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Leelapornpisid W, Wanwatanakul P, Mahatnirunkul T. Efficacy of calcium hydroxide-loaded poly(lactic-co-glycolic acid) biodegradable nanoparticles as an intracanal medicament against endodontopathogenic microorganisms in a multi-species biofilm model. AUST ENDOD J 2024; 50:89-96. [PMID: 37947038 DOI: 10.1111/aej.12812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 09/29/2023] [Accepted: 10/29/2023] [Indexed: 11/12/2023]
Abstract
This study aimed to evaluate the antimicrobial activity of calcium hydroxide-loaded poly(lactic-co-glycolic acid) nanoparticles (CH-loaded PLGA NPs) on multi-species biofilms. Human root blocks were prepared (n = 40), and multi-species suspensions of Candida albicans, Enterococcus faecalis and Streptococcus gordonii were incubated within the root canals for 21 days. Canals (n = 10/group) were then medicated with saline solution (negative control), chlorhexidine (positive control), calcium hydroxide and CH-loaded PLGA NPs for 7 days. Samples taken from the 0.1 mm root canal dentin were collected, and cell growth was detected by culture on BHI agar. The viable cell count of the Ca(OH)2, chlorhexidine gel and CH-loaded PLGA NPs group was significantly lower than the normal saline group (p < 0.001). CH-loaded PLGA NPs demonstrated a significant lower viable cell than Ca(OH)2 (p < 0.001); it has potential as a medicament for endodontic therapy.
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Affiliation(s)
- Warat Leelapornpisid
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | | | - Thanisorn Mahatnirunkul
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
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Thomas PT, Issac JS, Girija P, Chandran LS, Arjun DS, Siddik AJ. An in vitro comparison of calcium ions release and diffusion ability of calcium hydroxide-based intracanal medicament in combination with three different vehicles like propolis, chitosan, and propylene glycol. JOURNAL OF CONSERVATIVE DENTISTRY AND ENDODONTICS 2024; 27:190-194. [PMID: 38463473 PMCID: PMC10923230 DOI: 10.4103/jcde.jcde_258_23] [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: 11/02/2023] [Revised: 11/29/2023] [Accepted: 12/05/2023] [Indexed: 03/12/2024]
Abstract
Context Calcium hydroxide, which is an intracanal medicament, is widely used in endodontics. Improvements can be made to its effectiveness, as calcium hydroxide is dependent on the vehicle. Aim The study aims to compare and evaluate the release and diffusion ability of calcium hydroxide when mixed with - propolis, chitosan, and propylene glycol. Methods For this study, 33 single-rooted extracted premolar teeth have been decoronated. After the working length and enlargement of the canals had been established, different preparations of calcium hydroxide with vehicles such as propolis, chitosan, and propylene glycol were loaded into the canals. Atomic absorption spectrophotometry was used to analyze the release of calcium ions in three groups, while a digital pH meter was used to determine an acid change. Results Atomic absorption spectrophotometry showed sustained releases of calcium ions and the digital pH meter showed increased diffusion capacity in the propylene glycol paste group in comparison to the other two groups. Conclusion Propylene glycol vehicle made it easier to enter calcium hydroxide into the dentinal tubules.
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Affiliation(s)
- Pinku T Thomas
- Department of Pediatric and Preventive Dentistry, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
| | - Jyoti Sumi Issac
- Department of Pediatric and Preventive Dentistry, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
| | - Parvathy Girija
- Department of Pediatric and Preventive Dentistry, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
| | - Lekshmi S Chandran
- Department of Pediatric and Preventive Dentistry, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
| | - D S Arjun
- Department of Pediatric and Preventive Dentistry, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
| | - A J Siddik
- Department of Pediatric and Preventive Dentistry, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
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Koutroulis A, Valen H, Ørstavik D, Kapralos V, Camilleri J, Sunde PT. Antibacterial Activity of Root Repair Cements in Contact with Dentin-An Ex Vivo Study. J Funct Biomater 2023; 14:511. [PMID: 37888176 PMCID: PMC10607193 DOI: 10.3390/jfb14100511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/18/2023] [Accepted: 10/08/2023] [Indexed: 10/28/2023] Open
Abstract
This study assessed the antibacterial characteristics of the dentin/material interface and dentin surfaces exposed to experimental hydraulic calcium silicate cement (HCSC) with or without bioactive glass (BG) replacement (20% or 40%) or mixed with a silver nanoparticle (SNP) solution (1 or 2 mg/mL), and Biodentine, TotalFill BC RRM putty and Intermediate Restorative Material (IRM). Human root dentin segments with test materials were assessed at 1 or 28 days. In one series, the specimens were split to expose the dentin and material surfaces. A 24 h direct contact test was conducted against three-day established Enterococcus faecalis and Pseudomonas aeruginosa monospecies biofilms. In another series, the dentin/material interface of intact specimens was exposed to biofilm membranes for 3 days and the antibacterial activity was assessed via confocal microscopy. The interface was additionally characterised. All one-day material and dentin surfaces were antibacterial. Dentin surfaces exposed to HCSC with 40% BG-replacement, Biodentine and IRM had decreased antibacterial properties compared to those of the other cements. The HCSC mixed with a 2 mg/mL SNP solution had the highest antimicrobial effect in the confocal assay. The interfacial characteristics of HCSCs were similar. The test materials conferred antibacterial activity onto the adjacent dentin. The BG reduced the antibacterial effect of dentin exposed to HCSC; a 2 mg/mL SNP solution increased the antibacterial potential for longer interaction periods (three-day exposure).
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Affiliation(s)
- Andreas Koutroulis
- Section of Endodontics, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, 0317 Oslo, Norway; (D.Ø.); (V.K.)
| | - Håkon Valen
- Nordic Institute of Dental Materials (NIOM), 0855 Oslo, Norway;
| | - Dag Ørstavik
- Section of Endodontics, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, 0317 Oslo, Norway; (D.Ø.); (V.K.)
| | - Vasileios Kapralos
- Section of Endodontics, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, 0317 Oslo, Norway; (D.Ø.); (V.K.)
| | - Josette Camilleri
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK;
| | - Pia Titterud Sunde
- Section of Endodontics, Institute of Clinical Dentistry, Faculty of Dentistry, University of Oslo, 0317 Oslo, Norway; (D.Ø.); (V.K.)
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Plataniotis E, Abbott P. A comparison of hydroxyl ion diffusion through root dentine from various calcium hydroxide preparations. AUST ENDOD J 2023; 49 Suppl 1:280-287. [PMID: 29808602 DOI: 10.1111/aej.12281] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2018] [Indexed: 11/30/2022]
Abstract
Different calcium hydroxide [Ca(OH)2 ] formulations are available. The aim was to assess differences in hydroxyl ion release with different formulations. Sixty-six teeth were divided one control (n = 6) and four experimental (n = 15) groups: (i) Pulpdent Paste; (ii): DT Temporary Dressing; (iii): Ca(OH)2 powder/saline; (iv): Ca(OH)2 points; (v): no medicament. pH was measured in inner dentine and outer dentine cavities over 12 weeks. Inner dentine pH rose rapidly for all groups except the points and controls. Peak pH was reached by day 2 before dropping and stabilising (8.0-9.2). Outer dentine pH rose steadily until day 21 for aqueous solutions and then stabilised (8.0-8.5). The points had minimal pH increase for the entire period. There were no significant differences in hydroxyl ion release between the aqueous solutions. Type of paste base did not affect release and diffusion of hydroxyl ions which continued for 84 days.
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Affiliation(s)
| | - Paul Abbott
- UWA Dental School, The University of Western Australia, Nedlands, Western Australia, Australia
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Tadano JPG, Bueno CEDS, Silveira CFDM, Yamanaka TB, Piai GG, Duarte MAH, Vivan RR, De Martin AS. Effect of different activation methods on the intratubular penetration of CaOH 2 paste: Ex-vivo analysis by confocal laser scanning microscopy. AUST ENDOD J 2023; 49 Suppl 1:18-26. [PMID: 36093994 DOI: 10.1111/aej.12685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/28/2022] [Accepted: 09/01/2022] [Indexed: 11/30/2022]
Abstract
The aim of this study was to evaluate the maximum penetration depth (MPD) and penetration area (PA) of CaOH2 paste agitated by different methods and to measure the pH after performing these methods. Fifty-five mandibular premolars were divided into control, GL and 4 experimental groups, GEC, GXP, GEDDY and GI (n = 11), where the paste was agitated with Easy Clean, XP-endo Finisher, EDDY and Irrisonic, respectively. The canals were instrumented and irrigated with NaOCl. The paste was manipulated with propylene glycol and rhodamine B dye. Root sections were examined using confocal laser scanning microscopy. There was no difference between groups regarding PA (p > 0.05). At 5 mm, MPD was greater in GEC than in GL or GEDDY, and greater in GI than in GL (p < 0.05). At 2 mm, MPD was greater in GEC than in the other groups (p < 0.05). In conclusion, both Easy Clean and Irrisonic promoted deeper paste penetration and were associated with higher pH levels.
