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Panahi HKS, Dehhaghi M, Amiri H, Guillemin GJ, Gupta VK, Rajaei A, Yang Y, Peng W, Pan J, Aghbashlo M, Tabatabaei M. Current and emerging applications of saccharide-modified chitosan: a critical review. Biotechnol Adv 2023; 66:108172. [PMID: 37169103 DOI: 10.1016/j.biotechadv.2023.108172] [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: 10/30/2022] [Revised: 04/15/2023] [Accepted: 05/06/2023] [Indexed: 05/13/2023]
Abstract
Chitin, as the main component of the exoskeleton of Arthropoda, is a highly available natural polymer that can be processed into various value-added products. Its most important derivative, i.e., chitosan, comprising β-1,4-linked 2-amino-2-deoxy-β-d-glucose (deacetylated d-glucosamine) and N-acetyl-d-glucosamine units, can be prepared via alkaline deacetylation process. Chitosan has been used as a biodegradable, biocompatible, non-antigenic, and nontoxic polymer in some in-vitro applications, but the recently found potentials of chitosan for in-vivo applications based on its biological activities, especially antimicrobial, antioxidant, and anticancer activities, have upgraded the chitosan roles in biomaterials. Chitosan approval, generally recognized as a safe compound by the United States Food and Drug Administration, has attracted much attention toward its possible applications in diverse fields, especially biomedicine and agriculture. Even with some favorable characteristics, the chitosan's structure should be customized for advanced applications, especially due to its drawbacks, such as low drug-load capacity, low solubility, high viscosity, lack of elastic properties, and pH sensitivity. In this context, derivatization with relatively inexpensive and highly available mono- and di-saccharides to soluble branched chitosan has been considered a "game changer". This review critically reviews the emerging technologies based on the synthesis and application of lactose- and galactose-modified chitosan as two important chitosan derivatives. Some characteristics of chitosan derivatives and biological activities have been detailed first to understand the value of these natural polymers. Second, the saccharide modification of chitosan has been discussed briefly. Finally, the applications of lactose- and galactose-modified chitosan have been scrutinized and compared to native chitosan to provide an insight into the current state-of-the research for stimulating new ideas with the potential of filling research gaps.
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Affiliation(s)
- Hamed Kazemi Shariat Panahi
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Neuroinflammation Group, Department of Biomedical Sciences, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia
| | - Mona Dehhaghi
- Neuroinflammation Group, Department of Biomedical Sciences, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia
| | - Hamid Amiri
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan 81746-73441, Iran; Environmental Research Institute, University of Isfahan, Isfahan 81746-73441, Iran
| | - Gilles J Guillemin
- Neuroinflammation Group, Department of Biomedical Sciences, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia
| | - Vijai Kumar Gupta
- Centre for Safe and Improved Food, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK; Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK
| | - Ahmad Rajaei
- Department of Food Science and Technology, Faculty of Agriculture, Shahrood University of Technology, Shahrood, Iran
| | - Yadong Yang
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wanxi Peng
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China.
| | - Junting Pan
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Mortaza Aghbashlo
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Department of Mechanical Engineering of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
| | - Meisam Tabatabaei
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, Kuala Nerus, Terengganu 21030, Malaysia; Department of Biomaterials, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Chennai 600 077, India.
