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Ismail HS, Ali AI, Elawsya ME. Influence of curing mode and aging on the bonding performance of universal adhesives in coronal and root dentin. BMC Oral Health 2024; 24:1188. [PMID: 39369181 PMCID: PMC11456248 DOI: 10.1186/s12903-024-04879-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 09/06/2024] [Indexed: 10/07/2024] Open
Abstract
BACKGROUND This study aims to evaluate the microtensile bond strength (µTBS) of different resin composite restorations bonded to mid-coronal dentin and proximal root dentin using light-cured, chemical-cured, and dual-cured adhesives immediately and after aging. Nanoleakage and degree of cure were also assessed. METHODS Eighty-four molars were divided into mid-coronal dentin and proximal root dentin. Each group was further subdivided into three subgroups based on the restorative systems used, which involved the utilization of light-cured, chemical-cured, and dual-cured adhesives. Half of the specimens underwent µTBS testing after 24 h, while the other half after aging. Representative specimens were analyzed for nanoleakage. The degree of cure of the tested adhesive systems was also assessed. RESULTS Aging showed a significant negative effect on µTBS results and led to increased nanoleakage (p < 0.001). Furthermore, in all subgroups, the µTBS values of proximal root dentin were lower compared to mid-coronal dentin, except in the aged subgroup for the system utilizing the dual-cured adhesive. The restorative systems with chemical and dual-cured adhesives demonstrated comparable bonding properties. However, the system with the light-cured adhesive exhibited the worst bonding properties after aging when bonded to proximal root dentin and cured at a large distance (p < 0.05). CONCLUSIONS All tested restorative systems were negatively affected by aging, and the regional dentin had variable effects on the bonding properties. Clinicians should exercise caution when using the tested light-cured adhesive in areas where the curing distance exceeds 3 mm.
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Affiliation(s)
- Hoda Saleh Ismail
- Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Algomhoria Street, PO Box 35516, Mansoura, Aldakhlia, Egypt.
| | - Ashraf Ibrahim Ali
- Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Algomhoria Street, PO Box 35516, Mansoura, Aldakhlia, Egypt
| | - Mohamed Elshirbeny Elawsya
- Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Algomhoria Street, PO Box 35516, Mansoura, Aldakhlia, Egypt
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Wada K, Wada J, Uctasli MB, Uctasli S, Yavuz Y, Iwamoto T, Vallittu PK, Garoushi S, Lassila L. Impact of restorative material on fracture behaviors of class II restoration in endodontically treated deciduous molars. Dent Mater J 2024; 43:738-745. [PMID: 39198175 DOI: 10.4012/dmj.2024-067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2024]
Abstract
The purpose of this study was to investigate the fracture behavior of endodontically treated (ET) deciduous molar when directly restored with different restorative materials in Class II (MO) cavities in comparison with permanent teeth. MO cavities were prepared with 2.4-2.5 mm and 1.9-2.0 mm in buccolingual width, and mesiodistal width of each cavity walls, respectively, followed by direct restoration with different materials: resin-modified glass ionomer cement (RMGIC), composite resin (CR), and composite resin containing 25% short glass-fiber (SFRC). All specimens were subjected to mechanical loading tests at a speed of 1 mm/min and evaluated fracture resistance and fracture modes. A one-way ANOVA followed by a Tukey multiple comparisons analysis was used. Deciduous-SFRC (3,310.5±396.2 N) were significantly higher fracture resistance than permanent-RMGIC (1,633.8±346.8 N) (p<0.001), and permanent-CR (1,400.0±381.3 N) (p<0.001). For the direct restoration of MO cavity after endodontic treatment, SFRC demonstrated its promising performance in load-bearing capacity and failure mode, especially in ET deciduous molars.
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Affiliation(s)
- Kanae Wada
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre (TCBC), Institute of Dentistry, University of Turku
- Department of Pediatric Dentistry/Special Needs Dentistry, Tokyo Medical and Dental University (TMDU)
| | - Junichiro Wada
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre (TCBC), Institute of Dentistry, University of Turku
- Department of Advanced Prosthodontics, Tokyo Medical and Dental University (TMDU)
| | - Mine Betul Uctasli
- Department of Restorative Dentistry, Faculty of Dentistry, University of Gazi
| | - Sadullah Uctasli
- Department of Prosthodontics, Faculty of Dentistry, University of Ankara
| | - Yasemin Yavuz
- Restorative Dentistry, Faculty of Dentistry, Harran University
| | - Tsutomu Iwamoto
- Department of Pediatric Dentistry/Special Needs Dentistry, Tokyo Medical and Dental University (TMDU)
| | - Pekka K Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre (TCBC), Institute of Dentistry, University of Turku
- Welfare District of South-West Finland
| | - Sufyan Garoushi
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre (TCBC), Institute of Dentistry, University of Turku
| | - Lippo Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre (TCBC), Institute of Dentistry, University of Turku
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Tiron B, Forna NC, Tărăboanță I, Stoleriu S, Topoliceanu C, Sălceanu M, Brânzan R, Iovan G. The Evaluation of the Cervical Marginal Sealing of Direct vs. Indirect Composite Resin Restorations in MOD Cavities. Dent J (Basel) 2024; 12:92. [PMID: 38668004 PMCID: PMC11048988 DOI: 10.3390/dj12040092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/18/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024] Open
Abstract
INTRODUCTION The aim of this in vitro study was to compare the quality of marginal sealing at the cervical margins of indirect and direct composite resin restorations in mesio-occluso-distal (MOD) cavities. MATERIAL AND METHOD MOD preparations were performed on 30 extracted teeth. The mesial cervical margin of each tooth was relocated using a flow composite resin (Enamel Plus HRi Flow, Micerium, Avegno, GE, Italy), then the samples were divided into three groups. In group A, the cavities were directly restored using a nanohybrid composite resin (Miris 2 Coltène Whaledent, Altstaetten, Switzerland) and a universal adhesive (ScotchBond Universal, 3M ESPE, St. Paul, MN, USA) by the etch-and-rinse strategy, for group B, the restoration procedure was similar but the self-etch strategy was used, and the samples in group C were filled using the inlay technique. Each sample was stored for 48 h in a 2% methylene blue solution, then it was cut in a mesio-distal direction using a Struers Secotom 50 device (Cleveland, OH, USA). The marginal sealing and adhesive interface were assessed for each sample at the cervical margin by optical microscopy (OM) and scanning electron microscopy (SEM). One-way ANOVA and Bonferroni post-hoc tests were used with a significance level of 0.05. RESULTS Significant differences were recorded within groups A and C, between mesial and distal margins (p = 0.02 in group A and p = 0.043 in group C). CONCLUSIONS The marginal sealing is more effective in MOD inlay restoration compared to direct restorations. Relocation of the cervical margin with flow composite resin and the use of different adhesive strategies do not improve the marginal sealing.
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Affiliation(s)
| | - Norina Consuela Forna
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Str., 700115 Iasi, Romania
| | - Ionuț Tărăboanță
- Faculty of Dental Medicine, Grigore T. Popa University of Medicine and Pharmacy, 16 Universitatii Str., 700115 Iasi, Romania
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Zhou Z, Guo D, Watts DC, Fischer NG, Fu J. Application and limitations of configuration factor (C-factor) in stress analysis of dental restorations. Dent Mater 2023; 39:1137-1149. [PMID: 37838610 DOI: 10.1016/j.dental.2023.10.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 10/06/2023] [Accepted: 10/06/2023] [Indexed: 10/16/2023]
Abstract
OBJECTIVE The configuration factor (C-factor) is an index used to evaluate the relationship between cavity configuration and the development of polymerization shrinkage stress in dental restorations. Although C-factor has been widely researched, its correlation with stress analysis in dental restorations remains controversial. This review aims to discuss the application and limitations of C-factor and define the restricted conditions under which the C-factor "rule of thumb" is applicable. METHODS A thorough literature review was conducted on the application and limitations of C-factor in stress analysis of dental restorations. This was principally based on MEDLINE/PubMed and Web of Science databases and a review of the relevant studies and publications in scientific papers in international peer-reviewed journals for the specific topic of C-factor and polymerization shrinkage. RESULTS The C-factor alone cannot provide an accurate prediction of the shrinkage stress of restorations and the mechanical behavior of material-tooth interfaces. C-factor is only applicable under one condition not typically seen in clinical practice: low, near-rigid compliance. SIGNIFICANCE Conditions for the application of C-factor have been explicitly defined. A more accurate and precise understanding and utilization of the C-factor is of benefit as it contributes to better understanding of polymerization shrinkage behavior of restorations.
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Affiliation(s)
- Zixuan Zhou
- Department of Prosthodontics, The Affiliated Hospital of Qingdao University, 266000 Qingdao, China; School of Stomatology of Qingdao University, 266003 Qingdao, China
| | - Di Guo
- Department of Prosthodontics, The Affiliated Hospital of Qingdao University, 266000 Qingdao, China; School of Stomatology of Qingdao University, 266003 Qingdao, China
| | - David C Watts
- University of Manchester, School of Medical Sciences, Oxford Road, M13 9PL Manchester, UK
| | - Nicholas G Fischer
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Jing Fu
- Department of Prosthodontics, The Affiliated Hospital of Qingdao University, 266000 Qingdao, China; School of Stomatology of Qingdao University, 266003 Qingdao, China.
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Panebianco CJ, Constant C, Vernengo AJ, Nehrbass D, Gehweiler D, DiStefano TJ, Martin J, Alpert DJ, Chaudhary SB, Hecht AC, Seifert AC, Nicoll SB, Grad S, Zeiter S, Iatridis JC. Combining adhesive and nonadhesive injectable hydrogels for intervertebral disc repair in an ovine discectomy model. JOR Spine 2023; 6:e1293. [PMID: 38156055 PMCID: PMC10751969 DOI: 10.1002/jsp2.1293] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 09/12/2023] [Accepted: 09/20/2023] [Indexed: 12/30/2023] Open
Abstract
Background Intervertebral disc (IVD) disorders (e.g., herniation) directly contribute to back pain, which is a leading cause of global disability. Next-generation treatments for IVD herniation need advanced preclinical testing to evaluate their ability to repair large defects, prevent reherniation, and limit progressive degeneration. This study tested whether experimental, injectable, and nonbioactive biomaterials could slow IVD degeneration in an ovine discectomy model. Methods Ten skeletally mature sheep (4-5.5 years) experienced partial discectomy injury with cruciate-style annulus fibrosus (AF) defects and 0.1 g nucleus pulposus (NP) removal in the L1-L2, L2-L3, and L3-L4 lumbar IVDs. L4-L5 IVDs were Intact controls. IVD injury levels received: (1) no treatment (Injury), (2) poly (ethylene glycol) diacrylate (PEGDA), (3) genipin-crosslinked fibrin (FibGen), (4) carboxymethylcellulose-methylcellulose (C-MC), or (5) C-MC and FibGen (FibGen + C-MC). Animals healed for 12 weeks, then IVDs were assessed using computed tomography (CT), magnetic resonance (MR) imaging, and histopathology. Results All repaired IVDs retained ~90% of their preoperative disc height and showed minor degenerative changes by Pfirrmann grading. All repairs had similar disc height loss and Pfirrmann grade as Injury IVDs. Adhesive AF sealants (i.e., PEGDA and FibGen) did not herniate, although repair caused local endplate (EP) changes and inflammation. NP repair biomaterials (i.e., C-MC) and combination repair (i.e., FibGen + C-MC) exhibited lower levels of degeneration, less EP damage, and less severe inflammation; however, C-MC showed signs of herniation via biomaterial expulsion. Conclusions All repair IVDs were noninferior to Injury IVDs by IVD height loss and Pfirrmann grade. C-MC and FibGen + C-MC IVDs had the best outcomes, and may be appropriate for enhancement with bioactive factors (e.g., cells, growth factors, and miRNAs). Such bioactive factors appear to be necessary to prevent injury-induced IVD degeneration. Application of AF sealants alone (i.e., PEGDA and FibGen) resulted in EP damage and inflammation, particularly for PEGDA IVDs, suggesting further material refinements are needed.
