51
|
Wang L, Li C, Weir MD, Zhang K, Zhou Y, Xu HHK, Reynolds MA. Novel multifunctional dental bonding agent for Class-V restorations to inhibit periodontal biofilms. RSC Adv 2017; 7:29004-29014. [PMID: 29910954 PMCID: PMC5998673 DOI: 10.1039/c6ra28711e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
We recently developed a dental bonding agent to bond restorations to teeth using nanoparticles of amorphous calcium phosphate (NACP) for remineralization with rechargeable calcium and phosphate ion release. The objectives of this study were to: (1) incorporate an antibacterial monomer dimethylaminohexadecyl methacrylate (DMAHDM) and a protein-repellent agent 2-methacryloyloxyethyl phosphorylcholine (MPC); and (2) investigate protein adsorption and periodontitis-related biofilms for the first time. A primer, used to prime tooth structures for bonding, was made with pyromellitic glycerol dimethacrylate (PMGDM) and 2-hydroxyethyl methacrylate (HEMA). An adhesive was made with PMGDM, ethoxylated bisphenol A dimethacrylate and HEMA. NACP, MPC and DMAHDM were incorporated. Streptococcus gordonii, Actinomyces naeslundii, Porphyromonas gingivalis, Fusobacterium nucleatum were cultured to form single and multi-species biofilms. Colony-forming units (CFU), live/dead, metabolic activity, and polysaccharide were measured. Adding DMAHDM, MPC and NACP into the bonding agent did not compromise the dentin bond strength (p > 0.1). Bonding agents with 5% MPC reduced protein adsorption to 1/15 that of the control (p < 0.05). Bonding agents with 5% DMAHDM + 5% MPC had much greater reduction in biofilms than DMAHDM or MPC alone (p < 0.05). Biofilm CFU was reduced by 3 to 4 log via DMAHDM + MPC. Metabolic activities and polysaccharide of biofilms were also substantially reduced (p < 0.05). In conclusion, a novel bonding agent was developed for dental restorations with inhibition of biofilms, reducing CFU by 3 to 4 log. Besides remineralizartion and acid-neutralization via NACP to inhibit caries as shown previously, the multifunctional adhesive is promising for root restorations with subgingival margins to suppress periodontal pathogens and protect the periodontium.
Collapse
Affiliation(s)
- Lin Wang
- VIP Integrated Department, School and Hospital of Stomatology, Jilin University, Changchun, China
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Chunyan Li
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Michael D. Weir
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Ke Zhang
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
| | - Yanmin Zhou
- Department of Oral Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Hockin H. K. Xu
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore County, MD 21250, USA
| | - Mark A. Reynolds
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| |
Collapse
|
52
|
MAZIOLI CG, PEÇANHA MM, DAROZ LGD, ARAÚJO SIQUEIRA C, FRAGA MAA. Resistência de união de diferentes cimentos resinosos a cerâmica à base de dissilicato de lítio. REVISTA DE ODONTOLOGIA DA UNESP 2017. [DOI: 10.1590/1807-2577.21916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo Introdução O sucesso de restaurações indiretas depende de uma adequada união entre o cimento e o substrato dental. Portanto, a seleção e o conhecimento das características dos agentes cimentantes são importantes para a retenção da restauração indireta. Objetivo Avaliar a resistência de união de dois cimentos resinosos diferentes à cerâmica de dissilicato de lítio. Metodologia Dois grupos experimentais foram confeccionados: cimento resinoso convencional (Grupo CRC) e cimento resinoso autoadesivo (Grupo CRA). Para isso, dez discos de cerâmica de dissilicato de lítio (10 mm) foram pré-fabricados e, sobre cada disco, foram confeccionados quatro postes de cimento (0,7×1,0 mm), obtendo-se um total de 20 amostras de cada tipo de cimento. Os discos tiveram o mesmo tratamento de superfície para os dois grupos, que é padrão para as cerâmicas ricas em sílica, de acordo com o protocolo estabelecido pelo fabricante. As amostras foram submetidas ao teste de microcisalhamento para avaliar a resistência de união entre o cimento e a cerâmica. Posteriormente, o modo de falha foi analisado em microscópio ótico. Resultado Os dados obtidos foram submetidos a teste estatístico. Foi observado que o grupo CRC apresentou maiores valores de resistência de união (15,29 MPa) em relação ao grupo CRA (12,41 MPa). Na análise do modo de falha, nenhuma amostra obteve fratura do tipo adesiva. Em ambos os grupos, CRC (75%) e CRA (65%), obtiveram-se mais falhas do tipo mista, seguidas pela falha coesiva. Conclusão Ambos os cimentos apresentaram adesão à cerâmica. O cimento resinoso convencional apresentou maior adesão a cerâmica à base de dissilicato de lítio que o cimento resinoso autoadesivo.
Collapse
|
53
|
Rajeev V, Arunachalam R, Nayar S, Arunima PR, Ganapathy S, Vedam V. "Ormocer an innovative technology": A replacement for conventional cements and veneer? A comparative in vitro analysis. Eur J Dent 2017; 11:58-63. [PMID: 28435367 PMCID: PMC5379836 DOI: 10.4103/ejd.ejd_113_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Objective: This in vitro study was designed to assess shear bond strength (SBS) of ormocer flowable (OF) resin as a luting agent, ormocer as an indirect veneer material with portrayal of modes of failures using scanning electron microscope (SEM). Materials and Methods: Sixty maxillary central incisors were divided into Group I, II, and III with 20 samples each based on luting cement used. They were OF, self-adhesive (SA) cement, and total etch (TE) cement. These groups were subdivided into “a” and “b” of ten each based on the type of veneering materials used. Veneer discs were fabricated using Ormocer restorative (O) and pressable ceramic (C). Specimens were thermocycled and loaded under universal testing machine for SBS. The statistical analysis was done using one-way ANOVA post hoc Tukey honest significant difference method. Results: A significant difference was observed between the Groups I and II (P < 0.05). The highest mean bond strength when using ormocer veneer was obtained with the Group Ia (19.11 ± 1.92 Mpa) and lowest by Group IIa (8.1 ± 1.04 Mpa), whereas the highest mean bond strength while using ceramic veneer was of similar range for Group Ib (18.04 ± 4.08 Mpa) and Group IIIb (18.07 ± 1.40 Mpa). SEM analysis revealed OF and TE presented mixed type of failure when compared with SA where failure mode was totally adhesive. Conclusion: OF was found equally efficient like TE. Bond strength of ormocer as a veneer was not inferior to ceramic making it one of the promising additions in the field of dentistry.
Collapse
Affiliation(s)
- Vini Rajeev
- Department of Prosthodontics, AIMST University, Kedah, Malaysia
| | | | - Sanjna Nayar
- Department of Prosthodontics, Sree Balaji Dental College and Hospital, Chennai, Tamil Nadu, India
| | - P R Arunima
- Department of Periodontics, PMS Dental College, Thiruvananthapuram, Kerala, India
| | | | - Vaishnavi Vedam
- Department of Oral Pathology, AIMST University, Kedah, Malaysia
| |
Collapse
|
54
|
Soni HK. Application of CAD-CAM for Fabrication of Metal-Free Band and Loop Space Maintainer. J Clin Diagn Res 2017; 11:ZD14-ZD16. [PMID: 28384989 DOI: 10.7860/jcdr/2017/23459.9246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 11/18/2016] [Indexed: 11/24/2022]
Abstract
An ideal occlusion with proper tooth alignment and fully functional teeth is the ultimate goal of all dental treatments. Premature extraction of deciduous teeth is a common sequeale of untreated dental caries in teeth in which the damage is far beyond repair. Premature extraction might lead to loss of space for the successor tooth, drifting of teeth and loss of arch integrity leading to malocclusion in the permanent teeth. To prevent the space loss, space maintainers are designed and delivered at the time of extraction to allow for development of proper functional occlusion in children till the eruption of the succedaneous permanent tooth. A six-year-old female patient with chronic intra-radicular abscess in upper right first primary molar was treated with extraction followed by the placement of BruxZir zirconia space maintainer. Clinical and radiographic examinations were performed at one and six months. At the end of six months, the patient was completely asymptomatic and there were no visible signs of gingival inflammation and tissue irritation at the site of the space maintainer.
Collapse
Affiliation(s)
- Harleen Kaur Soni
- Senior Lecturer, Pedodontics and Preventive Dentistry, Manubhai Patel Dental College , Vadodara, Gujarat, India
| |
Collapse
|
55
|
Attar HE, Elhiny O, Salem G, Abdelrahman A, Attia M. A Twofold Comparison between Dual Cure Resin Modified Cement and Glass Ionomer Cement for Orthodontic Band Cementation. Open Access Maced J Med Sci 2016; 4:695-699. [PMID: 28028417 PMCID: PMC5175525 DOI: 10.3889/oamjms.2016.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 10/04/2016] [Accepted: 10/05/2016] [Indexed: 11/05/2022] Open
Abstract
AIM To test the solubility of dual cure resin modified resin cement in a food simulating solution and the shear bond strength compared to conventional Glass ionomer cement. MATERIALS AND METHOD The materials tested were self-adhesive dual cure resin modified cement and Glass Ionomer (GIC). Twenty Teflon moulds were divided into two groups of tens. The first group was injected and packed with the modified resin cement, the second group was packed with GIC. To test the solubility, each mould was weighed before and after being placed in an analytical reagent for 30 days. The solubility was measured as the difference between the initial and final drying mass. To measure the Shear bond strength, 20 freshly extracted wisdom teeth were equally divided into two groups and embedded in self-cure acrylic resin. Four mm sections of stainless steel bands were cemented to the exposed buccal surfaces of teeth under a constant load of 500 g. Shear bond strength was measured using a computer controlled materials testing machine and the load required to deband the samples was recorded in Newtons. RESULTS GIC showed significantly higher mean weight loss and an insignificant lower Shear bond strength, compared to dual cure resin Cement. CONCLUSION It was found that dual cure resin modified cement was less soluble than glass ionomer cement and of comparable bond strength rendering it more useful clinically for orthodontic band cementation.
