paulo, Brazil
| | - M P A Mayer
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - C F Zanelli
- Department of Biological Sciences, School of Pharmaceutical Sciences, Univ Estadual Paulista - UNESP, Araraquara, São Paulo, Brazil
| | - S R Valentini
- Department of Biological Sciences, School of Pharmaceutical Sciences, Univ Estadual Paulista - UNESP, Araraquara, São Paulo, Brazil
| | - C Rossa-Junior
- Department of Oral Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP-Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - R M Scarel-Caminaga
- Department of Morphology, School of Dentistry at Araraquara, UNESP-Univ Estadual Paulista, São Paulo, Brazil
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Corbi SCT, Finoti LS, Anovazzi G, Tanaka MH, Kim YJ, Secolin R, Marcaccini AM, Gerlach RF, Orrico SRP, Cirelli JA, Scarel-Caminaga RM. Clinical outcomes of periodontal therapy are not influenced by the ATC/TTC haplotype in the IL8 gene. J Periodontal Res 2013; 49:489-98. [PMID: 24033189 DOI: 10.1111/jre.12128] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE Although chronic periodontitis (CP) is a multifactorial condition, few studies have investigated the potential association of gene variants with the outcome of periodontal therapy. In a previous study, we reported that variants in the interleukin-8 (IL8) gene were associated with CP in a Brazilian population. The aim of this nonrandomized study was to investigate whether genetic susceptibility to CP, conferred by the presence of the IL8 ATC/TTC haplotype, influences the clinical outcomes of nonsurgical periodontal therapy and the IL-8 protein levels in the gingival crevicular fluid. MATERIAL AND METHODS Forty-one individuals were grouped according to the presence (susceptible to CP; n = 21) or absence (not susceptible to CP; n = 20) of the IL8 ATC/TTC haplotype. These individuals received nonsurgical periodontal therapy from one periodontist, who was blinded to the genetic status of each patient, and follow up continued for 45 d. The clinical parameters and gingival crevicular fluid samples were collected at baseline and on day 45. The IL-8 levels were determined by an ELISA. The data were subjected to the Mann-Whitney U-test, Wilcoxon and Spearman tests and to multiple logistic-regression analysis. RESULTS No significant differences between patients with or without the IL8 ATC/TTC haplotype were found for the outcome of nonsurgical periodontal therapy and IL-8 levels. The multiple logistic-regression analysis did not show a statistically significant association between the IL8 haplotype and the variables studied. CONCLUSION In this longitudinal clinical study, we observed that neither the outcome of nonsurgical periodontal therapy nor the IL-8 levels were influenced by the IL8 ATC/TTC CP-susceptibility haplotype. Additional studies of CP patients from other ethnic populations are necessary to confirm these results.
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Affiliation(s)
- S C T Corbi
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP- Univ Estadual Paulista, Araraquara, SP, Brazil
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Finoti LS, Anovazzi G, Pigossi SC, Corbi SCT, Teixeira SRL, Braido GVV, Kim YJ, Orrico SRP, Cirelli JA, Mayer MPA, Scarel-Caminaga RM. Periodontopathogens levels and clinical response to periodontal therapy in individuals with the interleukin-4 haplotype associated with susceptibility to chronic periodontitis. Eur J Clin Microbiol Infect Dis 2013; 32:1501-9. [PMID: 23748736 DOI: 10.1007/s10096-013-1903-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 05/23/2013] [Indexed: 02/06/2023]
Abstract
Periodontitis is an inflammatory disease that results from an interaction between dental biofilm agents and the host immune-inflammatory response. Periodontopathogenic organisms, such as Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola, as well as the host's susceptibility, represented by the host's genetic makeup, are the key factors that influence this complex disease. Recently, we identified haplotypes in the IL4 gene that were associated with chronic periodontitis (CP). This study aimed to evaluate whether subjects with different IL4 haplotypes (TCI/CCI and TTD/CTI) would be differentially colonized by periodontopathogens and whether they would respond differently to non-surgical periodontal therapy. Thirty-nine patients carrying the IL4 haplotype of genetic susceptibility to CP (IL4+) or protection against CP (IL4-) were evaluated. Those groups were further subdivided into individuals with CP (CP IL4+ or CP IL4-) and those that were periodontally healthy (H) (H IL4+ or H IL4-). CP patients were submitted to non-surgical periodontal therapy. Clinical and microbiological analyses were performed considering the data at baseline and 45 and 90 days after periodontal therapy. Periodontopathogens levels were evaluated by absolute quantitative polymerase chain reaction (qPCR). The baseline data revealed that the total levels of periodontopathogens were higher in the CP IL4+ than in the CP IL4- groups. Clinical analyses revealed that the periodontal therapy was equally effective, independent of the subject's IL4 genetic load. The TCI/CCI IL4 haplotype, previously associated with genetic susceptibility to CP, was also associated with increased levels of periodontopathogenic bacteria, but this genetic background did not influence the response to non-surgical periodontal treatment.
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Affiliation(s)
- L S Finoti
- Department of Oral Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP-Universidade Estadual Paulista, Araraquara, SP, Brazil
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Finoti LS, Corbi SCT, Anovazzi G, Teixeira SRL, Steffens JP, Secolin R, Kim YJ, Orrico SRP, Cirelli JA, Mayer MPA, Scarel-Caminaga RM. Association between IL8 haplotypes and pathogen levels in chronic periodontitis. Eur J Clin Microbiol Infect Dis 2013; 32:1333-40. [PMID: 23660697 DOI: 10.1007/s10096-013-1884-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 04/09/2013] [Indexed: 12/15/2022]
Abstract
Chronic periodontitis (CP) is considered to be a multifactorial disease influenced by microbial and genetic factors. The aim of the present study was to investigate whether the genetic susceptibility to CP in individuals with the IL8 ATC/TTC haplotype is associated with subgingival levels of periodontopathogens. Sixty-five individuals, grouped according to the presence (n = 28) or absence (n = 37) of the IL8 haplotype, were evaluated. After clinical periodontal evaluation, each group was subdivided according to the presence (CP) or absence (H) of periodontitis. Four subgingival samples were obtained from CP and two samples per subject from H patients. The levels and proportions of Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola were analyzed using quantitative real-time polymerase chain reaction (q-PCR). No differences were found in the proportion of periodontopathogenic bacteria between groups with the presence or absence of the IL8 haplotype. However, in the CP groups, the levels of periodontopathogens were significantly higher in the individuals without the IL8 haplotype than in the individuals with the IL8 haplotype. These results suggest that periodontal destruction may occur in patients who are considered to be genetically susceptible to CP with a lower microbial challenge because of the presence of the IL8 ATC/TTC haplotype than in patients without this haplotype.
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Affiliation(s)
- L S Finoti
- Department of Oral Diagnosis and Surgery, School of Dentistry at Araraquara, UNESP, Universidade Estadual Paulista, Araraquara, SP, Brazil
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