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Bresser RA, Hofsteenge JW, Buijs GJ, van den Breemer CRG, Özcan M, Cune MS, Gresnigt MMM. Partial glass-ceramic posterior restorations with margins beyond or above the cemento-enamel junction: An observational retrospective clinical study. J Prosthodont Res 2024:JPR_D_23_00219. [PMID: 38684406 DOI: 10.2186/jpr.jpr_d_23_00219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
PURPOSE This observational retrospective clinical study aimed to investigate the survival and success rates of partial indirect lithium disilicate restorations with margins extending above or beyond the cementoenamel junction (CEJ). METHODS The study included patients who underwent partial indirect lithium disilicate restorations with immediate dentin sealing (IDS) between January 2008 and October 2018. All the restorations were placed in a single general dental practice following a standardized protocol. The impact of various predictive variables on the survival rates was assessed. Moreover, modified United States Public Health Service (USPHS) criteria were used to evaluate the survival quality. RESULTS Totally 1146 partial indirect lithium disilicate restorations in 260 patients were evaluated over an average period of 7.5 years. The cumulative survival and success rates were 97.3% and 95.3%, respectively. Margins extending beyond the cemento-enamel junction did not increase the risk of success or survival failure (P > 0.05). Patients with a high risk of caries, male sex, or non-vital teeth had a significantly higher risk of restoration failure (P < 0.05). Restorations with longer clinical service times exhibited marginally lower clinical quality (P < 0.001). CONCLUSIONS Partial indirect glass-ceramic restorations demonstrated survival and success rates of 97.3% and 95.3%, respectively, over an extended period. However, a higher risk of restoration failure existed in patients with a high caries risk for (pre)molars that had undergone endodontic treatment and in males. In terms of the risk of success or survival failure, comparable results were obtained for the positions of the restoration margin in relation to the cemento-enamel junction.
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Affiliation(s)
- Rijkje A Bresser
- University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Restorative Dentistry, Groningen, The Netherlands
| | - Jelte W Hofsteenge
- University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Restorative Dentistry, Groningen, The Netherlands
| | - Gerrit J Buijs
- Buijs Tandartsen, Clinic for General Dentistry, Groningen, The Netherlands
| | - Carline R G van den Breemer
- University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Restorative Dentistry, Groningen, The Netherlands
| | - Mutlu Özcan
- University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Restorative Dentistry, Groningen, The Netherlands
- University of Zurich, Center of Dental Medicine, Division of Dental Biomaterials, Clinic for Reconstructive Dentistry, Zurich, Switzerland
| | - Marco S Cune
- University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Restorative Dentistry, Groningen, The Netherlands
- St. Antonius Hospital, Department of Oral Maxillofacial Surgery, Prosthodontics and Special Dental Care, Nieuwegein, The Netherlands
| | - Marco M M Gresnigt
- University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Department of Restorative Dentistry, Groningen, The Netherlands
- Martini Hospital, Department of Special Dental Care, Groningen, The Netherlands
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Mueller B, Pilecco RO, Valandro LF, Ruschel VC, Pereira GKR, Bernardon JK. Effect of immediate dentin sealing on load-bearing capacity under accelerated fatigue of thin occlusal veneers made of CAD-CAM glass-ceramic and resin composite material. Dent Mater 2023; 39:372-382. [PMID: 36922258 DOI: 10.1016/j.dental.2023.03.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 02/05/2023] [Accepted: 03/03/2023] [Indexed: 03/16/2023]
Abstract
OBJECTIVE The objective of this study was to assess the influence of immediate dentin sealing (IDS) on the fatigue behavior of laminate occlusal veneers fabricated with CAD/CAM lithium disilicate ceramic and resin composite. METHODS Forty sound human molars were prepared and randomly divided into 4 groups (n = 10): RC-IDS+ (IDS and resin composite occlusal laminate veneer); RC-IDS- (resin composite occlusal laminate veneer without IDS); LD-IDS+ (IDS and lithium disilicate laminate veneer); LD-IDS- (lithium disilicate occlusal laminate veneer without IDS). The restorations were obtained using a digital workflow. After surface conditioning and bonding, thermocycling and accelerated fatigue tests (20 Hz, 5000 cycles with an initial load of 300 N, step-size of 100 N for 10,000 cycles, up to 1000 N, and then a step-size of 50 N until failure) were conducted. Fatigue data were recorded for both outcomes (crack or fracture) and statistically analyzed. Fractographic and adhesive interface analysis were conducted. RESULTS The indirect resin composite groups showed better fatigue behavior compared to lithium disilicate. IDS only had a positive effect for the survival of resin composite restorations for the 'fracture' outcome. Evident presence of micro-gaps at the adhesive interface in the LD-IDS- group could be noted. SIGNIFICANCE Immediate dentin sealing improved fatigue resistance behavior of resin composite occlusal veneers. However, this effect was not observed in lithium disilicate veneers.
