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Effect of Different Desensitizers on Shear Bond Strength of Self-Adhesive Resin Cements to Dentin. Bioengineering (Basel) 2022; 9:bioengineering9080372. [PMID: 36004897 PMCID: PMC9405332 DOI: 10.3390/bioengineering9080372] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/01/2022] [Accepted: 08/04/2022] [Indexed: 11/29/2022] Open
Abstract
The sealing and bonding characteristics of luting cements may be affected by the application of desensitizers containing ingredients that induce chemical interaction with dentin organic matrix. This study evaluated the effect of different desensitizers on the immediate and long-term shear bond strength (SBS) of a self-adhesive resin cement (SARC) to dentin. Healthy bovine dentin specimens were used for the study. Gluma® Desensitizer, Desensibilize Nano P®, and Soothe® desensitizer were used in study groups, while the control group did not receive any treatment. Next, SARC (RelyXTM U200) in cylindrical mold was applied to the sample surface. All specimens were stored at 37 °C for 24 h or six months and tested for SBS. Additionally, water contact angle was measured using an optical tensiometer. Results were analyzed by analysis of variance and Student-t tests (p ˂ 0.05). Application of the different types of desensitizers had no significant influence on immediate or long-term SBS of SARC to dentin (p > 0.05). Differences for water contact angle were not statistically significant among the tested groups (p = 0.450). Within the limitations of the present study, it can be concluded that the application of the different types of desensitizers had no significant influence on the SBS of a SARC to dentin.
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Al-Chalabi AS, Taher R, Chakmakchi M. The Effect of Desensitizing Agent on Shear Bond Strength to Dentin using Three Self-etching Bonding Systems at Different Time Intervals. An In Vitro Study. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.9542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Objectives: To investigate the shear bond strength of dentin surfaces using different self-etching bonding systems after treating with a desensitizing agent at different time intervals.
Materials and methods: 63 sound upper premolars were used, the occlusal aspect was sectioned at the middle in a vertical direction into buccal and palatal halves. Each specimen was mounted and a flat dentin surface was prepared at the middle third of each specimen. The sectioned samples were divided into 3 groups according to the bonding agent n=42. One-half of each tooth was treated with desensitizing agent Quadrant FiniSense then both halves were bonded with one of the three self-etching bonding systems (G-Premio bonding, i Bond, Clearfil S3 bound plus). After adhesive procedures, a composite resin was applied against the tooth to form a cylinder (2mm×4mm) and cured. From each group 14 specimens were stored in distilled water at 37° C for 24 hours, 7 days, and 72 days. At the end of each interval, the samples were tested for the shear bond strength using a universal testing machine (Instron). Data were analyzed using the Independent t-test and One Way ANOVA Test and Duncan’s Multiple Range Test.
Results: All bonding systems showed lower bonding strength when samples were treated with desensitizer with a significant difference at all time intervals except for the i bond group which showed no significant difference in bond strength at a period of 7 and 72 days in treated and without desensitizer treated samples.
Conclusion: Obliteration of dentinal by dentin desensitizer may have a negative effect on the bonding strength of the self-etching bonding systems.
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Okur E, Eyüboğlu GB. Evaluation of Dentin Tubule Plugging Efficiencies and Effects on Dentin Surface Roughness of Dentin Desensitizing Agents, the Er,Cr:YSGG Laser, and Their Combination After Erosion-Abrasion Cycles: An In Vitro Study. Oper Dent 2022; 47:E35-E51. [PMID: 35289911 DOI: 10.2341/21-086-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVES The purposes of this in vitro study were to evaluate the tubule plugging efficiencies and effects on the surface roughness of dentin of different dentin desensitizing agents (DDAs; Teethmate Desensitizer, Kuraray; Gluma Desensitizer, Kulzer; Clinpro White Varnish, 3M ESPE; Enamelast, Ultradent) and the Er,Cr:YSGG laser (Biolase, Waterlase), both alone and in combination with DDAs, after application and after an erosion-abrasion cycle. METHODS AND MATERIALS For surface roughness examinations, superficial buccal dentin specimens were divided into 10 groups: the control, Teethmate Desensitizer, Gluma Desensitizer, Enamelast, Clipro White Varnish, Er,Cr:YSGG Laser, Teethmate Desensitizer-Laser, Gluma Desensitizer-Laser, and Enamelast-Laser, and Clinpro White Varnish-Laser groups. Profilometric analyses and scanning electron microscopy (SEM) examinations were performed after applications and after a 5-day erosive-abrasive cycle. For the statistical analysis of surface roughness measurements, 2-way analysis of variance (ANOVA), 1-way ANOVA, and Tukey post hoc test were used. RESULTS Among the treatments, only DDAs alone did not cause increase in surface roughness after application. All of the laser applications increased the surface roughness of dentin, and after the erosion-abrasion cycle, all of the test groups had increased surface roughness. However, SEM images showed that morphological changes were less frequently observed in all of the experimental groups than in the control group. In addition, all of the laser-DDA combinations had stronger tubule occlusion effects than did DDAs alone, even after erosion-abrasion. CONCLUSIONS All of the test treatments showed protective effects on dentin surfaces against the negative effects of erosion-abrasion. The addition of the laser to DDA applications increased tubular plugging efficiencies of DDAs, and the tubule plugs of the combination treatments were resistant to the erosion-abrasion cycle.