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Affiliation(s)
- Christopher J. Panebianco
- Leni and Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
- Department of Orthopaedic SurgeryUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| | | | - Andrea J. Vernengo
- AO Research Institute DavosDavosSwitzerland
- Department of Chemical EngineeringRowan UniversityGlassboroNJUSA
| | | | | | - Tyler J. DiStefano
- Leni and Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
| | - Jesse Martin
- Department of Biomedical EngineeringThe City College of New YorkNew YorkNew YorkUSA
| | - David J. Alpert
- Department of Biomedical EngineeringThe City College of New YorkNew YorkNew YorkUSA
| | - Saad B. Chaudhary
- Leni and Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
| | - Andrew C. Hecht
- Leni and Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
| | - Alan C. Seifert
- Biomedical Engineering and Imaging InstituteIcahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
| | - Steven B. Nicoll
- Department of Biomedical EngineeringThe City College of New YorkNew YorkNew YorkUSA
| | | | | | - James C. Iatridis
- Leni and Peter W. May Department of OrthopaedicsIcahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
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Kibe K, Hatayama T, Shimada Y. In vitro performance of an autocured universal adhesive system in bonding to dentin. BMC Oral Health 2023; 23:933. [PMID: 38012568 PMCID: PMC10683120 DOI: 10.1186/s12903-023-03645-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND The successful integration of resin-based dental adhesives significantly impacts restorative dentistry, providing efficient and aesthetically pleasing caries treatments. Among various adhesives, one-step self-etching adhesives (1-SEAs) have gained popularity due to their simplicity and short application time. However, concerns have been raised regarding their bonding performance and marginal adaptation characteristics, which differ from two-step self-etching adhesives (2-SEAs) and three-step etch-and-rinse adhesives. Additionally, light-cured bonding materials may encounter challenges in deep cavities and inaccessible areas, necessitating extended light irradiation time. Autocured bonding materials are a potential solution, but limited comparative studies have been conducted on their performance. METHODS In this in vitro study, we evaluated a new autocured universal bonding material (Bondmer Lightless 2) and compared the results with recent light-cured bonding materials. Microshear bond strength (μSBS) tests were performed on 25 human molars using five different combinations of adhesives and composite resins: Bondmer Lightless 2 with Estelite Bulk Fill Flow (BE group), Bondmer Lightless 2 with a prototype composite resin (BO group), Prime&Bond Universal with SDR flow + (PS group), Scotchbond Universal with Filtek Bulk Fill (SF group), and G-Premio Bond with Gracefil BulkFlo (GG group). The bond strengths and failure modes were assessed using a universal testing machine and scanning electron microscope (SEM), respectively. Marginal adaptation was evaluated using swept-source optical coherence tomography (SS-OCT) and confocal laser scanning microscopy (CLSM) on 40 sound bovine maxillary incisors. RESULTS The μSBS test showed no significant differences in bond strength among the tested groups. Most failure modes were observed at the bond interface between the adhesive and the dentin. The autocured bonding material demonstrated significantly higher marginal adaptation (SI%) than PS, SF, and GG. The CLSM images corresponded with gaps observed in the SS-OCT images, indicating improved marginal sealing in the autocured group. CONCLUSIONS The new autocured universal bonding material exhibited comparable bond strength to a conventional light-cured material while demonstrating a superior marginal adaptation level. This finding suggested that the autocured material could be a valuable alternative, especially when extended light irradiation would pose a challenge. Further clinical studies would be warranted to evaluate the performance of the autocured bonding material in actual restorative dental practice.
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Affiliation(s)
- Kota Kibe
- Division of Oral Health Sciences, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8510, Japan
| | - Takashi Hatayama
- Division of Oral Health Sciences, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8510, Japan.
| | - Yasushi Shimada
- Division of Oral Health Sciences, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8510, Japan
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He J, Lassila L, Garoushi S, Vallittu P. Tailoring the monomers to overcome the shortcomings of current dental resin composites - review. Biomater Investig Dent 2023; 10:2191621. [PMID: 37090482 PMCID: PMC10120559 DOI: 10.1080/26415275.2023.2191621] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
Dental resin composites (DRCs) have become the first choice among different restorative materials for direct anterior and posterior restorations in the clinic. Though the properties of DRCs have been improved greatly in recent years, they still have several shortcomings, such as volumetric shrinkage and shrinkage stress, biofilm development, lack of radio-opacity for some specific DRCs, and estrogenicity, which need to be overcome. The resin matrix, composed of different monomers, constitutes the continuous phase and determine the performance of DRCs. Thus, the chemical structure of the monomers plays an important role in modifying the properties of DRCs. Numerous researchers have taken to design and develop novel monomers with specific functions for the purpose of fulfilling the needs in dentistry. In this review, the development of monomers in DRCs were highlighted, especially focusing on strategies aimed at reducing volumetric shrinkage and shrinkage stress, endowing bacteriocidal and antibacterial adhesion activities as well as protein-repelling activity, increasing radio-opacity, and replacing Bis-GMA. The influences of these novel monomers on the properties of DRCs were also discussed.
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Affiliation(s)
- Jingwei He
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- CONTACT Jingwei He College of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Lippo Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Sufyan Garoushi
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Pekka Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- Wellbeing Services County of South-West Finland, Turku, Finland
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Korkut B, Tüter B, Tağtekin D. Composite plastering technique (CPT) for anterior and posterior restorations. BALKAN JOURNAL OF DENTAL MEDICINE 2023. [DOI: 10.5937/bjdm2301008k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
Abstract
Composite plastering technique (CPT) is a novel restoration improvement technique for eliminating and re-contouring the marginal defects. Restoration-related interproximal contour deficiencies such as dark triangles beneath the contact point following direct class II restorations, the gaps at the interproximal cavity step following indirect cementations, and the gaps at the interproximal wall following class III restoration layering procedures can be corrected using the CPT. The technique may also be used as a layering step during the free-hand layering in diastema closure restorations. Contour deficiencies on interproximal surfaces which lead to the renewal of restoration and periodontal damages can be prevented by additional direct composite build-up using the CPT. The technique can be performed either immediately after the restoration directly or long after by using the composite repair protocol. It focuses on filling and re-contouring the surface of the deficiency by using a mylar strip actively under rubberdam isolation. Composite is loaded between the strip and the tooth surface and the strip is pulled slightly in palato-buccal or the opposite direction depending on the location of the defect, to fill it by plastering the composite. It may contribute the longevity of the restoration by improving the emergence profile and correcting the interproximal contour. Re-contouring of the interproximal surface defects by CPT is a useful approach to improve the esthetics as well as the function of anterior and posterior direct and indirect restorations which may also prolong the longevity.
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Fracture Resistance and Microleakage around Direct Restorations in High C-Factor Cavities. Polymers (Basel) 2022; 14:polym14173463. [PMID: 36080538 PMCID: PMC9460406 DOI: 10.3390/polym14173463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/20/2022] [Accepted: 08/21/2022] [Indexed: 11/29/2022] Open
Abstract
The aim of this research was to evaluate the mechanical impact of different direct restorations in terms of fracture resistance, and subsequent fracture pattern, in occlusal high C-factor cavities. Furthermore, the adaptation of different direct restorations in the form of gap formation was also evaluated. Seventy-two intact mandibular molars were collected and randomly distributed into three groups (n = 24). Class I occlusal cavities with standardized dimensions were prepared in all specimens. After adhesive treatment, the cavities were restored with direct restorations utilizing three different materials. Group 1: layered conventional packable resin composite (Filtek Ultimate), Group 2: bulk-fill resin composite (SDR), Group 3: bulk-fill short fibre-reinforced composite (SFRC; everX Posterior) covered with packable composite occlusally. Half of the restored specimens underwent static load-to fracture testing (n = 12/group), while the rest underwent sectioning and staining for microleakage evaluation and gap formation analysis. Fracture patterns were evaluated visually among the mechanically tested specimens. The layered composite restoration (Group 1) showed significantly lower fracture resistance compared to the bulk fill groups (Group 2, p = 0.005, Group 3, p = 0.008), while there was no difference in fracture resistance between the other groups. In terms of gap formation values, the layered composite restoration (Group 1) produced significantly higher gap formation compared to the bulk-fill groups (Group 2, p = 0.000, Group 3, p = 0.000). Regarding the fracture pattern, SFRC (Group 3) produced the highest number, while SDR (Group 2) produced the lowest number of repairable fractures. The use of bulk-fill resin composite (fibre or non-fibre-reinforced) for occlusal direct restorations in high C-factor cavities showed promising achievements regarding both fracture resistance and microleakage. Furthermore, the use of short fibre-reinforced bulk-fill composite can also improve the fracture pattern of the restoration-tooth unit. Bulk-fill materials provide a simple and effective solution for restoring and reinforcing high C-factor occlusal cavities.
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Albeshir EG, Alsahafi R, Albluwi R, Balhaddad AA, Mitwalli H, Oates TW, Hack GD, Sun J, Weir MD, Xu HHK. Low-Shrinkage Resin Matrices in Restorative Dentistry-Narrative Review. MATERIALS (BASEL, SWITZERLAND) 2022; 15:2951. [PMID: 35454643 PMCID: PMC9029384 DOI: 10.3390/ma15082951] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 02/06/2023]
Abstract
Dimethacrylate-based resin composites restorations have become widely-used intraoral materials in daily dental practice. The increasing use of composites has greatly enhanced modern preventive and conservative dentistry. They have many superior features, especially esthetic properties, bondability, and elimination of mercury and galvanic currents. However, polymeric materials are highly susceptible to polymerization shrinkage and stresses that lead to microleakage, biofilm formation, secondary caries, and restoration loss. Several techniques have been investigated to minimize the side effects of these shrinkage stresses. The primary approach is through fabrications and modification of the resin matrices. Therefore, this review article focuses on the methods for testing the shrinkage, as well as formulations of resinous matrices available to reduce polymerization shrinkage and its associated stress. Furthermore, this article reviews recent cutting-edge developments on bioactive low-shrinkage-stress nanocomposites to effectively inhibit the growth and activities of cariogenic pathogens and enhance the remineralization process.
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Affiliation(s)
- Ebtehal G. Albeshir
- Program in Dental Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; (E.G.A.); (R.A.)
- Department of Restorative Dentistry, King Abdul-Aziz Medical City, Ministiry of National Guard—Health Affairs, Riyadh 11426, Saudi Arabia;
- King Saud Bin Abdulaziz University for Health Sciences, Riyadh 11426, Saudi Arabia
- King Abdullah International Medical Research Center, Ministiry of National Guard—Health Affairs, Riyadh 11426, Saudi Arabia
| | - Rashed Alsahafi
- Program in Dental Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; (E.G.A.); (R.A.)
- Department of Restorative Dental Sciences, College of Dentistry, Umm Al-Qura University, Makkah 24381, Saudi Arabia
| | - Reem Albluwi
- Department of Restorative Dentistry, King Abdul-Aziz Medical City, Ministiry of National Guard—Health Affairs, Riyadh 11426, Saudi Arabia;
- King Saud Bin Abdulaziz University for Health Sciences, Riyadh 11426, Saudi Arabia
- King Abdullah International Medical Research Center, Ministiry of National Guard—Health Affairs, Riyadh 11426, Saudi Arabia
| | - Abdulrahman A. Balhaddad
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman bin Faisal University, Dammam 31441, Saudi Arabia;
| | - Heba Mitwalli
- Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Thomas W. Oates
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.W.O.); (G.D.H.)
| | - Gary D. Hack
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.W.O.); (G.D.H.)
| | - Jirun Sun
- The Forsyth Institute, A Harvard School of Dental Medicine Affiliate, 245 First Street, Cambridge, MA 02142, USA
| | - Michael D. Weir
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.W.O.); (G.D.H.)
| | - Hockin H. K. Xu
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; (T.W.O.); (G.D.H.)