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Affiliation(s)
- Bruna Mueller
- MSciD and PhD Post-Graduate Program in Oral Science, Ontological Clinic, Faculty of Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina State, Brazil
| | - Rafaela Oliveira Pilecco
- MSciD and PhD Post-Graduate Program in Oral Science, Prosthetic Dentistry Unit, Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil
| | - Luiz Felipe Valandro
- MSciD and PhD Post-Graduate Program in Oral Science, Prosthetic Dentistry Unit, Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil
| | - Vanessa Carla Ruschel
- MSciD and PhD Post-Graduate Program in Oral Science, Ontological Clinic, Faculty of Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina State, Brazil
| | - Gabriel Kalil Rocha Pereira
- MSciD and PhD Post-Graduate Program in Oral Science, Prosthetic Dentistry Unit, Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Jussara Karina Bernardon
- MSciD and PhD Post-Graduate Program in Oral Science, Ontological Clinic, Faculty of Dentistry, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina State, Brazil
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Ding J, Jin Y, Feng S, Chen H, Hou Y, Zhu S. Effect of temporary cements and their removal methods on the bond strength of indirect restoration: a systematic review and meta-analysis. Clin Oral Investig 2023; 27:15-30. [PMID: 36422719 PMCID: PMC9877054 DOI: 10.1007/s00784-022-04790-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 11/13/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVES For a conventional indirect restoration, temporary cementation inevitably contaminated collapsed dentin collagen. The purpose of this review was to evaluate the optimal strategy for minimizing its negative effects. MATERIAL AND METHODS Databases such as PubMed, Web of Science, EMBASE, and the Cochrane Library were searched for in vitro studies, involving the influence of immediate dentin sealing (IDS), different temporary cements, and their removal strategies on dentin bond strength. The meta-analysis used the inverse variance method with effect method of the standardized mean difference and statistical significance at p ≤ 0.05. The I2 value and the Q-test were used to assess the heterogeneity. RESULTS A total of 14 in vitro trials were subjected to the meta-analysis. Within the study's limitations, we assumed that IDS eliminated the negative effects of temporary bonding, achieving the comparable immediate bond strength with the control (p = 0.46). In contrast, under delayed dentin sealing (DDS), temporary cementation statistically decreased bond strength (p = 0.002). Compared with resin-based and non-eugenol zinc oxide cements, polycarboxylate and calcium hydroxide cements performed better on bond strength with no statistical difference from the control group (p > 0.05). Among the removal methods of temporary cements, the Al2O3 abrasion restored the decreased bond strength (p = 0.07) and performed better than hand instruments alone (p = 0.04), while pumice removal slightly reduced the bond strength in contrast with the control group (p = 0.05, 95% CI = - 1.62 to 0). CONCLUSIONS The choices of IDS, polycarboxylate and calcium hydroxide temporary cements, Al2O3 abrasion removal method were feasible and efficient to enhance the bond strength. CLINICAL RELEVANCE It is worthwhile applying IDS technique, polycarboxylate and calcium hydroxide temporary cements during indirect restoration. The Al2O3 abrasion of cleaning dentin can minimize the negative effects of temporary cement.
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Affiliation(s)
- Jingyu Ding
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012 Jilin China
| | - Yifu Jin
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012 Jilin China
| | - Shanshan Feng
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012 Jilin China
| | - Huan Chen
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012 Jilin China
| | - Yanyan Hou
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012 Jilin China
| | - Song Zhu
- Department of Prosthodontics, Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Chaoyang District, Changchun, 130012 Jilin China
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Saadeddin N, Al-Khalil MA, Al-Adel O. Effect of immediate dentin sealing on the fracture strength of lithium disilicate ceramic onlays. Swiss Dent J 2022; 132:482-489. [PMID: 35477221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This study aimed to evaluate the effect of immediate dentin sealing (IDS) on the fracture strength of ceramic onlays when compared with delayed dentin sealing (DDS). Twenty extracted human maxillary premolars were randomly divided into 2 groups according to the dentin sealing technique (n=10). A standardized mesio-occlusal-distal cavity was prepared with reduction of the palatal cusp. The dentin surfaces of the IDS group were immediately sealed after finishing the preparation (before taking impressions, temporization, and 14-day storage at 37°C) using a bonding system (ALL-BOND 3®, ALL-BOND 3® RESIN) and flowable composite (Te-Econom Flow). Impressions were made and temporary restorations were fabricated using PRO-V FILL®. The wax patterns were milled and the onlays were fabricated by heat-pressing technique (IPS e.max Press). After bonding the final restorations with resin cement (Variolink N), the specimens were thermocycled. Fracture strength was measured using a universal testing machine (Testometric M350-10KN) at 1 mm/min until failure occurred. Student's t-test was used to evaluate the results of the fracture strength test. The failure mode was examined using a stereomicroscope. The mean fracture strength in the IDS group (1335 ± 335 N) was statistically significantly higher than that for the DDS group (931 ± 274 N) (p < 0.05). Fracture of the restoration with a small portion of the tooth was the most frequent mode of failure. Within the limitation of this in vitro study, there was an improvement in the fracture strength of ceramic onlays with the use of IDS. However, the ceramic onlays were strong enough to withstand the physiological mastication force in both groups.
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Affiliation(s)
- Nader Saadeddin
- Department of Fixed Prosthodontics, Faculty of Dentistry, Damascus University, Damascus, the Syrian Arab Republic
| | - Manar Ali Al-Khalil
- Department of Fixed Prosthodontics, Faculty of Dentistry, Damascus University, Damascus, the Syrian Arab Republic
| | - Omar Al-Adel
- Department of Fixed Prosthodontics, Faculty of Dentistry, Damascus University, Damascus, the Syrian Arab Republic
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Elbishari H, Elsubeihi ES, Alkhoujah T, Elsubeihi HE. Substantial in-vitro and emerging clinical evidence supporting immediate dentin sealing. Jpn Dent Sci Rev 2021; 57:101-110. [PMID: 34354787 PMCID: PMC8322125 DOI: 10.1016/j.jdsr.2021.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 03/26/2021] [Accepted: 05/27/2021] [Indexed: 02/07/2023] Open
Abstract
The application of resin adhesive to freshly cut dentin after teeth preparation, the so-called immediate dentin sealing (IDS) has been suggested as an alternative to the delayed dentin sealing (DDS), a technique in which resin adhesive is applied just before final bonding of indirect restorations. The aim of this review is to demonstrate the evidence of the claimed advantages made by the proponents of IDS technique. The results of this review revealed substantial in-vitro evidence supporting the IDS benefits including improved bond strength, reduced dentin permeability, improved restorations’ adaptation, and increased fracture strength of the restorations. Clinical studies have shown that IDS improves survival of ceramic laminate veneers bonded to prepared teeth with increased exposure of dentin. Moreover, it has been shown that IDS reduces post-cementation hypersensitivity in full coverage restorations, which is characterized by exposure of a large number of dentinal tubules. The selection of filled resin adhesive that is capable of producing thick adhesive layer appears to contribute to the success of the technique. Furthermore, careful management of the oxygen inhibition layer before conventional impression making and proper cleaning of the residual temporary cement used with provisional restorations appears to affect the outcome of the restorations.