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Affiliation(s)
- E Okur
- Esmahan Okur, Dr Dt, Department of Restorative Dentistry, School of Dentistry, Karadeniz Technical University, Ortahisar/Trabzon, Turkey
| | - G B Eyüboğlu
- *Güneş Bulut Eyüboğlu, DDS, PhD, Department of Restorative Dentistry, School of Dentistry, Karadeniz Technical University, Ortahisar/Trabzon, Turkey
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Uğur M, Kavut I, Külünk Ş, Akdeniz MŞ, Tanrıkut ÖO. Effects of Desensitizers, Temporary Cements, and Dentin Cleaning Methods on the Bond Strength of Self-Etch/ Adhesive Resin Cements to Dentin: An In Vitro Study. JOURNAL OF ADVANCED ORAL RESEARCH 2021. [DOI: 10.1177/23202068211052796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aim: The aim of this study was to evaluate the effect of desensitizer, temporary cements, dentin cleaning methods on shear bond strength (SBS) of self-etch and self-adhesive resin cements to dentin. Materials and Methods: Four hundred eighty buccal or lingual/palatine coronal portions of human molar teeth were mounted in the acrylic blocks. Teeth surfaces were prepared until the dentin was exposed. Specimens were divided into four groups. One group separated as control and three groups of teeth were treated with a desensitizing agent containing calcium-phosphate desensitizer (Teethmate Desensitizer, TMD), resin-based self-reinforcing monomer (Shield Force Plus, SFP) and 2-hydroxyethyl methacrylate and glutaraldehyde (Gluma Desensitizer). Two different temporary cement containing calcium hydroxide (Dycall) and zinc oxide based (Rely X Temp NE) temporary cement were applied to the dentin surfaces. Temporary cement was removed with one of three cleansing techniques: 2% chlorhexidine digluconate and glass particles containing agent (Consepsis Scrub), cleansing bur (OptiClean), and ıntra/extracoronal rotary brush (Starbrush). All groups were further divided into two cementation subgroups (Panavia V5 and Panavia SA). The SBS (MPa) was measured using a universal testing machine at 0.5 mm/min crosshead speed. The data were analyzed statistically with a four-way analysis of variance and Tukey’s Honest Significant Difference test ( α = 0.05). Results: Although SFP showed higher SBS, there was no statistically significant difference between other groups ( P > .05). There were no significant differences between temporary cements ( P > .05). OptiClean rotary bur showed higher mean SBS values in all groups. The dual-polymerized Panavia V5 showed the highest SBS values in all groups ( P <.05). Conclusion: Cleaning of dentin surface from temporary cement remnants with a silicon bur and dual-cure resin cement showed the highest bond strength values.