Collapse
Affiliation(s)
- Hanaa El Attar
- Suez Canal University, Faculty of Dentistry, Orthodontics, Faculty of Dentistry, Umm al Qura University, Orthodontics, Ismailia - el Gamaa street, Ismailia 0000, Egypt
| | - Omnia Elhiny
- National Research Center, El Bohouth str., Cairo 12622, Egypt
| | - Ghada Salem
- Faculty of Dentistry Fayoum University, Paedoodontics, Fayoum, Egypt
| | | | - Mazen Attia
- Faculty of Dentistry, Beni Suef University, Fixed Prosthodontics, Cairo, Egypt
| |
Collapse
|
56
|
Pathak S, Shashibhushan KK, Poornima P, Reddy VS. In vitro Evaluation of Stainless Steel Crowns cemented with Resin-modified Glass Ionomer and Two New Self-adhesive Resin Cements. Int J Clin Pediatr Dent 2016; 9:197-200. [PMID: 27843249 PMCID: PMC5086005 DOI: 10.5005/jp-journals-10005-1363] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/18/2016] [Indexed: 11/23/2022] Open
Abstract
AIMS To assess and compare the retentive strength of two dual-polymerized self-adhesive resin cements (RelyX U200, 3M ESPE & SmartCem2, Dentsply Caulk) and a resin-modified glass ionomer cement (RMGIC; RelyX Luting 2, 3M ESPE) on stainless steel crown (SSC). MATERIALS AND METHODS Thirty extracted teeth were mounted on cold cured acrylic resin blocks exposing the crown till the cemento-enamel junction. Pretrimmed, precontoured SSC was selected for a particular tooth. Standardized tooth preparation for SSC was performed by single operator. The crowns were then luted with either RelyX U200 or SmartCem2 or RelyX Luting 2 cement. Retentive strength was tested using Instron universal testing machine. The retentive strength values were recorded and calculated by the formula: Load/Area. STATISTICAL ANALYSIS One-way analysis of variance was used for multiple comparisons followed by post hoc Tukey's test for groupwise comparisons. Unpaired t-test was used for intergroup comparisons. RESULTS RelyX U200 showed significantly higher retentive strength than rest of the two cements (p < 0.001). No significant difference was found between the retentive strength of SmartCem2 and RelyX Luting 2 (p > 0.05). CONCLUSION The retentive strength of dual-polymerized self-adhesive resin cements was better than RMGIC, and RelyX U200 significantly improved crown retention when compared with SmartCem2 and RelyX Luting 2. HOW TO CITE THIS ARTICLE Pathak S, Shashibhushan KK, Poornima P, Reddy VVS. In vitro Evaluation of Stainless Steel Crowns cemented with Resin-modified Glass Ionomer and Two New Self-adhesive Resin Cements. Int J Clin Pediatr Dent 2016;9(3):197-200.
Collapse
Affiliation(s)
- Sidhant Pathak
- Postgraduate Student, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere, Karnataka, India
| | - K K Shashibhushan
- Professor, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere, Karnataka, India
| | - P Poornima
- Professor and Head, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere, Karnataka, India
| | - Vv Subba Reddy
- Professor, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere, Karnataka, India
| |
Collapse
|
57
|
Gillette C, Buck R, DuVall N, Cushen S, Wajdowicz M, Roberts H. Premolar Axial Wall Height Effect on CAD/CAM Crown Retention. Oper Dent 2016; 41:666-671. [PMID: 27820688 DOI: 10.2341/16-086-l] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the significance of reduced axial wall height on retention of adhesively luted, all-ceramic, lithium disilicate premolar computer-aided design/computer-aided manufacturing (CAD/CAM) crowns based on preparations with a near ideal total occlusal convergence of 10°. METHODS Forty-eight recently extracted premolars were randomly divided into four groups (n=12). Each group received all-ceramic CAD/CAM crown preparations featuring axial wall heights of 0, 1, 2, and 3 mm, respectively, all with a 10° total occlusal convergence. Scanned preparations were fitted with lithium disilicate all-ceramic crowns that were luted with a self-etching resin cement. Specimens were tested to failure at a 45° angle to the tooth long axis with failure load converted to megapascals (MPa) based on the measured bonding surface area. Mean data were analyzed using analysis of variance/Tukey's post hoc test (α=0.05). RESULTS Lithium disilicate crowns adhesively luted on preparations with 0 axial wall height demonstrated significantly less failure resistance compared with the crowns luted on preparations with axial wall heights of 1 to 3 mm. There was no failure stress difference between preparations with 1 to 3 mm axial wall height. CONCLUSIONS Under conditions of this study, adhesively luted lithium disilicate bicuspid crowns with a total occlusal convergence of 10° demonstrated similar failure resistance independent of axial wall height of 1 to 3 mm. This study provides some evidence that adhesion combined with an ideal total occlusal convergence may compensate for reduced axial wall height.
Collapse
|
58
|
Flury S, Schmidt SZ, Peutzfeldt A, Lussi A. Dentin bond strength of two resin-ceramic computer-aided design/computer-aided manufacturing (CAD/CAM) materials and five cements after six months storage. Dent Mater J 2016; 35:728-735. [PMID: 27546861 DOI: 10.4012/dmj.2016-095] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim was to investigate dentin bond strength of two resin-ceramic materials and five cements after 24 h and six months storage. Cylinders (n=15/group) of Lava Ultimate (3M ESPE) and VITA ENAMIC (VITA Zahnfabrik) were cemented to mid-coronal dentin of 300 extracted human molars with RelyX Ultimate (3M ESPE), PANAVIA F2.0 (Kuraray), Variolink II (Ivoclar Vivadent), els cem (Saremco Dental), or Ketac Cem Plus (3M ESPE). Shear bond strength (SBS) was measured after 24 h or six months storage (37°C, 100% humidity) and statistically analyzed (significance level: α=0.05). SBS varied markedly between Lava Ultimate and VITA ENAMIC, between the five cements, and between storage of either 24 h or six months. After six months, SBS was highest when Lava Ultimate was cemented with RelyX Ultimate and when VITA ENAMIC was cemented with RelyX Ultimate or with Variolink II. Lava Ultimate was somewhat more sensitive to storage than was VITA ENAMIC.
Collapse
Affiliation(s)
- Simon Flury
- Department of Preventive, Restorative, and Pediatric Dentistry, School of Dental Medicine, University of Bern
| | | | | | | |
Collapse
|
59
|
Kameyama A, Bonroy K, Elsen C, Lührs AK, Suyama Y, Peumans M, Van Meerbeek B, De Munck J. Luting of CAD/CAM ceramic inlays: direct composite versus dual-cure luting cement. Biomed Mater Eng 2016; 25:279-88. [PMID: 26407114 DOI: 10.3233/bme-151274] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this study was to investigate bonding effectiveness in direct restorations. A two-step self-etch adhesive and a light-cure resin composite was compared with luting with a conventional dual-cure resin cement and a two-step etch and rinse adhesive. Class-I box-type cavities were prepared. Identical ceramic inlays were designed and fabricated with a computer-aided design/computer-aided manufacturing (CAD/CAM) device. The inlays were seated with Clearfil SE Bond/Clearfil AP-X (Kuraray Medical) or ExciTE F DSC/Variolink II (Ivoclar Vivadent), each by two operators (five teeth per group). The inlays were stored in water for one week at 37°C, whereafter micro-tensile bond strength testing was conducted. The micro-tensile bond strength of the direct composite was significantly higher than that from conventional luting, and was independent of the operator (P<0.0001). Pre-testing failures were only observed with the conventional method. High-power light-curing of a direct composite may be a viable alternative to luting lithium disilicate glass-ceramic CAD/CAM restorations.
Collapse
Affiliation(s)
- Atsushi Kameyama
- KU Leuven BIOMAT, Department of Oral Health Sciences, Biomedical Sciences Group, KU Leuven (University of Leuven), Leuven, Belgium.,Division of General Dentistry, Department of Clinical Oral Health Science, Tokyo Dental College, Tokyo, Japan
| | - Kim Bonroy
- Section of Operative Dentistry, School of Dentistry, Oral Pathology and Maxillo-facial Surgery, KU Leuven (University of Leuven), Leuven, Belgium
| | - Caroline Elsen
- Section of Operative Dentistry, School of Dentistry, Oral Pathology and Maxillo-facial Surgery, KU Leuven (University of Leuven), Leuven, Belgium
| | - Anne-Katrin Lührs
- KU Leuven BIOMAT, Department of Oral Health Sciences, Biomedical Sciences Group, KU Leuven (University of Leuven), Leuven, Belgium.,Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School, Hannover, Germany
| | - Yuji Suyama
- KU Leuven BIOMAT, Department of Oral Health Sciences, Biomedical Sciences Group, KU Leuven (University of Leuven), Leuven, Belgium.,Department of Dentistry, Toranomon Hospital, Tokyo, Japan
| | - Marleen Peumans
- KU Leuven BIOMAT, Department of Oral Health Sciences, Biomedical Sciences Group, KU Leuven (University of Leuven), Leuven, Belgium
| | - Bart Van Meerbeek
- KU Leuven BIOMAT, Department of Oral Health Sciences, Biomedical Sciences Group, KU Leuven (University of Leuven), Leuven, Belgium
| | - Jan De Munck
- KU Leuven BIOMAT, Department of Oral Health Sciences, Biomedical Sciences Group, KU Leuven (University of Leuven), Leuven, Belgium
| |
Collapse
|
60
|
de Oliveira Ferraz LC, Ubaldini ALM, de Oliveira BMB, Neto AM, Sato F, Baesso ML, Pascotto RC. Analytical method to estimate resin cement diffusion into dentin. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:55003. [PMID: 27232592 DOI: 10.1117/1.jbo.21.5.055003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 04/27/2016] [Indexed: 06/05/2023]
Abstract
This study analyzed the diffusion of two resin luting agents (resin cements) into dentin, with the aim of presenting an analytical method for estimating the thickness of the diffusion zone. Class V cavities were prepared in the buccal and lingual surfaces of molars (n=9). Indirect composite inlays were luted into the cavities with either a self-adhesive or a self-etch resin cement. The teeth were sectioned bucco-lingually and the cement–dentin interface was analyzed by using micro-Raman spectroscopy (MRS) and scanning electron microscopy. Evolution of peak intensities of the Raman bands, collected from the functional groups corresponding to the resin monomer (C─O─C, 1113 cm(−1)) present in the cements, and the mineral content (P─O, 961 cm(−1)) in dentin were sigmoid shaped functions. A Boltzmann function (BF) was then fitted to the peaks encountered at 1113 cm(−1) to estimate the resin cement diffusion into dentin. The BF identified a resin cement–dentin diffusion zone of 1.8±0.4 μm for the self-adhesive cement and 2.5±0.3 μm for the self-etch cement. This analysis allowed the authors to estimate the diffusion of the resin cements into the dentin. Fitting the MRS data to the BF contributed to and is relevant for future studies of the adhesive interface.
Collapse
Affiliation(s)
| | - Adriana Lemos Mori Ubaldini
- State University of Maringá, Department of Dentistry, Av. Mandacaru 1550, 87080-0009, Maringá, Paraná, Brazil
| | | | - Antonio Medina Neto
- State University of Maringá, Department of Physics, Av. Colombo 5790, 87020-900, Maringá, Paraná, Brazil
| | - Fracielle Sato
- State University of Maringá, Department of Physics, Av. Colombo 5790, 87020-900, Maringá, Paraná, Brazil
| | - Mauro Luciano Baesso
- State University of Maringá, Department of Physics, Av. Colombo 5790, 87020-900, Maringá, Paraná, Brazil
| | - Renata Corrêa Pascotto
- State University of Maringá, Department of Dentistry, Av. Mandacaru 1550, 87080-0009, Maringá, Paraná, Brazil
| |
Collapse
|
61
|
Simões TC, Luque-Martinez ÍV, Moraes RR, Sá ATG, Loguercio AD, Moura SK. Longevity of Bonding of Self-adhesive Resin Cement to Dentin. Oper Dent 2016; 41:E64-72. [DOI: 10.2341/14-266-lr] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objective: To evaluate the effect of root dentin treatment on the bonding of self-adhesive resin cement after 24 hours and after 6 months.