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Affiliation(s)
- Haitham Elbishari
- Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine & Health Sciences, P.O. Box 505055, Dubai, United Arab Emirates
| | | | - Taif Alkhoujah
- Ajman University, P.O. Box 346, Ajman, United Arab Emirates
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Weng JH, Chen HL, Chen G, Cheng CH, Liu JF. Compressive strength of lithium disilicate inlay cementation on three different composite resins. J Dent Sci 2021; 16:994-1000. [PMID: 34141115 PMCID: PMC8189877 DOI: 10.1016/j.jds.2021.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 01/18/2021] [Indexed: 11/24/2022] Open
Abstract
Background/purpose Ceramic restorations have been increasingly applied over recent years. But the performance of cement is still unknown after cementation. This study was aimed to compare the compressive strength and the performances of three different types of composite resin after lithium disilicate inlay cementation. Materials and methods Twenty-four human maxillary premolars were embedded in resin blocks, finished a MOD inlay preparation and scanned with an extraoral scanner. Lithium disilicate ceramic inlays (IPS e.max, Ivoclar Vivadent, Liechtenstein) were fabricated according to the scanner's model. All the specimens were then etched, bonded, and cemented with three different composite resins. Right after 5000 thermal cyclings, the specimens were accepted compressive tests to evaluate the compressive strength and failure types. Moreover, the fracture fragments of the specimens were examined using scanning electron microscopy (SEM) to verify the fracture type. Results Dual-cured resin cement (Rely X Ultimate) showed the highest compressive strength (1002 ± 508 N), followed by the light-cured flowable resin (Z350 XT) (971 ± 209 N) and light-cured bulkfill (Filtek Bulkfill) resin (581 ± 191 N). Type IV (root fracture) failures in the dual-cured resin cement group was 25%, and light-cured flowable resin was 37.5%. But none of type IV fracture was found in the light-cured bulkfill flowable group. Conclusion Dual-cured resin cement demonstrates the highest compressive strength after ceramic inlay cementation. Light-cured bulkfill resin shows the lowest compressive strength, but catastrophic failure is absent in this group.
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Affiliation(s)
- Jui-Hung Weng
- Department of Stomatology, Taichung Veteran General Hospital, Taichung, Taiwan.,School of Dentistry, Chung Shan Medical University, Taichung, Taiwan
| | - Hui-Ling Chen
- Department of Stomatology, Taichung Veteran General Hospital, Taichung, Taiwan.,School of Dentistry, National Yang Ming University, Taipei, Taiwan
| | - Gin Chen
- Department of Stomatology, Taichung Veteran General Hospital, Taichung, Taiwan.,School of Dentistry, Chung Shan Medical University, Taichung, Taiwan
| | - Chung-Hsiao Cheng
- Department of Stomatology, Taichung Veteran General Hospital, Taichung, Taiwan
| | - Jeng-Fen Liu
- Department of Stomatology, Taichung Veteran General Hospital, Taichung, Taiwan.,School of Dentistry, National Yang Ming University, Taipei, Taiwan
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Van den Breemer CRG, Buijs GJ, Cune MS, Özcan M, Kerdijk W, Van der Made S, Gresnigt MMM. Prospective clinical evaluation of 765 partial glass-ceramic posterior restorations luted using photo-polymerized resin composite in conjunction with immediate dentin sealing. Clin Oral Investig 2020; 25:1463-1473. [PMID: 32785851 PMCID: PMC7878261 DOI: 10.1007/s00784-020-03454-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 07/07/2020] [Indexed: 11/19/2022]
Abstract
Objectives To evaluate the clinical performance of partial glass-ceramic (IPS e.max Press) posterior restorations. Materials and methods A total of 765 restorations in 158 patients were placed between 2008 and 2018 and evaluated in a prospective study during regular dental care visits between 2015 and 2018. The restorations were luted with a conventional photo-polymerized resin composite (HFO) in conjunction with an Immediate Dentin Sealing procedure (IDS). Intra-oral photographs and radiographs were made and evaluated using USPHS criteria. Results The mean observation time was 53.3 months (range 3–113 months). Three absolute failures occurred (tooth fractures, n = 2; apical re-infection, n = 1) all leading to the loss of the restored tooth. Repairable and salvageable failures occurred in 9 teeth (endodontic complications, n = 7; secondary caries, n = 1; debonding, n = 1). The survival and success rates according to Kaplan-Meier after 5 years cumulated to 99.6% and 98.6%, respectively. Location (premolar/molar and mandibula/maxilla), pre-restorative endodontic status (vital/devitalised) and extension of the indirect ceramic restoration (number of sides and cusps involved) did not significantly affect the cumulative success rate (log rank test, p > 0.05). The condition of the vast majority of the restorations remained unaffected for 5 years. Conclusions Partial glass-ceramic posterior restorations (pressed lithium disilicate (IPS e.max press, Ivoclar Vivadent) luted by means of a conventional photo-polymerized resin composite in conjunction with the use of an IDS procedure have an excellent medium-term prognosis. Clinical relevance Partial glass-ceramic posterior restorations can be considered as a highly reliable treatment option. Location and extension of the restoration and pre-restorative endodontic status do not affect success rate.