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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KAYA S, OZEL BEKTAS O. EFFECT OF İN-OFFİCE BLEACHİNG ON THE SURFACE ROUGHNESS OF DİFFERENT COMPOSİTE RESİNS. CUMHURIYET DENTAL JOURNAL 2022. [DOI: 10.7126/cumudj.1030957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Marginal Adaptation and Micropermeability of Class II Cavities Restored with Three Different Types of Resin Composites-A Comparative Ten-Month In Vitro Study. Polymers (Basel) 2021; 13:polym13101660. [PMID: 34065229 PMCID: PMC8160838 DOI: 10.3390/polym13101660] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 12/20/2022] Open
Abstract
The development of composite materials is subject to the desire to overcome polymerization shrinkage and generated polymerization stress. An indicator characterizing the properties of restorative materials, with specific importance for preventing secondary caries, is the integrity and durability of marginal sealing. It is a reflection of the effects of polymerization shrinkage and generated stress. The present study aimed to evaluate and correlate marginal integrity and micropermeability in second-class cavities restored with three different types of composites, representing different strategies to reduce polymerization shrinkage and stress: nanocomposite, silorane, and bulk-fill composite after a ten-month ageing period. Thirty standardized class ΙΙ cavities were prepared on extracted human molars. Gingival margins were 1 mm apical to the cementoenamel junction. Cavities were randomly divided into three groups, based on the composites used: FiltekUltimate-nanocomposite; Filtek Silorane LS-silorane; SonicFill-bulk-fill composite. All specimens were subjected to thermal cycles after that, dipped in saline for 10-mounds. After ageing, samples were immersed in a 2% methylene blue. Thus prepared, they were covered directly with gold and analyzed on SEM for assessment of marginal seal. When the SEM analysis was completed, the teeth were included into epoxy blocks and cut longitudinally on three slices for each cavity. An assessment of microleakage on stereomicroscope followed. Results were statistically analyzed. For marginal seal evaluation: F.Ultimate and F.Silorane differ statistically with more excellent results than SonicFill for marginal adaptation to the gingival margin, located entirely in the dentin. For microleakage evaluation: F.Ultimate and F.Silorane differ statistically with less microleakage than SonicFill. Based on the results obtained: a strong correlation is found between excellent results for marginal adaptation to the marginal gingival ridge and micropermeability at the direction to the axial wall. We observe a more significant influence of time at the gingival margin of the cavities. There is a significant increase in the presence of marginal fissures (p = 0.001). A significant impact of time (p < 0.000) and of the material (p < 0.000) was found in the analysis of the microleakage.
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ŞENOL AA, YILMAZ ATALI P, KAHRAMANOĞLU E. Microleakage and Marginal Integrity of Direct and Indirect Composite Resin Restorations in MOD Cavities After Thermo-Mechanical Loading. CLINICAL AND EXPERIMENTAL HEALTH SCIENCES 2021. [DOI: 10.33808/clinexphealthsci.880368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Pereira JR, Vidotti HA, Júnior LC, Vermudt A, de Souza Almeida M, Pamato S. Analysis of microleakage and marginal gap presented by new polymeric systems in class V restorations: An in vitro study. Saudi Dent J 2021; 33:156-160. [PMID: 33679109 PMCID: PMC7910649 DOI: 10.1016/j.sdentj.2019.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 11/11/2019] [Accepted: 11/13/2019] [Indexed: 11/23/2022] Open
Abstract
Objective Evaluating the contraction of polymerization effect of silorane-based composite on dental interface in enamel. Materials and Methods Eighty class V cavities were confectioned in forty extracted molar teeth and restored with different combinations of resinous-based and bond system. They were divided into the following groups: (G1) three-step etch-and-rinse adhesive system and methacrylate-based resin, (G2) two-step etch-and-rinse adhesive system and methacrylate-based resin, (G3) Filtek P-90 self-conditioning adhesive system and methacrylate-based resin, (G4) Adper SE Plus self-conditioning adhesive system and methacrylate-based resin, (G5) three-step etch-and-rinse adhesive system and silorane-based resin, (G6) two-step etch-and-rinse adhesive system and silorane-based resin, (G7) Filtek P-90 self-conditioning adhesive system and silorane-based resin, (G8) Adper SE Plus self-conditioning adhesive system and silorane-based resin. Results Group 7 showed lower marginal leakage when compared with all other groups (p = 0.001). Conclusions The results allows suggesting that silorane-based resinous system is adequate to promote more satisfactory marginal sealing than any other combination, since the system is combined with its own bond system.
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Affiliation(s)
| | | | - Lindomar Corrêa Júnior
- Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, SC, Brazil
| | - Alef Vermudt
- Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, SC, Brazil
| | - Mauro de Souza Almeida
- Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, SC, Brazil
| | - Saulo Pamato
- Department of Health Sciences, University of Southern Santa Catarina, Tubarão, Brazil
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Shrinkage vectors in flowable bulk-fill and conventional composites: bulk versus incremental application. Clin Oral Investig 2020; 25:1127-1139. [PMID: 32653992 PMCID: PMC7878238 DOI: 10.1007/s00784-020-03412-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 06/11/2020] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Sufficient depth of cure allows bulk-fill composites to be placed with a 4-mm thickness. This study investigated bulk versus incremental application methods by visualizing shrinkage vectors in flowable bulk-fill and conventional composites. MATERIALS AND METHODS Cylindrical cavities (diameter = 6 mm, depth = 4 mm) were prepared in 24 teeth and then etched and bonded with OptiBond FL (Kerr, Italy). The composites were mixed with 2 wt% radiolucent glass beads. In one group, smart dentin replacement (SDR, Dentsply) was applied in bulk "SDR-bulk" (n = 8). In two groups, SDR and Tetric EvoFlow (Ivoclar Vivadent) were applied in two 2-mm-thick increments: "SDR-incremental" and "EvoFlow-incremental." Each material application was scanned with a micro-CT before and after light-curing (40 s, 1100 mW/cm2), and the shrinkage vectors were computed via image segmentation. Thereafter, linear polymerization shrinkage, shrinkage stress and gelation time were measured (n = 10). RESULTS The greatest shrinkage vectors were found in "SDR-bulk" and "SDR-increment2," and the smallest were found in "SDR-increment1-covered" and "EvoFlow-increment1-covered." Shrinkage away from and toward the cavity floor was greatest in "SDR-bulk" and "EvoFlow-increment2," respectively. The mean values of the shrinkage vectors were significantly different between groups (one-way ANOVA, Tamhane's T2 test, p < 0.05). The linear polymerization shrinkage and shrinkage stress were greatest in Tetric EvoFlow, and the gelation time was greatest in "SDR-bulk." CONCLUSIONS The bulk application method had greater values of shrinkage vectors and a higher debonding tendency at the cavity floor. CLINICAL RELEVANCE Incremental application remains the gold standard of composite insertion.
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Rezaeian Z, Beigi-Boroujeni S, Atai M, Ebrahimibagha M, Özcan M. A novel thymol-doped enamel bonding system: Physico-mechanical properties, bonding strength, and biological activity. J Mech Behav Biomed Mater 2019; 100:103378. [PMID: 31386988 DOI: 10.1016/j.jmbbm.2019.103378] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/24/2019] [Accepted: 08/01/2019] [Indexed: 01/24/2023]
Abstract
PURPOSE Over the past decades, the preparation of antibacterial restorative dental adhesives has obtained increasing attention in order to prevent secondary caries. In the present study, a novel essential oil-based antibacterial resin adhesive was prepared and evaluated for dental applications. In this regards, thymol, which is a major phenolic component of thyme essential oil, was incorporated into methacrylate resin matrix and its effect on the physico-mechanical and biological properties of the experimental bonding agent was investigated. MATERIALS AND METHODS Mechanical properties were evaluated via measuring flexural strength, flexural modulus and fracture toughness. Degree of conversion (DC%) of monomers was measured using FTIR spectroscopy. Viscoelastic properties of the samples were also determined by dynamic mechanical thermal analysis (DMTA). The bactericidal activity of composite specimens against Streptococcus mutans (ATCC 35668) was determined based on ASTM E 2180-07.MTT assay was performed to investigate the cytocompatibility of samples. Furthermore, the bonding strength of the adhesives was evaluated through microshear bond test on the caries-free extracted human premolar teeth and the mode of failure was investigated by scanning electron microscopy. RESULTS Thymol-doped resin adhesive exhibited comparable degree of conversion to the control resin adhesive. The plasticizing behavior of thymol slightly decreased the flexural modulus and glass transition temperature of the thymol containing specimens, even though; it caused significant increases in fracture toughness of adhesive. The results represented appropriate antibacterial activity as well as suitable cytocompatibility. Furthermore, the thymol-doped resin adhesive showed comparable adhesive strength to the control. CONCLUSION The thymol is extremely compatible with the methacrylate resin restorative system and completely fulfills all requirements of a good bactericidal component in construction of an ideal enamel bonding system.
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Affiliation(s)
- Zahra Rezaeian
- Hard Tissue Engineering Research Center, Tissue Engineering and Regenerative Medicine Institute, Tehran Central Branch, Islamic Azad University, Tehran, Iran
| | - Saeed Beigi-Boroujeni
- Hard Tissue Engineering Research Center, Tissue Engineering and Regenerative Medicine Institute, Tehran Central Branch, Islamic Azad University, Tehran, Iran.
| | - Mohammad Atai
- Iran Polymer and Petrochemical Institute, Tehran, Iran
| | - Mehrnoosh Ebrahimibagha
- Hard Tissue Engineering Research Center, Tissue Engineering and Regenerative Medicine Institute, Tehran Central Branch, Islamic Azad University, Tehran, Iran
| | - Mutlu Özcan
- University of Zurich, Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zurich, Switzerland
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Almeida Junior LJDS, Lula ECDO, Penha KJDS, Correia VS, Magalhães FAC, Lima DM, Firoozmand LM. Polymerization Shrinkage of Bulk Fill Composites and its Correlation with Bond Strength. Braz Dent J 2019; 29:261-267. [PMID: 29972452 DOI: 10.1590/0103-6440201801838] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 01/15/2018] [Indexed: 11/22/2022] Open
Abstract
The present study aimed to evaluates polymerization shrinkage (PS) using microcomputed tomography (μCT) and microtensile bond strength (μTBS) in bulk fill composites (BFC) and conventional class I restorations as well as the correlation between these factors. Class I cavities (4 x 5 x 4 mm), factor-C = 4.2, were created in third molars that were free of caries, which were randomly divided in 4 groups (n = 6): XTI (Filtek Supreme XTE: incremental technique); XTB (Filtek Supreme XTE: single fill technique); TBF (Tetric Bulk Fill); and SF (SonicFill). Each tooth was scanned twice in μCT: T0 was after filling the cavity with composite, and T1 was after light curing. The data were analyzed by subtracting the composite volume for each time (T1 - T0). After 1 week, the teeth were sectioned crosswise in the buccolingual and mesiodistal directions to obtain specimens with approximately 1 mm² thickness and fixed in a universal testing machine to perform μTBS. The Kruskal-Wallis and Dunn tests showed a statistically significant difference for shrinkage in µCT among the XTI and XTB and between the SF and XTB. Regarding the μTBS, all the groups differed from XTB. Bulk fill composites type presents a PS similar to that of the conventional nanoparticulate composite inserted using the incremental technique, but the bond strength was higher for the incremental group, which presented a lower number of pre-test failures when compared to BFC. No correlation was observed between the polymerization shrinkage and bond strength in the studied composites.
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Affiliation(s)
| | | | | | - Vinicius Souza Correia
- Department of Dentistry I, UFMA - Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - Fernando Augusto Cintra Magalhães
- Department of Physiology and Pathology, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil.,Department of Pathology, Nursing School, UFMA - Universidade Federal do Maranhão, Imperatriz, MA, Brasil
| | - Darlon Martins Lima
- Department of Dentistry I, UFMA - Universidade Federal do Maranhão, São Luís, MA, Brasil
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Fallahzadeh F, Atai M, Ghasemi S, Mahdkhah A. Effect of rinsing time and surface contamination on the bond strength of silorane-based and dimethacrylate-based composites to enamel. J Clin Exp Dent 2019; 10:e1115-e1122. [PMID: 30607230 PMCID: PMC6311400 DOI: 10.4317/jced.55148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/02/2018] [Indexed: 11/16/2022] Open
Abstract
Background The aim of this study was to assess whether saliva contamination and rinsing time for 15, 30, and 60 seconds, affects the shear bond strength of silorane and methacrylate-based composites to enamel. Material and Methods Two light cure resin, P60 (3M ESPE) and Filtek LS Silorane were tested. 120 sound premolars were randomly divided into four groups of 30 teeth based on composite type with or without saliva contamination after etching and rinsing. Each group was further divided into three subgroups according to their rinsing time. Then a cylinder of the composite was bonded to the enamel and Shear bond strength was assessed. To determine the failure mode, the bonded surfaces were then observed under SEM. In addition, the DC of each group was measured at pH levels of 4 and 7 using FTIR spectroscopy. The data were analyzed with one-way ANOVA and post hoc analysis followed by Fisher’s least significant difference. Results The bond strength of the non-contaminated methacrylate group was significantly higher than the other groups (p< 0.0001). In addition, there was no significant deference between the methacrylate subgroups. In the silorane groups, the shear bond strength was higher in the rinsing time of 15 seconds. Failure pattern was mainly adhesive. The DC of the Methacrylates had no significant difference at pH 4 and pH 7, but was significantly higher than that of siloranes (p< 0.0001). While the DC of the siloranes at pH 4 was significantly higher than at pH 7 (p< 0.0001). Conclusions Saliva contamination in both composites reduces bond strength. Increasing rinsing time in Methacrylates proves ineffective. In non-contaminated siloranes, excessive rinsing time reduced bond strength. The best-recommended rinsing time for both composite is 15 seconds. Key words:Composite resins, silorane composite resin, methacrylates, shear strength.