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Affiliation(s)
- Mehmet Uğur
- Department of Prosthodontics, Van Yüzüncü Yıl University, Faculty of Dentistry, Van, Turkey
| | - I˙dris Kavut
- Department of Prosthodontics, Van Yüzüncü Yıl University, Faculty of Dentistry, Van, Turkey
| | - Şafak Külünk
- Department of Prosthodontics, On Dokuz Mayıs University, Faculty of Dentistry, Samsun, Turkey
| | - Mehmet Şerif Akdeniz
- Department of Prosthodontics, Bingöl University, Faculty of Dentistry, Bingöl, Turkey
| | - Özgür Ozan Tanrıkut
- Department of Prosthodontics, Van Yüzüncü Yıl University, Faculty of Dentistry, Van, Turkey
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Kavut İ, Uğur M. The Effect of Dentin Treated with Calcium Phosphate Desensitizer on Shear Bond Strength with Different Resin Cement: An In Vitro Study. JOURNAL OF ADVANCED ORAL RESEARCH 2021. [DOI: 10.1177/23202068211050204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Aim: The aim of this study was to evaluate the effect of calcium phosphate based desensitizing agent on shear bond strength of self-etch/adhesive resin cements to dentin. Materials and Methods: Eighty dentin specimens were prepared from freshly extracted human third molar teeth and were classified, randomly ( n = 20). Half of groups were treated with calcium phosphate based Teethmate Desensitizer and then Panavia V5, RelyX Ultimate (containing self-etch primer), Panavia SA, and RelyX U200 self-adhesive resin cements were luted to all dentin surfaces. All specimens were stored in an incubator at 37°C for 24 h. Shear bond strength was tested by a universal test machine at a 0.5 mm/min crosshead speed. The data were analyzed with a statistical program. Two-way ANOVA was used for statistical differences ( P <.05). Dentin surfaces were examined with scanning electron microscopy (SEM) at x5000 and x10000 magnifications. Results: The higher shear bond values were observed in the groups with Teethmate Desensitizer applied and cemented with self-etch (16.05 ± 6.24 and 14.73 ± 4.75), whereas the lowest bonding values were observed in the groups with self-adhesive resin cement without Teethmate Desensitizer (3.73 ± 0.77 and 5.85 ± 4.19; P <.001). As the main effect of the treatment, the bond strength was 9.39 ± 6.04 in the control group, whereas it was 13.49 ± 5.44 in the Teethmate applied groups ( P <.05) Conclusions: Calcium phosphate desensitizer did not adversely effected shear bond strength of self-etch/adhesive resin cements to dentin. It even significantly increased the shear bond strength of self-adhesive resin cements.
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Affiliation(s)
- İdris Kavut
- Department of Prosthodontics, Faculty of Dentistry, Van Yüzüncü Yıl University, Van, Turkey
| | - Mehmet Uğur
- Department of Prosthodontics, Faculty of Dentistry, Van Yüzüncü Yıl University, Van, Turkey
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Batzorig B, Nakano K, Murata K, Maesako M, Inoue K, Kishimoto T, Tomoda S, Maeda H, Horie T, Fujitani M. Effects of Various Desensitizing Agents on the Microtensile Bond Strength of a Hypersensitive Dentin Model Produced <i>in vitro</i> Using a One-step Self-etch System. J HARD TISSUE BIOL 2021. [DOI: 10.2485/jhtb.30.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Bayarmaa Batzorig
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Kenjiro Nakano
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Kosei Murata
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Mayumi Maesako
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Kazuho Inoue
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Takafumi Kishimoto
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Shigetaka Tomoda
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Hatsuhiko Maeda
- Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
| | - Taku Horie
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
| | - Morioki Fujitani
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University
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Obayashi S, Hamba H, Nakamura K, Nikaido T, Tagami J. Preventive effect of experimental polymer-based desensitizers with NaF on demineralization of root dentin -observed using micro-CT. Dent Mater J 2020; 39:1050-1056. [PMID: 32684611 DOI: 10.4012/dmj.2019-331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study compared the effect of experimental polymer-based desensitizers with NaF and oxalic acid (OA) for preventing root demineralization via observation using micro-CT. Bovine root dentin surfaces were treated with coating materials: no treatment; MS0(+) (MS Coat One®); MS3000(+) (MS Coat®); MS0(-); MS3000(-); MS7000(+/-); fluoride gel (NaF9000). MS; MS polymer, 0-7000; NaF concentrations, (+/-); OA. The specimens were scanned using micro-CT before and after demineralization (pH4.5, 10 h). Following this, the mean mineral loss (ML) after demineralization was calculated, and the specimens were observed under a scanning electron microscope (SEM). The ML values of MS3000(+), MS7000(-), MS7000(+) and NaF9000 were significantly lower than the other groups (p<0.05). Under an SEM, a membrane structure was observed to have formed on the dentin surface in the presence of the MS, fluoride, and OA. The experimental polymer-based desensitizer with oxalic acid and a high concentration of fluoride is effective for preventing root demineralization.
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Affiliation(s)
- Sho Obayashi
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Hidenori Hamba
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College
| | - Keiki Nakamura
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College
| | - Toru Nikaido
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Abstract
Successful adhesive dentistry begins with correct placement and polymerization of the bonding agent. Although numerous agents exist, all abide by certain key principles, including the newest group, the universal adhesives. Fundamental steps also exist in the application process that require the operator to understand the chemistry of the adhesive being used. Modalities exist that can help preserve the durability of the bond achieved, thus slowing down the degradation process. However, no material or agent can overcome poor technique. Thus, it is of the utmost importance that the practitioner respects the technique sensitivity of adhesives, and follows the manufacturer's instructions.