Methods: A total of 48 single-rooted premolars were endodontically treated and divided into four groups (n=12): Adper Scotchbond Multi-Purpose + RelyX ARC (ARC); RelyX U200 (U200); EDTA + RelyX U200 (EU200); and phosphoric acid (H3PO4) + RelyX U200 (HU200). After filling the roots, an Exacto No. 2 fiber post was cleaned, treated with silane (60 seconds), positioned, and light cured (LED; 60 seconds at 1200 mW/cm2). After storage (37°C/24 h), the roots were cut to obtain two discs (1 mm) of each third. They were stored in distilled water (24 hours at 37°C); one disc of each root-third was subjected to the push-out test (0.5 mm/min) at 24 hours and the other disc after six months of water storage (37°C). The data on the root-thirds were averaged for statistical purposes. The average values of bond strength (MPa) were analyzed by two-way analysis of variance and post hoc Student-Newman-Keuls (5%).
Results: There were statistical differences for the treatment of dentin (p<0.001), for time (p=0.003), and the interaction of treatment and time (p=0.017). After 24 hours, we observed lower bond strength in the HU200 group when compared with other groups (ARC, U200, and EU200). After six months, HU200 showed the lowest bond strength. Higher strengths were observed for EU200 and U200 similarly, which were higher than ARC.
Conclusion: The bonding of the self-adhesive resin cement varied over time in the tested groups.
Collapse
Affiliation(s)
- TC Simões
- Tânia Christina Simões, DDS, MS, PhD, Restorative Dentistry, University North of Paraná, Londrina, Brazil
| | - ÍV Luque-Martinez
- Issis Virgínia Luque-Martinez, Dentistry Academic Unit, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - RR Moraes
- Rafael R de Moraes, DDS, MS, PhD, professor, Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - ATG Sá
- André Tomazini Gomes de Sá, PhD, professor, Prosthodontics, Federal Institute of Paraná, Londrina, Brazil
| | - AD Loguercio
- Alessandro D Loguercio, DDS, MS, PhD, professor, Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil
| | - SK Moura
- Sandra Kiss Moura, DDS, MDS, PhD, professor, Restorative Dentistry, University North of Paraná, Londrina, Brazil
| |
Collapse
|
62
|
Takamizawa T, Barkmeier WW, Latta MA, Berry TP, Tsujimoto A, Miyazaki M. Simulated Wear of Self-Adhesive Resin Cements. Oper Dent 2015; 41:327-38. [PMID: 26669501 DOI: 10.2341/14-227-l] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
One of the primary areas of concern with luting agents is marginal gap erosion and attrition. The purpose of this laboratory study was to evaluate bulk and marginal slit (gap) generalized wear of self-adhesive resin cements. Three self-adhesive resin cements were used in this study: G-CEM LinkAce (LA), Maxcem Elite (ME), and RelyX Unicem2 Automix (RU). A custom stainless-steel fixture with a cavity 4.5 mm in diameter and 4 mm deep was used for simulated generalized (bulk) wear. For simulated marginal gap wear, a two-piece stainless-steel custom fixture was designed with a slit (gap) 300 μm wide and 3 mm in length. For both wear models, 20 specimens each for each of the three adhesive cements were made for both light-cure and chemical-cure techniques. The cured cements were polished with a series of carbide papers to a 4000-grit surface and subjected to 100,000 cycles using the slit (gap) wear model and 400,000 cycles for generalized (bulk) wear in a Leinfelder-Suzuki (Alabama machine) wear simulator (maximum load of 78.5 N). Flat-ended stainless-steel antagonists were used in a water slurry of poly(methylmethacrylate) beads for simulation of generalized contact-free area wear with both wear models. Before and after the wear challenges, the specimens were profiled with a Proscan 2100 noncontact profilometer, and wear (volume loss [VL] and mean facet depth [FD]) was determined using AnSur 3D software. Two-way analysis of variance (ANOVA) and Tukey post hoc tests were used for data analysis for the two wear models. Scanning electron microscopy (SEM) was used to examine polished surfaces of the resin cements and the worn surfaces after the wear challenges. The two-way ANOVA of VL using the generalized (bulk) wear model showed a significant effect among the three resin cement materials for the factor of resin cement (p<0.001) and the interaction of the cement and cure method (p<0.001), but not for the cure method (p=0.465). The two-way ANOVA for FD also found a significant difference for the factor of resin cement (p<0.001) and the interaction of the resin cement and cure method (p<0.001), but not for the cure method (p=0.277). The simulated generalized (bulk) wear for the light-cure groups was as follows: VL (mm(3)): RU 0.631 (0.094), LA 0.692 (0.112), and ME 1.046 (0.141) and FD (μm): RU 43.6 (6.5), LA 47.0 (7.7), and ME 72.5 (9.9). The simulated generalized (bulk) wear for the chemical-cure groups was as follows: VL (mm(3)): LA 0.741 (0.105), RU 1.231 (0.234), and ME 1.305 (0.143) and FD (μm): LA 50.7 (7.2), RU 84.5 (16.1), and ME 91.7 (10.2). Simulated wear using the slit (gap) model for the light-cure groups was as follows: VL (mm(3)): RU 0.030 (0.006), LA 0.031 (0.006), and ME 0.041 (0.009) and FD (μm): RU 49.6 (5.7), LA 57.2 (8.4), and ME 70.9 (10.7). The wear values for the chemical-cure slit (gap) groups were as follows: VL (mm(3)): LA 0.031 (0.004), ME 0.038 (0.007), and RU 0.045 (0.009) and FD (μm): LA 53.9 (6.7), ME 63.5 (9.1), and RU 74.2 (12.9). Pearson correlation tests revealed a strong relationship between the two wear models for the light-cure groups and a good relationship for the chemical-cure groups. The observations using SEM showed differences in filler particle shape and size among the cements and the resultant effect of the wear challenges. The worn surfaces of each cement were essentially the same for both light-cure and chemical-cure methods. The bulk wear model and new slit (gap) model for evaluation of simulated generalized wear of luting agents demonstrated significant differences (p<0.05) in relative wear among three self-adhesive resin cements and between visible light- and chemical-cure techniques.
Collapse
|
63
|
Bitter K, Schubert A, Neumann K, Blunck U, Sterzenbach G, Rüttermann S. Are self-adhesive resin cements suitable as core build-up materials? Analyses of maximum load capability, margin integrity, and physical properties. Clin Oral Investig 2015; 20:1337-45. [PMID: 26445856 DOI: 10.1007/s00784-015-1623-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 09/28/2015] [Indexed: 01/01/2023]
Abstract
OBJECTIVES The aim of the present study was to test a self-adhesive resin cement used as core build-up material in comparison to two commercially available core build-up materials. MATERIALS AND METHODS Forty human anterior teeth were endodontically treated and fiber post insertion (RelyX Fiber posts) and core build-ups were performed using two core build-up materials applied with an etch-and-rinse adhesive approach (Luxacore Dual-LC and Clearfil Core-CC) and an experimental self-adhesive resin cement (SAR) in two application modes (SAR Handmix and SAR Automix). Samples were subjected to thermo-mechanical loading. Margin integrity was determined using scanning electron microscopy (SEM), and maximum load capability (Fmax) was evaluated. Physical properties of the tested materials were also examined. RESULTS Fmax was significantly affected by the core build-up material (p < 0.0005; one-way ANOVA). CC [481 (158) N] revealed significantly higher Fmax compared to LC [226 (80) N], SAR Hand [205 (115), and SAR Automix [197 (134) N] (p < 0.05; Tukey-B). The percentage of margin quality "continuous margin" in enamel after thermo-mechanical loading (TML) differed significantly among groups (p < 0.0005; Kruskal-Wallis); CC demonstrated a significantly higher percentage of margin quality "continuous margin" compared to the other groups. Physical properties were significantly affected by the different core materials (p < 0.0005; ANOVA); CC and LC demonstrated significantly higher flexural strength compared to both SAR groups as well as significantly higher water sorption of both SAR groups compared to CC and LC. CONCLUSION Within the limitations of the present in vitro study, we conclude that the investigated experimental self-adhesive resin cement is not suitable as a core build-up material due to the lower maximum load capability, low margin quality, and the data of the mechanical properties. CLINICAL RELEVANCE The investigated experimental self-adhesive resin cement cannot be recommended as a core build-up material.
Collapse
Affiliation(s)
- Kerstin Bitter
- Department of Operative and Preventive Dentistry, CharitéCentrum 3, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197, Berlin, Germany.
| | - Anne Schubert
- Department of Orthodontics, Dentofacial Orthopedics and Pedodontics, CharitéCentrum 3, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Konrad Neumann
- Department of Medical Informatics, Biometry and Epidemiology, CharitéCentrum 4, Charité - Universitätsmedizin Berlin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Uwe Blunck
- Department of Operative and Preventive Dentistry, CharitéCentrum 3, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Guido Sterzenbach
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, CharitéCentrum 3, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Stefan Rüttermann
- Department of Operative Dentistry, Center for Dentistry and Oral Medicine (Carolinum), Goethe-University Frankfurt, Theodor-Stern-Kai 7, 60598, Frankfurt a. M, Germany
| |
Collapse
|
64
|
Ab-Ghani Z, Jaafar W, Foo SF, Ariffin Z, Mohamad D. Shear bond strength of computer-aided design and computer-aided manufacturing feldspathic and nano resin ceramics blocks cemented with three different generations of resin cement. J Conserv Dent 2015; 18:355-9. [PMID: 26430296 PMCID: PMC4578177 DOI: 10.4103/0972-0707.164028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Aim: To evaluate the shear bond strength between the dentin substrate and computer-aided design and computer-aided manufacturing feldspathic ceramic and nano resin ceramics blocks cemented with resin cement. Materials and Methods: Sixty cuboidal blocks (5 mm × 5 mm × 5 mm) were fabricated in equal numbers from feldspathic ceramic CEREC® Blocs PC and nano resin ceramic Lava™ Ultimate, and randomly divided into six groups (n = 10). Each block was cemented to the dentin of 60 extracted human premolar using Variolink® II/Syntac Classic (multi-steps etch-and-rinse adhesive bonding), NX3 Nexus® (two-steps etch-and-rinse adhesive bonding) and RelyX™ U200 self-adhesive cement. All specimens were thermocycled, and shear bond strength testing was done using the universal testing machine at a crosshead speed of 1.0 mm/min. Data were analyzed using one-way ANOVA. Results: Combination of CEREC® Blocs PC and Variolink® II showed the highest mean shear bond strength (8.71 Mpa), while the lowest of 2.06 Mpa were observed in Lava™ Ultimate and RelyX™ U200. There was no significant difference in the mean shear bond strength between different blocks. Conclusion: Variolink® II cement using multi-steps etch-and-rinse adhesive bonding provided a higher shear bond strength than the self-adhesive cement RelyX U200. The shear bond strength was not affected by the type of blocks used.