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Affiliation(s)
- Farnoosh Fallahzadeh
- Assistant Professor of Operative Dentistry, Faculty of dentistry, Qazvin University of medical science, Qazvin, Iran
| | - Mohammad Atai
- Professor of Polymer Science, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran
| | | | - Ailin Mahdkhah
- Post-graduate Student of Operative Dentistry, Faculty of Dentistry, Qazvin University of Medical Science, Qazvin, Iran
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Han SH, Sadr A, Shimada Y, Tagami J, Park SH. Internal adaptation of composite restorations with or without an intermediate layer: Effect of polymerization shrinkage parameters of the layer material. J Dent 2018; 80:41-48. [PMID: 30391684 DOI: 10.1016/j.jdent.2018.10.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 10/19/2018] [Accepted: 10/31/2018] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVES The purpose of this study was to compare the internal adaptation of resin composite restorations in Class I cavities with or without an intermediate layer, and to identify the relationships between the internal adaptation and the polymerization shrinkage parameters of the layer material. METHODS Class I cavities prepared in human third molars were treated with a one-step self-etch adhesive (G-Premio Bond, GC). In the control group, Tetric-EvoCeram Bulk-Fill (TBF, Ivoclar Vivadent) was placed using the bulk-fill technique and then light-cured. In the experimental groups, six different layer materials (three flowable resin composites, two bulk-fill resin composites, and a resin-modified glass-ionomer) were applied to a 1.5-mm thickness and light-cured, which was followed by TBF filling. After thermo-cycling, internal adaptation was measured using swept-source optical coherence tomography (SS-OCT) imaging and compared in terms of high brightness percentage (HB%) to represent the microgap. Shrinkage strain (SS), flexural modulus (FM), and polymerization shrinkage stress of the intermediate layer-resin composite complex (PS) were measured for each material. The relationships among HB%, SS, FM, and PS were evaluated statistically. RESULTS Groups with an intermediate layer showed lower HB% than the control group. The HB% correlated with PS (Pearson's correlation: R2 = 0.883, p < 0.05), and the PS correlated with the product of SS and FM. CONCLUSION Internal adaptation depended on the polymerization shrinkage stress of the intermediate layer-resin composite complex. CLINICAL SIGNIFICANCE Bulk-fill resin composite, which can show low polymerization shrinkage stress, may be used as an intermediate layer for better internal adaptation.
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Affiliation(s)
- Seung-Hoon Han
- Department of Conservative Dentistry, St. Vincent Hospital, College of Medicine, Catholic University of Korea, #93 Jungbu-daero, Paldal-gu, Suwon, Gyeonggi-do, South Korea.
| | - Alireza Sadr
- Department of Restorative Dentistry, School of Dentistry, University of Washington, 1959 NE Pacific St, B162, Seattle, WA, USA.
| | - Yasushi Shimada
- Department of Operative Dentistry, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525, Japan; Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 1-5-45, Japan.
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 1-5-45, Japan.
| | - Sung-Ho Park
- Department of Conservative Dentistry, Oral Science Research Center, College of Dentistry, Yonsei University, #50 Yonsei- ro, Seodaemun-gu, Seoul, Republic of Korea.
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Abstract
This article aims to review the research done on the silorane-based resin composites (SBRC) regarding polymerization shrinkage and contraction stresses and their ability to improve the shortcomings of the methacrylate-based resin composites (MRBC). Special attention is given to their physical and mechanical properties, bond strength, marginal adaptation, and cusp deflection. The clinical significance of this material is critically appraised with a focus on the ability of SBRC to strengthen the tooth structure as a direct restorative material. A search of English peer-reviewed dental literature (2003-2015) from PubMed and MEDLINE databases was conducted with the terms "low shrinkage" and "silorane composites." The list was screened, and 70 articles that were relevant to the objectives of this work were included.
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Roberto LG, Francesco P, Carmine V, Marco M, Angela A, Angelo L. Bulk vs wedge shape layering techniques in V class cavities: marginal infiltration evaluation. GIORNALE ITALIANO DI ENDODONZIA 2017. [DOI: 10.1016/j.gien.2017.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abstract
After a brief review of current restorative materials and classifications, this article discusses the latest developments in polymer-based direct filling materials, with emphasis on products and studies available in the last 10 years. This will include the more recent bulk fill composites and self-adhesive materials, for which clinical evidence of success, albeit somewhat limited, is already available. The article also introduces the latest cutting edge research topics on new materials for composite restorations, and an outlook for the future of how those may help to improve the service life of dental composite restorations.
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Affiliation(s)
- Carmem S Pfeifer
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, 2730 Southwest Moody Avenue, Room 6N036, Portland, OR 97201, USA.
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Borgia E, Baron R, Borgia JL. Quality and Survival of Direct Light-Activated Composite Resin Restorations in Posterior Teeth: A 5- to 20-Year Retrospective Longitudinal Study. J Prosthodont 2017; 28:e195-e203. [PMID: 28513897 DOI: 10.1111/jopr.12630] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2017] [Indexed: 12/27/2022] Open
Abstract
PURPOSE To analyze the clinical success of direct light-activated composite resin restorations in posterior teeth. The quality of the margins and occlusal surfaces were evaluated, as well as their survival, according to their extensions and locations. The clinical performance of posterior composite resin restorations with different compositions were compared. All restorations were performed by the first author in his private practice, in a 5- to 20-year period. MATERIALS AND METHODS Several types of composite resins, provided by different manufacturers, were placed in posterior teeth, after isolation with rubber dams. To be included in the study, the restorations had to have been in function for at least 5 years and had to have been placed between October 1993 and October 2008 by the first author. The established failure criteria were: tooth and/or restoration fracture, secondary caries, endodontic treatment, or tooth loss. Included patients must have been treated in the first author's office for at least 7 years and still in the practice through 2013; all patients had complete dental arches. Patients with removable dental prostheses or disabilities, who had moved, or who had died were excluded. Of 210 patients who fulfilled the inclusion criteria, 138 randomly selected subjects were clinically examined between November 2013 and April 2014. Of these 138 patients, 61 had received 105 direct-light-activated composite resin restorations in posterior teeth, which met the inclusion criteria. Twenty-nine patients (47.5%) underwent annual maintenance therapy. The patient-based data collected from clinical exams and personal records were recorded on a specially designed form. Age, gender, period of clinical attendance, tooth preparation, location, size, quality and longevity of the restorations, restorative materials, adhesive systems, parafunctional habits, secondary caries, and maintenance therapy were the variables evaluated. Authors were blinded to the clinical assessments. Cohen's Kappa coefficient of the quality analysis of the margins and occlusal surfaces of the restorations ranged from 0.78 to 1. Data processing was performed using Epidat software, v3.1, developed by the Consellería de Sanidade de la Xunta de Galicia with the support of PAHO-WHO and SPSS software v13.0. If the number of complete values was too small, a Kaplan-Meier curve could not be used. Therefore the Fisher's exact test, Chi-square test, Kruskal-Wallis test, and Mann-Whitney non-parametric test were indicated to analyze significant differences. RESULTS At the time of the examinations, 103 (98%) restorations were in function, and 98 (95.1%) were rated as clinically successful. Two restorations failed (2%). The observed mean survival time of restorations that remained functional was 11 years and 7 months. CONCLUSIONS In the present report, direct light-activated composite resin restorations in posterior teeth showed a high clinical success rate and long-term mean survival time. These composite resins might be considered the material of choice to restore medium, extended, and in some clinical situations, large preparations in posterior teeth.
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Affiliation(s)
- Ernesto Borgia
- Postgraduate School, School of Dentistry, Montevideo, Uruguay
| | - Rosario Baron
- Department of Operative Dentistry, School of Dentistry, Montevideo, Uruguay
| | - Jose Luis Borgia
- Department of Prosthodontics, School of Dentistry, Montevideo, Uruguay
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Marginal integrity of low-shrinking versus methacrylate-based composite: effect of different one-step self-etch adhesives. Odontology 2016; 105:291-299. [PMID: 27803985 DOI: 10.1007/s10266-016-0274-1] [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: 03/15/2016] [Accepted: 07/19/2016] [Indexed: 10/20/2022]
Abstract
The aim of the study was to evaluate the influence of composite type and adhesive system on the quality of marginal adaptation in standardized Class V cavities before and after thermo-mechanical loading (TML). The cavities were restored using different combinations of three adhesive systems [(Silorane System Adhesive (SSA), Clearfil S3 Bond (S3), G-Bond (G-B)] and two resin composite materials (Filtek Silorane, Clearfil AP-X). Six groups (n = 10): Group A (SSA-Primer + SSA-Bond, Filtek Silorane), Group B (SSA-Primer + SSA-Bond, Clearfil AP-X), Group C (S3 + SSA-Bond, Filtek Silorane), Group D (S3 + SSA-Bond, Clearfil AP-X), Group E (G-B + SSA-Bond, Filtek Silorane) and Group F (G-B + SSA-Bond, Clearfil AP-X) were defined. Marginal adaptation was assessed on replicas in the SEM at 200 × magnification before and after TML (3000 × 5-55 °C, 1.2 106 × 49 N; 1.7 Hz) under simulated dentinal fluid. The highest scores of continuous margins (%CM) were observed in the group F (G-B + SSA-Bond, Clearfil AP-X: before loading 96.4 (±3.2)/after loading 90.8 (±7.0)). A significant effect of adhesive system, composite type and loading interval was observed on the results (p < 0.05). Significantly lower scores of %CM were observed for silorane-based composite (Filtek Silorane) after TML in comparison with methacrylate-based composite (Clearfil AP-X) considering total marginal length (p < 0.05). For both Filtek Silorane and Clearfil AP-X, G-Bond performed significantly better than SSA-Primer and Clearfil S3 Bond (p < 0.05). For all combinations of one-step self-etch adhesives and SSA-Bond resin coating, silorane-based low-shrinking composite exhibited inferior marginal adaptation than did the methacrylate-based composite.
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Radiopacity of Methacrylate and Silorane Composite Resins Using a Digital Radiographic System. ScientificWorldJournal 2016; 2016:6389347. [PMID: 27722199 PMCID: PMC5046049 DOI: 10.1155/2016/6389347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 07/16/2016] [Accepted: 08/16/2016] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to evaluate the radiopacity of silorane and methacrylate resin composites, comparing them to the enamel, dentin, and aluminum penetrometer using a digital image. From six resin composites (Filtek™ P90, Filtek Z350, Filtek Z350 XT flow, Tetric Ceram, TPH Spectrum, and SureFil SDR flow) cylindrical disks (5 × 1 mm) were made and radiographed by a digital method, together with a 15-step aluminum step-wedge and a 1 mm slice of human tooth. The degree of radiopacity of each image was quantified using digital image processing. The mean values of the shades of gray of the tested materials were measured and the equivalent width of aluminum was calculated for each resin. The results of our work yielded the following radiopacity values, given here in descending order: Tetric Ceram > TPH > SDR > Z350 > Z350 flow > P90 > enamel > dentin. The radiopacity of the materials was different both for the enamel and for the dentin, except for resin P90, which was no different than enamel. In conclusion, silorane-based resin exhibited a radiopacity higher than dentin and closest to the enamel; a large portion of the methacrylate-based flow and conventional resins demonstrated greater radiopacity in comparison to dentin and enamel.