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Suvarna S, Bedrossian AE, Xu Q, Kuykendall W, Ramos V, Sorenson JA, Chung KH. Effect of Fiber Reinforcement on the Flexural Strength of the Transitional Implant-Supported Fixed Dental Prosthesis. J Prosthodont 2023; 32:139-146. [PMID: 35315177 DOI: 10.1111/jopr.13507] [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: 10/10/2021] [Accepted: 03/10/2022] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The aim of this in vitro study was to assess the efficacy of fiber reinforcement to enhance flexural strength of the transitional implant-supported fixed dental prosthesis (TISFDP). MATERIALS AND METHODS One hundred and forty denture acrylic resin plates (64 mm × 12 mm × 5 mm) with two 7 mm diameter holes were fabricated using heat-polymerized type (Lucitone 199) and CAD-CAM prepolymerized type (AvaDent) materials to simulate a chair-side reconstruction of the TISFDP. Specimens were divided into 7 groups (n = 10) according to the airborne-particle abrasion of titanium cylinder (Straumann) surface and locations of fiber reinforcement ribbons (Ribbond-ULTRA). No cylinder surface abrasion and no fiber added acrylate specimens were used as the controls. The prosthetic screws were hand-tightened on a custom fixture with analogs. Specimen hole and cylinder were joined using a 50:50 mixture of chemically polymerized resin (QYK-SET; Holmes Dental) and repair resin (Dentsply Sirona). Ten acrylate specimens with no holes were fabricated from each tested material and assigned as positive controls. A modified four-point bending test (ASTM standard-D6272) was conducted using a universal testing machine and a custom fixture with a crosshead speed 1 mm/min. The maximum failure loads were recorded. Data were statistically analyzed using 2-way ANOVA and the Tukey tests at α = 0.05. RESULTS The flexural strength values ranged from 55.4 ±8.3 to 140.9 ±15.4 MPa. The flexural strength decreased significantly when fiber was attached on the titanium cylinder surface (p < 0.05). There were no statistically significant differences in flexural strength values between specimens with and without titanium cylinder surface abrasion (p > 0.05). Statistically significant improvement in flexural strength was observed in specimens with fibers attached around the specimen holes (p < 0.05) buccally and lingually. The obtained values were not statistically significantly different from the positive controls (p > 0.05). Some fixation screw fractures were observed before catastrophic failure of specimens during testing. CONCLUSIONS Fiber reinforcement significantly improved the flexural strength of denture acrylic resins only if placed around the specimen holes on the tension side at the site of initiation of crack propagation. Even when the specimens underwent catastrophic failure, the segments remained attached to each other with the attached fibers.
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Affiliation(s)
- Shivani Suvarna
- Department of Restorative Dentistry, Graduate Prosthodontics, School of Dentistry, University of Washington, Seattle, WA
| | - Armand E Bedrossian
- Department of Restorative Dentistry, Graduate Prosthodontics, School of Dentistry, University of Washington, Seattle, WA
| | - Qianhui Xu
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY
| | - William Kuykendall
- Mechanical Engineering Department, University of Washington, Seattle, WA
| | - Van Ramos
- Department of Restorative Dentistry, Graduate Prosthodontics, School of Dentistry, University of Washington, Seattle, WA
| | - John A Sorenson
- Department of Restorative Dentistry, Graduate Prosthodontics, School of Dentistry, University of Washington, Seattle, WA
| | - Kwok-Hung Chung
- Department of Restorative Dentistry, Graduate Prosthodontics, School of Dentistry, University of Washington, Seattle, WA
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Alshabib A, Jurado CA, Tsujimoto A. Short fiber-reinforced resin-based composites (SFRCs); Current status and future perspectives. Dent Mater J 2022; 41:647-654. [PMID: 35858793 DOI: 10.4012/dmj.2022-080] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
One technique for placing of resin-based composite for large posterior cavities is the use of short fiber-reinforced resin-based composite (SFRC) to replace dentin in a biomimetic approach. As endurance under mastication cycles is a significant consideration in the clinical success of resin-based composite posterior restorations, the use of SFRC as a base material may prevent restorative fracture due to the fibers' effectiveness in stopping cracks. This review article specifies the characteristics of SFRC and describes the major underlying mechanisms of short fiber reinforcement for resin-based composite. Insights are further taken from laboratory studies used to define the short fiber-related properties of resin-based composite and the performance of currently available materials, focusing on aspects that are relevant to the reinforcement of resin-based composite. Finally, future standpoints on the development of SFRCs with nano fibers and different resin monomers, and their role in digital dentistry, are discussed.