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Affiliation(s)
- Marc Hayashi
- UCLA School of Dentistry, 10833 Le Conte Ave, Box 951668, Los Angeles, CA 90095, USA.
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Priya CHL, Naik S, Kumar NK, Merwade S, Brigit B, Prabakaran P. Evaluation of the bond strength of posterior composites to the dentin, treated with four different desensitizing agents – An In vitro study. JOURNAL OF THE INTERNATIONAL CLINICAL DENTAL RESEARCH ORGANIZATION 2020. [DOI: 10.4103/jicdro.jicdro_55_19] [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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10
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Sarı F, Şahin O, Özdemir AK. Effect of dentin desensitizers and Nd:YAG laser pre-treatment on microshear bond strength of adhesive resin cement to dentin. CUMHURIYET DENTAL JOURNAL 2019. [DOI: 10.7126/cumudj.537953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Pilo R, Agar-Zoizner S, Gelbard S, Levartovsky S. The Retentive Strength of Laser-Sintered Cobalt-Chromium-Based Crowns after Pretreatment with a Desensitizing Paste Containing 8% Arginine and Calcium Carbonate. Int J Mol Sci 2018; 19:ijms19124082. [PMID: 30562955 PMCID: PMC6321158 DOI: 10.3390/ijms19124082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/01/2018] [Accepted: 12/13/2018] [Indexed: 11/16/2022] Open
Abstract
The retention of laser-sintered cobalt-chromium (Co-Cr)-based crowns were examined after dentin pretreatment with desensitizing paste containing 8% arginine and calcium carbonate (DP-ACC). Forty lower first molars were prepared using a standardized protocol. The Co-Cr crowns were produced using selective laser melting. The teeth were either pretreated with the desensitizing paste or not pretreated. After one week, each group was cemented with glass ionomer cement (GIC) or zinc phosphate cement (ZPC). Surface areas of the teeth were measured before cementation. After aging, a universal testing machine was used to test the retentive strength of the cemented crown-tooth assemblies. The debonded surfaces of the teeth and crowns were examined at 2.7× magnification. Pretreating the dentin surfaces with the desensitizing paste before cementation with GIC or ZPC did not affect the retention of the Co-Cr crowns. The retention of the GIC group (6.04 ± 1.10 MPa) was significantly higher than that of the ZPC group (2.75 ± 1.25 MPa). The predominant failure mode for the ZPC and the nontreated GIC group was adhesive cement-dentin failure; for the treated GIC group, it was adhesive cement-crown failure. The desensitizing paste can be safely used to reduce post-cementation sensitivity without reducing the retentive strength of Co-Cr crowns cemented with GIC or ZPC.
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Affiliation(s)
- Raphael Pilo
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel- Aviv University, Tel -Aviv 6997801, Israel.
| | - Sharon Agar-Zoizner
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel- Aviv University, Tel -Aviv 6997801, Israel.
| | - Shaul Gelbard
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel- Aviv University, Tel -Aviv 6997801, Israel.
| | - Shifra Levartovsky
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel- Aviv University, Tel -Aviv 6997801, Israel.
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Yilmaz NA, Ertas E, Orucoğlu H. Evaluation of Five Different Desensitizers: A Comparative Dentin Permeability and SEM Investigation In Vitro. Open Dent J 2017; 11:15-33. [PMID: 28484578 PMCID: PMC5396078 DOI: 10.2174/1874210601711010015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 11/28/2016] [Accepted: 01/03/2017] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND/OBJECTIVE The purpose of this study was to evaluate the efficacy and durability of five different dentin desensitizers (Gluma Desensitizer Powergel, Bifluorid 12, Gluma Self Etch Bond, D/Sense Crystal, Nupro Sensodyne Prophylaxis Paste with Novamin) on tubule occlusion and dentin permeability reduction in vitro. METHOD The quantitative changes in permeability of 100 dentin discs were measured after desensitizer treatments and following post-treatments of 6% citric acid challenge for 1 min or immersion in artificial saliva for 24 hours under hydrostatic pressure generated by a computerised fluid filtration meter. Qualitative SEM analyses were also carried out. RESULTS Dentin permeability decreased after desensitizer application in all groups. Nevertheless, only the difference between 'Gluma Self Etch Bond' and 'Nupro Sensodyne Prophylaxis Paste with Novamin' groups was significantly different (p<0.05). Dentin permeability increased significantly after post-treatments (p<0.05). There was no statistically difference among the citric acid-subgroups (p>0.05). Of all the artificial saliva-subgroups, only the difference between 'D/Sense Crystal' and 'Bifluorid 12' was significantly different (p<0.05). In SEM analysis, morphological changes were detected on the dentin surface and within the tubules following desensitizer treatments and post-treatments. CONCLUSION All the desensitizers significantly reduced dentin permeability by changing the morphology of the dentin surface and/or dentinal tubules. Following post-treatments, there was some reduction in the efficacy of the desensitizers which was represented by the reduction in permeability values. SEM analysis revealed some physical changes in the dentin structure which can partly give an explanation to the reduced efficacy of tested desensitizers.