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Affiliation(s)
- João Pedro Gasparin Tadano
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Endodontia, Campinas, São Paulo, Brazil
| | | | | | - Tainara Bielecki Yamanaka
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Endodontia, Campinas, São Paulo, Brazil
| | - Gabriela Gonçalez Piai
- Department of Restorative Dentistry, Endodontics and Dental Materials, School of Dentistry of Bauru, University of São Paulo, Bauru, São Paulo, Brazil
| | - Marco Antônio Húngaro Duarte
- Department of Restorative Dentistry, Endodontics and Dental Materials, School of Dentistry of Bauru, University of São Paulo, Bauru, São Paulo, Brazil
| | - Rodrigo Ricci Vivan
- Department of Restorative Dentistry, Endodontics and Dental Materials, School of Dentistry of Bauru, University of São Paulo, Bauru, São Paulo, Brazil
| | - Alexandre Sigrist De Martin
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Endodontia, Campinas, São Paulo, Brazil
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Kahler B. Present status and future directions - Managing discoloured teeth. Int Endod J 2022; 55 Suppl 4:922-950. [PMID: 35188275 PMCID: PMC9790475 DOI: 10.1111/iej.13711] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 02/14/2022] [Accepted: 02/16/2022] [Indexed: 12/30/2022]
Abstract
Managing tooth discolouration involves a range of different protocols for clinicians and patients in order to achieve an aesthetic result. There is an increasing public awareness in the appearance of their teeth and management of tooth discolouration may be inter-disciplinary and involve both vital and nonvital teeth. Vital teeth can be easily treated with low concentration hydrogen peroxide products safely and effectively using an external approach and trays. For endodontically treated teeth, the walking bleach technique with hydrogen releasing peroxide products is popular. However, there is an association with external cervical root resorption with higher concentrations of hydrogen peroxide of 30%-35%. There are also regulatory considerations for the use of hydrogen peroxide in certain jurisdictions internationally. Prosthodontic treatments are more invasive and involve loss of tooth structure as well as a life cycle of further treatment in the future. This narrative review is based on searches on PubMed and the Cochrane library. Bleaching endodontically treated teeth can be considered a safe and effective protocol in the management of discoloured teeth. However, the association between bleaching and resorption remains unclear although there is likely to be a relation to prior trauma. It is prudent to avoid thermocatalytic approaches and to use a base/sealer to cover the root filling. An awareness expectations of patients and multidisciplinary treatment considerations is important in achieving the aesthetic result for the patient. It is likely that there will be an increasing demand for aesthetic whitening treatments. Bleaching of teeth has also become increasingly regulated although there are international differences in the use and concentration of bleaching agents.
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Affiliation(s)
- Bill Kahler
- School of DentistryThe University of QueenslandBrisbaneQueenslandAustralia,The University of Queensland Oral Health CentreHerstonQueenslandAustralia
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Kumari V, Sanju D, Thomas T, Thomas J, Sujeer R. Comparative evaluation of cerium oxide nanoparticles and calcium hydroxide as intracanal medicament against Enterococcus faecalis on tooth substrate: An in vitro study. ENDODONTOLOGY 2022. [DOI: 10.4103/endo.endo_25_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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de Andrade FB, da Silva Munhoz Vasconcelos LR, Pereira TC, Garcia RB, Bramante CM, Duarte MAH. Ultrasonic agitation reduces the time of calcium hydroxide antimicrobial effect and enhances its penetrability. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:150. [PMID: 34874480 PMCID: PMC8651585 DOI: 10.1007/s10856-021-06607-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 09/19/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVES The objective of the present work was to evaluate the ultrasonic agitation, time and vehicle (propylene glycol or distilled water) on the antimicrobial potential and penetrability of calcium hydroxide pastes on infected dentin by means of Confocal Laser Scanning Microscopy (CLSM) and microbiological culture (MC). MATERIALS AND METHODS Dentin specimens were infected with Enterococcus faecalis using a new contamination protocol of 5 days. The specimens were divided into eight groups and dressed with the pastes for 7 or 15 days: G1) calcium hydroxide (CH) + propylene glycol (prop)/7 days (d), G2) CH + prop/7d + ultrasonic agitation (U), G3) CH + distilled water (dw)/7d, G4) CH + dw/7d + U, G5) CH + prop/15d, G6) CH + prop/15d + U, G7) CH + dw/15d, G8) CH + dw/15d + U. The ultrasonic activation was made for 1 min in both directions with a plain point insert. After medications removal, the images obtained by CLSM showed the viable (green) and dead (red) bacteria with Live and Dead dye. By the MC, the dentinal wall debris obtained by burs were collected for colony counts. For the penetration test, the Rodamine B dye was added to the CH pastes and analyzed by CLSM. RESULTS The 7 and 15-days CH + prop+U pastes performed better antimicrobial efficacy, followed by the CH + dw+U/15d paste. CONCLUSIONS All pastes demonstrated better penetration and antimicrobial activity against E. faecalis when agitated with ultrasound, even in periods of up to seven days. The propylene glycol vehicle showed better results. CLINICAL RELEVANCE Agitation of the dressing that remains for less time inside the root canal can optimize the decontamination of endodontic treatment.
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Affiliation(s)
- Flaviana Bombarda de Andrade
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
| | | | - Thais Cristina Pereira
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Roberto Brandão Garcia
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Clóvis Monteiro Bramante
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Marco Antônio Hungaro Duarte
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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Activity of Two Antimicrobial Peptides against Enterococcus faecalis in a Model of Biofilm-Mediated Endodontic Infection. Antibiotics (Basel) 2021; 10:antibiotics10101220. [PMID: 34680801 PMCID: PMC8532894 DOI: 10.3390/antibiotics10101220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/28/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022] Open
Abstract
Enterococcus faecalis is a common cause of biofilm-associated opportunistic infections, which are often difficult to treat. The formation of E. faecalis biofilms on the dentinal walls of the root canal is frequently the cause of endodontic treatment failure and secondary apical periodontitis. In a preliminary work, two recognized antifungal peptides, KP and L18R, showed antibacterial activity against planktonic E. faecalis cells at micromolar concentrations. Moreover, L18R proved to reduce the biomass in the early stage of E. faecalis biofilm development on polystyrene plates, while a qualitative biofilm inhibition was demonstrated on hydroxyapatite disks by confocal laser scanning microscopy (CLSM). The aim of this study was to better characterize the effect of both peptides on E. faecalis biofilm. A reduction in metabolic activity after peptide treatment was detected by Alamar Blue assay, while a remarkable impairment in the architecture of E. faecalis biofilms on hydroxyapatite disks, along with a significant reduction in viable bacteria, was caused mostly by L18R, as assessed by CLSM and scanning electron microscopy. The lack of cytotoxicity of the investigated peptides against L929 murine fibroblasts was also determined. Obtained results suggest L18R as a promising candidate for the development of new strategies for endodontic infection control.
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Elmsmari F, González Sánchez JA, Duran-Sindreu F, Belkadi R, Espina M, García ML, Sánchez-López E. Calcium hydroxide-loaded PLGA biodegradable nanoparticles as an intracanal medicament. Int Endod J 2021; 54:2086-2098. [PMID: 34355406 DOI: 10.1111/iej.13603] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 08/01/2021] [Accepted: 08/03/2021] [Indexed: 12/19/2022]
Abstract
AIM To develop a formulation in which calcium hydroxide (Ca(OH)₂) was successfully loaded into poly(lactic-co-glycolic acid) (PLGA) biodegradable nanoparticles (NPs) to be used in the field of endodontics as an intracanal medicament, including NP optimization and characterization, plus drug release profile of the NPs compared with free Ca(OH)₂. Additionally, the depth and area of penetration of the NPs inside the dentinal tubules of extracted teeth were compared with those of the free Ca(OH)₂. METHODOLOGY Ca(OH)₂ NPs were prepared using the solvent displacement method. NPs was optimized with a central composite design to obtain a final optimized formulation. The morphology of the NPs was examined under transmission electron microscopy (TEM), and characterization was carried out using X-ray diffraction (XRD), Fourier transform infrared (FTIR) and differential scanning calorimetry (DSC). The drug release profile of the Ca(OH)₂ NPs and free Ca(OH)₂ was evaluated up to 48 h. Finally, the depth and area of penetration inside the dentinal tubules of extracted teeth were examined for both the Ca(OH)₂ NPs and free Ca(OH)₂ using the Mann-Whitney U test to determine any significant differences. RESULTS Utilizing the optimized formulation, the Ca(OH)₂ NPs had an average size below 200 nm and polydispersity index lower than 0.2, along with a highly negative zeta potential and suitable entrapment efficiency percentage. The spherical morphology of the Ca(OH)₂ NPs was confirmed using TEM. The results of the XRD, FTIR and DSC revealed no interactions and confirmed that the drug was encapsulated inside the NPs. The drug release profile of the Ca(OH)₂ NPs exhibited a prolonged steady release that remained stable up to 48 h with higher concentrations than the free Ca(OH)₂. After examination by confocal laser scanning microscopy, Ca(OH)₂ NPs had a significantly greater depth and area of penetration inside dentinal tubules compared with the free drug. CONCLUSIONS Ca(OH)₂-loaded PLGA NPs were successfully optimized and characterized. The NPs exhibited a prolonged drug release profile and superior penetration inside dentinal tubules of extracted teeth when compared to Ca(OH)2 .
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Affiliation(s)
- Firas Elmsmari
- Department of Endodontics, Faculty of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain.,Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates
| | | | - Fernando Duran-Sindreu
- Department of Endodontics, Faculty of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Roumaissa Belkadi
- Department of Endodontics, Faculty of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Marta Espina
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain
| | - Maria Luisa García
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain.,Networking Research Centre of Neurodegenerative Disease (CIBERNED), Instituto de Salud Juan Carlos III, Madrid, Spain
| | - Elena Sánchez-López
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), University of Barcelona, Barcelona, Spain.,Networking Research Centre of Neurodegenerative Disease (CIBERNED), Instituto de Salud Juan Carlos III, Madrid, Spain
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Anija R, Kalita C, Bhuyan AC, Hussain MDI, Saikia A, Das L. Comparative evaluation of the concentration-dependent effect of proton-pump inhibitor in association with calcium hydroxide and chlorhexidine on Enterococcus faecalis: An in vitro study. J Oral Maxillofac Pathol 2021; 25:198. [PMID: 34349438 PMCID: PMC8272501 DOI: 10.4103/jomfp.jomfp_303_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 12/23/2020] [Accepted: 01/19/2021] [Indexed: 11/04/2022] Open
Abstract
Background Enterococcus faecalis is the most persistent organism in the root canal which resists most of the intracanal medicaments. There is always a constant attempt to eliminate this endodontic pathogen from the root canal system. Aim The aim of this study was to evaluate the efficacy of the association of different concentrations of proton-pump inhibitor (PPI) (Lansoprazole) with calcium hydroxide (CH) and chlorhexidine (CHX) against E. faecalis using a broth dilution method. Materials and Methods E. faecalis was inoculated into brain-heart infusion broth at 37°C for 5 h. The master broth was then treated with CH (Group 1); CH + 2% CHX (Group 2); CH + PPI 6.25 μg/ml (Group 3A); CH + PPI 25 μg/ml (Group 3B); 2% CHX + PPI 6.25 μg/ml (Group 4A); 2% CHX + PPI 25 μg/ml (Group 4B); CH + 2% CHX + PPI 6.25 μg/ml (Group 5A), and CH + 2% CHX + PPI 25 μg/ml (Group 5B). The groups were spectrophotometrically analyzed at 630 nm at 24 h to determine the group with the least optical density. Statistical Analysis Comparison between the groups was done by the one-way analysis of variance and Kruskal-Wallis test for multiple comparisons. Results The mean percentage inhibition of E. faecalis by Group 5A (CH + 2% CHX + PPI 6.25 μg/ml) was the highest compared to other groups. The lowest mean value was observed in Group 3A (CH + PPI 6.25 μg/ml) indicating least efficiency. Conclusion There was a concentration-dependent effect of PPI on CH and CHX against E. faecalis. The maximum efficacy was found when the lower concentration of PPI was associated with CH/CHX mixture.
