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Saffarpour M, Abasalizadeh F, Fathollahi MS, Chiniforush N. The in vitro effect of antimicrobial photodynamic therapy with toluidine blue and indocyanine green on microleakage of class V cavities. Photodiagnosis Photodyn Ther 2022; 39:103005. [PMID: 35811053 DOI: 10.1016/j.pdpdt.2022.103005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/06/2022] [Accepted: 07/06/2022] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Considering the importance of disinfecting dentin and enamel after cavity preparation and the possible effect of disinfection methods on induction of various reactions in the tooth structure the aim of the present study was to evaluate microleakage of composite resin restoration after disinfecting the prepared dentin and enamel surface with antimicrobial photodynamic therapy (aPDT) with toluidine blue (TBO) and indocyanine green (ICG). MATERIALS AND METHODS Standard class V cavities were prepared on buccal surface of 71 human premolar teeth. The samples were randomly divided into 3 groups based on disinfection method: Group 1: conventional disinfection method with Phosphoric acid 37% as the control; Group 2: aPDT with TBO and diode laser with wavelength of 635 nm; Group 3: aPDT with ICG and diode laser with wavelength of 808 nm. All the cavities were restored with composite resin (3M™ Filtek™ Z250). After thermocycling and immersing in 0.5% basic fuchsin, the samples were prepared for microleakage evaluation under a stereomicroscope. Data was analyzed with Kruskal-Wallis and Wilcoxon signed-rank tests at P < 0.05. RESULTS There were no significant differences in the microleakage of occlusal and gingival margins between the TBO and control groups (P > 0.05). Also, the microleackage of occlusal margins between groups was not significantly different (P > 0.05) but microleackage of gingival margins of ICG group was lower than two other groups in a meaningful way (P < 0.05). CONCLUSION Photodynamic therapy with ICG as disinfecting agent in cavity preparations before composite resin restorations decreases the microleackage of gingival margins.
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Affiliation(s)
- Mahshid Saffarpour
- Department of Operative Dentistry, School of Dentistry, Alborz University of Medical Sciences, Karaj, Iran
| | | | - Mahmood Sheikh Fathollahi
- Rajaie Cardiovascular, Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Nasim Chiniforush
- Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Sayadizadeh M, Shojaeipour R, Poureslami H, Raeisi Estabragh S, Sharifi M. In vitro comparison of microleakage with two different techniques of placing stainless steel crowns on mandibular deciduous first molar teeth with decreased mesiodistal width. J Dent Res Dent Clin Dent Prospects 2022; 16:35-39. [PMID: 35936935 PMCID: PMC9339750 DOI: 10.34172/joddd.2022.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 01/03/2022] [Indexed: 11/09/2022] Open
Abstract
Background. Stainless steel crowns (SSCs) of the opposing maxillary deciduous molar teeth are used in mandibular deciduous first molars with decreased proximal surfaces due to caries. However, the SSCs of maxillary deciduous molar teeth are different from those of the mandibular deciduous molars in terms of the occlusal surface morphology, the buccal margin, and the proximal surface contour. Therefore, it is possible to prepare the buccal and lingual surfaces to use the SSC of the lower deciduous molar teeth and compare microleakage. Methods. Eighty extracted mandibular deciduous first molars were randomly assigned to two groups. In the case group (BLP), the buccal (B) and lingual (L) surfaces were prepared in addition to the proximal (P) surface, and an SSC was placed on the mandibular first deciduous teeth. Only the proximal surface was prepared in the control (P) group, and the SSC of the opposing tooth (maxillary deciduous first molar teeth) was placed. After dissecting the teeth, the extent of dye penetration was measured. Results. The difference in microleakage on the buccal aspect between the case and control groups was significant (P=0.02); however, the difference in microleakage on the lingual aspect between the case and control groups was not significant (P=0.89). Conclusion. Microleakage at the buccal margin of the SSC of mandibular deciduous first molars was less than the maxillary deciduous first molar SSC, with no significant differences in the lingual margin.