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Affiliation(s)
- Carline R G Van den Breemer
- Department of Restorative Dentistry and Biomaterials, Center for Dentistry and Oral Hygiene, University Medical Center Groningen, Antonius Deusinglaan 1, 9713, AV, Groningen, The Netherlands.
| | | | - Marco S Cune
- Department of Restorative Dentistry and Biomaterials, Center for Dentistry and Oral Hygiene, University Medical Center Groningen, Antonius Deusinglaan 1, 9713, AV, Groningen, The Netherlands.,Department of Oral-Maxillofacial Surgery, Prosthodontics and Special Dental Care, St. Antonius Hospital Nieuwegein, Nieuwegein, The Netherlands.,Department of Oral Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Mutlu Özcan
- Division of Dental Materials, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, University of Zurich, Zurich, Switzerland
| | - Wouter Kerdijk
- Department of Education and Research, Hanze University of Applied Sciences, Groningen, The Netherlands
| | | | - Marco M M Gresnigt
- Department of Restorative Dentistry and Biomaterials, Center for Dentistry and Oral Hygiene, University Medical Center Groningen, Antonius Deusinglaan 1, 9713, AV, Groningen, The Netherlands.,Department of Special Care, Martini Hospital, Groningen, The Netherlands
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Hofsteenge JW, Hogeveen F, Cune MS, Gresnigt MMM. Effect of immediate dentine sealing on the aging and fracture strength of lithium disilicate inlays and overlays. J Mech Behav Biomed Mater 2020; 110:103906. [PMID: 32957211 DOI: 10.1016/j.jmbbm.2020.103906] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVES The objectives of this study were to compare the in vitro, laboratory aging, fracture strength, failure mode and reparability of molars restored with lithium disilicate inlays and overlays in conjunction with or without immediate dentin sealing (IDS). METHODS Forty extracted, sound human molars were selected and divided into four groups: 1) Inlays with IDS; 2) Inlays without IDS; 3) Overlays with IDS; 4) Overlays without IDS. Standard MOD preparations were made (3 mm wide, 5 mm deep) and in groups 2 and 4, all the cusps were reduced by 2 mm. Directly following tooth preparation, IDS was applied in specimens belonging to groups 1 and 3. The indirect restorations were luted with a heated composite. The restored teeth were subsequently challenged during aging (1.2 million cycles) and thermocycling loading (8000 cycles, 5-55 degrees C). Subsequently, the fracture strength was tested by a load to failure test at 45°. A failure analysis was performed using light- and scanning electron microscopy. The results were analyzed using two-way ANOVA and a Fisher exact test. RESULTS Mean fracture load + SD (N) were: Group 1 (n = 12): 1610 ± 419; Group 2 (n = 12): 1115 ± 487; Group 3 (n = 12): 2011 ± 496; Group 4 (n = 12): 1837 ± 406. Teeth restored with an onlay were stronger than those restored with an inlay restoration (p < .001). Teeth with IDS were stronger overall than those without IDS (p = .026). The interaction between preparation type and the mode of dentin conditioning had no statistically significant influence on fracture strength (p = .272). Subsequently, custom hypothesis tests showed that there was no statistically significant difference in fracture strength between inlays with IDS and overlays without IDS (p = .27). Overlays tend to fail in a more destructive, non-reparable way (p = .003). SIGNIFICANCE Both variables IDS and overlay preparation improve overall fracture strength. Inlays with IDS and overlays without IDS didn't differ in fracture strength. Both inlays and overlays are strong enough to withstand physiological chewing forces.
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Hayashi K, Maeno M, Nara Y. Influence of immediate dentin sealing and temporary restoration on the bonding of CAD/CAM ceramic crown restoration. Dent Mater J 2019; 38:970-980. [PMID: 31434832 DOI: 10.4012/dmj.2018-313] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study examined the influences of clinical application of immediate dentin sealing (IDS) and temporary restoration (TR) on prepared abutment surfaces on the bonding of computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic crown restorations after cyclic loading. Standardized abutments were prepared in 60 human mandibular premolars. Dentin surfaces of half of the specimens were sealed with adhesive and flowable composite, while those of the other half were not sealed. A half of both sealed and non-sealed specimens were restored using a temporary cement and temporary crown. Each individual CAD/CAM ceramic crown was fabricated and cemented to an individual abutment. The restored specimens were subjected to cyclic loading, and the micro tensile bond strengths (μ-TBS) were measured. IDS contributed to an increase in the bond strength, whereas TR did not affect the bond strength. IDS restoration without TR yielded the maximum bond reliability in achieve specific μ-TBS values for the restoration and ensuring durability against debonding.