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Miletic V, Pongprueksa P, De Munck J, Brooks NR, Van Meerbeek B. Curing characteristics of flowable and sculptable bulk-fill composites. Clin Oral Investig 2016; 21:1201-1212. [PMID: 27383375 DOI: 10.1007/s00784-016-1894-0] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 06/22/2016] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The aim of this study was to determine and correlate the degree of conversion (DC) with Vickers hardness (VH) and translucency parameter (TP) with the depth of cure (DoC) of five bulk-fill composites. MATERIALS AND METHODS Six specimens per group, consisting of Tetric EvoCeram Bulk Fill ("TEC Bulk," Ivoclar Vivadent), SonicFill (Kerr), SDR Smart Dentin Replacement ("SDR," Dentsply), Xenius base ("Xenius," StickTech; commercialized as EverX Posterior, GC), Filtek Bulk Fill flowable ("Filtek Bulk," 3M ESPE), and Tetric EvoCeram ("TEC," control), were prepared for DC and VH: two 2-mm-thick layers, each light-cured for 10 s; one 4-mm bulk-fill, light-cured for 10 or 20 s; and one 6-mm bulk-fill, cured for 20 s. DC was measured using a Fourier-transform infrared spectrometer, VH using a Vickers hardness tester. DoC and TP were measured using an acetone-shaking test and a spectrophotometer, respectively. Data were analyzed using ANOVA and Pearson's correlation (α = 0.05). RESULTS DC and VH ranged between 40-70 % and 30-80 VHN, respectively. TEC Bulk, Xenius, and SonicFill, bulk-filled as 4-mm-thick specimens, showed bottom-to-top hardness ratios above 80 % after 20 s curing. A positive linear correlation was found for bottom DC and VH. An average DC ratio of 0.9 corresponded to a bottom-to-top VH ratio of 0.8. CONCLUSIONS Sculptable bulk-fills require 20 s, whereas 10 s curing time was sufficient for flowable bulk-fills using a high-intensity LED unit. CLINICAL RELEVANCE Clinicians should be aware that longer curing times may be required for sculptable than flowable bulk-fill composites in order to achieve optimal curing characteristics.
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Affiliation(s)
- Vesna Miletic
- BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, block a - box, 7001, Leuven, Belgium
- School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Pong Pongprueksa
- BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, block a - box, 7001, Leuven, Belgium
| | - Jan De Munck
- BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, block a - box, 7001, Leuven, Belgium
| | - Neil R Brooks
- Department of Chemistry, KU Leuven (University of Leuven), Leuven, Belgium
| | - Bart Van Meerbeek
- BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, block a - box, 7001, Leuven, Belgium.
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Samimi P, Alizadeh V, Fathpour K, Mazaheri H, Mortazavi V. In-vitro comparison of the effect of different bonding strategies on the micro-shear bond strength of a silorane-based composite resin to dentin. Dent Res J (Isfahan) 2016; 13:124-31. [PMID: 27076826 PMCID: PMC4810909 DOI: 10.4103/1735-3327.178197] [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] [Indexed: 11/08/2022] Open
Abstract
Background: The current study evaluated the micro-shear bond strengths of a new low-shrinkage composite resin to dentin. Materials and Methods: In this in-vitro study, 70 extracted premolars were assigned to one of seven groups (n = 10): Group 1: OptiBond Solo Plus (Opt; Kerr); Group 2: SE Bond (SE; Kuraray); Group 3: Silorane System Adhesive (SSA; 3M ESPE); Group 4: OptiBond Solo Plus + LS Bond (Opt LS); Group 5: SE Bond + LS Bond (SE LS); Group 6: OptiBond Solo Plus (Opt Po); and Group 7: SE Bond (SE Po). Occlusal dentin was exposed and restored with Filtek LS (3M ESPE) in groups 1 to 5 and Point 4 (Kerr) in groups 6 and 7. After thermocycling (1000 cycles at 5/55C), micro-shear bond test was carried out to measure the bond strengths. The results were submitted to analysis of variance and post hoc Tukeytests (P < 0.05). Results: Two-way ANOVA showed no significant differences between the two types of composite resin (P = 0.187), between bonding agents (P = 0.06) and between composite resin and bonding agents (P = 0.894). Because P value of bonding agents was near the significance level, one-way ANOVA was used separately between the two composite groups. This analysis showed significant differences between silorane composite resin groups (P = 0.045) and Tukey test showed a significant difference between Groups 4 and 5 (P = 0.03). Conclusion: The application of total-etch and self-etch methacrylate-based adhesives with and without use of a hydrophobic resin coating resulted in acceptable bond strengths.
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Affiliation(s)
- Pouran Samimi
- Dental Material Research Center and Department of Restorative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Vahid Alizadeh
- Graduate, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Restorative Dentistry, Zahedan University of Medical Sciences, Isfahan, Iran
| | - Kamyar Fathpour
- Dental Material Research Center and Department of Restorative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hamid Mazaheri
- Dental Material Research Center and Department of Restorative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Vajihosadat Mortazavi
- Torabinejad Dental Research Center and Department of Restorative Dentistry and Material Engineering, Biomaterial Research Group, University of Technology, Isfahan, Iran
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Koohpeima F, Sharafeddin F, Jowkar Z, Ahmadzadeh S, Mokhtari MJ, Azarian B. Role of TiF4 in Microleakage of Silorane and Methacrylate-based Composite Resins in Class V Cavities. J Contemp Dent Pract 2016; 17:240-247. [PMID: 27207205 DOI: 10.5005/jp-journals-10024-1834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIM This study investigated the effect of TiF4 solution pretreat-ment on microleakage of silorane and nanofilled methacrylate-based composites in class V cavities. MATERIALS AND METHODS Forty-eight intact premolar teeth were randomly allocated to four groups of 12 teeth. Restorative techniques after standard class V tooth preparations were as follows: Group 1, Filtek P90 composite; group 2, Filtek Z350 XT; group 3, TiF4 solution pretreatment and Filtek P90 composite; group 4, TiF4 solution pretreatment and Filtek Z350 XT. After storing the specimens in distilled water at 37°C for 24 hours and followed by immersion of the specimens in a 0.5% basic-fuchsin solution for 24 hours, they were sectioned buccolingually to obtain four surfaces for each specimen for analysis of microleakage using a stereomicroscope. Data analysis was performed using Kruskal-Wallis test to compare the four groups and the Mann-Whitney test for paired comparisons with Statistical Package for the Social Sciences (SPSS) version 17 software. RESULTS At the enamel margins, microleakage score of the Filtek Z350 XT group was lower than those of the Filtek P90 with and without the application of the TiF4 (p = 0.009 and p = 0.031 respectively). At the dentin margins, groups 3 and 4 (TiF4+Filtek P90 and TiF4+Filtek z350 XT respectively) showed significantly lower microleakage than group 1 (Filtek P90). However, there was no significant difference between other groups (p > 0.05). CONCLUSION At the enamel margins, microleakage score of the silorane-based composite was more than that of the nanofilled composite. No significant differences were observed between the other groups. At the dentin margins, for the silorane-based composite restorations, TiF4 solution pretreatment resulted in significantly lower microleakage. However, the similar result was not observed for Filtek Z350 XT. Also, no significant difference was observed between microleakage scores of Filtek P90 and Filtek Z350 XT with or without TiF4 pretreatment. CLINICAL SIGNIFICANCE In spite of better mechanical and physical properties of modern composites than earlier methacrylate-based composites, polymerization shrinkage has been remaining as one of the main shortcomings of them. Different methods, such as using new low shrinkage resin composites and different dentin pretreatments, have been suggested to overcome this problem. This study evaluated the effect of TiF4 as pretreatment on microleakage of class V tooth preparations restored with a nanocomposite and a silorane-based resin composite.
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Affiliation(s)
- Fatemeh Koohpeima
- Department of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran
| | - Farahnaz Sharafeddin
- Professor, Department of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran, Phone: 36263193 e-mail:
| | - Zahra Jowkar
- Department of Operative Dentistry, School of Dentistry Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran
| | - Samaneh Ahmadzadeh
- Department of Operative Dentistry, School of Dentistry Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran
| | - Mohammad Javad Mokhtari
- Department of Biology, Elite Club, Zarghan Branch, Islamic Azad University, Zarghan, Islamic Republic of Iran
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Pereira JR, Júnior LC, de Souza Almeida M, do Valle AL, Honório HM, Vidotti HA, De Souza GM. Effect of silorane-based adhesive system on bond strength between composite and dentin substrate. J Conserv Dent 2016; 18:488-91. [PMID: 26752846 PMCID: PMC4693325 DOI: 10.4103/0972-0707.168833] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
CONTEXT The complexities of the oral environment, the dentin substrate, and the different bond and composite resin systems represent a challenge to the maintenance of reasonable bond between the composite resin and the tooth structure. AIMS To evaluate the effect of the adhesive system on bond strength between silorane-based composite resin and dentin. MATERIALS AND METHODS Fourteen human molars extracted were selected and vertically cut into 3 dentin fragments, randomly divided among the experimental groups and restored with Z250 and P90 composite resin using different adhesive protocols (Adper Single Bond 2, Silorano primer, Adper SE Plus, and Scotchbond Multiuse). Two composite resin cylinders were built up on each dentin surface (n = 10) and subjected to a micro-shear bond strength test. STATISTICAL ANALYSIS USED Kruskal-Wallis one-way analysis of variance and Tukey test (P = 0.05). RESULTS According to the results, Kruskal-Wallis test evidenced at least one statistical significant difference (P = 0.001). The Tukey test showed statistically significant differences among the group (P < 0.05). Group PSM8 (P90 + SM) showed statically significant higher results when compared with groups PSP4 (P90 + SP), PSB2 (P90 + SB), and ZSE5 (Z250 + SE). CONCLUSION The results evidenced that the monomer of the adhesive system has an effect on bond strength between the composite resin and dentin.
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Affiliation(s)
- Jefferson Ricardo Pereira
- Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - Lindomar Corrêa Júnior
- Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - Mauro de Souza Almeida
- Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil
| | | | - Heitor Marques Honório
- Department of Pediatric Dentistry, Orthodontics and Community Health, University of São Paulo, Bauru, São Paulo, Brazil
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MACHADO FW, BORGES FB, CENCI MS, MORAES RRD, BOSCATO N. Effect of filling technique on the bond strength of methacrylate and silorane-based composite restorations. Braz Oral Res 2016; 30:S1806-83242016000100237. [DOI: 10.1590/1807-3107bor-2016.vol30.0044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 02/17/2016] [Indexed: 11/21/2022] Open
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Al-Harbi F, Kaisarly D, Michna A, ArRejaie A, Bader D, El Gezawi M. Cervical Interfacial Bonding Effectiveness of Class II Bulk Versus Incremental Fill Resin Composite Restorations. Oper Dent 2015; 40:622-35. [DOI: 10.2341/14-152-l] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Cervical interfacial bonding quality has been a matter of deep concern. The purpose of this study was to analyze microtensile bond strength (MTBS) and cervical interfacial gap distance (IGD) of bulk-fill vs incremental-fill Class II composite restorations. Box-only Class II cavities were prepared in 91 maxillary premolars (n = 7) with gingival margin placement 1 mm above the cementoenamel junction at one side and 1 mm below it on the other side. Eighty-four maxillary premolars were divided into self-etch and total-etch groups and further subdivided into six restorative material subgroups used incrementally and with an open-sandwich technique: group 1, Tetric Ceram HB (TC) as a control; group 2, Tetric EvoFlow (EF); group 3, SDR Smart Dentin Replacement (SDR); group 4, SonicFill (SF); group 5, Tetric N-Ceram Bulk Fill (TN); and group 6, Tetric EvoCeram Bulk Fill (TE). Groups 2-6 were bulk-fill restoratives. Tetric N-Bond Self-Etch (se) and Tetric N-Bond total-etch (te) adhesive were used in subgroups 1–5, whereas AdheSE (se) and ExciTE F (te) were used in subgroup 6. In an additional group, Filtek P90 Low Shrink Restorative (P90) was used only with its corresponding self-etch bond. The materials were manipulated, light-cured (1600 mW/cm2), artificially aged (thermal and occlusal load-cycling), and sectioned. Two microrods/restoration (n = 14/group) were tested for MTBS at a crosshead-speed of 0.5 mm/min (Instron testing machine). Fracture loads were recorded (Newtons), and MTSBs were calculated (Megapascals). Means were statistically analyzed by the Kruskal-Wallis test, Conover-Inman post hoc analysis for MTBS (multiple comparisons), and Mann-Whitney U test for IGD. The ends of the fractures were examined for failure mode. One microrod/restoration (n = 7/group) was investigated by scanning electron microscopy (×1200) for IGD.