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Affiliation(s)
- Nasibe Aycan Yilmaz
- Department of Restorative Dentistry, Faculty of Dentistry,
University of Adnan Menderes, Aydin, Turkey
| | - Ertan Ertas
- Department of Restorative Dentistry, Faculty of Dentistry,
University of Ondokuz Mayis, Samsun, Turkey
| | - Hasan Orucoğlu
- Department of Endodontics, Faculty of Dentistry, University of
Abant Izzet Baysal, Bolu, Turkey
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Lawaf S, Jalalian E, Roshan R, Azizi A. Effect of GLUMA desensitizer on the retention of full metal crowns cemented with Rely X U200 self-adhesive cement. J Adv Prosthodont 2016; 8:404-410. [PMID: 27826391 PMCID: PMC5099133 DOI: 10.4047/jap.2016.8.5.404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 07/20/2016] [Accepted: 08/08/2016] [Indexed: 12/02/2022] Open
Abstract
PURPOSE Considering the importance of retention in the success and long-term clinical service of fixed partial dentures (FPDs) as well as the existing controversy regarding the effect of GLUMA desensitizer on the retention of full metal crowns cemented with RelyX U200 self-adhesive cement, this study aimed to assess the effect of GLUMA desensitizer on the retention of full metal crowns cemented using RelyX U200. MATERIALS AND METHODS In this experimental study, 20 sound human premolars were prepared; a 0.5 mm chamfer finish line was prepared above the cementoenamel junction. The teeth were randomly assigned to two groups: a desensitizer group (n = 10, treated with GLUMA desensitizer) and a control (n = 10, no surface treatment). Full metal crowns were fabricated of base metal alloy and had a ring. All crowns were cemented with RelyX U200 and subjected to retention test by using a universal testing machine. The data were analyzed using SPSS version 20 and independent t-test. RESULTS The mean tensile bond strength was significantly higher in the GLUMA desensitizer group (230.63 ± 63.8 N) compared to the control group (164.45 ± 39.3 N) (P≤.012). CONCLUSION GLUMA desensitizer increases the tensile bond strength of RelyX U200 self-adhesive cement to dentin.
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Affiliation(s)
- Shirin Lawaf
- Prosthodontics Department. Islamic Azad University-Dental Branch, Teheran, Iran
| | - Ezatallah Jalalian
- Prosthodontics Department. Islamic Azad University-Dental Branch, Teheran, Iran
| | - Roshanak Roshan
- Prosthodontics Department. Islamic Azad University-Dental Branch, Teheran, Iran
| | - Arash Azizi
- Oral Medicine Department. Islamic Azad University-Dental Branch, Teheran, Iran
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Su TS, Sun J. Comparison of marginal and internal fit of 3-unit ceramic fixed dental prostheses made with either a conventional or digital impression. J Prosthet Dent 2016; 116:362-7. [PMID: 27061628 DOI: 10.1016/j.prosdent.2016.01.018] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 01/07/2016] [Accepted: 01/07/2016] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM For 20 years, the intraoral digital impression technique has been applied to the fabrication of computer aided design and computer aided manufacturing (CAD-CAM) fixed dental prostheses (FDPs). Clinical fit is one of the main determinants of the success of an FDP. Studies of the clinical fit of 3-unit ceramic FDPs made by means of a conventional impression versus a digital impression technology are limited. PURPOSE The purpose of this in vitro study was to evaluate and compare the internal fit and marginal fit of CAD-CAM, 3-unit ceramic FDP frameworks fabricated from an intraoral digital impression and a conventional impression. MATERIAL AND METHODS A standard model was designed for a prepared maxillary left canine and second premolar and missing first premolar. The model was scanned with an intraoral digital scanner, exporting stereolithography (STL) files as the experimental group (digital group). The model was used to fabricate 10 stone casts that were scanned with an extraoral scanner, exporting STL files to a computer connected to the scanner as the control group (conventional group). The STL files were used to produce zirconia FDP frameworks with CAD-CAM. These frameworks were seated on the standard model and evaluated for marginal and internal fit. Each framework was segmented into 4 sections per abutment teeth, resulting in 8 sections per framework, and was observed using optical microscopy with ×50 magnification. Four measurement points were selected on each section as marginal discrepancy (P1), mid-axial wall (P2), axio-occusal edge (P3), and central-occlusal point (P4). RESULTS Mean marginal fit values of the digital group (64 ±16 μm) were significantly smaller than those of the conventional group (76 ±18 μm) (P<.05). The mean internal fit values of the digital group (111 ±34 μm) were significantly smaller than those of the conventional group (132 ±44 μm) (P<.05). CONCLUSIONS CAD-CAM 3-unit zirconia FDP frameworks fabricated from intraoral digital and conventional impressions showed clinically acceptable marginal and internal fit. The marginal and internal fit of frameworks fabricated from the intraoral digital impression system were better than those fabricated from conventional impressions.