Collapse
Affiliation(s)
- Zuryati Ab-Ghani
- Department of Prosthodontic, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Wahyuni Jaafar
- Department of Prosthodontic, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Siew Fon Foo
- Department of Prosthodontic, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Zaihan Ariffin
- Department of Prosthodontic, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Dasmawati Mohamad
- Department of Biomaterials, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| |
Collapse
|
65
|
Aygün Emiroğlu Ş, Evren B, Kulak Özkan Y. Effect of Cements at Different Temperatures on the Clinical Performance and Marginal Adaptation of Inlay-Onlay Restorations In Vivo. J Prosthodont 2015. [DOI: 10.1111/jopr.12311] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
| | - Buket Evren
- Department of Prosthetic Dentistry; University of Marmara; Istanbul Turkey
| | | |
Collapse
|
66
|
Mohamed MF, El Deeb HA, Gomaa IE, Mobarak EH. Bond Durability of Different Resin Cements to Caries-Affected Dentin Under Simulated Intrapulpal Pressure. Oper Dent 2015; 40:293-303. [DOI: 10.2341/14-035-l] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objective:
To evaluate the durability of the bond of different resin cement systems to normal dentin (ND) and caries-affected dentin (CAD) with and without simulated intrapulpal pressure (IPP).
Methods and Materials
Molars with midcoronal caries were used. Occlusal enamel was cut to expose both dentin substrates (ND and CAD). Dentin substrates were differentiated using visual, tactile, caries-detecting dye, and dye-permeability methods. Prepared crown segments were equally divided according to the tested resin cement systems: etch-and-rinse resin cement, self-etch resin cement containing methacryloyloxydecyl dihydrogen phosphate (MDP), and self-adhesive resin cement. In addition to the dentin substrates and the resin cement types, the effect of application/storage conditions (with or without simulated IPP and with or without thermocycling) were tested. A microtensile bond strength test was done using a universal testing machine. Failure modes were determined using a scanning electron microscope.
Results
Etch-and-rinse resin cement strength values were significantly affected by the difference in the dentin substrates as well as the different application/storage conditions. Self-etch adhesive containing MDP bonded equally to ND and CAD and remained stable under all tested conditions. Self-adhesive resin cement revealed a similar bond to ND and CAD; however, its values were the lowest, especially when IPP and thermocycling were combined. Mixed failure was the predominant failure mode.
Conclusions
Etch-and-rinse resin cement was sensitive to dentin substrate and application/storage conditions. Resin cement with self-etch adhesive containing MDP revealed more reliable bonding to ND/CAD even when IPP and thermocycling were combined. The bonding of the self-adhesive resin cement could not compete with other resin cements.
Collapse
Affiliation(s)
- MF Mohamed
- Mona F Mohamed, Operative Dentistry, Modern Science and Arts University, 6th October City, Egypt
| | - HA El Deeb
- Heba A El Deeb, Restorative Dentistry Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| | - IE Gomaa
- Iman E Gomaa, Department of Pharmaceutical Biology and Biotechnology, German University in Cairo–GUC, Cairo, Egypt
| | - EH Mobarak
- Enas H Mobarak, Restorative Dentistry Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| |
Collapse
|
67
|
Huettig F, Prutscher A, Goldammer C, Kreutzer CA, Weber H. First clinical experiences with CAD/CAM-fabricated PMMA-based fixed dental prostheses as long-term temporaries. Clin Oral Investig 2015; 20:161-8. [PMID: 25898895 DOI: 10.1007/s00784-015-1475-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 04/09/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The clinical performance of polymethylmethacrylate (PMMA)-based fixed dental prostheses (FDP) was evaluated in the indication of long-term temporaries. MATERIALS AND METHODS In the current indication of the applied machinable PMMA-based material (Vita CAD-Temp), i.e. temporary crowns and FDPs, 27 patients with compromised dentitions (uncertain dental prognosis or postponement of a removable treatment option) were recruited and 45 FDPs (3 or 4 units, 37 terminal-retained, 8 cantilevered) were inserted. Frameworks were computer-aided design (CAD)/computer-aided manufacturing (CAM)-manufactured after conventional impression taking and labside scanning of stone master casts. A resin-modified hybrid cement material (RelyX Unicem) was used for luting in a conventional protocol. Clinical follow-up was performed biannually. RESULTS Over an observation time from 2 to 26 months (median 13 months), 11 complications were found in 9 out of 45 PMMA restorations: 4 losses of retention, 5 complete fractures; two of these subsequent to a trepanation for endodontic treatment. Thereby, 3 out of 8 cantilevered FDPs had to be removed within 8 months. Thus, the statistical evaluation included FDPs with abutment at end, only. These standard design FDPs (n = 37) showed a 90.4 % survival rate with a complication-free rate of 88.3 % estimated for an observation time of 16 months. CONCLUSION Cantilevered FDPs and reconstructions on abutment teeth with markedly reduced biological prognosis or endodontic intervention yielded a high-failure rate. Terminal-retained FDPs performed clinically well in cases without compromised abutment teeth. CLINICAL RELEVANCE PMMA-based material might be used successfully for long-term temporization with 3- to 4-unit FDPs in a standard design over at least one year.
Collapse
Affiliation(s)
- Fabian Huettig
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany.
| | - Andreas Prutscher
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
| | - Christoph Goldammer
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
| | - Curt A Kreutzer
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
| | - Heiner Weber
- Department of Prosthodontics with Section "Medical Materials and Technology" at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Osianderstr. 2-8, 72076, Tübingen, Germany
| |
Collapse
|
68
|
Three-dimensional finite element analysis of anterior two-unit cantilever resin-bonded fixed dental prostheses. ScientificWorldJournal 2015; 2015:864389. [PMID: 25879077 PMCID: PMC4387912 DOI: 10.1155/2015/864389] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 08/21/2014] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the influence of different framework materials on biomechanical behaviour of anterior two-unit cantilever resin-bonded fixed dental prostheses (RBFDPs). A three-dimensional finite element model of a two-unit cantilever RBFDP replacing a maxillary lateral incisor was created. Five framework materials were evaluated: direct fibre-reinforced composite (FRC-Z250), indirect fibre-reinforced composite (FRC-ES), gold alloy (M), glass ceramic (GC), and zirconia (ZI). Finite element analysis was performed and stress distribution was evaluated. A similar stress pattern, with stress concentrations in the connector area, was observed in RBFDPs for all materials. Maximal principal stress showed a decreasing order: ZI > M > GC > FRC-ES > FRC-Z250. The maximum displacement of RBFDPs was higher for FRC-Z250 and FRC-ES than for M, GC, and ZI. FE analysis depicted differences in location of the maximum stress at the luting cement interface between materials. For FRC-Z250 and FRC-ES, the maximum stress was located in the upper part of the proximal area of the retainer, whereas, for M, GC, and ZI, the maximum stress was located at the cervical outline of the retainer. The present study revealed differences in biomechanical behaviour between all RBFDPs. The general observation was that a RBFDP made of FRC provided a more favourable stress distribution.
Collapse
|
69
|
Okulus Z, Strzemiecka B, Czarnecka B, Buchwald T, Voelkel A. Surface energy of bovine dentin and enamel by means of inverse gas chromatography. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:382-389. [DOI: 10.1016/j.msec.2015.01.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 12/18/2014] [Accepted: 01/06/2015] [Indexed: 10/24/2022]
|
70
|
Rodrigues RF, Ramos CM, Francisconi PA, Borges AFS. The shear bond strength of self-adhesive resin cements to dentin and enamel: An in vitro study. J Prosthet Dent 2015; 113:220-7. [DOI: 10.1016/j.prosdent.2014.08.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 08/11/2014] [Accepted: 08/12/2014] [Indexed: 11/29/2022]
|
71
|
da Silva MB, Tavarez RRDJ, de Assis FS, Tonetto MR, Neto TP, Bhandi SH, El-Mowafy O, Porto Neto SDT, Bandeca MC. The Effect of Self-adhesive and Self-etching Resin Cements on the Bond Strength of Nonmetallic Posts in Different Root Thirds. J Contemp Dent Pract 2015; 16:147-153. [PMID: 25906807 DOI: 10.5005/jp-journals-10024-1652] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE The purpose of this study was to evaluate the effect of self-adhesive and self-etching resin cements on the bond strength of nonmetallic posts in different root regions. MATERIALS AND METHODS Sixty single-rooted human teeth were decoronated, endodontically treated, post-space prepared, and divided into six groups. Glass-fiber (GF) posts (Exacto, Angelus) and fiber-reinforced composite (FRC) posts (EverStick, StickTeck) were cemented with self-adhesive resin cement (Breeze) (SA) (Pentral Clinical) and self-etching resin cement (Panavia-F) (SE) (Kuraray). Six 1-mm-thick rods were obtained from the cervical (C), middle (M), and apical (A) regions of the roots. The specimens were then subjected to microtensile testing in a special machine (BISCO; Schaumburg, IL, USA) at a crosshead speed of 0.5 mm/min. Microtensile bond strength data were analyzed with two-way ANOVA and Tukey's tests. RESULTS Means (and SD) of the MPa were: GF/SA/C: 14.32 (2.84), GF/SA/M: 10.69 (2.72), GF/SA/A: 6.77 (2.17), GF/SE/C: 11.56 (4.13), GF/SE/M: 6.49 (2.54), GF/SE/A: 3.60 (1.29), FRC/SA/C: 16.89 (2.66), FRC/SA/M: 13.18 (2.19), FRC/SA/A: 8.45 (1.77), FRC/SE/C: 13.69 (3.26), FRC/SE/M: 9.58 (2.23), FRC/SE/A: 5.62 (2.12). The difference among the regions was statistically significant for all groups (p < 0.05). The self-adhesive resin cement showed better results than the self-etching resin cement when compared to each post (p < 0.05). No statistically significant differences in bond strengths of the resin cements when comparable to each post (p > 0.05). CONCLUSION The bond strength values were significantly affected by the resin cement and the highest values were found for self-adhesive resin cement.
Collapse
Affiliation(s)
| | | | - Fernanda Silva de Assis
- Department of Postgraduate Program in Integrated Dental Sciences, University of Cuiabá, Mato Grosso, Cuiabá
| | - Mateus Rodrigues Tonetto
- Department of Postgraduate Program in Integrated Dental Sciences, University of Cuiabá, Mato Grosso, Cuiabá
| | - Thiago Porto Neto
- Department of Restorative Dentistry, School of Dentistry, UNESP - São Paulo State University, Araraquara, São Pãulo, Brazil
| | - Shilpa H Bhandi
- Department of Conservative Dentistry and Endodontics, MS Ramaiah Dental College and Hospital, Bengaluru, Karnataka, India
| | - Omar El-Mowafy
- Department of Restorative Dentistry, University of Toronto, Toronto, Canada
| | - Sizenando de Toledo Porto Neto
- Department of Restorative Dentistry, School of Dentistry, UNESP - São Paulo State University, Araraquara, São Pãulo, Brazil
| | - Matheus Coelho Bandeca
- Head Postgraduate Program in Dentistry, Department of Dentistry, CEUMA University, Rua Josue Montello, N 01, Renascença, São Luis, Maranhão 84035-210, Brazil, e-mail:
| |
Collapse
|
72
|
Hattar S, Hatamleh MM, Sawair F, Al-Rabab'ah M. Bond strength of self-adhesive resin cements to tooth structure. Saudi Dent J 2015; 27:70-4. [PMID: 26082572 PMCID: PMC4459118 DOI: 10.1016/j.sdentj.2014.11.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 10/26/2014] [Accepted: 11/04/2014] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVES The aim of this study was to evaluate the strength of the bond between newly introduced self-adhesive resin cements and tooth structures (i.e., enamel and dentin). METHODS Three self-adhesive cements (SmartCem2, RelyX Unicem, seT SDI) were tested. Cylindrical-shaped cement specimens (diameter, 3 mm; height, 3 mm) were bonded to enamel and dentin. Test specimens were incubated at 37 °C for 24 h. The shear bond strength (SBS) was tested in a Zwick Roll testing machine. Results were analyzed by one-way ANOVA and t-test. Statistically significant differences were defined at the α = 0.05 level. Bond failures were categorized as adhesive, cohesive, or mixed. RESULTS The SBS values ranged from 3.76 to 6.81 MPa for cements bonded to enamel and from 4.48 to 5.94 MPa for cements bonded to dentin (p > 0.05 between surfaces). There were no statistically significant differences between the SBS values to enamel versus dentin for any given cement type. All cements exhibited adhesive failure at the resin/tooth interface. CONCLUSIONS Regardless of their clinical simplicity, the self-adhesive resin cements examined in this study exhibit limited bond performance to tooth structures; therefore, these cements must be used with caution.