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Affiliation(s)
- Mahsa Sayadizadeh
- Department of Pediatric Dentistry and Oral and Dental Diseases Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Raziyeh Shojaeipour
- Department of Pediatric Dentistry and Oral and Dental Diseases Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Hamidreza Poureslami
- Department of Pediatric Dentistry, Dental School, Kerman University of Medical Sciences, Kerman, Iran
| | - Sajad Raeisi Estabragh
- Department of Prosthodontics and Oral and Dental Diseases Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Maryam Sharifi
- Department of Pediatric Dentistry, Dental School, Kerman University of Medical Sciences, Kerman, Iran
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In Vitro Evaluation of the Effect of Different Luting Cements and Tooth Preparation Angle on the Microleakage of Zirconia Crowns. Int J Dent 2021; 2021:8461579. [PMID: 34400912 PMCID: PMC8364426 DOI: 10.1155/2021/8461579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 07/10/2021] [Accepted: 07/29/2021] [Indexed: 11/29/2022] Open
Abstract
Introduction Discrepancy between the crown border and prepared tooth margin leads to a microleakage that eases the penetration of microorganisms and causes the dissolution of luting cement consequently. Several factors should be considered to achieve optimal fitness, including tooth preparation taper and type of cementing agent. The study aimed to determine the relation of tooth preparation taper and cement type on the microleakage of zirconia crowns. Materials and Methods Fifty-six freshly extracted premolars without caries and restorations were selected as the study sample and divided into two groups of different tapering degrees (6 and 12 degrees). Zirconia copings were designed and fabricated by the CAD/CAM system. The samples were divided into four subgroups for cementation, and each subgroup was cemented with a different luting cement (n = 7). After 5000 thermocycles at 5°C–55°C and dye penetration, the specimens were sectioned in the mid-buccolingual direction, and a digital photograph of each section was taken under a stereomicroscope. Data were analyzed by the Kruskal–Wallis and Mann–Whitney tests (α = 0.05). Results The results showed significant differences among the four types of luting cement in marginal permeability (PV < 0.001). Regardless of the type of cement, the 12-degree tapering resulted in a lower microleakage (46.4% without microleakage) with statistically significant differences from the 6-degree tapering (PV = 0.042). Conclusion Within the limitations of this study, increasing the tapering degree of the prepared tooth for CAD/CAM zirconia copings improved the marginal fit and decreased the microleakage score. In addition, total-etch resin cement indicated the least microleakage.
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Mansour FK, Ibrahim RM, Mansour H, Hamdy AM. Assessment of internal fit and micro leakage of conventionally fabricated ceramometallic restoration versus CAD wax and press veneering (in-vitro study). BDJ Open 2021; 7:17. [PMID: 33972501 PMCID: PMC8110796 DOI: 10.1038/s41405-021-00072-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/30/2021] [Accepted: 04/06/2021] [Indexed: 11/15/2022] Open
Abstract
Statement of problem Accuracy of internal fit and microleakage for CAD-CAM systems used in metal coping fabrication and veneered with layering or pressing porcelain in ceramometallic restoration is unclear. Material and methods A master metal die was milled to resemble the right mandibular first molar preparation for coverage with ceramometallic restoration. Master die was duplicated to twenty-four resin specimen dies.They were divided into two groups according to metal coping construction technique using either conventional (C) or CAD (D) wax. Each group was subdivided into two subgroups (n = 6) according to the technique of porcelain veneering (layered or pressed) to fabricate ceramometallic restorations, where subgroup (CL, DL) were conventionally layered by porcelain and (CP, DP) were press veneered. A standardized thickness of metal and porcelain was performed in all specimens as per manufacturer’s instructions for techniques ceramometallic restoration construction. Evaluation of internal fit was done with silicone replica technique using stereomicroscope at ×24 magnification where the thickness of silicon layer was measured at 20 reference points on each specimen. Then specimens were subjected to thermocycling. Sectioned specimens were assessed for microleakage using a stereomicroscope at ×12 magnification along die-cement interface with a five scale score. Results Mean internal gap values of veneering showed a statistically nonsignificant difference between specimens made with layering(L) and pressing(P). Different techniques of wax construction showed a non-significant difference in internal gap values between specimens made with conventional(C) and CAD(D) waxing. However, a significant difference was found in the internal gap at different sites. The highest internal gap was found at the occlusal surface, while the lowest gap was found at the finish line. The highest mean microleakage score was found with CAD wax and press veneering, while the lowest mean microleakage score was found with conventional wax and press veneering. Conclusion Both construction techniques of ceramometallic restoration were considered reliable in restoration production within a clinically acceptable range regarding internal fit and microleakage. There is a strong positive correlation between internal fit and microleakage of ceramometallic restoration constructed.