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Affiliation(s)
- Ting-Shu Su
- Resident, Department of Prosthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China
| | - Jian Sun
- Professor, Department of Prosthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, China.
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Chiang YS, Chen YL, Chuang SF, Wu CM, Wei PJ, Han CF, Lin JC, Chang HT. Riboflavin-ultraviolet-A-induced collagen cross-linking treatments in improving dentin bonding. Dent Mater 2013; 29:682-92. [PMID: 23582694 DOI: 10.1016/j.dental.2013.03.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 10/15/2012] [Accepted: 03/14/2013] [Indexed: 11/17/2022]
Abstract
OBJECTIVES To evaluate the collagen cross-linkers, riboflavin-ultraviolet-A (RF/UVA) and glutaraldehyde, with regard to their efficacy in cross-linking the dentinal collagen and improving dentin bonding. METHODS Glutaraldehyde and different RF/UVA protocols (0.1%RF/1-minUV, 0.1%RF/2-minUV, and 1%RF/1-minUV) were first evaluated by gel electrophoresis to determine their abilities of collagen cross-linking. The mechanical properties of acid-etched dentin receiving these cross-linking treatments were examined in either dry or wet condition by a nanoindentation test. Fifteen teeth with exposed occlusal dentin received the microtensile bond strength (μTBS) test. The teeth were primed either with RF/UVA or glutaraldehyde, followed by adhesive treatment and composite restorations, and then cut into resin-dentin microbeams. Half of the microbeams received the μTBS test after 24h, and the other half received test after 5000 thermocycles. Nanoleakage at the bond interface was examined under TEM. The alignments of collagen fibrils in the hybrid layers were also defined by an image analysis. RESULTS Gel electrophoresis showed that glutaraldehyde induced strong collagen gelation, while RF/UVA generated milder collagen cross-linking. Glutaraldehyde, 0.1%RF/2-min-UVA, and 1%RF/1-minUV showed higher stiffness compared to untreated and 0.1%RF/1-minUV in wet condition. All the crosslinking treatments improved early μTBS, but 0.1%RF/2-minUVA treatment maintained high μTBS after theromocycles. Under TEM, glutaraldehyde-treated dentin showed dense and enclosed collagen network on the adhesive interface. 0.1%RF/2-minUVA showed the least nanoleakage, and this could be associated with the suspended collagen fibrils in the hybrid layer. SIGNIFICANCE 0.1%RF/2-minUVA treatment enhanced resin-dentin bond possibly through enhancing the stiffness and maintaining the expanding collagen matrix in the hybrid layer.