Collapse
Affiliation(s)
- Susan Hattar
- Faculty of Dentistry, The University of Jordan, Amman 11942, Jordan
| | - Muhanad M Hatamleh
- Department of Oral and Maxillofacial Surgery, King's College Hospital, London, UK ; Faculty of Applied Medical Sciences, Jordan University of Science and Technology, Irbid, Jordan
| | - Faleh Sawair
- Faculty of Dentistry, The University of Jordan, Amman 11942, Jordan
| | | |
Collapse
|
73
|
Voelkel A, Strzemiecka B, Milczewska K, Okulus Z. Inverse Gas Chromatographic Examination of Polymer Composites. OPEN CHEM 2015. [DOI: 10.1515/chem-2015-0104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractInverse gas chromatographic characterization of resins and resin based abrasive materials, polymerpolymer and polymer-filler systems, as well as dental restoratives is reviewed.
Collapse
|
74
|
Adhesive strength of self-adhesive resins to lithium disilicate ceramic and dentin: effect of dentin chelating agents. Odontology 2014; 104:53-9. [DOI: 10.1007/s10266-014-0180-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Accepted: 09/26/2014] [Indexed: 11/27/2022]
|
75
|
Costa LA, Carneiro KK, Tanaka A, Lima DM, Bauer J. Evaluation of pH, ultimate tensile strength, and micro-shear bond strength of two self-adhesive resin cements. Braz Oral Res 2014; 28:1-7. [PMID: 25337932 DOI: 10.1590/1807-3107bor-2014.vol28.0055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 06/24/2014] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the pH, ultimate tensile strength (UTS), and micro-shear bond strength (µSBS) of two self-adhesive resin cements to enamel and dentin. Sound bovine incisors (n = 10) and two self-adhesive resin cements (i.e., RelyX U-100 and seT PP) were used. The pH of the resin cements was measured using a pH-indicator paper (n = 3). Specimens for UTS were obtained from an hourglass-shaped mold. For µSBS, cylinders with internal diameter of 0.75 mm and height of 0.5 mm were bonded to the flat enamel and dentin surfaces. Bonded cylinders were tested in the shear mode using a loop wire. The fracture mode was also evaluated. The cement seT PP showed a low pH; U-100 showed significantly higher UTS (49.9 ± 2.0) than seT PP (40.0 ± 2.1) (p < 0.05) and high µSBS to enamel (10.7 ± 3.7). The lowest µSBS was found for seT PP to dentin (0.7 ± 0.6); seT PP to enamel (4.8 ± 1.7), and for U-100 to dentin (7.2 ± 1.9), showing an intermediate µSBS value (p < 0.05). Adhesive failure was the most frequently observed failure mode. The resin cement that presented the lowest pH and UTS also presented the lowest micro-shear bond strength to enamel and dentin.
Collapse
Affiliation(s)
- Luciana Artioli Costa
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - Karina Kato Carneiro
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - Auro Tanaka
- Department of Chemistry, Center of Sciences and Technology, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - Darlon Martins Lima
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - José Bauer
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
| |
Collapse
|
76
|
Mechanical properties of components of the bonding interface in different regions of radicular dentin surfaces. J Prosthet Dent 2014; 113:54-61. [PMID: 25277035 DOI: 10.1016/j.prosdent.2014.07.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 07/22/2014] [Accepted: 07/24/2014] [Indexed: 11/21/2022]
Abstract
STATEMENT OF PROBLEM The mechanical properties of the adhesive materials used in intraradicular treatments could vary according to the interaction between the restorative material and dentin substrate. An evaluation of these properties is essential to determine the success of the luting procedures performed on glass-fiber posts. PURPOSE The purpose of this study was to evaluate the mechanical properties of dentin adhesives, resin cements, and the dentin that underlies the bonding interface in different thirds of intraradicular dentin. MATERIAL AND METHODS Forty extracted, single-rooted human teeth were used in this study. After the endodontic treatment of the post spaces, the teeth were divided into 5 groups (n=8): Adper Single Bond 2 + RelyX ARC, Excite DSC + RelyX ARC, Adper SE Plus + RelyX ARC, RelyX Unicem, and Set. The hardness and elastic modulus values were measured at the adhesive interface in different thirds of the radicular dentin by using an ultramicrohardness tester. The data were subjected to 2-way ANOVA and the Fisher protected least significant difference test (α=.05). RESULTS In the underlying dentin, the highest Martens hardness values were found in the apical region for all groups; the exceptions were the groups with the self-etching adhesive. In the adhesive layer, the highest Martens hardness values were obtained for the Adper SE Plus + RelyX ARC group; further, no statistical differences were found among the different regions for this group. RelyX ARC had the lowest Martens hardness and elastic modulus values in the apical regions when used with Adper Single Bond 2 and Adper SE Plus. No differences were found in the Martens hardness and elastic modulus values for the self-adhesive resin cement in the regions investigated. CONCLUSION The mechanical properties of adhesive materials and the underlying dentin are influenced by the interaction between the two as well as by the depth of the analyzed intraradicular area.
Collapse
|
77
|
de Rosatto CMP, Roscoe MG, Novais VR, Menezes MDS, Soares CJ. Effect of silane type and air-drying temperature on bonding fiber post to composite core and resin cement. Braz Dent J 2014; 25:217-24. [PMID: 25252257 DOI: 10.1590/0103-6440201300005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 06/17/2014] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the influence of silane type and temperature of silane application on push-out bond strength between fiberglass posts with composite resin core and resin cement. One hundred and sixty fiberglass posts (Exacto, Angelus) had the surface treated with hydrogen peroxide 24%. Posts were divided in 8 groups according to two study factors: air-drying temperature after silane application (room temperature and 60 ºC) and silane type: three pre-hydrolyzed--Silano (Angelus), Prosil (FGM), RelyX Ceramic Primer (3M ESPE) and one two-component silane--Silane Coupling Agent (Dentsply). The posts (n=10) for testing the bond strength between post and composite core were centered on a cylindrical plastic matrix and composite resin (Filtek Z250 XT, 3M ESPE) that was incrementally inserted and photoactivated. Eighty bovine incisor roots (n=10) were prepared for testing the bond strength between post and resin cement (RelyX U100, 3M ESPE) and received the fiberglass posts. Push-out test was used to measure the bond strength. Data were analyzed by two-way ANOVA followed by Tukey's test (α=0.05). ANOVA revealed that temperature and silane had no influence on bond strength between composite core and post. However, for bond strength between post and resin cement, the temperature increase resulted in a better performance for Silane Coupling Agent, Silano and RelyX Ceramic Primer. At room temperature Silane Coupling Agent showed the lowest bond strength. Effect of the warm air-drying is dependent on the silane composition. In conclusion, the use of silane is influenced by wettability of resinous materials and pre-hydrolyzed silanes are more stable compared with the two-bottle silane.
Collapse
Affiliation(s)
- Camila Maria Peres de Rosatto
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Marina Guimarães Roscoe
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Veridiana Resende Novais
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Murilo de Sousa Menezes
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Carlos José Soares
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| |
Collapse
|
78
|
In vitro compressive fracture resistance of human maxillary first premolar with different mesial occlusal distal cavity. J Dent Sci 2014. [DOI: 10.1016/j.jds.2014.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
79
|
Weiser F, Behr M. Self-Adhesive Resin Cements: A Clinical Review. J Prosthodont 2014; 24:100-8. [DOI: 10.1111/jopr.12192] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2014] [Indexed: 11/29/2022] Open
Affiliation(s)
| | - Michael Behr
- Department of Prosthetic Dentistry; University Medical Center Regensburg; Regensburg Germany
| |
Collapse
|
80
|
Lin CL, Kuo WC, Chang YH, Yu JJ, Lin YC. Examination of ceramic/enamel interfacial debonding using acoustic emission and optical coherence tomography. Dent Mater 2014; 30:910-6. [PMID: 24958691 DOI: 10.1016/j.dental.2014.05.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 04/04/2014] [Accepted: 05/21/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE This study investigates monitored micro-crack growth and damage in the ceramic/enamel adhesive interface using the acoustic emission (AE) technique with optical coherence tomography (OCT) under fatigue shear testing. METHODS Shear bond strength (SBS) was measured first with eight prepared ceramic/enamel adhesive specimens under static loads. The fatigue shear testing was performed with three specimens at each cyclic load according to a modified ISO14801 method, applying at 80%, 75%, 70%, and 65% of the SBS to monitor interface debonding. The number of cycles at each load was recorded until ceramic/enamel adhesive interface debonding occurred. The AE technique was used to detect micro-crack signals in static and fatigue shear bond tests. RESULTS The results showed that the average SBS value in the static tests was 18.07 ± 1.72 MPa (mean ± standard deviation), expressed in Newton's at 56.77 ± 5.40N. The average number of fatigue cycles in which ceramic/enamel interface damage was detected in 80%, 75%, 70% and 65% of the SBS were 41, 410, 8141 and 76,541, respectively. The acoustic behavior varied according to the applied load level. Events were emitted during 65% and 70% fatigue tests. A good correlation was observed between the crack location in OCT images and the number of AE signal hits. SIGNIFICANCE The AE technique combined with OCT images as a pre-clinical assessment tool to determine the integrity of cemented load bearing restored ceramic material. Sustainable cyclic load stresses in ceramic/enamel bonded specimens were substantially lower than the measured SBS. Predicted S-N curve showed that the maximum endured load was 10.98 MPa (about 34.48 N) passing 10(6) fatigue cyclic.