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Affiliation(s)
- Abdulrahman Alshabib
- Department of Restorative Dentistry, King Saud University College of Dentistry.,Engr. Abdullah Bugshan Research Chair for Dental & Oral Rehabilitation, King Saud University
| | - Carlos A Jurado
- Texas Tech University Health Sciences Center El Paso Woody L. Hunt School of Dental Medicine
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, University of Iowa College of Dentistry.,Department of General Dentistry, Creighton University School of Dentistry
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Tong X, Zhu L, Wu Y, Song Y, Wang K, Huang S, Li Y, Ma J, Wen C, Lin J. A biodegradable Fe/Zn-3Cu composite with requisite properties for orthopedic applications. Acta Biomater 2022; 146:506-521. [PMID: 35523413 DOI: 10.1016/j.actbio.2022.04.048] [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: 12/20/2021] [Revised: 04/28/2022] [Accepted: 04/28/2022] [Indexed: 11/01/2022]
Abstract
Zinc (Zn)-based metals and alloys are emerging as promising biodegradable implant materials due to their inherent biodegradability and good biocompatibility. However, this class of materials exhibits low mechanical strength and a slow degradation rate, which hinders their clinical application. Here we report the development of a new biodegradable Fe/Zn-3Cu composite fabricated by infiltration casting of a Zn-3Cu alloy into an Fe foam followed by hot-rolling. Our results indicate that the hot-rolled (HR) Fe/Zn-3Cu composite exhibited an α-Zn matrix phase, a secondary CuZn5 phase, and an α-Fe phase. The HR Fe/Zn-3Cu composite exhibited an ultimate tensile strength of 269 MPa, a tensile yield strength of 210 MPa, and an elongation of 27%. The HR Fe/Zn-3Cu composite showed a degradation rate of 228 µm/year after immersion in Hanks' solution for 30 d The diluted extract of the HR Fe/Zn-3Cu composite exhibited a higher cell viability than that of the HR Zn-3Cu alloy in relation to MC3T3-E1 and MG-63 cells. Furthermore, the HR Fe/Zn-3Cu composite showed significantly better antibacterial ability than that of the HR Zn-3Cu alloy in relation to S. aureus. Overall, the HR Fe/Zn-3Cu composite can be anticipated to be a promising biodegradable implant material for bone-fixation applications. STATEMENT OF SIGNIFICANCE: This work reports a new biodegradable Fe/Zn-3Cu composite fabricated by infiltration casting and followed by hot-rolling for biodegradable bone-fixation application. Our findings demonstrated that the hot-rolled (HR) Fe/Zn-3Cu composite exhibited an ultimate tensile strength of 269.1 MPa, a tensile yield strength of 210.3 MPa, and an elongation of 26.7%. HR Fe/Zn-3Cu composite showed a degradation rate of 227.6 µm/a, higher than HR Zn-3Cu alloy after immersion in Hanks' solution for 30 d The diluted extracts of the HR Fe/Zn-3Cu composite exhibited a higher cell viability than HR Zn-3Cu alloy toward MC3T3-E1 cells. Furthermore, the HR Fe/Zn-3Cu composite showed significantly better antibacterial ability than the HR Zn-3Cu alloy toward S. aureus.