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Affiliation(s)
- Yung-Show Chiang
- Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan
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16
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Pei D, Liu S, Huang C, Du X, Yang H, Wang Y, Deng D. Effect of pretreatment with calcium-containing desensitizer on the dentine bonding of mild self-etch adhesives. Eur J Oral Sci 2013; 121:204-10. [PMID: 23659244 DOI: 10.1111/eos.12047] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2013] [Indexed: 10/27/2022]
Affiliation(s)
- Dandan Pei
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School & Hospital of Stomatology; Wuhan University; Wuhan China
- Department of Prosthodontics; Stomatological Hospital; College of Medicine; Xi'an Jiaotong University; Xi'an Shaanxi China
| | - Siying Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School & Hospital of Stomatology; Wuhan University; Wuhan China
| | - Cui Huang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School & Hospital of Stomatology; Wuhan University; Wuhan China
- Department of Prosthodontics; School of Stomatology; Wuhan University; Wuhan China
| | - Xijin Du
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School & Hospital of Stomatology; Wuhan University; Wuhan China
| | - Hongye Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School & Hospital of Stomatology; Wuhan University; Wuhan China
| | - Yake Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School & Hospital of Stomatology; Wuhan University; Wuhan China
| | - Donglai Deng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School & Hospital of Stomatology; Wuhan University; Wuhan China
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Shafiei F, Alavi AA, Karimi F, Ansarifard E. Effects of Oxalate Desensitizer with Different Resin Cement-Retained Indirect Composite Inlays on Fracture Resistance of Teeth. J Prosthodont 2012; 22:268-74. [DOI: 10.1111/j.1532-849x.2012.00947.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2012] [Indexed: 11/30/2022] Open
Affiliation(s)
- Fereshteh Shafiei
- Assosciate Professor, Department of Operative Dentistry, School of Dentistry; Shiraz University of Medical Sciences; Iran
| | - Ali Asghar Alavi
- Professor, Biomaterials Research Center, Department of Operative Dentistry; School of Dentistry, Shiraz University of Medical Sciences; Iran
| | - Fatemeh Karimi
- Postgraduate Student, Department of Operative Dentistry, School of Dentistry; Shiraz University of Medical Sciences; Iran
| | - Elham Ansarifard
- Postgraduate Student, Department of Prosthodontics, School of Dentistry; Shiraz University of Medical Sciences; Iran
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Akatsuka R, Ishihata H, Noji M, Matsumura K, Kuriyagawa T, Sasaki K. Effect of hydroxyapatite film formed by powder jet deposition on dentin permeability. Eur J Oral Sci 2012; 120:558-62. [PMID: 23167474 DOI: 10.1111/j.1600-0722.2012.01003.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2012] [Indexed: 12/01/2022]
Abstract
A powder jet deposition (PJD) process can be used to create a thick hydroxyapatite (HA) film on the surface of a human tooth. This study aimed to investigate in vitro the ability of an HA film, applied using PJD, to diminish dentin permeability. Discs of human coronal dentin were cut perpendicular to the tooth axis and the smear layer was removed by EDTA treatment. The HA film was created by accelerating HA particles, calcinated at 1200°C, onto the dentin discs at room temperature and atmospheric pressure. The surfaces and cross-sections of the HA PJD-treated samples were observed using scanning electron microscopy. Their permeability was indirectly recorded with a split-chamber device utilizing a chemiluminescence technique. MS-coat, a commercial dentin-desensitizing agent, was also evaluated for its effect on reducing liquid flow through the dentin. The scanning electron microscopy images showed that the HA particles were successfully deposited onto the dentin and solidly into the dentin tubules. The permeability of dentin after application of the HA films was significantly lower than that following application of MS-coat. This study showed the potential clinical application of PJD techniques in desensitizing dentin hypersensitivity.
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Affiliation(s)
- Ryo Akatsuka
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.
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19
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Effect of oxalate desensitizer on the bonding durability of adhesive resin cements to dentin. J Prosthodont Res 2012; 56:187-93. [PMID: 22264675 DOI: 10.1016/j.jpor.2011.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 10/13/2011] [Accepted: 11/21/2011] [Indexed: 11/22/2022]
Abstract
PURPOSE This study investigated whether the tubular occluding effect of oxalate desensitizer (OX) during adhesive cementation improved bonding of a self-etch and two etch-and-rinse resin cements to dentin after 6 months. METHODS A flat dentin surface was prepared on 120 extracted premolars, which were randomly divided into six groups of 20 teeth each according to the adhesive resin cement system used: ED primer II/Panavia F2.0, Excite DSC (Ex DSC)/Variolink II, and One-Step Plus (OS Plus)/Duolink, with or without OX (BisBlock) application. After cementation of an indirect composite rod, two subgroups (n=10) were tested after 24 h and 6 months of water storage plus thermocycling, and shear bond strengths were recorded in MPa. RESULTS Statistical tests showed that although oxalate had a borderline significant negative effect on initial bonding of ED primer II/Panavia F2.0, it significantly improved bonding durability (p<0.05). OX severely compromised the initial bond strength of Ex DSC/Variolink II (p<0.001) but had no effect on the reduction in bonding after aging. OX was compatible with OS Plus/Duolink and did not affect the loss of bonding strength after 6 months (p>0.05). CONCLUSION Combining an oxalate desensitizer with three types of resin cements had different effects on bond strength to dentin after aging, depending on the interaction of oxalate with the adhesive system associated to the resin cement.