MTBS values for SF/te, P90 in enamel, and TC+SDR/te in enamel and cementum were significantly higher compared with those for the control TC/te and TC/se in cementum. Most of the failures were mixed. IGDs were generally smaller at enamel margins, and the smallest IGDs were found in P90 at both enamel and cementum margins. Bulk-fill and silorane-based composites might provide better cervical interfacial quality than incremental-fill restorations.
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Affiliation(s)
- F Al-Harbi
- Fahad Al-Harbi, BDS, MSD, DScD, FACP, Department of Substitutive Dental Sciences, College of Dentistry, University of Dammam, Dammam, Saudi Arabia
| | - D Kaisarly
- Dalia Kaisarly, BDS, MDSc, PhD, Department of Restorative Dentistry, University of Munich, Munich, Germany, and Biomaterials Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| | - A Michna
- Agata Michna, BEng, MScEng, BEng, MScEng, Research Unit of Radiation Cytogenetics, Helmholtz Zentrum München, Munich, Germany
| | - A ArRejaie
- Aws ArRejaie, BDS, DScD, FRCD, Department of Substitutive Dental Sciences, College of Dentistry, University of Dammam, Dammam, Saudi Arabia
| | - D Bader
- Dana Bader, Restorative Dental Sciences Department, College of Dentistry, University of Dammam, Dammam, Saudi Arabia
| | - M El Gezawi
- Moataz El Gezawi, BDS, MDSc, DDSc, Restorative Dental Sciences Department, College of Dentistry, University of Dammam, Dammam, Saudi Arabia
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Singh TV, Patil JP, Raju RC, Venigalla BS, Jyotsna SV, Bhutani N. Comparison of Effect of C-Factor on Bond Strength to Human Dentin Using Different Composite Resin Materials. J Clin Diagn Res 2015; 9:ZC88-91. [PMID: 26436056 DOI: 10.7860/jcdr/2015/14026.6384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 07/08/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND The study was planned to assess the use of low shrinkage composites for restoring cavities with high configuration factor (C-factor) which are subjected to high stresses. AIM The aim of the study was to evaluate the effect of C- factor on tensile bond strength to human dentin using methacrylate based nanohybrid and low shrinkage silorane composite. MATERIALS AND METHODS In this study 40 non carious human molar teeth were selected and assigned into two main groups - cavity (Class I cavity with high C-factor) and flat group (flat surface with low C-factor). Two different composite materials- methacrylate based and silorane low shrinkage composite were used to restore the teeth. Dentin surface was treated, adhesive application was done and composite was applied as per manufacturer's instructions. Samples were stored in distilled water then subjected to tensile bond strength measurement using universal testing machine. RESULTS Statistical analysis was done using Independent sample t-test. The mean bond strength in methacrylate based and silorane composite was significantly higher in flat preparation (Low C-factor) than cavity preparation. The mean bond strength in both cavity (High C-factor) and flat preparation(Low C-factor) was significantly higher in silorane than in conventional methacrylate based composite. CONCLUSION The bond strength of composites to dentin is strongly influenced by C-factor and type of composite resin material used.
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Affiliation(s)
- Thakur Veerandar Singh
- Senior Lecturer, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, India
| | - Jaya Prakash Patil
- Professor and Head, Department of Conservative Dentistry and Endodontics, PMNM Dental College , Bagalkot, India
| | - Rvs Chakradhar Raju
- Professor and Head, Department of Conservative Dentistry and Endodontics, Sri Balaji Dental College , Moinabad, India
| | - Bhuvan Shome Venigalla
- Professor and Head, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, India
| | - S V Jyotsna
- Senior Lecturer, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, India
| | - Neha Bhutani
- Senior Lecturer, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, India
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Bacchi A, Feitosa VP, da Silva Fonseca ASQ, Cavalcante LMA, Silikas N, Schneider LFJ. Shrinkage, stress, and modulus of dimethacrylate, ormocer, and silorane composites. J Conserv Dent 2015; 18:384-8. [PMID: 26430302 PMCID: PMC4578183 DOI: 10.4103/0972-0707.164051] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Purpose: to evaluate the shrinkage, polymerization stress, elastic and bulk modulus resulting from composites formulated by siloranes, 2nd generation ormocers, and dimethacrylates. Materials and Methods: The bonded disc method was used to evaluate volumetric shrinkage. The polymerization stress was evaluated by mean of the Bioman. Cylindrical specimens (5 mm thickness and 6 mm diameter) were submitted to gradual loading. Young's and bulk modulus were obtained from the slope of the stress/strain curve. Data were analyzed using one-way analysis of variance and Tukey's test (5%). Results: Grandio and ormocer showed significant higher elastic and bulk modulus. Silorane presented significant lowest bulk modulus and maximum shrinkage. Ormocer and silorane presented lower values for the maximum rate of shrinkage. Extra-low shrinkage (ELS) composite presented the greatest maximum shrinkage. The higher maximum rate of shrinkage was attained by Grandio and ELS, statistically similar from each other. The silorane showed lower values of maximum stress and maximum rate of stress. The higher values of maximum stress were presented by ELS and Grandio, statistical similar between them. Grandio showed the significantly greatest maximum rate of stress. Conclusion: Silorane showed to promote lower shrinkage/stress among the composites, with the lowest elastic modulus. Ormocer showed lower shrinkage/stress than methacrylates despite of its high modulus.
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Affiliation(s)
- Atais Bacchi
- Department of Prosthetic Dentistry, School of Dentistry, Meridional Faculty - IMED, Passo Fundo, RS, Brazil
| | - Victor Pinheiro Feitosa
- Department of Restorative Dentistry, School of Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | | | | | - Nikolaos Silikas
- Biomaterials Science Research Group, School of Dentistry, University of Manchester, Manchester, United Kingdom
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Abstract
OBJECTIVES The objective of this article is to discuss the evidence for polymerization shrinkage and shrinkage stress of dental composite restoratives in terms of its potential relevance to the clinical situation METHODS Articles relating to the issue of polymerization contraction stress generation in dental composite materials, and the factors that influence it, were reviewed and included. Particular attention was paid to evidence derived from clinical studies. Articles were identified through PubMed and through the bibliographies of other articles. RESULTS There is extensive evidence for the presence of polymerization contraction stress in dental composites, as well as evidence for its deleterious effects, which include marginal leakage, gap formation, cuspal deflection, tooth cracking, reduced bond strength and lowered mechanical properties of the restorative. There is little, if any, direct evidence for the clinical effect of these contraction stresses. No study has directly established a link between these stresses and enhanced postoperative sensitivity or recurrent caries, for example. However, the concern over these stresses and the manner in which they influence the placement of current composite materials demonstrates that they are considered to be very important. CONCLUSION Though no direct evidence exists to prove that the generation of contraction stress in dental composite restorations causes reduced clinical longevity, the indirect evidence from numerous in vitro studies and the concern over controlling their effects proves that they are clinically relevant.
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Affiliation(s)
- Jack L Ferracane
- Department of Restorative Dentistry, Oregon Health & Science University, Portland, OR 97201, USA.
| | - Thomas J Hilton
- Department of Restorative Dentistry, Oregon Health & Science University, Portland, OR 97201, USA.
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Taha N, Maghaireh G, Bagheri R, Abu Holy A. Fracture strength of root filled premolar teeth restored with silorane and methacrylate-based resin composite. J Dent 2015; 43:735-41. [DOI: 10.1016/j.jdent.2015.01.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 01/20/2015] [Accepted: 01/23/2015] [Indexed: 10/24/2022] Open
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Benetti AR, Havndrup-Pedersen C, Honoré D, Pedersen MK, Pallesen U. Bulk-Fill Resin Composites: Polymerization Contraction, Depth of Cure, and Gap Formation. Oper Dent 2015; 40:190-200. [DOI: 10.2341/13-324-l] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
The bulk-filling of deep, wide dental cavities is faster and easier than traditional incremental restoration. However, the extent of cure at the bottom of the restoration should be carefully examined in combination with the polymerization contraction and gap formation that occur during the restorative procedure. The aim of this study, therefore, was to compare the depth of cure, polymerization contraction, and gap formation in bulk-fill resin composites with those of a conventional resin composite. To achieve this, the depth of cure was assessed in accordance with the International Organization for Standardization 4049 standard, and the polymerization contraction was determined using the bonded-disc method. The gap formation was measured at the dentin margin of Class II cavities. Five bulk-fill resin composites were investigated: two high-viscosity (Tetric EvoCeram Bulk Fill, SonicFill) and three low-viscosity (x-tra base, Venus Bulk Fill, SDR) materials. Compared with the conventional resin composite, the high-viscosity bulk-fill materials exhibited only a small increase (but significant for Tetric EvoCeram Bulk Fill) in depth of cure and polymerization contraction, whereas the low-viscosity bulk-fill materials produced a significantly larger depth of cure and polymerization contraction. Although most of the bulk-fill materials exhibited a gap formation similar to that of the conventional resin composite, two of the low-viscosity bulk-fill resin composites, x-tra base and Venus Bulk Fill, produced larger gaps.
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Affiliation(s)
- AR Benetti
- Ana R Benetti, DDS, MSc, PhD, assistant professor, Department of Odontology, University of Copenhagen, Copenhagen, Denmark
| | - C Havndrup-Pedersen
- Cæcilie Havndrup-Pedersen, undergraduate dental student, Department of Odontology, University of Copenhagen, Copenhagen, Denmark
| | - D Honoré
- Daniel Honoré, undergraduate dental student, Department of Odontology, University of Copenhagen, Copenhagen, Denmark
| | - MK Pedersen
- Maiken K Pedersen, undergraduate dental student, Department of Odontology, University of Copenhagen, Copenhagen, Denmark
| | - U Pallesen
- Ulla Pallesen, DDS, chief dental officer, Department of Odontology, University of Copenhagen, Copenhagen, Denmark
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Beigi Burujeny S, Atai M, Yeganeh H. Assessments of antibacterial and physico-mechanical properties for dental materials with chemically anchored quaternary ammonium moieties: thiol-ene-methacrylate vs. conventional methacrylate system. Dent Mater 2015; 31:244-61. [PMID: 25605414 DOI: 10.1016/j.dental.2014.12.014] [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: 06/03/2014] [Revised: 11/09/2014] [Accepted: 12/16/2014] [Indexed: 01/18/2023]
Abstract
OBJECTIVE Fabrication of low shrinkage stress and strain dental resins containing highly available immobilized bactericidal moieties has been reported. The goal of this study is producing dental restorative materials with long-last antibacterial activity and reduced secondary caries. It is anticipated that antibacterial properties of quaternary ammonium moieties chemically immobilized in the backbone of dental resins is directly depended on accessibility of these functions. In the present study the antibacterial effect of a series of antibacterial monomers polymerized in a ternary thiol-ene-methacrylate system were compared with corresponding classical methacrylate system against Streptococcus mutans (an oral bacteria Strain). Physical and mechanical properties of dental materials obtained from these two systems were also evaluated and compared. METHODS The viscosities of the resin matrixes were measured on a MCR 300 rheometer. Degree of conversion (DC%) of monomers was measured using FTIR spectroscopy. The shrinkage-strain of photocured resins was measured using the bonded-disk technique. A universal testing machine combined with a stress measurement device was utilized to measure the polymerization-induced shrinkage stress. Viscoelastic properties of the samples were also determined by dynamic mechanical thermal analysis (DMTA). Assessment of antibacterial properties was performed through agar diffusion test (AD) to confirm non-release behavior of chemically anchored moieties. Quantitative assay of antibacterial activity was evaluated through direct contact test (DCT) against S. mutans. Direct contact cytotoxicity assay with fibroblast cell line L-929 was also performed to find more insight regarding cytotoxicity of the antibacterial matrixes. The data were analyzed and compared by ANOVA and Tukey HSD tests (significance level=0.05). RESULTS Neat methacrylate systems had significantly higher viscosity than thiol-ene-methacrylate analogous. The degree of conversion of methacrylate moieties in thiol-ene-methacrylate system was improved in comparison to conventional methacrylate system. Shrinkage stress and strain of thiol-ene-methacrylate system was lower than the neat methacrylate system. The thiol-ene-methacrylate systems show increased homogeneity and decreased glass transition temperature (Tg) and crosslink density (νc) in comparison to the neat methacrylate-based resins. The incorporated monofuctional quaternized monomer reduces degree of conversion, shrinkage stress and crosslink density of matrix. The results showed significant improvement in antibacterial activity and cytocompatibility of dental materials obtained from thiol-ene polymerization system. SIGNIFICANCE It was shown that with proper control of monomers molar ratio, significant improvement in antibacterial activity and cytocompatibility as well as acceptable mechanical properties can be attained for dental resins prepared through the application of thiol-ene polymerization methodology.