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Wierichs RJ, Weilenmann W, Jeganathan S, Perrin P. Longevity of immediate rehabilitation with direct metal-wire reinforced composite fixed partial dentures. Dent Mater 2022; 38:e257-e265. [PMID: 35718596 DOI: 10.1016/j.dental.2022.06.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/04/2022] [Accepted: 06/05/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES This study aimed to analyze the longevity of direct metal-wire reinforced composite fixed partial dentures (MRC-FPD) and factors influencing their survival and success. METHODS Within one private practice 513 MRC-FPD were directly applied. The preparation of a proximal cavity in abutment teeth was not limited. MRC-FPD were reinforced by one to three metal-wires. At the last follow-up MRC-FPD were considered successful, if they were still in function without any need of therapy. MRC-FPD were considered as survived, if they were repaired or replaced. Multi-level Cox proportional hazard models were used to evaluate the association between clinical factors and time. RESULTS Mean follow-up period (range) was 59(2-249) months. Seventy-three bridges did not survive (cumulative survival rate(CSR):86%) and further 129 bridges had received a restorative follow-up treatment (CSR:61%). AFR was 2.2% for survival and 8.6% for success. In multivariate analysis MRC-FPD with> 1 wire showed a up to 2.3x higher failure rate than MRC-FPD with one wire(p ≤ 0.023). Dentist's experience in designing MRC-FDP (p ≤ 0.017), patient's caries risk (p ≤ 0.040) and bruxism (p = 0.033) significantly influenced the failure rate: the more experience, the lower caries risk and bruxism, the lower the failure rate. SIGNIFICANCE For directly prepared metal-wire reinforced composite bridges high survival and moderate success rates were observed. MRC-FPD might, thus, be an immediate, short- and medium-term solution for replacing missing teeth. However, several factors on the levels of practice (dentist's experience in designing MRC-FDP), patient (bruxism, caries risk) and restoration (number of wires) were identified as significant predictors for the failure rate. The study was registered in the German Clinical Trials Register (DRKS-ID: DRKS00021576).
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Affiliation(s)
- R J Wierichs
- Department of Restorative, Preventive and Pediatric Dentistry, University of Bern, Bern, Switzerland.
| | | | - S Jeganathan
- Department of Restorative, Preventive and Pediatric Dentistry, University of Bern, Bern, Switzerland
| | - P Perrin
- Department of Restorative, Preventive and Pediatric Dentistry, University of Bern, Bern, Switzerland; Private clinic, Schaffhausen, Switzerland
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Revilla-León M, Fountain J, Piedra-Cascón W, Özcan M, Zandinejad A. Workflow of a fiber-reinforced composite fixed dental prosthesis by using a 4-piece additive manufactured silicone index: A dental technique. J Prosthet Dent 2021; 125:569-575. [DOI: 10.1016/j.prosdent.2020.02.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/20/2020] [Accepted: 02/20/2020] [Indexed: 10/24/2022]
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Küçük Ö, Keçeci AD. Strengthening effect of different fiber placement designs on root canal treated and bleached premolars. Odontology 2020; 109:349-357. [PMID: 32894381 DOI: 10.1007/s10266-020-00549-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 08/20/2020] [Indexed: 10/23/2022]
Abstract
To evaluate the strengthening effect of five different fibers with different placement designs in root canal treated and intracoronally bleached premolars. Seventy extracted single-rooted premolars were distributed into 7 groups (G1-G7). Group 1 (G1) included the intact (I) teeth as the negative control. Group 2 (G2) included root canal treated, intra-coronally bleached and composite (C) restored teeth as the positive control. In the other five test groups after root canal treatment the teeth were intra-coronally bleached and fiber materials were placed into standard MOD cavities in the following different designs: an intracanal rigid fiber/Reforpost (G3,RF), an intracanal flexible fiber/ Everstick (G4, FF), four intracanal flexible pin fibers/Dentapreg Pin (G5,PF), an intercuspal flexible fiber /Dentapreg SFU (G6, IF) or an intra-coronal horseshoe-shaped/ Dentapreg SFU (G7,CF). All cavities were filled with a microfilled resin composite. Fracture resistance was tested using a universal testing machine under a crosshead speed of 1 mm/minute. One-way ANOVA and Duncan's Multiple Range tests were used for statistical analysis. Fracture types were recorded. The fracture resistance values in descending order were G1(I): 1190.97 N > G6 (IF): 1138.78 N > G5 (PF): 942.45 N > G3 (RF): 737.40 N > G4 (FF):694.29 N > G2 (C): 611.83 N > G7 (CF): 542.78 N. There were statistically significant differences among the groups (p ≤ 0.05). In all groups, repairable coronal oblique fractures were mostly observed. Flexible fibers placed intercuspally exhibited a significantly better strengthening effect than those of the intracanal flexible and rigid fibers (p < 0.05).