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Affiliation(s)
- R Anija
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Chandana Kalita
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - A C Bhuyan
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - M D Iftikar Hussain
- Department of Animal Biotechnology, College of Veterinary Science, Guwahati, Assam, India
| | - Anindita Saikia
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Lima Das
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
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George R, Wong M, Jarrett J, White A, Walsh L. Evaluation of the diffusion of calcium hydroxide-based medicaments through the dentinal tubules and apical foramen: A mass spectrometry study. J Conserv Dent 2021; 24:611-615. [PMID: 35558669 PMCID: PMC9089778 DOI: 10.4103/jcd.jcd_432_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 12/02/2021] [Accepted: 01/19/2022] [Indexed: 11/26/2022] Open
Abstract
Aims: This mass spectrometry study investigated the diffusion of hydroxyl and calcium ions from a calcium hydroxide intracanal medicament (Pulpdent®) when used alone or mixed in equal parts with a steroid–antibiotic paste (Ledermix®). Materials and Methods: The pH (using pH meter) and calcium ion concentration (using inductively coupled plasma-mass spectrometry) of the diffused medicaments were assessed using endodontically prepared human extracted teeth with either a sealed or a patent apex, at time intervals of 1, 3, 8, 24, and 168 h. Statistical Analysis: A one-way ANOVA was used to explore differences between and within groups, with Tukey–Kramer/Games–Howell posttests. Results: In both situations tested, Pulpdent® showed greater release of both calcium and hydroxyl ions than when mixed in equal parts with Ledermix®. Greater initial release of both ions occurred in roots with a patent apex, but by 1 week there was no significant difference between the two. If a 50:50 combination of Pulpdent® paste and Ledermix® paste is used, there is a lower release of calcium ions and hydroxyl ions than using Pulpdent® paste alone. Conclusion: With both Pulpdent® paste alone and Pulpdent® paste mixed equally with Ledermix® paste, the major pathway for movement of hydroxyl ions and calcium ions is diffusion through the dentine of the root, with the apex playing only a minor role.
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Wright PP, Cooper C, Kahler B, Walsh LJ. Multiple assessment methodologies in determining the antibiofilm actions of sodium hypochlorite mixed with clodronate or etidronate in endodontic irrigation. J Microbiol Methods 2020; 180:106107. [PMID: 33227309 DOI: 10.1016/j.mimet.2020.106107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 10/28/2020] [Accepted: 11/17/2020] [Indexed: 12/12/2022]
Abstract
This study aimed to use multiple methodologies, including a novel usage of scanning electron microscopy (SEM), to evaluate the antimicrobial actions of sodium hypochlorite (NaOCl) admixed with clodronate or etidronate in root canal irrigation. The study also examined the usefulness of colony counting as a biofilm assessment methodology. Seven day Enterococcus faecalis biofilms were grown on hydroxyapatite discs. The discs were disinfected with 0.26 M clodronate-5% NaOCl, 0.26 M etidronate-5% NaOCl, 5% NaOCl, or treated with phosphate buffered saline (PBS). Assessments were performed using colony counting, SEM and the XTT reduction assay. The XTT assessment used the same groups but with 2.5% NaOCl. For colony counting, bacteria were removed from the discs by vortex mixing, followed by plating. The discs were subsequently fixed for SEM imagining and evaluators scored the SEM micrographs for remaining bacteria. Antibiofilm actions were assessed with the Kruskal-Wallis and Dunn's multiple comparison tests. SEM micrographs and the XTT assay revealed no differences between the NaOCl controls and the clodronate or etidronate mixtures with NaOCl (P > 0.05). It was concluded that the chelator mixtures with NaOCl had antibiofilm actions comparable to NaOCl. Furthermore, vortex mixing incompletely removed biofilm from HA discs in the PBS controls and hence colony counting using E. faecalis biofilms on hydroxyapatite discs could not be used for intergroup comparisons involving PBS. Additionally, colony counting could not be used for comparisons between the NaOCl treatment groups because the removal of bacteria from the substrate by vortex mixing was affected by the irrigant type.
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Affiliation(s)
- Patricia P Wright
- University of Queensland, School of Dentistry, 288 Herston Rd, Herston, QLD, 4006, Australia.
| | - Crystal Cooper
- Central Analytical Research Facility (CARF), Institute for Future Environments, Queensland University of Technology, 2 George Street, Brisbane, 4000, Australia
| | - Bill Kahler
- University of Queensland, School of Dentistry, 288 Herston Rd, Herston, QLD, 4006, Australia
| | - Laurence J Walsh
- University of Queensland, School of Dentistry, 288 Herston Rd, Herston, QLD, 4006, Australia
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Jeng PY, Lin LD, Chang SH, Lee YL, Wang CY, Jeng JH, Tsai YL. Invasive Cervical Resorption—Distribution, Potential Predisposing Factors, and Clinical Characteristics. J Endod 2020; 46:475-482. [DOI: 10.1016/j.joen.2020.01.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 12/22/2022]
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Wright PP, Kahler B, Walsh LJ. The effect of temperature on the stability of sodium hypochlorite in a continuous chelation mixture containing the chelator clodronate. AUST ENDOD J 2020; 46:244-248. [DOI: 10.1111/aej.12399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Patricia P. Wright
- School of Dentistry University of Queensland Herston Queensland Australia
| | - Bill Kahler
- School of Dentistry University of Queensland Herston Queensland Australia
| | - Laurence J. Walsh
- School of Dentistry University of Queensland Herston Queensland Australia
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Lima TFR, Ascendino JF, Cavalcante IDO, D Assunção FLC, Salazar-Silva JR, Silva EJNLD, Lemos SG, Soares ADJ. Influence of chlorhexidine and zinc oxide in calcium hydroxide pastes on pH changes in external root surface. Braz Oral Res 2019; 33:e005. [PMID: 30758405 DOI: 10.1590/1807-3107bor-2019.vol33.0005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 11/08/2018] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was to assess the influence of chlorhexidine (liquid and gel) and zinc oxide in calcium hydroxide (CH) pastes on root pH in simulated external resorption. One hundred human anterior teeth with a single root canal were selected. After decoronation and root canal instrumentation, the specimens were divided into 4 experimental groups and 1 control group (without intracanal paste): CH + saline (CH+S), CH + 2% chlorhexidine liquid (CH+ CHX), CH + 2% chlorhexidine gel (CH+ CHXg), and CH + 2% chlorhexidine gel + zinc oxide (CH+ CHXg+ZnO). pH was measured using a microelectrode at 3 and 24 h, and 1, 2, 3, and 4 weeks after inserting intracanal pastes. Data were analyzed statistically using an ANOVA and Tukey's test (p < 0.05). The CH+CHXg+ZnO group had the highest pH values throughout (p<0.05). The CH+S and CH+ CHX groups had the highest pH values after 1 week and the CH+ CHXg group after 2 weeks. CH+ CHXg maintained the highest pH until the fourth week compared with CH+ CHX (p < 0.05). The control group remained at a neutral pH at all evaluated times. It can be concluded that chlorhexidine solution or gel maintained the alkaline pH of CH, and chlorhexidine gel allowed a slower decrease in pH over time. CH+ CHXg+ZnO showed the highest pH values and was an effective intracanal medication for maintaining alkaline root pH in the area of resorption.
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Affiliation(s)
- Thiago Farias Rocha Lima
- Universidade Federal da Paraiba - UFPB, Endodontics Area, Department of Restorative Dentistry, João Pessoa, PB, Brazil
| | | | | | - Fabio Luiz Cunha D Assunção
- Universidade Federal da Paraiba - UFPB, Endodontics Area, Department of Restorative Dentistry, João Pessoa, PB, Brazil
| | - Juan Ramon Salazar-Silva
- Universidade Federal da Paraiba - UFPB, Endodontics Area, Department of Restorative Dentistry, João Pessoa, PB, Brazil
| | | | | | - Adriana de Jesus Soares
- Universidade Estadual de Campinas - Unicamp, School of Dentistry of Piracicaba, Department of Restorative Dentistry, Piracicaba, SP, Brazil
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Tong Z, Zhang Y, Wei X. The effect of human serum and dentin powder alone or in combination on the antibacterial activity of sodium hypochlorite against Enterococcus faecalis. Arch Oral Biol 2019; 97:72-76. [DOI: 10.1016/j.archoralbio.2018.10.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 09/21/2018] [Accepted: 10/07/2018] [Indexed: 10/28/2022]
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Marchesan MA, James CM, Lloyd A, Morrow BR, García-Godoy F. Effect of access design on intracoronal bleaching of endodontically treated teeth: Anex vivostudy. J ESTHET RESTOR DENT 2017; 30:E61-E67. [DOI: 10.1111/jerd.12335] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Melissa Andreia Marchesan
- Department of Endodontics; College of Dentistry, University of Tennessee Health Science Center College of Dentistry; Memphis Tennessee
| | - Christopher Michael James
- Department of Endodontics; College of Dentistry, University of Tennessee Health Science Center College of Dentistry; Memphis Tennessee
| | - Adam Lloyd
- Department of Endodontics; College of Dentistry, University of Tennessee Health Science Center College of Dentistry; Memphis Tennessee
| | - Brian Ray Morrow
- Department of Bioscience Research; College of Dentistry, University of Tennessee Health Science Center College of Dentistry; Memphis Tennessee
| | - Franklin García-Godoy
- Department of Bioscience Research; College of Dentistry, University of Tennessee Health Science Center College of Dentistry; Memphis Tennessee
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Ćetenović B, Čolović B, Vasilijić S, Pašalić S, Jokanović V, Marković D. In vitro biocompatibility of nanostructured endodontic materials using SCAP cells. BALKAN JOURNAL OF DENTAL MEDICINE 2017. [DOI: 10.1515/bjdm-2017-0029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background/Aim: Lately, fully innovative sol-gel method with high-temperature self-propagating reaction was used for the synthesis of new nanostructured endodontic materials, in combination with different radiopacifiers: bismuth (ALBO-MPCA1) and barium (ALBO-MPCA2). The aim of this study was to investigate the biocompatibility of nanostructured endodontic materials based on highly active calcium silicates and mixed with different radiopacifiers in comparison to MTA+ using human stem cells from the apical papilla- SCAP cells. Material and Methods: Morphology of the samples was studied by SEM. The tested materials were mixed with distilled water in a ratio 2:1 (m/m). Fifteen minutes after the preparation, samples were used in the experiment. The biocompatibility of fresh materials, after 3h and 7 days, was tested using 3-(4,5-dimethylthiazol-2-yl)-2,5- diphenyltetrazolium bromide- MTT test. Results: Samples mostly consisted of spherical and rode-like. The relative viability of cells increased following the exposure time. Conclusion: The biocompatibility of synthesized materials is comparable to the control material MTA+, and therefore these materials can be recommended for further clinical studies.