Collapse
Affiliation(s)
- Chun-Li Lin
- Department of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan.
| | - Wen-Chuan Kuo
- Institute of Biophotonics, National Yang-Ming University, Taipei, Taiwan.
| | - Yen-Hsiang Chang
- Department of General Dentistry, Chang Gung Memorial Hospital, Tao-yuan, Taiwan.
| | - Jin-Jie Yu
- Department of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan.
| | - Yun-Chu Lin
- Department of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan.
| |
Collapse
|
81
|
Neves AA, Jaecques S, Van Ende A, Cardoso MV, Coutinho E, Lührs AK, Zicari F, Van Meerbeek B. 3D-microleakage assessment of adhesive interfaces: exploratory findings by μCT. Dent Mater 2014; 30:799-807. [PMID: 24908617 DOI: 10.1016/j.dental.2014.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 03/18/2014] [Accepted: 05/08/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVES To explore the feasibility of a 3D-microleakage protocol for the evaluation of various configurations of adhesive-tooth interfaces. METHODS Three different kinds of specimens were prepared: (1) a Class-I composite restoration placed without any bonding to maximize gap formation at the interface; (2) a glass-fiber post cemented with a self-adhesive composite cement into a prepared root canal; and (3) inlay MOD composite restorations placed with either a 1-step self-adhesive or a 2-step etch-and-rinse composite cement. After silver-nitrate (AgNO3) infiltration, the specimens were scanned using a Skyscan 1172 X-ray microtomograph (μCT; Skyscan Bruker) at 100kV, 100μA and 7.8-9.5μm resolution. Projection images were reconstructed, after which maximum-intensity projections (MIPs) and 3D-volumetric renderings were produced. For the inlays, an additional conventional stereomicroscopic (SM) microleakage evaluation was accomplished after specimen sectioning. RESULTS MIPs and 3D-renderings from specimens (1) and (2) revealed strongly varying microleakage patterns along the marginal gap/interface. For the specimens of setup (3), the high radiopacity of the 2-step composite cement hindered evaluation of the MIPs. MIP-microleakage patterns along the enamel margin of the restoration cemented with the 1-step composite cement corresponded well to the stereomicroscopic images. SIGNIFICANCE The reported μCT-protocol revealed good sensitivity to detect AgNO3 infiltration at the adhesive-tooth interface when considerable microleakage was present. When microleakage was less apparent and spread in a more diffuse pattern, evaluation with μCT was less sensitive compared to stereomicroscopic evaluation.
Collapse
Affiliation(s)
- Aline A Neves
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium; School of Health Sciences, Grande Rio University (UNIGRANRIO), Brazil
| | - Siegfried Jaecques
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium; Leuven Medical Technology Centre (LMTC), Division of Biomechanics and Engineering Design, KU Leuven (University of Leuven), Belgium
| | - Annelies Van Ende
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium
| | - Marcio Vivan Cardoso
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium
| | - Eduardo Coutinho
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium; School of Dentistry, Fluminense Federal University, Brazil
| | - Anne-Katrin Lührs
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium; Klinik für Zahnerhaltung, Parodontologie und Präventive Zahnheilkunde, Medizinische Hochschule Hannover, Germany
| | - Francesca Zicari
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium; Department of Prosthetic Dentistry, Alma Mater Studiorum, University of Bologna, Italy
| | - Bart Van Meerbeek
- KU Leuven - BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Belgium.
| |
Collapse
|
82
|
Damage of lithium-disilicate all-ceramic restorations by an experimental self-adhesive resin cement used as core build-ups. Clin Oral Investig 2014; 19:281-8. [PMID: 24867231 DOI: 10.1007/s00784-014-1263-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 05/16/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVES This in vitro study aimed to predict the potential of fracture initiation after long-term incubation (LTI) of lithium-disilicate restorations due to a hygroscopic expansion of self-adhesive resin cement (SARC) used as core build-up material. METHODS Human maxillary central incisors were divided into four groups (n = 10). Teeth were endodontically treated and decoronated. Specimens were restored in a one-stage post-and-core procedure using experimental dual-curing SARC. Three application protocols to build up the core were compared as follows: I, auto-polymerisation; II, dual curing including 40 s light-initiated polymerisation; and III, an open matrix technique in a dual-curing mode. In group IV, a chemical-curing composite core build-up material served as control. For all specimens, a 2-mm ferrule design was ensured. Full anatomic lithium-disilicate crowns were adhesively luted. One-year LTI in 0.5 % chloramine solution at 37 °C was performed. Restorations were examined after 3, 6, 9 and 12 month of storage. Survival rates were calculated using log-rank statistics (p = 0.05). RESULTS Fifty per cent of lithium-disilicate crowns of groups I and II showed visible crack propagation after 9 months of incubation, while one crown failed in group III. No failure was observed in group IV. The survival rates differed significantly (p = 0.017). CONCLUSION SARC used to build up the core of severely damaged endodontically treated teeth does have the potential to cause fracture of lithium-disilicate crown restorations. CLINICAL RELEVANCE Hygroscopic expansion of self-adhesive resin cements used as a core build-up material might have an adverse impact on longevity of glass-ceramic crowns.
Collapse
|
83
|
Aguiar TR, André CB, Correr-Sobrinho L, Arrais CA, Ambrosano GM, Giannini M. Effect of storage times and mechanical load cycling on dentin bond strength of conventional and self-adhesive resin luting cements. J Prosthet Dent 2014; 111:404-10. [PMID: 24355507 DOI: 10.1016/j.prosdent.2013.07.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 07/17/2013] [Accepted: 07/18/2013] [Indexed: 10/25/2022]
|
84
|
Saker S, El-Kholany N, Sakrana A, Maria OM. WITHDRAWN: Effect of different dentin cleaning techniques on bond strength and the micromorphology of dentin/self-adhesive resin cement interface. J Prosthet Dent 2014:S0022-3913(14)00107-3. [PMID: 24795264 DOI: 10.1016/j.prosdent.2013.12.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 12/17/2013] [Accepted: 12/28/2013] [Indexed: 11/26/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
Collapse
Affiliation(s)
- Samah Saker
- Assistant Professor, Department of Conservative Dentistry and Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Naglaa El-Kholany
- Assistant Professor, Department of Conservative Dentistry and Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Amal Sakrana
- Associate Professor, Department of Conservative Dentistry and Fixed Prosthodontics, Faculty of Dentistry, Mansoura University; Department of Fixed Prosthodontics, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Kingdom of Saudi Arabia
| | - Ola M Maria
- Assistant Professor, Oral Biology Department, Faculty of Dentistry, Mansoura University, Egypt; Postdoctoral Fellow, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| |
Collapse
|
85
|
Khoroushi M, Kachuei M. Pull-out bond strength of a self-adhesive resin cement to NaOCl-treated root dentin: effect of antioxidizing agents. Restor Dent Endod 2014; 39:95-103. [PMID: 24790921 PMCID: PMC3978110 DOI: 10.5395/rde.2014.39.2.95] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Accepted: 12/31/2013] [Indexed: 11/17/2022] Open
Abstract
Objectives This study evaluated the effect of three antioxidizing agents on pull-out bond strengths of dentin treated with sodium hypochlorite. Materials and Methods Root canals of 75 single-rooted human teeth were prepared. Fifteen teeth were irrigated with normal saline for a negative control group, and the remaining 60 teeth (groups 2 - 5) with 2.5% NaOCl. The teeth in group 2 served as a positive control. Prior to post cementation, the root canals in groups 3 - 5 were irrigated with three antioxidizing agents including 10% rosmarinic acid (RA, Baridge essence), 10% hesperidin (HPN, Sigma), and 10% sodium ascorbate hydrogel (SA, AppliChem). Seventy-five spreaders (#55, taper .02, Produits Dentaires S.A) were coated with silica and silanized with the Rocatec system and ceramic bond. All the prepared spreaders were cemented with a self-adhesive resin cement (Bifix SE, Voco Gmbh) in the prepared canals. After storage in distilled water (24 h/37℃), the spreaders were pulled out in a universal testing machine at a crosshead speed of 1.0 mm/min. Pull-out strength values were analyzed by one-way ANOVA and Tukey's HSD test (α = 0.05). Results There were significant differences between study groups (p = 0.016). The highest pull-out strength was related to the SA group. The lowest strength was obtained in the positive control group. Conclusions Irrigation with NaOCl during canal preparation decreased bond strength of resin cement to root dentin. Amongst the antioxidants tested, SA had superior results in reversing the diminishing effect of NaOCl irrigation on the bond strength to root dentin.
Collapse
Affiliation(s)
- Maryam Khoroushi
- Dental Materials Research Center and Department of Operative Dentistry, Isfahan University of Medical Sciences School of Dentistry, Isfahan, Iran
| | - Marzieh Kachuei
- Dental Students Research Center, Isfahan University of Medical Sciences School of Dentistry, Isfahan, Iran
| |
Collapse
|
86
|
Hattar S, Hatamleh M, Khraisat A, Al-Rabab'ah M. Shear bond strength of self-adhesive resin cements to base metal alloy. J Prosthet Dent 2013; 111:411-5. [PMID: 24355505 DOI: 10.1016/j.prosdent.2013.06.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 06/24/2013] [Accepted: 06/25/2013] [Indexed: 10/25/2022]
Abstract
STATEMENT OF PROBLEM Many self-adhesive cements have been introduced in the past few years, with little or no data regarding their clinical performance. This study investigated the shear bond strength of some recently introduced self-adhesive resin cements. PURPOSE The purpose of this study was to evaluate the shear bond strength of self-adhesive and conventional resin-based cements to a base metal alloy. MATERIAL AND METHODS Four groups (10-12 each) that comprised 3 self-adhesive cements (SmartCem2; RelyX Unicem; seT SDI) and a conventional resin-based cement (RelyX ARC) were tested. Cylindrical cement specimens (diameter, 3 mm; height, 3 mm) were applied to nickel-free base metal alloy (Sheradent) disks with a diameter of 12 mm, and the surface was treated with airborne-particle abrasion of 50 μm aluminum oxide. The metal disks were fixed in brass molds specifically designed for the shear bond test device. Test specimens were incubated at 37°C for 24 hours and then the shear bond was tested with a Zwick Roll testing machine at a 0.8 mm/min cross-head speed. In addition, bond failures were investigated and categorized as adhesive, cohesive, or mixed. Shear bond strengths were calculated by dividing the maximum debonding force over the cross-sectional area of each specimen. One-way ANOVA and the Tukey (honestly significant difference) post hoc test were used to test statistical significant differences among the groups (α=.05). RESULTS Statistical analysis showed significant differences among different resin cements (F=14.34, P<.001). The highest mean shear bond strength was observed for SmartCem2 (14.18 MPa), and the lowest was reported for seT (3.52 MPa). The observed failure mode in all the materials was adhesive in nature, which occurred at the resin-metal interface. CONCLUSIONS The early bond strength of self-adhesive resin cements varied significantly among the tested materials. SmartCem2 showed the highest bond strength, which was 4 times the strength observed for seT SDI.