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Affiliation(s)
- Fatema Khaled Mansour
- Faculty of Oral and Dental Medicine, October University of Modern Sciences and Arts, Cairo, Egypt.
| | | | - Hoda Mansour
- University of Business and Technology, Jeddah, Saudi Arabia
| | - Ahmed Mohamed Hamdy
- Faculty of Oral and Dental Medicine, October University for Modern Sciences and Arts, Cairo, Egypt
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Sohrabi M, Ghadimi S, Seraj B. Comparison of Microleakage of Pedo Jacket Crowns and Stainless Steel Crowns Cemented with Different Cements. Front Dent 2019; 16:31-36. [PMID: 31608334 PMCID: PMC6778613 DOI: 10.18502/fid.v16i1.1106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 08/23/2018] [Indexed: 11/24/2022] Open
Abstract
Objectives This study aimed to assess the microleakage of Pedo Jacket crowns compared to stainless steel crowns (SSCs) cemented with different luting cements. Materials and Methods In this in-vitro experimental study, 80 primary molars were randomly divided into four groups of 20 each. Groups 1 and 2 were subjected to standard tooth preparation for SSC. Crowns in group 1 were cemented with glass ionomer (GI), and crowns in group 2 were cemented with a resin-modified glass ionomer (RMGI) cement. In groups 3 and 4, minimal tooth preparation was performed for Pedo Jacket crowns, and the crowns were cemented with RMGI and Panavia resin cement, respectively. Microleakage was measured at mesial and distal surfaces in micrometers (μm), and the mean value for each tooth was calculated. Oneway analysis of variance (ANOVA) was applied to compare the microleakage of the four groups. Results Group 3 (Pedo Jacket cemented with RMGI) showed the highest microleakage (1523.83±250.32 μm) with significant differences with the remaining three groups (P<0.001). Microleakage in group 4 (Pedo Jacket cemented with Panavia) was significantly lower than that in the other three groups (301.25±219.53 μm, P<0.001). Groups 1 (SSCs cemented with GI) and 2 (SSCs cemented with RMGI) were not significantly different in terms of microleakage (P=0.49) although group 1 showed slightly higher microleakage than group 2 (598.43±260.85 μm versus 500.25±124.74 μm). Conclusion Pedo Jacket crowns can serve as an acceptable esthetic alternative to SSCs if cemented with resin cements.
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Affiliation(s)
- Mona Sohrabi
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Ghadimi
- Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahman Seraj
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Biočanin V, Antonijević Đ, Poštić S, Ilić D, Vuković Z, Milić M, Fan Y, Li Z, Brković B, Đurić M. Marginal Gaps between 2 Calcium Silicate and Glass Ionomer Cements and Apical Root Dentin. J Endod 2018; 44:816-821. [DOI: 10.1016/j.joen.2017.09.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/20/2017] [Accepted: 09/28/2017] [Indexed: 11/27/2022]
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Cementation of Glass-Ceramic Posterior Restorations: A Systematic Review. BIOMED RESEARCH INTERNATIONAL 2015; 2015:148954. [PMID: 26557651 PMCID: PMC4628770 DOI: 10.1155/2015/148954] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 07/23/2015] [Accepted: 08/05/2015] [Indexed: 11/17/2022]
Abstract
Aim. The aim of this comprehensive review is to systematically
organize the current knowledge regarding the cementation of glass-ceramic
materials and restorations, with an additional focus on the benefits of Immediate
Dentin Sealing (IDS). Materials and Methods. An extensive literature
search concerning the cementation of single-unit glass-ceramic posterior restorations
was conducted in the databases of MEDLINE (Pubmed), CENTRAL (Cochrane Central
Register of Controlled Trials), and EMBASE. To be considered for inclusion,
in vitro and in vivo studies should compare different
cementation regimes involving a “glass-ceramic/cement/human tooth” complex.
Results and Conclusions. 88 studies were included in total.
The in vitro data were organized according to the following topics:
(micro)shear and (micro)tensile bond strength, fracture strength, and marginal gap
and integrity. For in vivo studies survival and quality of survival
were considered. In vitro studies showed that adhesive systems
(3-step, etch-and-rinse) result in the best (micro)shear bond strength values compared
to self-adhesive and self-etch systems when luting glass-ceramic substrates
to human dentin. The highest fracture strength is obtained with adhesive cements
in particular. No marked clinical preference for one specific procedure could be
demonstrated on the basis of the reviewed literature. The possible merits of IDS
are most convincingly illustrated by the favorable microtensile bond strengths.