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Affiliation(s)
- Saeed Beigi Burujeny
- Iran Polymer and Petrochemical Institute, PO Box 14965-115, Tehran 1497713115, Iran
| | - Mohammad Atai
- Iran Polymer and Petrochemical Institute, PO Box 14965-115, Tehran 1497713115, Iran
| | - Hamid Yeganeh
- Iran Polymer and Petrochemical Institute, PO Box 14965-115, Tehran 1497713115, Iran.
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Moosavi H, Maleknejad F, Forghani M, Afshari E. Evaluating Resin-Dentin Bond by Microtensile Bond Strength Test: Effects of Various Resin Composites and Placement Techniques. Open Dent J 2015; 9:409-13. [PMID: 26966466 PMCID: PMC4765507 DOI: 10.2174/1874210601509010409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/13/2015] [Accepted: 10/08/2015] [Indexed: 11/22/2022] Open
Abstract
Objectives: This in vitro study evaluated the microtensile bond strength (MTBS) of a methacrylate-based compared to a silorane-based resin composite in Class I cavity using different placement techniques. Materials and Methods: Class I cavities with dimension of (4 mm long, 4 mm wide, 3 mm deep) were prepared in extracted sound human molars. The teeth were randomly divided into six groups. The first three groups were filled with Filtek P90 using three methods of insertion; bulk, incremental and snow-plow, and the remaining three groups were filled with Clearfil AP-X using the same three placement techniques. After 24 hours of storage in water at 37°C, the specimens were thermocycled to 1000 cycles. Specimens were prepared for MTBS testing by creating bonded beams obtained from the pulpal floor. Statistical analysis used: Statistical analyses of data were performed by two-way ANOVA/Tukey (α=.05). Results: The experiment showed significant differences between the two resin composites with regard to filling techniques (P<0.05). The MTBS was significantly higher in each of Filtek P90 subgroup compared to Clearfil AP-X ones (P<0.05). With respect to filling technique in both resin composites, bulk insertion showed the significantly lowest MTBS (P<0.05), while no significant difference was found between the outcome of incremental and snow-plow techniques (P>0.05). Conclusion: Silorane-based resin composite as opposed to methacrylate based resin composite and layering placements in contrast to bulk filling method had higher microtensile bond strength.
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Affiliation(s)
- Horieh Moosavi
- Dental Materials Research Center and Department of Operative Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fatemeh Maleknejad
- Dental Materials Research Center and Department of Operative Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Forghani
- Dental Research Center and Department of Endodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Elham Afshari
- Post Graduate Student of Pediatrics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
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Anchieta RB, Machado LS, Martini AP, Santos PHD, Giannini M, Janal M, Tovar N, Sundfeld RH, Rocha EP, Coelho PG. Effect of long-term storage on nanomechanical and morphological properties of dentin-adhesive interfaces. Dent Mater 2014; 31:141-53. [PMID: 25529501 DOI: 10.1016/j.dental.2014.11.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 08/23/2014] [Accepted: 11/14/2014] [Indexed: 11/25/2022]
Abstract
INTRODUCTION To evaluate the influence of storage time on the elastic modulus, micromorphology, nanoleakage, and micromechanical behavior of the dentin-adhesive interfaces of five adhesive systems (Scotchbond Multi-Purpose, Clearfil SE Bond, One Up Bond F, Adper Easy One, and Filtek LS Adhesive) after 24h (T0) and 12 months (T1). METHODS Fifty teeth were restored and distributed according to each adhesive system (n=10). At least four specimens were obtained from each tooth. One specimen was evaluated under SEM to obtain the micromorphology of dentin-adhesive interface (DAI). Two specimens were used to assess nanoleakage, one tested in T0 and the other in T1. The last specimen was used for nanoindentation, in T0 and T1, to obtain the initial and final mechanical properties of DAI structures. Two non-restored teeth were evaluated under SEM to obtain the dentin morphology. Laboratorial data were used to build 15 finite element models to assess the maximum principal stress in each time of analysis. RESULTS Storage resulted in hydrolysis of the dentin-adhesive interfaces for all groups. Silver impregnation increased for all groups after 1 year storage (p<.05), except for Clearfil SE Bond. In general, a decrease in elastic modulus values was observed for all groups from T0 to T1 (p<.05), mainly at the hybrid layer. The FEAs showed higher stress levels at T1 than T0 simulations for all adhesives. CONCLUSION At T1, degradation occurred at the dentin-adhesive interface formed by all adhesives, and the intensity of degradation differed depending on the type of adhesive system used. The interface formed by the self-etching primer containing the 10-MDP functional monomer showed the highest stability among the adhesive systems after 12 months of storage.
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Affiliation(s)
- Rodolfo Bruniera Anchieta
- Univ. Estadual Paulista-UNESP Araçatuba Dental School, Department of Dental Materials and Prosthodontics, Araçatuba, SP, Brazil; New York University, Department of Biomaterial and Biomimetics, New York, NY, USA.
| | - Lucas Silveira Machado
- Univ. Estadual Paulista -UNESP Araçatuba Dental School, Department of Restorative Dentistry, Araçatuba, SP, Brazil; New York University, Department of Biomaterial and Biomimetics, New York, NY, USA
| | - Ana Paula Martini
- Univ. Estadual Paulista-UNESP Araçatuba Dental School, Department of Dental Materials and Prosthodontics, Araçatuba, SP, Brazil
| | - Paulo Henrique dos Santos
- Univ. Estadual Paulista-UNESP Araçatuba Dental School, Department of Dental Materials and Prosthodontics, Araçatuba, SP, Brazil; Univ. Estadual Paulista -UNESP Araçatuba Dental School, Department of Restorative Dentistry, Araçatuba, SP, Brazil
| | - Marcelo Giannini
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil
| | - Malvin Janal
- New York University, Department of Biomaterial and Biomimetics, New York, NY, USA
| | - Nick Tovar
- New York University, Department of Biomaterial and Biomimetics, New York, NY, USA
| | - Renato Herman Sundfeld
- Univ. Estadual Paulista -UNESP Araçatuba Dental School, Department of Restorative Dentistry, Araçatuba, SP, Brazil
| | - Eduardo Passos Rocha
- Univ. Estadual Paulista-UNESP Araçatuba Dental School, Department of Dental Materials and Prosthodontics, Araçatuba, SP, Brazil
| | - Paulo G Coelho
- New York University, Department of Biomaterial and Biomimetics, New York, NY, USA
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Pişkin MB, Atalı PY, Figen AK. Thermal, spectral, and surface properties of LED light-polymerized bulk fill resin composites. BIOMED ENG-BIOMED TE 2014; 60:65-75. [PMID: 25296670 DOI: 10.1515/bmt-2014-0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 09/16/2014] [Indexed: 11/15/2022]
Abstract
The aim of this study was to evaluate the thermal, spectral, and surface properties of four different bulk fill materials – SureFil SDR (SDR, Dentsplay DETREY), QuixFil (QF, Dentsplay DETREY), X-tra base (XB, Voco) X-tra fil (XF, Voco) – polymerized by light-emitting diode (LED). Resin matrix, filler type, size and amount, and photoinitiator types influence the degree of conversion. LED-cured bulk fill composites achieved sufficient polymerization. Scanning electron microscope (SEM) analysis revealed different patterns of surface roughness, depending on the composite material. Bulk fill materials showed surface characteristics similar to those of nanohybrid composites. Based on the thermal analysis results, glass transition (T(g)) and initial degradation (T(i)) temperatures changed depending on the bulk fill resin composites.
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Barutcigil Ç, Harorlı OT, Özcan E, Arslan H, Yıldız M. Effects of ethylenediaminetetraacetic acid and sodium hypochlorite on the bond strength of bonding agents to pulp chamber lateral walls. J Dent Sci 2014. [DOI: 10.1016/j.jds.2012.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Bastos LA, Sousa ABS, Drubi-Filho B, Panzeri Pires-de-Souza FDC, Garcia LDFR. Microtensile bond strength of silorane-based composite specific adhesive system using different bonding strategies. Restor Dent Endod 2014; 40:23-9. [PMID: 25671209 PMCID: PMC4320273 DOI: 10.5395/rde.2015.40.1.23] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 08/06/2014] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES The aim of this study was to evaluate the effect of pre-etching on the bond strength of silorane-based composite specific adhesive system to dentin. MATERIALS AND METHODS Thirty human molars were randomly divided into 5 groups according to the different bonding strategies. For teeth restored with silorane-based composite (Filtek Silorane, 3M ESPE), the specific self-etching adhesive system (Adhesive System P90, 3M ESPE) was used with and without pre-etching (Pre-etching/Silorane and Silorane groups). Teeth restored with methacrylate based-composite (Filtek Z250, 3M ESPE) were hybridized with the two-step self-etching system (Clearfil SE Bond, Kuraray), with and without pre-etching (Pre-etching/Methacrylate and Methacrylate groups), or three-step adhesive system (Adper Scotchbond Multi-Purpose, 3M ESPE) (Three-step/Methacrylate group) (n = 6). The restored teeth were sectioned into stick-shaped test specimens (1.0 × 1.0 mm), and coupled to a universal test machine (0.5 mm/min) to perform microtensile testing. RESULTS Pre-etching/Methacrylate group presented the highest bond strength values, with significant difference from Silorane and Three-step/Methacrylate groups (p < 0.05). However, it was not significantly different from Preetching/Silorane and Methacrylate groups. CONCLUSIONS Pre-etching increased bond strength of silorane-based composite specific adhesive system to dentin.
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Affiliation(s)
- Laura Alves Bastos
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Ana Beatriz Silva Sousa
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Brahim Drubi-Filho
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Lucas da Fonseca Roberti Garcia
- Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
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Hashemi Kamangar SS, Ghavam M, Mahinfar N, Pourhashemi SJ. Effect of 38% carbamide peroxide on the microleakage of silorane-based versus methacrylate-based composite restorations. Restor Dent Endod 2014; 39:172-9. [PMID: 25110640 PMCID: PMC4125580 DOI: 10.5395/rde.2014.39.3.172] [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: 12/26/2013] [Accepted: 03/17/2014] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES This study aimed to assess the effect of 38% carbamide peroxide on the microleakage of class V cavities restored with either a silorane-based composite or two methacrylate-based composites. MATERIALS AND METHODS A total of 96 class V cavities were prepared on the buccal surface of extracted human teeth with both enamel and dentin margins and were randomly assigned into three groups of Filtek P90 (3M-ESPE) + P90 system adhesive (3M-ESPE)(group A), Filtek Z250 (3M-ESPE) + Adper Prompt L-Pop (3M-ESPE)(group B) and Filtek Z350XT (3M-ESPE) + Adper Prompt L-Pop (group C). Half of the teeth were randomly underwent bleaching (38% carbamide peroxide, Day White, Discus Dental, applying for 15 min, twice a day for 14 day) while the remaining half (control) were not bleached. Dye penetration was measured following immersion in basic fuchsine. Data were statistically analyzed using Kruskal-Wallis and Mann-Whitney U tests at a level of 0.05. RESULTS No significant differences were found between composites in the control groups in enamel (p = 0.171) or dentin (p = 0.094) margins. After bleaching, microleakage of Z250 (in enamel [p = 0.867] or dentin [p = 0.590] margins) and Z350 (in enamel [p = 0.445] or dentin [p = 0.591] margins) did not change significantly, but the microleakage of P90 significantly increased in both enamel (p = 0.042) and dentin (p = 0.002) margins. CONCLUSIONS No significant differences were noted between the bleached and control subgroups of two methacrylate-based composites in enamel or dentin margins. Microleakage of silorane-based composite significantly increased after bleaching.