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Affiliation(s)
- Kotaro Hayashi
- Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University
| | - Masahiko Maeno
- Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University
| | - Yoichiro Nara
- Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University
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10
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Khakiani MI, Kumar V, Pandya HV, Nathani TI, Verma P, Bhanushali NV. Effect of Immediate Dentin Sealing on Polymerization of Elastomeric Materials: An Ex Vivo Randomized Controlled Trial. Int J Clin Pediatr Dent 2019; 12:288-292. [PMID: 31866712 PMCID: PMC6898876 DOI: 10.5005/jp-journals-10005-1657] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Statement of problem Interactions are suspected between resin coating and elastomeric impression material. Purpose The purpose of this study was to identify possible interactions between two impression materials and resin-coated tooth surfaces. Materials and methods Extracted molars (n = 10) underwent 1 of the 4 procedures: control group (unsealed tooth surface/impression); IDS group (immediate dentin sealing/impression); IDS/AB group (immediate dentin sealing/air blocking/impression); IDS/AB-P group (immediate dentin sealing/air blocking/pumicing/impression). Dentin bonding agents used were Adper single bond 2 and Clearfil SE bond. Impression materials used were Impregum Soft (polyether) and Aquasil (A silicone). A stereomicroscope was used to detect any residual impression material on the bonded tooth surface. Results The IDS group showed 100% faulty impressions. Air blocking the resin coating did not completely eliminate the oxygen-inhibited layer of Adper single bond 2. Clearfil SE Bond along with Aquasil generated ideal impressions in group IDS/AB, while all other combinations resulted in faulty impressions. The IDS/AB-P group yielded ideal impressions with Aquasil but generated faulty impressions with Impregum soft in most specimens. Conclusion Immediate dentin sealing should be followed by air blocking and pumicing to generate ideal impressions with Aquasil (A silicone). Impregum Soft (polyether) is not recommended in combination with immediate dentin sealing. How to cite this article Khakiani MI, Kumar V, et al. Effect of Immediate Dentin Sealing on Polymerization of Elastomeric Materials: An Ex Vivo Randomized Controlled Trial. Int J Clin Pediatr Dent 2019;12(4):288–292.
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Affiliation(s)
| | - Vaibhav Kumar
- Department of Public Health Dentistry, Terna Dental College, Navi Mumbai, Maharashtra, India
| | | | - Tousif I Nathani
- Department of Endodontics, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Priya Verma
- Department of Pedodontics and Preventive Dentistry, KD Dental College and Hospital, Mathura, Uttar Pradesh, India
| | - Nikhil V Bhanushali
- Department of Public Health Dentistry, Terna Dental College, Navi Mumbai, Maharashtra, India
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Yazigi C, Kern M, Chaar MS. Influence of various bonding techniques on the fracture strength of thin CAD/CAM-fabricated occlusal glass-ceramic veneers. J Mech Behav Biomed Mater 2017; 75:504-11. [PMID: 28843882 DOI: 10.1016/j.jmbbm.2017.08.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/06/2017] [Accepted: 08/10/2017] [Indexed: 11/21/2022]
Abstract
OBJECTIVES To evaluate the efficiency of immediate dentin sealing and the effects of different bonding protocols on the fracture strength of CAD/CAM occlusal veneers bonded to exposed dentin. METHODS Ninety-six extracted maxillary premolars were initially divided into three main groups with 32 specimens each: without immediate dentin sealing, immediate dentin sealing/total etching and immediate dentin sealing/selective etching. Teeth were identically prepared in the dentin to receive occlusal veneers of 0.8mm thickness, milled from lithium disilicate ceramic blocks (IPS e.max CAD). Each main group was later subdivided, according to the pre-cementation surface etching protocol (total/selective), into two subgroups with 16 specimens each. All restorations were adhesively bonded using a resin cement (Variolink Esthetic). Half of the specimens of each subgroup were subjected to thermo-dynamic loading in a chewing simulator with 1,200,000 cycles at 10kg load. The other half and the surviving specimens were subjected to quasi-static loading until failure. Statistical analysis was performed using three-way ANOVA and Tukey's post-hoc tests. RESULTS All specimens except one survived the artificial aging. A significantly higher fracture strength of restorations (p ≤ 0.001) was obtained when immediate dentin sealing was followed regardless of the etching method with values ranging from a minimum of 1122 ± 336N to a maximum of 1853 ± 333N. Neither the pre-cementation treatment nor the artificial aging had a statistical significant effect on the fracture strength. SIGNIFICANCE Immediate dentin sealing protocol is recommended whenever dentin is exposed during the preparation for thin glass-ceramic occlusal veneers.