No clinical studies regarding IDS were found.
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Evaluation of subgingival microflora in all ceramic restorations with subgingival heavy chamfer finish lines. J Indian Prosthodont Soc 2014; 13:19-23. [PMID: 24431702 DOI: 10.1007/s13191-012-0165-2] [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: 04/15/2011] [Accepted: 07/19/2012] [Indexed: 10/28/2022] Open
Abstract
Microbial colonization in the gingival sulci of abutment teeth receiving all ceramic retainers with subgingival margins need to be studied to assess the prognosis of periodontal health, which determine the eventual success of fixed partial dentures. This prospective observational study was done to evaluate the quantitative alteration in the microbial flora in the gingival sulci of abutment teeth adjacent to the edentulous space prior and after receiving all ceramic retainers over varying time intervals of 1 week, 1 month and 2 months respectively. Twenty, healthy partially edentulous patients, aged 20-50 years with single missing central incisor were selected for this prospective observational study and their microbial samples were collected from the gingival sulci of abutments adjacent to edentulous space with sterile paper points and cultured and the estimated values for microflora served as controls. The same abutments were prepared to receive all ceramic retainers with subgingival heavy chamfer marginal finish lines. The patients were recalled after 1 week, 1 month, 2 months intervals during which the collected subgingival microbial samples were cultured and the corresponding quantitative microbial alteration in the restored gingival sulci was recorded. The obtained data was statistically analysed using the student t test and repeated analysis of variance test. The results of the study inferred student t test expressed a statistically significant (p < 0.001) progressive increase in gingival sulcular microbial colonisation in the abutment teeth before [M = 2.52 ± SD 1.21(10(6)) CFU/ml] and after receiving all ceramic retainers over varying time intervals of 1 week [M = 3.25 ± SD 1.21(10(6)) CFU/ml], 1 month [M = 4.64 ± SD 1.13(10(6)) CFU/ml] and 2 months [M = 4.75 ± SD 1.16(10(6)) CFU/ml] respectively. The result of repeated analysis of variance test inferred that there was a statistically significant difference (p < 0.001) in the subgingival microfloral count between the pre operative and post operative samples at 1 week, 1 month and 2 months. Subgingivally placed all-ceramic retainers with heavy chamfer finish lines in the abutment teeth demonstrated a statistically significant increase in sulcular microbial colonization over varying time intervals of 1 week, 1 month and 2 months respectively and this may affect periodontal health of abutment teeth progressively.
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Sambrook RJ, Judge RB. The cross-pin retained implant supported restoration: a study of gasket placement and leakage. Aust Dent J 2012. [PMID: 23186564 DOI: 10.1111/j.1834-7819.2012.01730.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Advantages of cross-pin retained implant supported restorations (ISRs) include predictable retrieval and predictable retention. Unlike direct to fixture (DTF) or cement retained restorations, the prosthetic design of a cross-pinned restoration retains gaps at the interfaces between the crown, abutment and cross-pin screw. These spaces permit leakage into the suprastructure and gasket placement has been recommended to prevent this leakage. METHODS Five different gaskets were assessed for their ability to prevent leakage into a cross-pinned ISR. The gaskets tested were: cement admixture on the cross-pin screw; cement admixture on the inner surface of the coping and the cross-pin screw; cement admixture on the inner surface of the coping only; cement admixture placed 1 mm from the margin of the coping and a filler placed in the abutment chimney. results: Only gaskets which sealed both the cross-pin screw interface and the abutment-crown interface prevented leakage. A filler placed in the abutment chimney prevented leakage into this space but did not prevent fluid accumulating between the coping and abutment. Conservative placement of cement at the margin of the coping failed to prevent leakage. CONCLUSIONS Cement gaskets may effectively prevent leakage into a cross-pinned ISR. However, the use of a cement as a gasket has to be weighed against the issue of predictable retrieval, cement extrusion and incomplete seating.
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Affiliation(s)
- R J Sambrook
- Melbourne Dental School, The University of Melbourne, Victoria, Australia.
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