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Lim SM, Ahn KB, Kim C, Kum JW, Perinpanayagam H, Gu Y, Yoo YJ, Chang SW, Han SH, Shon WJ, Lee W, Baek SH, Zhu Q, Kum KY. Antifungal effects of synthetic human β-defensin 3-C15 peptide. Restor Dent Endod 2016; 41:91-7. [PMID: 27200276 PMCID: PMC4868883 DOI: 10.5395/rde.2016.41.2.91] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 02/16/2016] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES The purpose of this ex vivo study was to compare the antifungal activity of a synthetic peptide consisting of 15 amino acids at the C-terminus of human β-defensin 3 (HBD3-C15) with calcium hydroxide (CH) and Nystatin (Nys) against Candida albicans (C. albicans) biofilm. MATERIALS AND METHODS C. albicans were grown on cover glass bottom dishes or human dentin disks for 48 hr, and then treated with HBD3-C15 (0, 12.5, 25, 50, 100, 150, 200, and 300 µg/mL), CH (100 µg/mL), and Nys (20 µg/mL) for 7 days at 37℃. On cover glass, live and dead cells in the biomass were measured by the FilmTracer Biofilm viability assay, and observed by confocal laser scanning microscopy (CLSM). On dentin, normal, diminished and ruptured cells were observed by field-emission scanning electron microscopy (FE-SEM). The results were subjected to a two-tailed t-test, a one way analysis variance and a post hoc test at a significance level of p = 0.05. RESULTS C. albicans survival on dentin was inhibited by HBD3-C15 in a dose-dependent manner. There were fewer aggregations of C. albicans in the groups of Nys and HBD3-C15 (≥ 100 µg/mL). CLSM showed C. albicans survival was reduced by HBD3-C15 in a dose dependent manner. Nys and HBD3-C15 (≥ 100 µg/mL) showed significant fungicidal activity compared to CH group (p < 0.05). CONCLUSIONS Synthetic HBD3-C15 peptide (≥ 100 µg/mL) and Nys exhibited significantly higher antifungal activity than CH against C. albicans by inhibiting cell survival and biofilm.
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Affiliation(s)
- Sang-Min Lim
- Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Korea
| | - Ki-Bum Ahn
- Department of Oral Microbiology and Immunology, DRI and BK21 Plus Program, Seoul National University School of Dentistry, Seoul, Korea
| | - Christine Kim
- Department of Anatomy and Cell Biology, McGill University, Montreal, QC, Canada
| | - Jong-Won Kum
- Department of Biology, Siena College, Loudonville, NY, USA
| | - Hiran Perinpanayagam
- Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
| | - Yu Gu
- Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Korea
| | - Yeon-Jee Yoo
- Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Korea
| | - Seok Woo Chang
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology, DRI and BK21 Plus Program, Seoul National University School of Dentistry, Seoul, Korea
| | - Won-Jun Shon
- Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Korea
| | - Woocheol Lee
- Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Korea
| | - Seung-Ho Baek
- Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Korea
| | - Qiang Zhu
- Division of Endodontology, Department of Oral Health and Diagnostic Sciences, University of Connecticut Health Center, School of Dental Medicine, Farmington, CT, USA
| | - Kee-Yeon Kum
- Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Korea
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de Almeida LHS, Leonardo NGES, Gomes APN, Giardino L, Souza EM, Pappen FG. Pulp tissue dissolution capacity of sodium hypochlorite combined with cetrimide and polypropylene glycol. Braz Dent J 2015; 24:477-81. [PMID: 24474288 DOI: 10.1590/0103-6440201302041] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 08/16/2013] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the influence of the addition of cetrimide and polypropylene glycol to sodium hypochlorite (NaOCl) on its capacity to dissolve pulp tissue. Bovine pulp fragments with standardized weight and volume were immersed for 5, 15 and 30 min in 2 mL of NaOCl and Hypoclean (NaOCl added with cetrimide and polypropylene glycol) solutions at 5.25%, 2.5%, 1%, 0.5% and 0.25% and afterwards re-weighted. Distilled water was used as a control. The percentage of tissue loss was considered for statistical analysis (univariate ANOVA, SPSS, v. 17.0) at 5% significance level. There was no tissue dissolution in the control group. NaOCl added with surfactants (Hypoclean) dissolved more pulp tissue (p<0.05) than NaOCl alone. Tissue dissolution was directly dependent on the concentration of solutions (p<0.05), and also on the time range (p<0.05). The combination of NaOCl at high and low concentrations with the surfactants cetrimide and polypropylene glycol increased significantly its capacity to dissolve pulp tissue.
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Affiliation(s)
| | | | - Ana Paula Neutzling Gomes
- Department of Semiology and Clinics, School of Dentistry, UNIPel - Federal University of Pelotas, PelotasRS, Brazil
| | - Luciano Giardino
- Department of Endodontics, School of Dentistry, University of Torino, Italy
| | | | - Fernanda Geraldo Pappen
- Department of Semiology and Clinics, School of Dentistry, UNIPel - Federal University of Pelotas, PelotasRS, Brazil
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Ulusoy AT, Kalyoncuoğlu E, Reis A, Cehreli ZC. Antibacterial effect of N-acetylcysteine and taurolidine on planktonic and biofilm forms of Enterococcus faecalis. Dent Traumatol 2015; 32:212-8. [PMID: 26515652 DOI: 10.1111/edt.12237] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/18/2015] [Indexed: 11/30/2022]
Abstract
AIM This study investigated the antimicrobial activity of taurolidine and N-acetylcysteine (NAC) on planktonic and biofilm Enterococcus faecalis phenotypes. MATERIALS AND METHODS The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of NAC and taurolidine were determined using broth microdilution, utilizing calcium hydroxide (CH), sodium hypochlorite, and chlorhexidine for comparisons. Thereafter, the ability of dentin powder to neutralize the antibacterial activity of NAC and taurolidine was studied. The efficacy of both antimicrobial agents on E. faecalis biofilms was examined quantitatively by exposure of 21-day-old E. faecalis biofilms on dentin disks. The cytotoxicity of human dental pulp fibroblast cells in contact with the extracts was evaluated by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium bromide (MTT) assay. RESULTS The MIC and MBC of NAC, taurolidine, and CH were not affected by pre-incubation in dentin powder. As verified by qualitative assay of E. faecalis biofilms, CH was the strongest bactericidal agent at all test dilutions, regardless of the presence of dentin powder. The antibacterial effect of NAC and taurolidine was significantly lower than that of CH at all test dilutions. At 48 h, all test agents showed similar, but high levels of cytotoxicity. CONCLUSION NAC and taurolidine were effective against E. faecalis in planktonic state, at the expense of demonstrating cytotoxic effects. For both planktonic and biofilm forms of E. faecalis, neither NAC nor taurolidine offered any advantage over CH.
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Affiliation(s)
- Ayca Tuba Ulusoy
- Department of Pediatric Dentistry, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Elif Kalyoncuoğlu
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Ahu Reis
- Department of Microbiology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Zafer C Cehreli
- Department of Pediatric Dentistry, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Eyüboğlu GB, Yeşilyurt C, Ertürk M. Evaluation of Cytotoxicity of Dentin Desensitizing Products. Oper Dent 2015; 40:503-14. [DOI: 10.2341/13-334-l] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives
To evaluate the cytotoxic effects of the dentin desensitizing products (DDPs) used in the treatment of dentin hypersensitivity on cultured human gingival and pulpal fibroblast cells.
Methods and Materials
The cytotoxic effects of DDPs (Smart Protect, Systemp Desensitizer, Seal & Protect, Aqua-Prep F, Isodan, Gluma, BisBlock, D/Sense Crystal, UltraEZ, Colgate Sensitive Pro-Relief, Topex, and Clinpro White Varnish) on cultured human gingival- and pulp-derived fibroblast cells were evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test (Serva, Heidelberg, Germany) under two different conditions. In the first test, different dilutions of the DDPs were directly applied onto cultured gingival fibroblast cells, and in the second test, the products were applied onto different-thickness dentin discs (0.5 and 1 mm) placed above cell culture medium, which contained pulp fibroblast cells.
Results
According to the cytotoxicity evaluations of gingival fibroblast cells, the cytotoxicity of all of the DDPs was very high at 50% concentrations (p<0.05). Colgate Sensitive Pro-Relief, Clinpro White Varnish, and Topex showed higher cytotoxicity than did the other products (p<0.05), decreasing with further dilutions, and these products were found to be less cytotoxic to both types of cells (p<0.05) than were the other products with further dilutions. The cytotoxicity to human gingival and pulpal fibroblast cells of Systemp Desensitizer, Aqua-Prep F, Isodan, and Gluma did not show any decrease with further dilutions, and these products were found to be more cytotoxic than the other products (p<0.05).