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van den Breemer CRG, Özcan M, Cune MS, van der Giezen R, Kerdijk W, Gresnigt MMM. Effect of immediate dentine sealing on the fracture strength of lithium disilicate and multiphase resin composite inlay restorations. J Mech Behav Biomed Mater 2017; 72:102-109. [PMID: 28477520 DOI: 10.1016/j.jmbbm.2017.04.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 11/25/2022]
Abstract
PURPOSE Limited information is available on the effect of Immediate Dentin Sealing (IDS) on the fracture strength of indirect partial posterior restorations. This study evaluated the effect of IDS on the fracture strength and failure types of two indirect restorative materials. MATERIALS AND METHODS Standard MOD inlay preparations were made on sound molars (N=40, n=10 per group) and randomly divided into four groups to receive the inlay materials with and without the application of IDS: Group L-IDS-: Li2Si2O5 (Lithium disilicate, IPS e.max) without IDS; Group L-IDS+: Li2Si2O5 with IDS; Group MR-IDS-: Multiphase resin composite (MR, Lava Ultimate) without IDS; MR-IDS+: MR with IDS. Inlays made of L were etched with 5% hydrofluoric acid, and MR inlays were silica coated. After silanization, they were cemented using adhesive resin cement (Variolink Esthetic DC). The specimens were thermo-mechanically aged (1.2×106 cycles, 1.7Hz, 8000 cycles, 5-55°C) and then subjected to load to failure (1 mm/min). Failure types and locations of debondings were classified. Data were statistically analyzed using ANOVA, Mann Whitney U-test and Chi-square tests (α=0.05). Two-parameter Weibull distribution values including the Weibull modulus, scale (m) and shape (0), values were calculated. RESULTS After aging conditions, no apparent changes were observed in marginal integrity but occlusal wear facets were more common with MR than with L (p<0.001). Material type and the application of IDS significantly affected the results (p=0.013). While group L-IDS- showed the lowest mean fracture strength (1358±506N) among all groups (p<0.05), application of IDS significantly increased the results significantly (L-IDS+: 2035±403N) (p=0.006). MR groups with and without IDS, did not show significant difference (MR-IDS-: 1861±423, MR-IDS+: 1702±596 N) (p=0.498). When materials without IDS are compared, L showed significantly lower results than that of MR (p=0.035). With the application of IDS, no significant difference was noted between L and MR materials (p=0.160). Weibull distribution presented the highest shape (0) for L-IDS+ (5.66) compared to those of other groups (3.01-4.76). Neither the material type (p=0.830), nor the application of IDS (p=0.54) affected the severity of the failure types. In 95% of the cases, the IDS layer left adhered on the tooth surface after fracture tests. In groups where no IDS was used, resin cement remained on the tooth surface in 44% of the cases (p=0.001). No significant differences were observed between the materials with respect to cement remnants or IDS after fracture (p=0.880). The incidence of repairable failure types (83%) was more common with L than with MR (75%) material (p>0.05). CONCLUSION Immediate dentin sealing improves adhesion, and thereby the fracture strength of inlays made of lithium disilicate but not that multiphase resin composite.
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Affiliation(s)
- Carline R G van den Breemer
- University Medical Center Groningen, The University of Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, Groningen, The Netherlands.
| | - Mutlu Özcan
- University Medical Center Groningen, The University of Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, Groningen, The Netherlands; University of Zurich, Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zurich, Switzerland
| | - Marco S Cune
- University Medical Center Groningen, The University of Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, Groningen, The Netherlands; St. Antonius Hospital Nieuwegein, Department of Oral and Maxillofacial Surgery, Prosthodontics and Special Dental Care, Nieuwegein, The Netherlands
| | - Rianne van der Giezen
- University Medical Center Groningen, The University of Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, Groningen, The Netherlands
| | - Wouter Kerdijk
- University Medical Center Groningen, The University of Groningen, Center for Dentistry and Oral Hygiene, Department of Public and Individual Oral Health, Groningen, The Netherlands
| | - Marco M M Gresnigt
- University Medical Center Groningen, The University of Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, Groningen, The Netherlands
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Qanungo A, Aras MA, Chitre V, Mysore A, Amin B, Daswani SR. Immediate dentin sealing for indirect bonded restorations. J Prosthodont Res 2016; 60:240-249. [PMID: 27131858 DOI: 10.1016/j.jpor.2016.04.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 03/27/2016] [Accepted: 04/03/2016] [Indexed: 11/18/2022]
Abstract
PURPOSE The aim of this article is to review available literature on the clinical procedure of immediate dentine sealing for indirect bonded restorations. STUDY SELECTION More than 40 articles reporting the technique, studies, outcomes, etc. were reviewed after PUBMED/MEDLINE search, most of them addressing the specific situation of dentin bonding for indirect restorations. RESULTS It is known that tooth preparation for indirect bonded restorations can result in significant dentin exposures. Immediate application and polymerization of the dentin bonding agent to the freshly cut dentin, prior to impression making is therefore recommended by some authors. Literature indicates that this procedure, immediate dentine sealing (IDS), appears to achieve improved bond strength, fewer gap formations, decreased bacterial leakage, and reduces post-cementation sensitivity. This rational approach to adhesion is also reported to have a positive influence on tooth structure preservation, patient comfort, and long term survival of indirect bonded restorations. CONCLUSION In the extensive literature regarding advantages of using IDS technique significant differences have been shown when compared to Delayed Dentine Sealing. Although more research is required in this field, presently there are NO scientific reasons not to recommend IDS in routine practice.
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Affiliation(s)
- Anchal Qanungo
- Dept. of Prosthodontics, Goa Dental College and Hospital, India.
| | - Meena Ajay Aras
- Dept. of Prosthodontics, Goa Dental College and Hospital, India.
| | - Vidya Chitre
- Dept. of Prosthodontics, Goa Dental College and Hospital, India.
| | - Ashwin Mysore
- Dept. of Prosthodontics, Goa Dental College and Hospital, India.
| | - Bhavya Amin
- Dept. of Prosthodontics, Goa Dental College and Hospital, India.