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PASHLEY DAVIDH. COMMENTARY. The Effects of Different Desensitizing Agents on the Shear Bond Strength of Adhesive Resin Cement to Dentin. J ESTHET RESTOR DENT 2011; 23:388-9. [DOI: 10.1111/j.1708-8240.2011.00416.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Stawarczyk B, Hartmann R, Hartmann L, Roos M, Ozcan M, Sailer I, Hämmerle CHF. The effect of dentin desensitizer on shear bond strength of conventional and self-adhesive resin luting cements after aging. Oper Dent 2011; 36:492-501. [PMID: 21843027 DOI: 10.2341/10-292-l] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study tested the impact of Gluma Desensitizer on the shear bond strength (SBS) of two conventional (RelyX ARC, Panavia 21) and two self-adhesive (RelyX Unicem, G-Cem) resin luting cements after water storage and thermocycling. Human third molars (N=880) were embedded in acrylic resin. The buccal dentin was exposed. Teeth were randomly divided into four main groups, and the following cements were adhered: 1) RelyX ARC, 2) Panavia 21, 3) RelyX Unicem, and 4) G-Cem. In half of the teeth in each group, dentin was treated with Gluma Desensitizer. In the conventional cement groups, the corresponding etchant and adhesive systems were applied. SBS of the cements was tested after 1 hour (initial); at 1, 4, 9, 16, and 25 days of water storage; and at 1, 4, 9, 16, and 25 days of thermocycling. SBS data were analyzed by one-way analysis of variance (ANOVA); this was followed by the post hoc Scheffé test and a t-test. Overall, the highest mean SBS (MPa) was obtained by RelyX ARC (ranging from 14.6 ± 3.9 to 17.6 ± 5.2) and the lowest by Panavia 21 in combination with Gluma Desensitizer (ranging from 0.0 to 2.9 ± 1.0). All tested groups with and without desensitizer showed no significant decrease after aging conditions compared with baseline values (p>0.05). Only the Panavia 21/Gluma Desensitizer combination showed a significant decrease after 4 days of thermocyling compared with initial values and 1 day thermocycling. Self-adhesive cements with Gluma Desensitizer showed increased SBS after aging conditions (ranging from 7.4 ± 1.4 to 15.2 ± 3) compared with groups without desensitizer (ranging from 2.6 ± 1.2 to 8.8 ± 2.9). No cohesive failures in dentin were observed in any of the test groups. Although self-adhesive cements with and without desensitizer presented mainly adhesive failures after water storage (95.8%) and thermocyling (100%), conventional cement (RelyX ARC) showed mainly mixed failures (90.8% and 89.2%, after water storage and thermocyling, respectively). Application of the Gluma Desensitizer to dentin before cementation had a positive effect on the SBS of self-adhesive cements.
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Affiliation(s)
- B Stawarczyk
- Clinic of Fixed and Removable Prosthodonticsand Dental Material Science, Center of Dental Medicine, University of Zurich, Switzerland.
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KÜLÜNK ŞAFAK, SARAÇ DUYGU, KÜLÜNK TOLGA, KARAKAŞ ÖZLEM. The Effects of Different Desensitizing Agents on the Shear Bond Strength of Adhesive Resin Cement to Dentin. J ESTHET RESTOR DENT 2011; 23:380-7. [DOI: 10.1111/j.1708-8240.2011.00415.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Impact of Gluma Desensitizer on the tensile strength of zirconia crowns bonded to dentin: an in vitro study. Clin Oral Investig 2011; 16:201-13. [DOI: 10.1007/s00784-010-0502-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Accepted: 12/06/2010] [Indexed: 11/26/2022]
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Braga RR, Meira JB, Boaro LC, Xavier TA. Adhesion to tooth structure: A critical review of “macro” test methods. Dent Mater 2010; 26:e38-49. [DOI: 10.1016/j.dental.2009.11.150] [Citation(s) in RCA: 218] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2009] [Accepted: 11/19/2009] [Indexed: 11/24/2022]
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Mcleod ME, Price RBT, Felix CM. Effect of Configuration Factor on Shear Bond Strengths of Self-etch Adhesive Systems to Ground Enamel and Dentin. Oper Dent 2010; 35:84-93. [DOI: 10.2341/09-075-l] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
Despite recent improvements in self-etch bonding systems, a two-step etch and rinse system gave consistently higher shear bond strengths to both ground enamel and dentin and would be the best system to use clinically.
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