Conclusions
According to the findings of this study, Colgate Sensitive Pro-Relief, Topex, and Clinpro White Varnish were less cytotoxic than the other DDPs used in this study.
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Affiliation(s)
- GB Eyüboğlu
- Güneş Bulut Eyüboğlu, DDS, PhD, Karadeniz Technical University, School of Dentistry, Kanuni Campus, Trabzon, Turkey
| | - C Yeşilyurt
- Cemal Yesilyurt, DDS, PhD, Karadeniz Technical University, School of Dentistry, Kanuni Campus, Trabzon, Turkey
| | - M Ertürk
- Murat Ertürk, PhD, Atigen-cell Technology, Trabzon, Turkey
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Ma J, Tong Z, Ling J, Liu H, Wei X. The effects of sodium hypochlorite and chlorhexidine irrigants on the antibacterial activities of alkaline media against Enterococcus faecalis. Arch Oral Biol 2015; 60:1075-81. [DOI: 10.1016/j.archoralbio.2015.04.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Revised: 04/16/2015] [Accepted: 04/19/2015] [Indexed: 10/23/2022]
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Galoza MOG, Kuga MC, Silva DFD, Weckwerth PH, Keine KC, Pereira JR, Andrade MFD. Efeitos da dentina sobre o pH e atividade antimicrobiana de diversas formulações com hidróxido de cálcio. REVISTA DE ODONTOLOGIA DA UNESP 2015. [DOI: 10.1590/1807-2577.1037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objetivo Avaliar o efeito da dentina sobre o pH e a atividade antimicrobiana de formulações com hidróxido de cálcio. Material e método O pH e a atividade antimicrobiana das formulações (G1- polietilenoglicol, G2- glicerina e paramonoclorofenol canforado ou G3- clorexidina) foram analisados nas formulações puras (G1A, G2A e G3A) ou acrescidas de dentina em pó (G1B, G2B e G3B). Tubos de polietileno foram preenchidos com uma das formulações e imersos em água destilada. O pH foi analisado após 24 horas, 7, 14 e 21 dias. A atividade antimicrobiana foi avaliada sobre Enterococcus faecalis (ATCC 29212), através do teste de difusão em ágar. Os resultados foram submetidos aos testes de ANOVA e Tukey (p=0,05). Resultado A dentina não exerceu efeito sobre o pH das formulações, exceto ocasionando a redução em G1, no período de 24 horas (p<0,05). Nas demais formulações, não houve interferência da dentina sobre o pH (p>0,05). Quando comparados entre os grupos, em 24 horas e 7 dias, G1A e G1B apresentaram menor pH (p<0,05). Em 14 dias, G2A, G2B, G3A e G3B demonstraram similar pH (p>0,05), assim como entre G3B e G1A (p>0,05). Em 21 dias, todas as formulações demonstram semelhante pH (p>0,05). Os resultados em ordem decrescente da atividade antimicrobiana foram G2A=G2B>G3A=G3B>G1A=G1B (p<0,05). Conclusão A dentina não interferiu no pH e na atividade antimicrobiana das diferentes formulações com hidróxido de cálcio, exceto na associação com o polietilenoglicol, em que ocasionou a redução do pH apenas no período de 24 horas. A formulação com paramonoclorofenol canforado apresentou maior atividade antimicrobiana, seguida da clorexidina e do polietilenoglicol.
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Guneser MB, Arslan D, Usumez A. Tissue Dissolution Ability of Sodium Hypochlorite Activated by Photon-initiated Photoacoustic Streaming Technique. J Endod 2015; 41:729-32. [DOI: 10.1016/j.joen.2015.01.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 01/19/2015] [Indexed: 11/30/2022]
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Forghani M, Mashhoor H, Rouhani A, Jafarzadeh H. Comparison of pH changes induced by calcium enriched mixture and those of calcium hydroxide in simulated root resorption defects. J Endod 2014; 40:2070-3. [PMID: 25442726 DOI: 10.1016/j.joen.2014.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 09/12/2014] [Accepted: 09/16/2014] [Indexed: 10/24/2022]
Abstract
INTRODUCTION External resorption usually occurs after dental trauma and the loss of root cementum. Because it has the ability to induce alkaline pH, calcium hydroxide is used in treatment of external resorption, which is reportedly not free from disadvantages. Driven by such understanding, the aim of this in vitro study was to compare the pH changes induced by calcium enriched mixture (CEM) and those of calcium hydroxide in simulated root resorption defects. METHODS Twenty-one paired extracted human premolars were cut to the length of 14 mm. Root canal preparation was performed by using ProTaper rotary system. Cavities of 0.7-mm depth and 1.4-mm diameter were prepared on the external root surface, 5 mm from the apex. Half of the teeth were filled with CEM and the other half with calcium hydroxide. Five premolars were also assigned as the negative control group and filled with normal saline. To be assured of the filling quality, a radiograph was obtained from each tooth. Subsequently, pH of the cavity was measured with a microelectrode at 20-minute, 3-hour, and 1-, 7-, 14-, 21-, and 28-day intervals after filling. RESULTS Mean pH in the CEM and in the calcium hydroxide groups were significantly varied during the study period, with pH of the calcium hydroxide group significantly higher than that of CEM in all of the measurements. However, no significant difference was observed between the pH of the calcium hydroxide group and that of the control group at the 7-day and 14-day measurements and between those of the CEM group and the control group at days 7, 21, and 28. CONCLUSIONS In comparison with calcium hydroxide, CEM hardly maintained alkaline pH during the first month of use, and so CEM may be an inappropriate material in treatment of external root resorption.
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Affiliation(s)
- Maryam Forghani
- Dental Materials Research Center, Faculty of Dentistry, Department of Endodontics, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Armita Rouhani
- Dental Research Center, Faculty of Dentistry, Department of Endodontics, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Jafarzadeh
- Dental Research Center, Faculty of Dentistry, Department of Endodontics, Mashhad University of Medical Sciences, Mashhad, Iran.
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Zare Jahromi M, Ranjbarian P, Shiravi S. Cytotoxicity evaluation of Iranian propolis and calcium hydroxide on dental pulp fibroblasts. J Dent Res Dent Clin Dent Prospects 2014; 8:130-3. [PMID: 25346830 PMCID: PMC4206753 DOI: 10.5681/joddd.2014.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Accepted: 10/04/2014] [Indexed: 11/17/2022] Open
Abstract
Background and aims. Since intracanal medicaments can affect the cell viability in periapical tissues, the aim of this study was to evaluate the effect of calcium hydroxide and propolis on pulp fibroblasts. Materials and methods. Two healthy third molars were used as a source to obtain fibroblasts. The fibroblasts were cultured and subjected to 1 mg/mL of propolis and calcium hydroxide. This experiment was performed in six replicates and cell viability was evaluated with MTT assay. Statistical analysis was performed by t-test. Results. Comparison of cell viability with the use of 1 mg/mL of calcium hydroxide and propolis showed that cells subjected to propolis were more viable when compared to calcium hydroxide (P < 0.05). Conclusion. In this study, calcium hydroxide reduced fibroblast viability, significantly more than Iranian propolis. Other properties should be evaluated before Iranian propolis could be indicated for use as intracanal medicament.
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Affiliation(s)
- Maryam Zare Jahromi
- Assistant Professor, Department of Endodontics, Faculty of Dentistry, Islamic Azad University Khorasgan (Isfahan) Branch, Isfahan, Iran
| | - Parisa Ranjbarian
- Post-graduate Student, Department of Endodontics, Faculty of Dentistry, Islamic Azad University, Khorasgan (Isfahan) Branch, Isfahan, Iran
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Herczegh A, Gyurkovics M, Ghidan Á, Megyesi M, Lohinai Z. Effect of dentin powder on the antimicrobial properties of hyperpure chlorine-dioxide and its comparison to conventional endodontic disinfecting agents. Acta Microbiol Immunol Hung 2014; 61:209-20. [PMID: 25046882 DOI: 10.1556/amicr.61.2014.2.10] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Previously we found that the high purity chlorine-dioxide(ClO2) has a very potent disinfectant efficacy on oral pathogenic microorganisms and as a root canal irrigant it is able to eliminate the experimental Enterococcus faecalis(E. faecalis) infection from the root canal system. This study examines whether the presence of dentin powder influences the antibacterial efficacy of ClO 2. METHODS In an in vitro dentin powder model the following irrigants were tested against planktonic E. faecalis: 2% chlorhexidine (CHX), 2.5% sodium hypochlorite (NaOCl), 0.12%ClO2 (Solumium) and one local root canal medicament: saturated Ca(OH)2. Survival of bacteria exposed to agents without and with human dentin powder or preincubated with dentin powder was investigated. The effect of the dentin powder on ClO2 concentration was investigated by titrations. RESULTS Without dentin powder ClO 2 killed all E. faecalis and delivered the best result already after 1 minute; however, after longer contact time with dentin the difference between the disinfectants disappeared. The presence of dentin powder decreased the concentration of ClO 2 and attenuated the antibacterial efficiency of ClO2 and Ca(OH)2, but did not decrease of CHX and NaOCl.Preincubation with dentin powder caused significant loss of antibacterial activity of all investigated agents, ClO2 and Ca(OH)2 having the highest reduction. CONCLUSION As the presence of dentin powder had a negative effect on the efficacy of disinfectants, the importance of elimination of dentin scrapings and smear layer from the root canal system during endodontic treatments is highly recommended. ClO 2 can be effective for a final rinse.