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Gresnigt MMM, Cune MS, de Roos JG, Özcan M. Effect of immediate and delayed dentin sealing on the fracture strength, failure type and Weilbull characteristics of lithiumdisilicate laminate veneers. Dent Mater 2016; 32:e73-81. [PMID: 26856454 DOI: 10.1016/j.dental.2016.01.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 08/11/2015] [Accepted: 01/15/2016] [Indexed: 11/16/2022]
Abstract
OBJECTIVES Adhesion on dentin is less reliable than on enamel, which could affect the durability of laminate veneers (LV). Immediate dentin sealing (IDS) is suggested instead of delayed dentin sealing (DDS) to overcome hypersensitivity and prevent debonding from dentin. This study evaluated the effect of IDS and DDS on the durability of Li2Si2O5 laminate veneers in vitro. METHODS Window preparations were made on the labial surfaces of sound maxillary central incisors (N=50). They were randomly divided into five groups: Group 1: Enamel only+H3PO4+Adhesive (control); Group 2: <1/4 dentin+H3PO4+DDS (2 weeks later); Group 3: Complete dentin+H3PO4+DDS (2 weeks later); Group 4: <1/4 dentin+H3PO4+IDS; Group 5: Complete dentin+H3PO4+IDS. Li2Si2O5 laminate veneers (e.max Press) were bonded to the labial surfaces of the teeth with adhesive resin cement (Variolink Veneer). IDS layers were silicacoated (CoJet System) and silanized (ESPE-Sil). The teeth with their bonded laminates were thermocycled (10.000× cycles) and then subjected to static loading (1mm/min). Failure type and location after debonding were classified. Data were analyzed using ANOVA and Tukey's post hoc test (α=0.05). Two-parameter Weibull distribution values including the Weibull modulus, scale (m) and shape (0), values were calculated. RESULTS Mean fracture strength (N) per group in descending order was as follows: Group 5 (576±254), Group 4 (478±216), Group 1 (473±159), Group 2 (465±186), and Group 3 (314±137). The presence of complete dentin exposure sealed with DDS after 2 weeks on the bonded surface (Group 3) resulted in significantly lower fracture strength results than those in group 5 with IDS (p=0.034). Weibull distribution presented higher shape (0) for Group 1 (3.67), than those of other groups (2.51-2.89). Failure types were predominantly adhesive failure between the cement and the laminate veneer in Groups 1, 2, 4 whereas Group 3 presented more often complete adhesive failures between the cement and dentin. In Group 5, failures showed some IDS and cement with or without ceramic fracture attached on the tooth. SIGNIFICANCE When laminate veneers are bonded to a large dentin substrate, application of immediate dentin sealing improves adhesion and thereby, the fracture strength of Li2Si2O5 laminate veneers.
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Affiliation(s)
- Marco M M Gresnigt
- University Medical Center Groningen, The University of Groningen, Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, The Netherlands.
| | - Marco S Cune
- University Medical Center Groningen, The University of Groningen, Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, The Netherlands
| | - Joanne G de Roos
- University Medical Center Groningen, The University of Groningen, Groningen, Center for Dentistry and Oral Hygiene, Department of Fixed and Removable Prosthodontics, The Netherlands
| | - Mutlu Özcan
- University of Zurich, Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zurich, Switzerland
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Ghiggi PC, Steiger AK, Marcondes ML, Mota EG, Burnett LH, Spohr AM. Does immediate dentin sealing influence the polymerization of impression materials? Eur J Dent 2015; 8:366-372. [PMID: 25202218 PMCID: PMC4144136 DOI: 10.4103/1305-7456.137650] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Objectives: The objective of the following study is to evaluate the interaction between the resin materials used in immediate dentin sealing (IDS) techniques and impression materials with two different techniques to eliminate the oxygen-inhibition layer. Materials and Methods: The occlusal dentin surface of 35 human molars was exposed. The teeth were used in two Groups: Group 1 – Impression with Express XT; Group 2 – Impression with Impregum. Groups 1 and 2 were divided into 14 subgroups: Groups 1a and 2a – Control groups; 1b and 2b – IDS with Clearfil SE Bond (CSE); 1c and 2c – IDS with CSE + additional polymerization with glycerin jelly; 1d and 2d – IDS with CSE + alcohol; 1e and 2e – IDS with CSE and Protect Liner F (PLF); 1f and 2f – IDS with CSE and PLF + additional polymerization with glycerin jelly; and 1g and 2g – IDS with CSE and PLF + alcohol. Five teeth were used in each experimental group, and the tooth surface was photographed using a digital camera. Results: Small quantity of unpolymerized impression material remained attached to the CSE or to the PLF in Groups 1b and 1e. Groups 1c and 1d prevented the interaction. Small quantity of polymerized impression material remained attached to the CSE or to the PLF for Groups 2b and 2e. The same interaction was observed for Groups 2c and 2d. For Groups 2c and 2f, no interactions were observed. Conclusion: Resin materials interacted with impression materials. The application of glycerin jelly and alcohol prevented the interaction of CSE with Express XT and PLF with Impregum; however, these treatments were not completely effective in preventing the interaction of CSE with Impregum and PLF with Express XT.
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Affiliation(s)
- Paula Cristine Ghiggi
- Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Arno Kieling Steiger
- Department of Research and Development, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Maurem Leitão Marcondes
- Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Eduardo Gonçalves Mota
- Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Luiz Henrique Burnett
- Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Ana Maria Spohr
- Department of Dental Materials, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
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Leesungbok R, Lee SM, Park SJ, Lee SW, Lee DY, Im BJ, Ahn SJ. The effect of IDS ( immediate dentin sealing) on dentin bond strength under various thermocycling periods. J Adv Prosthodont 2015; 7:224-32. [PMID: 26140174 PMCID: PMC4486618 DOI: 10.4047/jap.2015.7.3.224] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 03/19/2015] [Accepted: 04/02/2015] [Indexed: 11/29/2022] Open
Abstract
PURPOSE The purpose of this study was to find out the effect of immediate dentin sealing (IDS) on bond strength of ceramic restoration under various thermocycling periods with DBA (dentin bonding agent system). MATERIALS AND METHODS Fifty freshly extracted human mandibular third molars were divided into 5 groups (1 control and 4 experimental groups) of 10 teeth. We removed enamel layer of sound teeth and embedded them which will proceed to be IDS, using All Bond II. A thermocycling was applied to experimental groups for 1, 2, 7, 14 days respectively and was not applied to control group. IPS Empress II for ceramic was acid-etched with ceramic etchant (9.5% HF) and silane was applied. Each ceramic disc was bonded to specimens with Duo-link, dual curable resin cement by means of light curing for 100 seconds. After the cementation procedures, shear bond strength measurement and SEM analysis of the fractured surface were done. The data were analyzed with a one-way ANOVA and Tukey multiple comparison test (α=.05). RESULTS There were no statistically significant differences between 4 experimental groups and control group, however the mean value started to decrease in group 7d, and group 14d showed the lowest mean bond strength in all groups. Also, group 7d and 14d showed distinct exposed dentin and collapsed hybrid layer was observed in SEM analysis. CONCLUSION In the present study, it can be concluded that ceramic restorations like a laminate veneer restoration should be bonded using resin cement within one week after IDS procedure.