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Affiliation(s)
- Öznur Küçük
- Kütahya Oral and Dental Health Center, Kütahya, Turkey.
| | - Ayşe Diljin Keçeci
- Department of Endodontics, School of Dentistry, Suleyman Demirel University, Isparta, Turkey.
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Perrin P, Meyer-Lueckel H, Wierichs R. Longevity of immediate rehabilitation with direct fiber reinforced composite fixed partial dentures after up to 9 years. J Dent 2020; 100:103438. [DOI: 10.1016/j.jdent.2020.103438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/23/2020] [Accepted: 07/27/2020] [Indexed: 02/06/2023] Open
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Gonzalez AM, Piedra-Cascón W, Zandinejad A, Revilla-León M. Fiber-reinforced composite fixed dental prosthesis using an additive manufactured silicone index. J ESTHET RESTOR DENT 2020; 32:626-633. [PMID: 32770698 DOI: 10.1111/jerd.12628] [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: 04/25/2020] [Revised: 06/05/2020] [Accepted: 07/07/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Digital tools such as facial and intraoral digitizers and additive manufacturing (AM) technologies assist restorative treatments. The objective of the present manuscript was to describe a workflow procedure for treatment planning and fabricating a fiber-reinforced composite fixed dental prosthesis (FDP) replacing an absent maxillary lateral incisor, using additively manufactured silicone indices to facilitate the clinical intervention. CLINICAL CONSIDERATIONS The elaboration of a direct fiber-reinforced composite restoration is a technique sensitive procedure which might be time-consuming for the clinician. The digital waxing helped to determine the exact position and size of the lingual wings and connectors of the fiber-reinforced FDP and to design a three-piece index. And the AM of the index helped to transfer the information to the patient's dentition accurately. CONCLUSIONS The protocol minimizes the time of clinical intervention by facilitating the transference of the virtual diagnostic waxing teeth into the patient's mouth. The three-piece silicone index provides an individualized path of insertion of each index part while also providing a customized space and location of the lingual wings of the restoration. CLINICAL SIGNIFICANCE The usage of AM silicone indices facilitates the clinical intervention by translating the size and position of the diagnostic wax-up teeth into the patient's mouth, minimizing clinical procedure's time.
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Affiliation(s)
- Ana M Gonzalez
- Comprehensive Dentistry Department, College of Dentistry, Texas A&M University, Dallas, Texas, USA
| | - Wenceslao Piedra-Cascón
- Restorative Dentistry Department, School of Denstistry, Complutense University of Madrid, Madrid, Spain.,Revilla Research Center, Madrid, Spain
| | - Amirali Zandinejad
- Comprehensive Dentistry Department, College of Dentistry, Texas A&M University, Dallas, Texas, USA
| | - Marta Revilla-León
- Comprehensive Dentistry Department, College of Dentistry, Texas A&M University, Dallas, Texas, USA.,Revilla Research Center, Madrid, Spain.,Restorative Dentistry Department, School of Dentistry, University of Washington, Seattle, Washington, USA
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Suzaki N, Yamaguchi S, Hirose N, Tanaka R, Takahashi Y, Imazato S, Hayashi M. Evaluation of physical properties of fiber-reinforced composite resin. Dent Mater 2020; 36:987-996. [DOI: 10.1016/j.dental.2020.04.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/28/2020] [Accepted: 04/28/2020] [Indexed: 11/26/2022]
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Electrical Properties of Horizontal Array Capacitor Using Composite Organic Dielectric Layer of Impregnated Glass-Fiber Epoxy. ADVANCES IN POLYMER TECHNOLOGY 2020. [DOI: 10.1155/2020/5601714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We introduce a horizontal array capacitor with nine capacitances in a single body using an organic dielectric layer impregnated with glass fiber as a prepreg sheet. An organic solid horizontal array capacitor with a dielectric of prepreg materials of the epoxy type can implement the nine capacitances in a single body via a unique simple lamination and cutting process. We then investigate the basic electrical properties of a horizontal array capacitor. The organic solid array capacitors with five electrodes and four dielectrics are Cu/PPG layer/Cu/PPG layer/Cu/PPG layer/Cu/PPG layer/Cu with a horizontal array structure. The size of a completed array capacitor is 2.85 × 2.85 mm. The height of the fabricated array capacitor in the vertical direction is 0.5 mm, with nine capacitances possessing a series-type structure. The average capacitance value of C1, C2, C3, and C4 is 1.98 nF, and each tolerance has a value within 1% based on the average value. The temperature change rate in the capacitance maintains a nearly linear characteristic, but the rate of change tends to increase finely from 120°C or more. The capacitance values of C5, C6, and C7 with the parallel circuit were measured according to the voltage. Impedance and ESR (equivalent series resistor) of C1 were measured according to frequency and temperature.