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Affiliation(s)
- Anna Herczegh
- 1 Semmelweis University Department of Conservative Dentistry Budapest Hungary
| | - Milán Gyurkovics
- 1 Semmelweis University Department of Conservative Dentistry Budapest Hungary
| | - Ágoston Ghidan
- 2 Semmelweis University Department of Medical Microbiology Budapest Hungary
| | - Marianna Megyesi
- 3 Budapest University of Technology and Economics Department of Physics Budapest Hungary
| | - Zsolt Lohinai
- 1 Semmelweis University Department of Conservative Dentistry Budapest Hungary
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Muhammad OH, Chevalier M, Rocca JP, Brulat-Bouchard N, Medioni E. Photodynamic therapy versus ultrasonic irrigation: interaction with endodontic microbial biofilm, an ex vivo study. Photodiagnosis Photodyn Ther 2014; 11:171-81. [PMID: 24583092 DOI: 10.1016/j.pdpdt.2014.02.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 02/08/2014] [Accepted: 02/10/2014] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Photodynamic therapy was introduced as an adjuvant to conventional chemo-mechanical debridement during endodontic treatment to overcome the persistence of biofilms. The aim of this study was to evaluate the ability of photodynamic therapy (PDT) to disrupt an experimental microbial biofilm inside the root canal in a clinically applicable working time. MATERIALS AND METHODS Thirty extracted teeth were prepared and then divided in three groups. All samples were infected with an artificially formed biofilm made of Enterococcus faecalis, Streptococcus salivarius, Porphyromonas gingivalis and Prevotella intermedia bacteria. First group was treated with Aseptim Plus® photo-activated (LED) disinfection system, second group by a 650 nm Diode Laser and Toluidine blue as photosensitizer, and the third group, as control group, by ultrasonic irrigation (PUI) using EDTA 17% and NaOCl 2.6% solutions. The working time for all three groups was fixed at 3 min. Presence or absence of biofilm was assessed by aerobic and anaerobic cultures. RESULTS There was no statistically significant difference between results obtained from groups treated by Aseptim Plus® and Diode Laser (P<0.6267). In cultures of both groups there was a maximal bacterial growth. The group that was treated by ultrasonic irrigation and NaOCl and EDTA solutions had the best results (P<0.0001): there was a statistically significant reduction of bacterial load and destruction of microbial biofilm. CONCLUSION Under the condition of this study, Photodynamic therapy could not disrupt endodontic artificial microbial biofilm and could not inhibit bacterial growth in a clinically favorable working time.
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Affiliation(s)
- Omid H Muhammad
- Laboratory of Oral Health and Aging, URE 001, Faculty of Dentistry, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France
| | - Marlene Chevalier
- Laboratory of Oral Health and Aging, URE 001, Faculty of Dentistry, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France
| | - Jean-Paul Rocca
- Laboratory of Oral Health and Aging, URE 001, Faculty of Dentistry, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France; Restorative Dentistry and Endodontics Department, Faculty of Dentistry, University of Nice-Sophia Antipolis, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France; Pôle Odontologie, CHU Nice Saint Roch, 5 rue Pierre Devoluy, 06000 Nice, France
| | - Nathalie Brulat-Bouchard
- Laboratory of Oral Health and Aging, URE 001, Faculty of Dentistry, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France; Restorative Dentistry and Endodontics Department, Faculty of Dentistry, University of Nice-Sophia Antipolis, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France; Pôle Odontologie, CHU Nice Saint Roch, 5 rue Pierre Devoluy, 06000 Nice, France
| | - Etienne Medioni
- Laboratory of Oral Health and Aging, URE 001, Faculty of Dentistry, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France; Restorative Dentistry and Endodontics Department, Faculty of Dentistry, University of Nice-Sophia Antipolis, 24, Avenue des Diables Bleus, 06357 Nice Cedex 4, France; Pôle Odontologie, CHU Nice Saint Roch, 5 rue Pierre Devoluy, 06000 Nice, France.
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dos Santos LGP, Felippe WT, Teixeira CS, Bortoluzzi EA, Felippe MCS. Endodontic re-instrumentation enhances hydroxyl ion diffusion through radicular dentine. Int Endod J 2013; 47:776-83. [DOI: 10.1111/iej.12217] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Accepted: 11/14/2013] [Indexed: 12/01/2022]
Affiliation(s)
- L. G. P. dos Santos
- Postgraduate Program; Federal University of Santa Catarina; Florianopolis Santa Catarina Brazil
| | - W. T. Felippe
- Department of Dentistry; Federal University of Santa Catarina; Florianopolis Santa Catarina Brazil
| | - C. S. Teixeira
- Department of Dentistry; Federal University of Santa Catarina; Florianopolis Santa Catarina Brazil
| | - E. A. Bortoluzzi
- Department of Dentistry; Federal University of Santa Catarina; Florianopolis Santa Catarina Brazil
| | - M. C. S. Felippe
- Department of Dentistry; Federal University of Santa Catarina; Florianopolis Santa Catarina Brazil
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de Almeida LHS, Leonardo NGES, Gomes APN, Souza EM, Pappen FG. Influence of EDTA and dentine in tissue dissolution ability of sodium hypochlorite. AUST ENDOD J 2013; 41:7-11. [PMID: 24171764 DOI: 10.1111/aej.12044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This study verified whether ethylenediaminetetraacetic acid (EDTA) influences the pulp tissue dissolution capability of different concentrations of NaOCl, in the presence of dentine. NaOCl and EDTA solutions were simultaneously mixed in flasks either containing a dentine disc or those not containing a dentine disc. Previously weighed bovine pulp tissues were immersed in the solutions for 5, 15 and 30 min. The weight loss was measured. The dissolution tests were performed in triplicate. Univariate analysis of variance, along with further Tukey's honestly significant difference pairwise comparisons, was used to verify the effect of EDTA, different concentrations of NaOCl, dentine and time of incubation on the tissue dissolution. Higher concentrations of NaOCl increased the tissue dissolution. EDTA reduced the capacity of NaOCl to dissolve pulp tissue, even in presence of dentine. Dentine negatively affects the capacity of NaOCl to dissolve pulp tissue. In conclusion, the presence of EDTA and dentine negatively affects the tissue dissolution ability of NaOCl.
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Persoon IF, Hoogenkamp MA, Bury A, Wesselink PR, Hartog AF, Wever R, Crielaard W. Antimicrobial Effect of a Modified Vanadium Chloroperoxidase on Enterococcus faecalis Biofilms at Root Canal pH. J Endod 2013; 39:1035-8. [DOI: 10.1016/j.joen.2013.04.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 04/15/2013] [Accepted: 04/23/2013] [Indexed: 11/17/2022]
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Furusawa M, Yoshida T, Hosokawa S, Ariizumi Y. Current trends in use of intracanal medications in dental care facilities: questionnaire-based survey on training dental hygienists at educational institutions. THE BULLETIN OF TOKYO DENTAL COLLEGE 2013; 54:45-50. [PMID: 23614952 DOI: 10.2209/tdcpublication.54.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The success of root canal therapy is dependent not only on removal of infected pulp (pulpectomy) followed by root canal enlargement, but also on the pharmacological effects of intracanal medications. Various intracanal medications are used. Formaldehyde preparations such as formocresol were common in the past, but these are no longer used in Europe or the US due to the biological toxicity of formaldehyde. In this study, a questionnaire was used to determine current trends in the use of intracanal medications at dental care facilities where dental hygiene students undergo practical training. The questionnaire comprised questions regarding the types of frequently used intracanal medications and their methods of application at dental care facilities in Saitama and Shizuoka prefectures. The results indicated that calcium hydroxide preparations were more commonly used in Europe or the US. However, these results also revealed that formaldehyde preparations were frequently used, which slightly differs from the scenario in Europe and the US. This study revealed that multiple intracanal medications were used for root canal therapy. Furthermore, it was also observed that cotton plugs were generally used as applicator tips for intracanal medications, whereas the use of absorbent paper points was relatively uncommon. The results suggest that the cost of absorbent paper points needs to be reduced.
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Affiliation(s)
- Masahiro Furusawa
- Department of Clinical Oral Health Science, Tokyo Dental College, Misaki-cho, Chiyoda-ku, Tokyo, Japan.
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Mohammadi Z, Shalavi S, Yazdizadeh M. Antimicrobial activity of calcium hydroxide in endodontics: a review. Chonnam Med J 2012; 48:133-40. [PMID: 23323217 PMCID: PMC3539092 DOI: 10.4068/cmj.2012.48.3.133] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 09/25/2012] [Accepted: 09/26/2012] [Indexed: 11/06/2022] Open
Abstract
The purpose of endodontic therapy is to preserve the patient's natural teeth without compromising the patient's local or systemic health. Calcium hydroxide has been included in several materials and antimicrobial formulations that are used in several treatment modalities in endodontics, such as inter-appointment intracanal medicaments. The purpose of this article was to review the antimicrobial properties of calcium hydroxide in endodontics. Calcium hydroxide has a high pH (approximately 12.5-12.8) and is classified chemically as a strong base. The lethal effects of calcium hydroxide on bacterial cells are probably due to protein denaturation and damage to DNA and cytoplasmic membranes. Calcium hydroxide has a wide range of antimicrobial activity against common endodontic pathogens but is less effective against Enterococcus faecalis and Candida albicans. Calcium hydroxide is also a valuable anti-endotoxin agent. However, its effect on microbial biofilms is controversial.