Collapse
Affiliation(s)
- Susan Hattar
- Assistant Professor and Consultant, Department of Conservative Dentistry, Faculty of Dentistry, The University of Jordan, Amman, Jordan.
| | - Muhanad Hatamleh
- Maxillofacial Prosthetist, Queen Medical Centre, Nottingham University Hospital Trust; School of Dentistry, University of Manchester, Manchester, UK; and Faculty of Applied Medical Sciences, Jordan University of Science and Technology, Jordan
| | - Ameen Khraisat
- Professor and First-Consultant, Department of Conservative Dentistry, Faculty of Dentistry, The University of Jordan, Amman, Jordan
| | - Mohammad Al-Rabab'ah
- Assistant Professor and Consultant, Department of Conservative Dentistry, Faculty of Dentistry, The University of Jordan, Amman, Jordan
| |
Collapse
|
87
|
Human and bovine pulp-derived cell reactions to dental resin cements. Clin Oral Investig 2013; 16:1571-8. [PMID: 22290062 DOI: 10.1007/s00784-011-0657-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 12/05/2011] [Indexed: 01/05/2023]
Abstract
OBJECTIVES The objective of this study was to evaluate the cytotoxic reaction of transfected human pulp derived cells (tHPDC) and transfected bovine pulp derived cells (tBPDC) after exposure to resin cements [RelyX UnicemClicker (RX), MaxCem (MC), Panavia F 2.0 (PF), BisCem (BC), and Bistite II DC (BII)] and to compare it to the generation of reactive oxygen species (ROS). MATERIALS AND METHODS Set materials were extracted in culture medium, cell survival as a measure of cytotoxicity was determined photometrically using crystal violet after cells were exposed to the extracts for 24 h. The generation of ROS was detected by flow cytometry after cells were exposed to extract dilutions for 1 h. RESULTS The ranking of the least to the most cytotoxic material was: RX < BII < PF < BC < MC for both cell lines, but for tHPDC, only MC and PF eluates were different from untreated controls. Generally, tBPDC were more susceptible to materials than tHPDC, but only for RX and BC was this difference statistically significant. All undiluted extracts increased ROS production in both cell lines but to a higher amount in tHPDC than in tBPDC. CONCLUSIONS tHPDC reacted less sensitive than tBPDC in the cytotoxicity test but with the same rank order of materials. In contrast, the cellular oxidative stress reaction was more pronounced in tHPDC than in tBPDC. CLINICAL RELEVANCE Depending on the residual dentine layer in deep cavities, biologically active resin monomers or additives released from resin cements may influence the dentine–pulp complex, for instance, its regenerative and reparative capacities.
Collapse
|
88
|
Tuncdemir AR, Yildirim C, Ozcan E, Polat S. The effect of a diode laser and traditional irrigants on the bond strength of self-adhesive cement. J Adv Prosthodont 2013; 5:457-63. [PMID: 24353886 PMCID: PMC3865203 DOI: 10.4047/jap.2013.5.4.457] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 11/07/2013] [Accepted: 11/13/2013] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The purpose of this study was to compare the effect of a diode laser and traditional irrigants on the bond strength of self-adhesive cement. MATERIALS AND METHODS Fifty-five incisors extracted due to periodontal problems were used. All teeth were instrumented using a set of rotary root canal instruments. The post spaces were enlarged for a No.14 (diameter, 1.4 mm) Snowlight (Abrasive technology, OH, USA) glass fiber reinforced composite post with matching drill. The teeth were randomly divided into 5 experimental groups of 11 teeth each. The post spaces were treated with the followings: Group 1: 5 mL 0.9% physiological saline; Group 2: 5 mL 5.25% sodium hypochlorite; Group 3: 5 mL 17% ethylene diamine tetra acetic acid (EDTA), Group 4: 37% orthophosphoric acid and Group 5: Photodynamic diode laser irradiation for 1 minute after application of light-active dye solution. Snowlight posts were luted with self-adhesive resin cement. Each root was sectioned perpendicular to its long axis to create 1 mm thick specimens. The push-out bond strength test method was used to measure bond strength. One tooth from each group was processed for scanning electron microscopic analysis. RESULTS BOND STRENGTH VALUES WERE AS FOLLOW: Group 1 = 4.15 MPa; Group 2 = 3.00 MPa; Group 3 = 4.45 MPa; Group 4 = 6.96 MPa; and Group 5 = 8.93 MPa. These values were analysed using one-way ANOVA and Tukey honestly significant difference test (P<.05). Significantly higher bond strength values were obtained with the diode laser and orthophosphoric acid (P<.05). There were no differences found between the other groups (P>.05). CONCLUSION Orthophosphoric acid and EDTA were more effective methods for removing the smear layer than the diode laser. However, the diode laser and orthophosphoric acid were more effective at the cement dentin interface than the EDTA, Therefore, modifying the smear layer may be more effective when a self-adhesive system is used.
Collapse
Affiliation(s)
- Ali Riza Tuncdemir
- Department of Prosthodontics, Faculty of Dentistry, University of Necmettin Erbakan, Konya, Turkey
| | - Cihan Yildirim
- Department of Endodontics, Faculty of Dentistry, University of Gaziantep, Gaziantep, Turkey
| | - Erhan Ozcan
- Department of Endodontics, Faculty of Dentistry, University of Selcuk, Konya, Turkey
| | - Serdar Polat
- Department of Prosthodontics, Faculty of Dentistry, University of Gazi, Ankara, Turkey
| |
Collapse
|
89
|
Ramírez-Sebastià A, Bortolotto T, Roig M, Krejci I. Composite vs Ceramic Computer-aided Design/Computer-assisted Manufacturing Crowns in Endodontically Treated Teeth: Analysis of Marginal Adaptation. Oper Dent 2013; 38:663-73. [DOI: 10.2341/12-208-l] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives
To compare the marginal adaptation between ceramic and composite CEREC crowns in endodontically treated teeth restored with endocrowns or with a short or a long post.
Methodology
Forty-eight intact maxillary incisors were used. After endodontic treatment, the crowns were sectioned 2 mm coronally to the cemento-enamel junction, which provided a ferrule of 2 mm. The prepared teeth were divided randomly into six groups (n=8). Group 1 was restored with a large fiberglass post, composite core, and ceramic full-coverage computer-aided design/computer-assisted manufacturing (CAD-CAM) crown. Group 2 was restored with a short fiberglass post, composite core, and ceramic full-coverage CAD-CAM crown. Group 3 was restored with a large fiberglass post, composite core, and composite full-coverage CAD-CAM crown (LPCpr). Group 4 was restored with a short fiberglass post, composite core, and composite full-coverage CAD-CAM crown (SPCpr). Groups 5 and 6 were restored with ceramic and composite CEREC machined endocrowns, respectively (EndoCer and EndoCpr). The restored teeth were loaded thermomechanically in a computer-controlled chewing machine. Impressions of each restoration were made in a polyvinylsiloxane material before and after loading. Gold-coated epoxy replicas were prepared for scanning electron microscopy examination at 200× magnification.
Results
Loading had a statistically significant effect (p<0.05) on the percentage of “continuous margin” in all groups. The LPCpr, SPCpr, and EndoCpr groups showed the highest percentage of continuous margin initially and after loading. The effect of the different post lengths on marginal adaptation was not significant (p>0.05).
Conclusion
CAD-CAM crowns fabricated from millable composite resin blocks (Paradigm MZ100) offer a superior option to all-ceramic crowns (IPS Empress CAD).
Collapse
Affiliation(s)
- A Ramírez-Sebastià
- Anaïs Ramírez-Sebastià, MD, DDS, Universitat Internacional de Catalunya, Department of Endodontic and Restorative Dentistry, C/Josep Trueta s/n, Sant Cugat del Valles, Barcelona 08195, Spain
| | - T Bortolotto
- Tissiana Bortolotto, Geneva School of Dentistry, Department of Cariology and Endodontology, Rue Barthélémy-Menn 19, Geneva, 1205, Switzerland
| | - M Roig
- Miguel Roig, MD, PhD, Universitat Internacional de Catalunya, Restorative Dentistry, Josep Trueta s/n, Sant Cugat del Valles, Barcelona 08195, Spain
| | - I Krejci
- Ivo Krejci, Geneva School of Dentistry, Department of Cariology and Endodontology, Rue Barthélémy-Menn 19, Geneva, 1205, Switzerland
| |
Collapse
|
90
|
Suyama Y, de Munck J, Cardoso MV, Yamada T, Van Meerbeek B. Bond durability of self-adhesive composite cements to dentine. J Dent 2013; 41:908-17. [DOI: 10.1016/j.jdent.2013.07.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 05/31/2013] [Accepted: 07/19/2013] [Indexed: 11/25/2022] Open
|
91
|
Correr AB, Costa AR, Lucato AS, Vedovello SA, Valdrighi HC, Vedovello Filho M, Correr-Sobrinho L. Effect of Activation Mode on Shear Bond Strength of Metallic Brackets. Braz Dent J 2013; 24:513-6. [DOI: 10.1590/0103-6440201302342] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 12/01/2013] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the shear bond strength (SBS) of metallic orthodontic brackets bonded to bovine teeth using light-activated or chemically activated composite resins. One hundred and twenty bovine mandibular incisors were divided into 6 groups (n=20), according to the bonding materials: Transbond XT (T); Enforce Dual (ED); Enforce chemical (EC); Enforce Light-activated (EL); Concise Orthodontic (C); and RelyX Unicem Capsule (UN). Metallic brackets were positioned and firmly bonded to the teeth. Light-activation for T, ED, EL and UN was carried out with four exposures on each side of the bracket with 20 s total exposure times using XL2500 (3M ESPE). EC and C were chemically cured. Next, all specimens were stored in deionized water at 37 °C for 24 h. The shear bond strength was carried out at a crosshead speed of 1.0 mm/min. Data were subjected to one-way ANOVA and Tukey's test (α=0.05). The adhesive remnant index (ARI) was evaluated at 8× magnification. C (17.72±4.45) presented significantly higher SBS means (in MPa) than the other groups (p<0.05), followed by EC (11.97±5.77) and ED (10.57±1.32). EL (5.39±1.06) and UN (4.32±1.98) showed the lowest SBS means, while T (9.09±2.56) showed intermediate values. For ARI, there was a predominance of score 0 for EC, C and UN, and score 3 for T, ED and EL. In conclusion, the activation mode influenced the SBS.
Collapse
|
92
|
Slavcheva S, Krejci I, Bortolotto T. Luting of ceramic crowns with a self-adhesive cement: effect of contamination on marginal adaptation and fracture strength. Med Oral Patol Oral Cir Bucal 2013; 18:e799-803. [PMID: 23722123 PMCID: PMC3790655 DOI: 10.4317/medoral.18544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 01/04/2013] [Indexed: 11/10/2022] Open
Abstract
Objectives: This study evaluated the percentages of continuous margins (%CM) and fracture strength (FS) of crowns made out from blocs of leucite-reinforced ceramic (IPS Empress CAD) and luted with a representative self-adhesive cement (RelyX Unicem) under four contaminating agents: saliva, water, blood, a haemostatic solution containing aluminium chloride (pH= 0.8) and a control group with no contamination.
Study Design: %CM at both tooth-cement (TC) and cement-crown (CC) interfaces were determined before and after a fatigue test consisting of 600’000 chewing loads and 1’500 temperature cycles changing from 5º C to 50º C. Load to fracture was recorded on fatigued specimens. Kruskal-Wallis test was used to compare %CM and FS between the five groups with a level of confidence of 95%.
Results: At the TC interface, no significant differences in marginal adaptation before loading could be detected between groups. After loading, a significant marginal degradation was observed in the group contaminated with aluminium chloride (52 ± 22 %CM) in respect to the other groups. No significant differences in %CM could be detected between the groups contaminated with saliva, water, blood and the control. At the CC interface, no significant differences in marginal adaptation were observed between the groups. The FS on loaded specimens was around 1637N, with no significant differences between groups as well.
Conclusions: An adverse interaction of the highly acidic haemostatic agent with either dentin or the self-adhesive cement could explain the specimens’ marginal degradation. The self-adhesive cement tested in this study was no sensitive to moisture contamination either with saliva, water or blood.