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Affiliation(s)
- Richard Leesungbok
- Department of Biomaterials & Prosthodontics, Kyung Hee University Hospital at Gangdong, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Sang-Min Lee
- Department of Prosthodontics, Graduate School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Su-Jung Park
- Department of Biomaterials & Prosthodontics, Kyung Hee University Hospital at Gangdong, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Suk-Won Lee
- Department of Biomaterials & Prosthodontics, Kyung Hee University Hospital at Gangdong, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Do Yun Lee
- Department of Prosthodontics, Graduate School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Byung-Jin Im
- Department of Prosthodontics, Graduate School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Su-Jin Ahn
- Department of Biomaterials & Prosthodontics, Kyung Hee University Hospital at Gangdong, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
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De Rose L, Krejci I, Bortolotto T. Immediate endodontic access cavity sealing: fundamentals of a new restorative technique. Odontology 2014; 103:280-5. [PMID: 25183493 DOI: 10.1007/s10266-014-0174-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 07/18/2014] [Indexed: 11/29/2022]
Abstract
Endodontic access cavity sealing is conventionally performed after endodontic irrigation, referred to as delayed endodontic sealing (DES). Evidence shows that endodontic irrigation with NaOCl decreases dentinal bond quality and could cause coronal leakage. Access cavity sealing before endodontic irrigation is a new restorative approach, referred to as immediate endodontic sealing (IES). The primary aim of this in vitro study was to investigate whether IES improved internal adaptation. The secondary aim was to investigate the influence of the viscosity of the composite used to seal the dentine, on the internal adaptation in both IES and DES groups. Third molars (n= 40) with fully developed apices were used. The teeth were prepared into standard Class II MO cavities, and divided in 4 groups according to the approach, and composite viscosity was used for sealing. Group 1: IES + low viscosity composite; group 2: IES + high viscosity composite; group 3: DES + low viscosity composite; and group 4: DES + high viscosity composite. Samples were then sectioned axially for observation using scanning electron microscopy. Outcome was evaluated by determining the internal adaptation of the samples, which was judged based on the percentage of a continuous margin at the tooth-composite interface. The results were analyzed using a two-way analysis of variance and Mann-Whitney test. IES groups exhibited significantly greater internal adaptation (p = 0.000) as compared with DES groups. Composite viscosity did not significantly affect internal adaptation in either IES or DES groups (p > 0.005).
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Affiliation(s)
- Luca De Rose
- Division of Cariology and Endodontology, School of Dentistry, University of Geneva, 11 rue Barthélemy-Menn, 1205, Geneva, Switzerland.
| | - I Krejci
- Division of Cariology and Endodontology, School of Dentistry, University of Geneva, 11 rue Barthélemy-Menn, 1205, Geneva, Switzerland
| | - T Bortolotto
- Division of Cariology and Endodontology, School of Dentistry, University of Geneva, 11 rue Barthélemy-Menn, 1205, Geneva, Switzerland
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Choi YS, Cho IH. An effect of immediate dentin sealing on the shear bond strength of resin cement to porcelain restoration. J Adv Prosthodont 2010; 2:39-45. [PMID: 21165186 PMCID: PMC2984522 DOI: 10.4047/jap.2010.2.2.39] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 05/31/2010] [Accepted: 06/17/2010] [Indexed: 11/18/2022] Open
Abstract
PURPOSE The aim of this study was to determine differences in shear bond strength to human dentin using immediate dentin sealing (IDS) technique compared to delayed dentin sealing (DDS). MATERIALS AND METHODS Forty extracted human molars were divided into 4 groups with 10 teeth each. The control group was light-cured after application of dentin bonding agent (Excite® DSC) and cemented with Variolink® II resin cement. IDS/SE (immediate dentin sealing, Clearfil™ SE Bond) and IDS/SB (immediate dentin sealing, AdapterTM Single Bond 2) were light-cured after application of dentin bonding agent (Clearfil™ SE Bond and Adapter™ Sing Bond 2, respectively), whereas DDS specimens were not treated with any dentin bonding agent. Specimens were cemented with Variolink® II resin cement. Dentin bonding agent (Excite® DSC) was left unpolymerized until the application of porcelain restoration. Shear strength was measured using a universal testing machine at a speed of 5 mm/min and evaluated of fracture using an optical microscope. RESULTS The mean shear bond strengths of control group and IDS/SE group were not statistically different from another at 14.86 and 11.18 MPa. Bond strength of IDS/SE group had a significantly higher mean than DDS group (3.14 MPa) (P < .05). There were no significance in the mean shear bond strength between IDS/SB (4.11 MPa) and DDS group. Evaluation of failure patterns indicates that most failures in the control group and IDS/SE groups were mixed, whereas failures in the DDS were interfacial. CONCLUSION When preparing teeth for indirect ceramic restoration, IDS with Clearfil™ SE Bond results in improved shear bond strength compared with DDS.
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Affiliation(s)
- Yu-Sung Choi
- Department of Prosthodontics, College of Dentistry, Dankook University, Cheonan, Korea
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