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Affiliation(s)
- Z Mohammadi
- Department of Endodontics, School of Dentistry, Hamedan University of Medical Sciences, Hamedan, Iran. ; Iranian Center for Endodontic Research (ICER), Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Atila-Pektaş B, Yurdakul P, Gülmez D, Görduysus O. Antimicrobial effects of root canal medicaments against Enterococcus faecalis and Streptococcus mutans. Int Endod J 2012; 46:413-8. [PMID: 23095092 DOI: 10.1111/iej.12004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Accepted: 09/05/2012] [Indexed: 02/02/2023]
Abstract
AIM To compare the antimicrobial activities of Activ Point (Roeko, Langenau, Germany), Calcium Hydroxide Plus Point (Roeko, Langenau, Germany), calcium hydroxide, 1% chlorhexidine gel and bioactive glass (S53P4) against Enterococcus faecalis and Streptococcus mutans. METHODOLOGY One hundred and twenty extracted single-rooted human teeth were used. After removing the crowns, root canals were prepared by using the Protaper rotary system. Following autoclave sterilization, root canals were incubated at 37 °C with E. faecalis ATCC 29212 and S. mutans RSHM 676 for 1 week. The specimens, which were divided into five treatment groups for each microorganism according to the intracanal medicament used, were tested in 10 experimental runs. In each experimental run, 10 roots were included as treatment, one root as positive control and one root as sterility control. Sterile paper points were utilized to take samples from root canals after the incubation of teeth in thioglycollate medium at 37 °C for 1 week. Samples taken from teeth by sterile paper points were inoculated onto sheep blood agar, and following an overnight incubation, the colonies grown on sheep blood agar were counted and interpreted as colony-forming units. Results were tested statistically by using Kruskal-Wallis and Conover's nonparametric multiple comparison tests. RESULTS CHX gel (P < 0.001 and P < 0.001), Activ Point (P = 0.003 and P = 0.002) and Ca(OH)₂ (P = 0.010 and P = 0.005) were significantly more effective against E. faecalis than that of Ca(OH)₂ Plus Point and bioactive glass, respectively. On the other hand, compared with Ca(OH)₂ , CHX gel (P < 0.001), and Activ Point (P < 0.001), bioactive glass (P = 0.014) produced significantly lower colony counts of S. mutans. When compared with the positive control, treatment with Ca(OH)₂ Plus Point (P = 0.085 and P = 0.066) did not produce significantly lower colony counts of E. faecalis and S. mutans, respectively. CONCLUSIONS Compared with the medicaments having an antimicrobial effect because of their alkaline pH, the medicaments containing chlorhexidine were effective against both E. faecalis and S. mutans.
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Affiliation(s)
- B Atila-Pektaş
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
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Sangwan P, Sangwan A, Duhan J, Rohilla A. Tertiary dentinogenesis with calcium hydroxide: a review of proposed mechanisms. Int Endod J 2012; 46:3-19. [PMID: 22889347 DOI: 10.1111/j.1365-2591.2012.02101.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 06/25/2012] [Indexed: 11/30/2022]
Abstract
Calcium hydroxide has been used extensively in dentistry for a century. Despite its widespread use as a pulp-capping agent, its mechanisms of action still remain ambiguous. Understanding its modes of action will lead to a broader understanding of the mechanisms associated with induced dentinogenesis and help in optimizing the currently available agents to target specific regenerative processes to obtain the best possible clinical outcomes. A literature search relating to mechanisms of dentinogenesis of calcium hydroxide up to December 2011 was carried out using pubmed and MEDLINE database searches as well as manual searching of cross-references from identified studies. Resulting suggestions regarding dentinogenic mechanisms of calcium hydroxide range from direct irritating action of the material to induction of release of biologically active molecules. The purpose of this article is to discuss various mechanisms through which calcium hydroxide may induce tertiary dentinogenesis in the light of observations made in included studies.
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Affiliation(s)
- P Sangwan
- Department of Conservative Dentistry, Government Dental College, Pt. B.D. Sharma University of Health Sciences, Rohtak, Haryana, India.
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39
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Effect of Ultrasonic Activation on pH and Calcium Released by Calcium Hydroxide Pastes in Simulated External Root Resorption. J Endod 2012; 38:834-7. [DOI: 10.1016/j.joen.2012.03.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/05/2012] [Accepted: 03/11/2012] [Indexed: 11/22/2022]
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Quah SY, Wu S, Lui JN, Sum CP, Tan KS. N-acetylcysteine inhibits growth and eradicates biofilm of Enterococcus faecalis. J Endod 2011; 38:81-5. [PMID: 22152626 DOI: 10.1016/j.joen.2011.10.004] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 10/04/2011] [Accepted: 10/16/2011] [Indexed: 11/29/2022]
Abstract
INTRODUCTION The aims of this study were to evaluate the antibacterial and biofilm eradication efficacies of N-acetylcysteine (NAC) on Enterococcus faecalis. METHODS The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of NAC on E. faecalis were determined. In addition, the ability of dentin powder to neutralize the antibacterial activity of NAC was examined. Calcium hydroxide, a commonly used intracanal medicament, was included as a comparison. The efficacy of NAC on E. faecalis biofilms was tested by exposure of 21-day old E. faecalis biofilms to NAC. RESULTS NAC was most bactericidal at pH 11 with MIC and MBC of 1.56 mg/mL and 12.5 mg/mL, respectively. Although preincubation of calcium hydroxide with dentin powder abolished its antibacterial effects, NAC completely killed E. faecalis regardless of dentin powder preincubation. In addition, prolonged incubation of NAC with dentin powder (up to 3 weeks) did not significantly reduce its antibacterial activity on E. faecalis. Furthermore, NAC also effectively eradicated E. faecalis biofilms. CONCLUSIONS NAC was bactericidal against both the planktonic and biofilm forms of E. faecalis. This antibacterial property of NAC was unaffected by the presence of dentin.
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Affiliation(s)
- Samantha Yiling Quah
- Discipline of Oral Biology, Faculty of Dentistry, National University of Singapore, Singapore
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Zhang Y, Wang Y. The effect of hydroxyapatite presence on the degree of conversion and polymerization rate in a model self-etching adhesive. Dent Mater 2011; 28:237-44. [PMID: 22032933 DOI: 10.1016/j.dental.2011.10.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 05/26/2011] [Accepted: 10/04/2011] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The effect of hydroxyapatite (HAp) content on photopolymerization of a model self-etching adhesive was studied by using attenuated total reflectance Fourier transform infrared (ATR/FT-IR) spectroscopy. MATERIALS AND METHODS The model adhesive contained two monomers: bis[2-(methacryloyloxy)ethyl] phosphate (2MP) and 2-hydroxyethyl methacrylate (HEMA) using a 1:1 mass ratio, representing an acidic formulation. Camphorquinone and ethyl 4-dimethylaminobenzoate were added to enable visible light photopolymerization in a constant concentration of 0.022 mmol per gram monomer. HAp [Ca(10)(OH)(2)(PO(4))(6)] powder were added to the test solutions to obtain mass fraction of 0, 1, 2, 3, and 4 wt%. The degree of conversion (DC) and the polymerization rate (PR) with/without HAp were determined using ATR/FT-IR with a time-based spectrum analysis. RESULTS Monomer DC and PR were significantly enhanced by addition of HAp. Incorporation of 4 wt% of HAp increased DC from 20.8 (±0.3) % to 93.4 (±1.1) %, and PR from 0.42 (±0.01) %/s to 3.21 (±0.07) %/s. The pH of adhesive solutions was measured and correlated with DC and PR. The pH of test solutions was also controlled using a base (sodium hydroxide, NaOH) to similar values as when using HAp. Results indicated that both the DC and PR increased with increasing pH, regardless of additive, confirming the role of pH on polymerization. From the IR spectral comparison, changes in molecular structures of the self-etching adhesive after the addition of HAp were observed, which were correlated with the specific interaction between 2MP and HAp. The effect of viscosity was also proposed to be another possible reason for the improved polymerization. SIGNIFICANCE The photopolymerization of a self-etching adhesive was enhanced/accelerated in the presence of HAp. The results provide the critical information for understanding the interactions/bonding between self-etching adhesives and tooth substrates.
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Affiliation(s)
- Ying Zhang
- University of Missouri-Kansas City School of Dentistry, Kansas City, MO 64108, USA
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Bakry AS, Tamura Y, Otsuki M, Kasugai S, Ohya K, Tagami J. Cytotoxicity of 45S5 bioglass paste used for dentine hypersensitivity treatment. J Dent 2011; 39:599-603. [PMID: 21726598 DOI: 10.1016/j.jdent.2011.06.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 06/13/2011] [Accepted: 06/16/2011] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES 45S5 bioglass mixed with 50% phosphoric acid has been suggested to treat dentine hypersensitivity and incipient enamel caries. This study is going to evaluate the biocompatibility of using the aforementioned technique with the rat pulpal cells. METHODS The relative cytotoxicity of 45S5 bioglass on rat dental pulp cells was compared to the cytotoxicity of a temporary filling material (Caviton; GC, Japan), Type 1 glass ionomer cement (Fuji I; GC, Tokyo, Japan) and commercial desensitising agent (SuperSeal; Phoenix Dental, Fenton, MI, USA) using a transwell insert model. Cell viability was measured by means of a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The number of viable cell counts were compared using one way ANOVA (p<0.05). The morphological alterations of the pulp cells were observed directly by phase contrast microscope. RESULTS The results of this study indicated that cell viability recorded by the 45S5 bioglass paste group did not differ significantly from those of the Caviton, glass ionomer or superseal, moreover pulpal cells microscopic analysis revealed that 45S5 bioglass elicited minimal toxic effect. CONCLUSIONS 45S5 bioglass paste can serve as a biocompatible material that can potentially be used safely on dentine.
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Affiliation(s)
- Ahmed Samir Bakry
- Cariology and Operative Dentistry Department, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan.
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Mohammadi Z, Dummer PMH. Properties and applications of calcium hydroxide in endodontics and dental traumatology. Int Endod J 2011; 44:697-730. [PMID: 21535021 DOI: 10.1111/j.1365-2591.2011.01886.x] [Citation(s) in RCA: 339] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Calcium hydroxide has been included within several materials and antimicrobial formulations that are used in a number of treatment modalities in endodontics. These include, inter-appointment intracanal medicaments, pulp-capping agents and root canal sealers. Calcium hydroxide formulations are also used during treatment of root perforations, root fractures and root resorption and have a role in dental traumatology, for example, following tooth avulsion and luxation injuries. The purpose of this paper is to review the properties and clinical applications of calcium hydroxide in endodontics and dental traumatology including its antibacterial activity, antifungal activity, effect on bacterial biofilms, the synergism between calcium hydroxide and other agents, its effects on the properties of dentine, the diffusion of hydroxyl ions through dentine and its toxicity. Pure calcium hydroxide paste has a high pH (approximately 12.5-12.8) and is classified chemically as a strong base. Its main actions are achieved through the ionic dissociation of Ca(2+) and OH(-) ions and their effect on vital tissues, the induction of hard-tissue deposition and the antibacterial properties. The lethal effects of calcium hydroxide on bacterial cells are probably due to protein denaturation and damage to DNA and cytoplasmic membranes. It has a wide range of antimicrobial activity against common endodontic pathogens but is less effective against Enterococcus faecalis and Candida albicans. Calcium hydroxide is also an effective anti-endotoxin agent. However, its effect on microbial biofilms is controversial.