Key words:Marginal adaptation, RelyX Unicem, contamination, all-ceramic crowns.
Collapse
Affiliation(s)
- Slavena Slavcheva
- University of Geneva, School of Dental Medicine, Division of Cariology and Endodontics, Rue Barthelemy-Menn, 19, CH-1205 Geneva, Switzerland,
| | | | | |
Collapse
|
93
|
Schmitter M, Posavec T, Mueller D, Mussotter K, Rammelsberg P, Rues S. Failure load of teeth restored by use of alumina copings: Influence of residual tooth structure and cementation. Dent Mater J 2013; 32:537-43. [PMID: 23903633 DOI: 10.4012/dmj.2013-016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To evaluate failure loads of teeth restored by use of alumina-coping, and to assess the effects of different amounts of residual tooth structure and different cements, standardized artificial alumina copings were fabricated on seventy-two molars. 24 of the copings were cemented by use of an adhesive resin cement (P-group), n=24 by use of glass-ionomer cement (K-group), and n=24 by use of a self-adhesive modified composite resin-cement (R-group). After artificial ageing (10,000 thermal-cycles between 6.5 and 60°C; 1,200,000 chewing cycles with Fmax=64 N), the specimens were loaded until failure (cross-head-speed: 0.5 mm/min). In the K-group 83% of the specimens failed during chewing simulation. Statistical analysis included chi-squared-test, unpaired-to-sample-t-test, and ANOVA. For severely damaged teeth, loads to failure in the P-group (384 N) were significantly (p=0.03) higher than in the R-group (295 N). For severely damaged teeth, use of composite resin cement resulted in higher loads to failure than use of other cements.
Collapse
Affiliation(s)
- Marc Schmitter
- Department of Prosthodontics, University of Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
| | | | | | | | | | | |
Collapse
|
94
|
Suzuki TY, Godas AG, Guedes AP, Catelan A, Pavan S, Briso AL, dos Santos PH. Microtensile bond strength of resin cements to caries-affected dentin. J Prosthet Dent 2013; 110:47-55. [DOI: 10.1016/s0022-3913(13)60339-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
95
|
Mesquita GC, Verissimo C, Raposo LHA, Santos-Filho PCF, Mota ASD, Soares CJ. Can the Cure Time of Endodontic Sealers Affect Bond Strength to Root Dentin? Braz Dent J 2013; 24:340-3. [DOI: 10.1590/0103-6440201302246] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/25/2013] [Indexed: 11/22/2022] Open
Abstract
The cure time of endodontic sealers may influence the bond strength of fiber posts to root dentin. Forty teeth were selected and endodontically filled using calcium hydroxide cement and then divided into 2 groups according to the time elapsed between endodontic filling and post luting (n = 20): Immediately - glass fiber post luting immediately after endodontic filling; and Delayed - post luting performed 7 days after endodontic filling. The roots were also subdivided according to resin cement used for post luting (RelyX ARC and RelyX Unicem). The specimens were stored at 37°C for 24 h and sectioned in six 1-mm-thick slices from cervical, middle and apical thirds. The slice specimens were submitted to a push-out test at a crosshead speed of 0.5 mm/min, and the bond strength values obtained (MPa) were submitted to two-way ANOVA in a split-plot arrangement and Tukey's test (α=0.05). For both RelyX ARC and Unicem, the bond strength was significantly higher when the posts were cemented 7 days after the endodontic treatment. RelyX Unicem showed significantly higher bond strength values than RelyX ARC for both cementation periods. It was concluded that post luting should be made after the complete setting of the root canal sealer. Self-adhesive resin cement should be preferred for fiber post luting.
Collapse
|
96
|
Yildiz C, Vanlıoğlu BA, Evren B, Uludamar A, Kulak-Ozkan Y. Fracture Resistance of Manually and CAD/CAM Manufactured Ceramic Onlays. J Prosthodont 2013; 22:537-542. [DOI: 10.1111/jopr.12037] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2013] [Indexed: 11/30/2022] Open
Affiliation(s)
- Coskun Yildiz
- Assistant Professor, Department of Prosthodontics; Faculty of Dentistry, Marmara University; Istanbul Turkey
| | - Burcin Akoglu Vanlıoğlu
- Associate Professor, Department of Prosthodontics; Faculty of Dentistry, Marmara University; Istanbul Turkey
| | - Buket Evren
- Associate Professor, Department of Prosthodontics; Faculty of Dentistry, Marmara University; Istanbul Turkey
| | | | - Yasemin Kulak-Ozkan
- Professor, Department of Prosthodontics, Faculty of Dentistry; Marmara University; Istanbul Turkey
| |
Collapse
|
97
|
Lee BS, Lin YC, Chen SF, Chen SY, Chang CC. Influence of calcium hydroxide dressing and acid etching on the push-out bond strengths of three luting resins to root canal dentin. Clin Oral Investig 2013; 18:489-98. [DOI: 10.1007/s00784-013-0996-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 04/23/2013] [Indexed: 01/21/2023]
Affiliation(s)
- Bor-Shiunn Lee
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan
| | | | | | | | | |
Collapse
|
98
|
Dall Agnol RJC, Ghiggi PC, Paranhos MPG, Borges GA, Burnett LH, Spohr AM. Influence of resin cements on cuspal deflection and fracture load of endodontically-treated teeth restored with composite inlays. Acta Odontol Scand 2013; 71:664-70. [PMID: 22906039 DOI: 10.3109/00016357.2012.715187] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES To evaluate the influence of resin cements on cuspal deflection, fracture load and failure mode of endodontically-treated teeth restored with composite resin inlays. MATERIALS AND METHODS Forty maxillary premolars were randomly divided into four groups: G1 (sound teeth, control), G2 (RelyX ARC), G3 (RelyX Unicem) and G4 (Maxcem Elite). The teeth from groups 2, 3 and 4 received mesial-occlusal-distal preparations and endodontic treatments. Impressions were taken with vinyl polysiloxane and poured using type IV die stone. Inlays with Z250 composite resin were built over each cast and luted with the resin cements. A 200-N load was applied on the occlusal surface and the cuspal deflection was measured using a micrometer. The specimens were then subjected to an axial load until failure occurred. The resulting failure mode was analyzed. RESULTS The means for cuspal deflection (μm) and fracture load (N) followed by the same letter represent no statistically significant difference based on ANOVA and Tukey's test (p < 0.05). Cuspal deflection: G1 = 4.7 (± 1.7)(a), G2 = 12.0 (± 8.9)(a), G3 = 39.0 (± 27.0)(b) and G4 = 56.8 (± 18.2)(b). Fracture load: G1 = 1982 (± 893)(a), G2 = 690.9 (± 225.5)(b), G3 = 679 (± 193.6)(b) and G4 = 465.5 (± 121.6)(b). G1 presented cusp fractures only at the cement-enamel junction (CEJ). There was a high frequency of cusp fractures below the CEJ in G2, G3 and G4. CONCLUSIONS Composite resin inlays luted with resin cements do not recover the strength of sound teeth. However, teeth restored with composite resin inlays and luted with RelyX ARC can withstand mechanical fatigue longer before failure occurs than those luted with RelyX Unicem and Maxcem Elite.
Collapse
|
99
|
Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength. Clin Oral Investig 2013; 18:545-54. [PMID: 23604697 DOI: 10.1007/s00784-013-0978-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 04/04/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVES This study aims to evaluate the fracture resistance of endodontically treated anterior teeth restored with crowns made of composite or ceramic and retained without the use of a post (endocrowns) or with posts of 5 mm (short) and 10 mm in length (long). MATERIAL AND METHODS Forty-eight intact maxillary incisors were selected for the study. After endodontic treatment, the crowns were sectioned 2 mm coronally to the cementoenamel junction provided with a ferrule of 2 mm. The roots were randomly divided into six groups (n = 8) according to the post length and type of coronary restoration. The crowns were fabricated with the chairside economical restoration of esthetic ceramics system. Group 1 was restored with a 10-mm glass fiber post, composite core, and a full-coverage ceramic crown (LPCer); group 2, with a 5-mm glass fiber post, composite core, and a full-coverage ceramic crown (SPCer); group 3, with a 10-mm glass fiber post, composite core, and a full-coverage composite crown (LPCpr); group 4, with a 5-mm glass fiber post, composite core, and a full-coverage composite crown (SPCpr); and groups 5 (EndoCer) and 6 (EndoCpr) were restored with ceramic and composite endocrowns, respectively. The teeth were then thermomechanically loaded in a chewing machine. After fatigue, the specimens were loaded to fracture. Data were analyzed with ANOVA and chi-square test. Mode of failure was defined as repairable or non-repairable. RESULTS Presence of post, post length, and crown material had no significant effect on the fracture resistance. Groups restored with endocrowns presented a higher number of repairable fractures in respect to the other groups. CONCLUSIONS Presence of a post had no effect on the restorations' fracture strength. CLINICAL RELEVANCE Although this in vitro study has some limitations in respect to its clinical relevance, the restoration of largely destroyed anterior teeth with the use of an endocrown or a short glass fiber post might have advantages over a large glass fiber post.
Collapse
|
100
|
Shafiei F, Fekrazad R, Kiomarsi N, Shafiei E. Bond strength of two resin cements to dentin after disinfection pretreatment: effects of Er,Cr:YSGG laser compared with chemical antibacterial agent. Photomed Laser Surg 2013; 31:206-11. [PMID: 23600378 DOI: 10.1089/pho.2012.3400] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE This study compared the effects of two disinfection procedures (2% chlorhexidine [CHX] solution versus Er,Cr:YSGG laser irradiation) on the shear bond strength of ED primer II/Panavia F2.0 (ED/P) and Excite DSC/Variolink N (Ex/V). BACKGROUND DATA Different methods are used for cavity disinfection prior to adhesive cementation, which may influence the bonding ability of resin cements. METHODS Flat dentin surfaces were prepared on 100 extracted premolars and randomly divided into 10 groups. In the eight experimental groups, indirect composite samples were cemented with either ED/P or Ex/V under three disinfecting conditions on the dentin surface as follows: (1) CHX application before ED primer II/ after etching, (2) wet laser irradiation (Er,Cr:YSGG laser, 20 Hz, 0.75 W, 15% water +15% air), (3) dry laser irradiation with no water and air cooling. The control groups had no disinfectant application. After 24 h water storage, bond strength test was performed. The data (MPa) were analyzed using two way ANOVA and Tukey tests. RESULTS The lowest and highest bond strengths were obtained by dry laser and wet laser (10.18±2.67 and 17.36±2.94 for ED/P, 9.64±2.66 and 20.07±3.36 for Ex/V, respectively). For each cement, two-by-two comparisons of four groups revealed significant differences only for dry laser with others (p<0.001). CONCLUSIONS The use of CHX and Er,Cr:YSGG laser at the low fluences with water/air cooling as the antibacterial agents does not adversely influence the bonding ability of the etch-and-rinse and the self-etch cements.
Collapse
Affiliation(s)
- Fereshteh Shafiei
- Department of Operative Dentistry, Dental Faculty, Shiraz University of Medical Sciences, Shiraz, Iran
| | | | | | | |
Collapse
|