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Affiliation(s)
- Sedighe Sadat Hashemi Kamangar
- Department of Operative Dentistry, Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran
| | - Maryam Ghavam
- Dental Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nazanin Mahinfar
- Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran
| | - Seyed Jalal Pourhashemi
- Department of Pediatric Dentistry, Tehran University of Medical Sciences, International Campus, Tehran, Iran
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Catelan A, Pollard T, Bedran-Russo AK, Santos PHD, Ambrosano GMB, Aguiar FHB. Light-curing Time and Aging Effects on the Nanomechanical Properties of Methacrylate- and Silorane-based Restorations. Oper Dent 2014; 39:389-97. [DOI: 10.2341/12-504-l] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
The aim of this study was to assess the influence of light-curing time on the nanohardness (H) and reduced elastic modulus (Er) of components (underlying dentin, hybrid layer, adhesive, and composite) of methacrylate- and silorane-based restorations after 24 hours and six months of storage. Class II slot preparations were carried out in human molars (n=3) and restored with methacrylate (Clearfil SE Bond [Kuraray] + Filtek Z250 [3M ESPE]) or silorane (LS restorative system [3M ESPE]) restorative systems and light-cured using light-emitting diode at 1390 mW/cm2 for the recommended manufacturers' time or double time. Restorations were sectioned, and bonded dentin-resin interfaces were embedded in epoxy resin and polished for evaluation with a Berkovich fluid cell tip (TI 700 Ubi-1 nanoindenter, Hysitron). Data were statistically analyzed by analysis of variance and Tukey's test (alpha=0.05). Overall, the H and Er values were higher for methacrylate-based restorations than for silorane materials (p≤0.05), an increase in curing time did not improve the H and Er of the bonded interface components of either material (p>0.05), and aging significantly decreased the mechanical properties of interface components of both resin-based restorative systems (p≤0.05). In general, nanomechanical properties decreased after six months of storage, the methacrylate restorative system exhibited higher H and Er than silorane, and light-curing time did not influence the properties tested.
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Affiliation(s)
- A Catelan
- Anderson Catelan, DDS, MS, PhD, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - T Pollard
- Timothy Pollard, MS, Department of Mechanical and Industrial Engineering, College of Engineering, University of Illinois, Chicago, IL, USA
| | - AK Bedran-Russo
- Ana Karina Bedran-Russo, DDS, MS, PhD, Department of Restorative Dentistry, College of Dentistry, University of Illinois, Chicago, IL, USA
| | - PH dos Santos
- Paulo Henrique dos Santos, DDS, MS, PhD, Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University, Araçatuba, Brazil
| | - GMB Ambrosano
- Gláucia Maria Bovi Ambrosano, DDS, MS, PhD, Department of Social Dentistry/Statistics, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - FHB Aguiar
- Flávio Henrique Baggio Aguiar, DDS, MS, PhD, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
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Reinelt S, Tabatabai M, Moszner N, Fischer UK, Utterodt A, Ritter H. Synthesis and Photopolymerization of Thiol-Modified Triazine-Based Monomers and Oligomers for the Use in Thiol-Ene-Based Dental Composites. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400174] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sebastian Reinelt
- Institut für Organische und Makromolekulare Chemie; Heinrich-Heine-Universität Düsseldorf; Universitätsstraße 1 40225 Düsseldorf Germany
| | - Monir Tabatabai
- Institut für Organische und Makromolekulare Chemie; Heinrich-Heine-Universität Düsseldorf; Universitätsstraße 1 40225 Düsseldorf Germany
| | - Norbert Moszner
- Ivoclar Vivadent AG; Bendererstrasse 2 9494 Schaan Principality of Liechtenstein
| | - Urs Karl Fischer
- Ivoclar Vivadent AG; Bendererstrasse 2 9494 Schaan Principality of Liechtenstein
| | - Andreas Utterodt
- Heraeus Kulzer GmbH; Philipp-Reis-Straße 8 61273 Wehrheim Germany
| | - Helmut Ritter
- Institut für Organische und Makromolekulare Chemie; Heinrich-Heine-Universität Düsseldorf; Universitätsstraße 1 40225 Düsseldorf Germany
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Bond strengths of silorane- and methacrylate-based composites to various underlying materials. BIOMED RESEARCH INTERNATIONAL 2014; 2014:782090. [PMID: 24895608 PMCID: PMC4033496 DOI: 10.1155/2014/782090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 04/14/2014] [Accepted: 04/19/2014] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To evaluate shear bond strength (SBS) values of a methacrylate (FZ 250) and a silorane-based (FS) resin composite to various underlying materials. MATERIALS AND METHODS A total of 80 samples were prepared with four different underlying materials; a flowable (FLC) and a bulk-fill flowable composite (BFC), and a conventional (CGIC) and resin modified glass-ionomer cement (RMGIC). These underlying materials were laminated plus to methacrylate or silorane-based resin composites (n = 10). To evaluate the specimens SBS values were evaluated with a universal testing machine (cross-head speed; 1.0 mm/min). Statistical comparisons were carried out using two-way ANOVA and Tukey's post hoc test with a significance level of P < 0.05. RESULTS SBS values for FZ250 were significantly higher than for FS for all of the underlying materials tested (P < 0.05). SBS values of FZ250 to BFC were significantly higher than to all other materials (P < 0.05), whereas SBS values of FS did not vary significantly according to underlying material (P > 0.05). CONCLUSION The use of FS in conjunction with any of the tested materials showed lower SBS than the FZ 250. Also, new low elastic modulus liner BFC presented slightly good interfacial adhesion so, the usage of BFC as an underlying material may be preferable for FZ 250.
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Yalcin M, Ahmetoglu F, Sisman R, Bozkurt BS, Hakki SS. Cytotoxicity of low-shrink composites with new monomer technology on bovine dental pulp-derived cells. Hum Exp Toxicol 2014; 34:93-9. [DOI: 10.1177/0960327113497773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Objectives: The aim of this study was to evaluate the cytotoxicity of four low-shrink composites with new monomer technology on the bovine dental pulp-derived cells (bDPCs). Materials and methods: Ten samples were prepared for each group composites, and the samples were immersed in 7 mL of culture medium for 72 h at 37°C to extract residual monomer or cytotoxic substances. The culture medium containing the material extracts was sterile filtered for use on the cell cultures. Materials were incubated in medium with serum for 72 h. bDPCs were maintained in a medium with serum. A real-time cell analyzer was used to evaluate cell survival. After seeding 200 mL of the cell suspensions into the wells (10,000 cells/well) of the E-plate 96, bDPCs were treated with bioactive components released by the composite materials (1:1 and 1:2 dilutions) and monitored every 15 min for 50 h. Results: According to analysis of variance, there were significant differences between the cell indexes of the control and GC kalore ( p < 0.05) and Bisco Reflexions ( p < 0.001) groups for the 1:1 dilutions at 25 h. When evaluated at 50 h, 1:1 dilutions of GC Kalore ( p < 0.01) and Bisco Reflexions ( p < 0.001) reduced cell survival significantly. Conclusions: Although composites resins are being advanced, their cytotoxic effects have been proceeding till this time. However, two of the four materials tested significantly reduced cell viability when compared with control. Clinical relevance: Research should focus on the cytotoxicity of composites in addition to their mechanical properties.
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Affiliation(s)
- M Yalcin
- Department of Restorative Dentistry, Faculty of Dentistry, Inonu University, Malatya, Turkey
| | - F Ahmetoglu
- Department of Endodontics, Faculty of Dentistry, Inonu University, Malatya, Turkey
| | - R Sisman
- Department of Restorative Dentistry, Faculty of Dentistry, Inonu University, Malatya, Turkey
| | - BS Bozkurt
- Research Center, Faculty of Dentistry, Selcuk University, Konya, Turkey
| | - SS Hakki
- Department of Periodontology, Faculty of Dentistry, Selcuk University, Konya, Turkey
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Isaac SZ, Bergamin ACP, Turssi CP, Amaral FLBD, Basting RT, França FMG. Evaluation of bond strength of silorane and methacrylate based restorative systems to dentin using different cavity models. J Appl Oral Sci 2014; 21:452-9. [PMID: 24212992 PMCID: PMC3881842 DOI: 10.1590/1679-775720130120] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 08/12/2013] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE The aim of this in vitro study was to evaluate the microtensile bond strength (µTBS) to dentin of two different restorative systems: silorane-based (P90), and methacrylate-based (P60), using two cavity models. MATERIAL AND METHODS Occlusal enamel of 40 human third molars was removed to expose flat dentin surface. Class I cavities with 4 mm mesial-distal width, 3 mm buccal-lingual width and 3 mm depth (C-factor=4.5) were prepared in 20 teeth, which were divided into two groups (n=10) restored with P60 and P90, bulk-filled after dentin treatment according to manufacturer's instructions. Flat buccal dentin surfaces were prepared in the 20 remaining teeth (C-factor=0.2) and restored with resin blocks measuring 4x3x3 mm using the two restorative systems (n=10). The teeth were sectioned into samples with area between 0.85 and 1.25 mm2 that were submitted to µTBS testing, using a universal testing machine (EMIC) at speed of 0.5 mm/min. Fractured specimens were analyzed under stereomicroscope and categorized according to fracture pattern. Data were analyzed using ANOVA and Tukey Kramer tests. RESULTS For flat surfaces, P60 obtained higher bond strength values compared with P90. However, for Class I cavities, P60 showed significant reduction in bond strength (p<0.05). No statistical difference between restorative systems was shown for Class I cavity model (p>0.05), or between Class I Cavity and Flat Surface group, considering P90 restorative system (p>0.05). Regarding fracture pattern, there was no statistical difference among groups (p=0.0713) and 56.3% of the fractures were adhesive. CONCLUSION It was concluded that methacrylate-based composite µTBS was influenced by cavity models, and the use of silorane-based composite led to similar bond strength values compared to the methacrylate-based composite in cavities with high C-factor.
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Affiliation(s)
- Stephano Zerlottini Isaac
- Department of Restorative Dentistry, São Leopoldo Mandic Institute and Research Center, CampinasSP, Brazil
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Munaga S, Chitumalla R, Kubigiri SK, Rawtiya M, Khan S, Sajjan P. Effect of saliva contamination on the shear bond strength of a new self-etch adhesive system to dentin. J Conserv Dent 2014; 17:31-4. [PMID: 24554857 PMCID: PMC3915382 DOI: 10.4103/0972-0707.124124] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 10/25/2013] [Accepted: 11/17/2013] [Indexed: 11/04/2022] Open
Abstract
AIMS AND OBJECTIVES To evaluate the effect of saliva contamination on the shear bond strength of a new two-step self-etch adhesive (P90 system adhesive) to dentin and to determine the effect of contaminant removing treatments on the recovery of bond strengths. MATERIALS AND METHODS The buccal surfaces of 40 human premolars were ground to expose dentin. The specimens were randomly divided into four groups. Group 1 is uncontaminated and serves as the control group. Further groups were divided based on the step in the bonding sequence when the contamination had occurred as follows: Group 2 (primer, saliva contamination, rinse and dry), group 3 (after procedure of group 2, reapplication of primer), and group 4 (after procedure like in control group, saliva contamination, rinse and dry). Filtek P90 composite resin cylinders of 3 mm diameter and 3 mm length were fabricated on the surfaces. Shear bond strength testing was done in an Instron Universal Testing Machine and the data were subjected to one-way analysis of variance (ANOVA) and Student's t-test. RESULTS With P90 system adhesive, group 2 and group 4 showed lower shear bond strength than group 1 (control) and group 3 (P < 0.05). CONCLUSION Saliva contamination significantly decreased the shear bond strength of the adhesive to dentin.
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Affiliation(s)
- Swapna Munaga
- Department of Conservative Dentistry and Endodontics, People's College of Dental Sciences, Bhopal, India
| | - Rajkiran Chitumalla
- Department of Prosthodontics, People's College of Dental Sciences, Bhopal, India
| | - Satheesh Kr Kubigiri
- Department of Preventive and Community Dentistry, Mamatha Dental College, Khammam, Andhra Pradesh, India
| | - Manjusha Rawtiya
- Department of Conservative Dentistry and Endodontics, People's College of Dental Sciences, Bhopal, India
| | - Sheeba Khan
- Department of Conservative Dentistry and Endodontics, People's College of Dental Sciences, Bhopal, India
| | - Parappa Sajjan
- Department of Preventive and Community Dentistry, PMNM Dental College and Hospital Bagalkot, Karnataka, India
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