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Affiliation(s)
- Z Mohammadi
- Department of Endodontics, Hamedan University of Medical Sciences, Hamedan, Iran.
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Heward S, Sedgley CM. Effects of intracanal mineral trioxide aggregate and calcium hydroxide during four weeks on pH changes in simulated root surface resorption defects: an in vitro study using matched pairs of human teeth. J Endod 2011; 37:40-4. [PMID: 21146074 DOI: 10.1016/j.joen.2010.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 08/29/2010] [Accepted: 09/19/2010] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Diffusion of hydroxyl ions from intracanal calcium hydroxide (CH) through dentin is used to arrest external inflammatory root resorption. However, long-term and short-term CH placement has been associated with an increased risk of root fracture. Intracanal mineral trioxide aggregate (MTA) might provide an alternative to CH as a source of hydroxyl ions. This in vitro study compared the effects of intracanal MTA and CH on hydroxyl ion diffusion through dentin by measuring pH changes over time in simulated root surface resorption defects prepared in matched pairs of teeth; the null hypothesis tested was that there is no difference. METHODS Root surface cavities were prepared 5 mm from the apex in extracted human permanent anterior teeth (21 matched pairs) and 7 additional teeth (controls). Root canals were instrumented to size 50/.04 and filled with either tooth-colored MTA (ProRoot) or CH (UltraCal XS); control teeth were filled with saline. The pH in root surface cavities was measured at 3 hours, 24 hours, 1 week, 2 weeks, 3 weeks, and 4 weeks. RESULTS In controls, pH readings did not differ significantly during the 4 weeks (P > .05, repeated-measures analysis of variance [ANOVA]). For the experimental intragroup effects, significant pH changes occurred over time in the MTA group (P = .005, repeated-measures ANOVA) and the CH group (P < .0001). For the experimental intergroup effects, the overall mean pH was higher in the MTA group (8.66; standard error [SE], 0.07) compared with the CH group (8.46; SE, 0.07) (P = .014, paired t test). At 4 weeks pH was higher in the MTA group (8.30; SE, 0.16) compared with the CH group (7.90; SE, 0.11) (P = .011); at all other time points intergroup differences were insignificant. The null hypothesis was rejected. CONCLUSIONS Intracanal MTA and CH groups differed in their overall effect on pH measured in simulated root surface resorption defects. At 4 weeks intracanal placement of MTA compared with CH resulted in a small but significantly higher pH.
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Affiliation(s)
- Sarah Heward
- Department of Endodontology, School of Dentistry, Oregon Health & Science University, Portland, OR 97239, USA
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Hansen SW, Marshall JG, Sedgley CM. Comparison of Intracanal EndoSequence Root Repair Material and ProRoot MTA to Induce pH Changes in Simulated Root Resorption Defects over 4 Weeks in Matched Pairs of Human Teeth. J Endod 2011; 37:502-6. [PMID: 21419298 DOI: 10.1016/j.joen.2011.01.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 01/04/2011] [Accepted: 01/15/2011] [Indexed: 11/30/2022]
Affiliation(s)
- Stephen W Hansen
- Department of Endodontology, School of Dentistry, Oregon Health and Science University, Portland, Oregon, USA
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Barcellos DC, Borges AB, Silva RCDSP, Ribeiro LM, Pucci CR, Rocha Gomes Torres C. pH-changes during intracoronal bleaching: an in vivo study. J Contemp Dent Pract 2011; 12:109-113. [PMID: 22186753 DOI: 10.5005/jp-journals-10024-1018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVES This study aimed to measure pH changes during 14 days intracoronal bleaching with hydrogen peroxide/sodium perborate and carbamide peroxide/sodium perborate. MATERIALS AND METHODS Twenty patients presenting endodontically treated central maxillary incisors with color alterations were divided in two groups (n = 10): Group CP + SP: 37% carbamide peroxide + sodium perborate paste; Group HP + SP: 30% hydrogen peroxide + sodium perborate paste. The pH values were measured using a digital microprocessor at different times: Baseline, 2, 7 and 14 days. Data were analyzed with two-way ANOVA followed by Tukey's test (α = 0.05). RESULTS ANOVA showed p < 0.00 which indicated significant difference between the groups. The mean values (± sd) and the results of the Tukey´s test were: HP + SP/14 days-7.98 (±0.58)a; HP + SP/7 days-8.59 (±0.18)b; HP + SP/2 days- 8.83 (±0.32)bc; HP + SP/Baseline-8.83 (±0.01)bc; CP + SP/ Baseline-8.89 (±0.01)bc; CP + SP/14 days-9.11 (±0.58)cd; CP + SP/7 days-9.54 (±0.16)de; CP + SP/2 days-9.66 (±0.08) de. The group HP + SP resulted in significantly lower pH values compared with group CP + SP. CONCLUSION It can be concluded that both associations showed alkaline pH values; however, there was significant reduction in the pH values of the 30% hydrogen peroxide associated with sodium perborate after 14 days. CLINICAL SIGNIFICANCE The association of hydrogen peroxide and carbamide peroxide with sodium perborate paste presented alkaline characteristics during the 14-day evaluated period. Thus, regarding pH changes, both associations can be considered safe as intracoronal bleaching agents.
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Affiliation(s)
- Daphne Camara Barcellos
- Department of Restorative Dentistry, São Josédos Campos School of Dentistry, São Paulo State University, São Paulo, Brazil
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Narita H, Itoh S, Imazato S, Yoshitake F, Ebisu S. An explanation of the mineralization mechanism in osteoblasts induced by calcium hydroxide. Acta Biomater 2010; 6:586-90. [PMID: 19665060 DOI: 10.1016/j.actbio.2009.08.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 07/29/2009] [Accepted: 08/03/2009] [Indexed: 11/26/2022]
Abstract
Calcium hydroxide (Ca(OH)(2)) has been broadly used in endodontics, including apexification to obtain apical closure by mineralization. However, the detailed mechanism of mineralization induced by Ca(OH)(2) is still unclear. This study focuses on the function of calcium and hydroxyl ions which dissociate from Ca(OH)(2) during the mineralization process. Though primary osteoblasts cultured in the medium without or with 0.025mgml(-1) Ca(OH)(2) did not show mineralization, they did exhibit mineralization when they were cultured with a higher concentration of Ca(OH)(2) (0.25mgml(-1)). Mineralization induced in the presence of 0.25mgml(-1) Ca(OH)(2) was greater at pH 7.4 than at pH 8.5. The high mineralization activity observed under neutral conditions was caused by the prolonged activation of p38 and JNK. Hydroxyl ions did not have any effect on the mineralization. The results demonstrate that calcium ions dissociated from Ca(OH)(2) are critical for inducing the mineralization of osteoblasts.
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Particle size and shape of calcium hydroxide. J Endod 2009; 35:284-7. [PMID: 19166791 DOI: 10.1016/j.joen.2008.11.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2008] [Revised: 11/13/2008] [Accepted: 11/13/2008] [Indexed: 11/22/2022]
Abstract
The aim of this study was to examine the particle length, width, perimeter, and aspect ratio of calcium hydroxide powder using a flow particle image analyzer (FPIA). Five sample groups each with 10 mg of calcium hydroxide were mixed with 15 mL of alcohol and sonicated. Digital images of the particle samples were taken using the FPIA and analyzed with a one-way analysis of variance. The overall averages +/- standard deviation among the five groups for particle length (microm), width (microm), perimeter (microm), and aspect ratio were 2.255 +/- 1.994, 1.620 +/- 1.464, 6.699 +/- 5.598, and 0.737 +/- 0.149, respectively. No statistical significance was observed among the groups for all parameters. When the total of 46,818 particles from all five groups were classified into the five length categories of 0.5-microm increments, there were significant differences in width, perimeter, and aspect ratio (all p values <0.0001). In conclusion, calcium hydroxide particles have a size and shape that may allow direct penetration into open dentin tubules.
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Miletic V, Santini A, Trkulja I. Quantification of monomer elution and carbon-carbon double bonds in dental adhesive systems using HPLC and micro-Raman spectroscopy. J Dent 2008; 37:177-84. [PMID: 19108941 DOI: 10.1016/j.jdent.2008.11.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Revised: 11/08/2008] [Accepted: 11/12/2008] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES To quantify monomer elution from different adhesive systems using reverse-phase high-performance liquid chromatography (HPLC) and correlate this elution with the ratio of carbon-carbon double bonds from monomer to polymer (RDB) obtained using micro-Raman spectroscopy. METHODS Thirty dentine discs were cut from 30 human, intact, third molars and randomly allocated to five groups according to the adhesive applied: total-etch, Excite (Ivoclar Vivadent), two-bottle self-etch, Clearfil SE (Kuraray), one-bottle self-etch, Clearfil 3S (Kuraray), ormocer-based, Admira (Voco) and Filtek Silorane adhesive system (FS) (3M ESPE). Monomer elution was studied 1h, 6h, 24h, 96h and 7 days after immersion in 75% ethanol/water. The RDB was calculated immediately after light-curing and thereafter at 24h and 7 days. The data were statistically analysed using one-way ANOVA and Pearson's correlation coefficient (p<0.05). RESULTS More than 90% of the whole elution occurred during the first 1h, except for BisGMA in FS, with the highest absolute amount from Clearfil SE and the highest wt% from Admira. Initial RDB was in the ascending order FS<Admira<Excite<Clearfil SE<Clearfil 3S. In all groups, the RDB was significantly higher after 24h and 7 days than immediately after light-curing (p<0.05). Negative correlation was found only for the elution of HEMA and the RDB of Clearfil 3S. CONCLUSIONS Different adhesive systems showed different monomer elution kinetics. In all systems, the RDB increased after monomer elution. Overall, no direct correlation exists between the RDB of adhesives and the elution of unreacted monomers.
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Affiliation(s)
- Vesna Miletic
- Edinburgh Postgraduate Dental Institute, The University of Edinburgh, Lauriston Building (4th floor), Lauriston Place, Edinburgh EH3 9HA, United Kingdom.
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