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Türkaslan S, Mutluay MM, Vallittu PK, Arola D, Tezvergil-Mutluay A. Fatigue resistance of metal-free cantilever bridges supported by labial laminate veneers. J Mech Behav Biomed Mater 2020; 103:103596. [PMID: 32090925 DOI: 10.1016/j.jmbbm.2019.103596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 11/18/2019] [Accepted: 12/10/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Süha Türkaslan
- Suleyman Demirel University, Faculty of Dentistry, Department of Prosthodontics, Isparta, Turkey
| | - Mustafa Murat Mutluay
- Adhesive Dentistry Research Group, Department of Restorative Dentistry and Cardiology, Institute of Dentistry, University of Turku, Turku, Finland; Institute of Dentistry, University of Eastern Finland, Kuopio, Finland; Kuopio University Hospital, Kuopio, Finland.
| | - Pekka K Vallittu
- Department of Biomaterials Science, Turku University, and City of Turku, Welfare Division, Turku, Finland
| | - Dwayne Arola
- Materials Science and Engineering, University of Washington, Seattle, WA, USA; Department of Restorative Dentistry and Department of Oral Health Sciences, Dental School, University of Washington Seattle, WA, USA
| | - Arzu Tezvergil-Mutluay
- Adhesive Dentistry Research Group, Department of Restorative Dentistry and Cardiology, Institute of Dentistry, University of Turku, Turku, Finland; Turku University Hospital, TYKS, Turku, Finland
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Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties. MATERIALS 2020; 13:ma13051028. [PMID: 32106404 PMCID: PMC7084318 DOI: 10.3390/ma13051028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/14/2020] [Accepted: 02/21/2020] [Indexed: 12/04/2022]
Abstract
Fiber reinforced composites (FRCs) are metal free materials that have many applications in dentistry. In clinical orthodontics, they are used as retainers after active treatment in order to avoid relapse. However, although the modulus of the elasticity of FRCs is low, the rigidity of the material in the form of a relatively thick retainer with a surface cover of a flowable resin composite is known to have higher structural rigidity than stainless steel splints. The aim of the present study is to measure load and bending stress of stainless steel wires, as well as flowable resin composite covered and spot-bonded FRC retainer materials after tooth brushing. These materials were tested with a three point bending test for three different conditions: no brushing, 26 min of brushing, and 60 min of brushing. SEM images were taken before and after different times of tooth brushing. Results showed that stainless steel was not significantly affected by tooth brushing. On the other hand, a significant reduction of values at maximum load at fracture was reported for both FRC groups, and uncovered FRCs were most affected. Concerning maximum bending stress, no significant reduction by pretreatment conditions was reported for the materials tested. SEM images showed no evident wear for stainless steel. Flowable resin composite covered FRCs showed some signs of composite wear, whereas spot-bonded FRCs, i.e., without the surface cover of a flowable resin composite, showed signs of wear on the FRC and exposed glass fibers from the FRC’s polymer matrix. Because of the significant changes of the reduction of maximum load values and the wear for spot-bonded FRCs, this technique needs further in vitro and in vivo tests before it can be performed routinely in clinical practice.
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Toivonen J, Björkqvist M, Minn H, Vallittu PK, Rekola J. Scattering of therapeutic radiation in the presence of craniofacial bone reconstruction materials. J Appl Clin Med Phys 2019; 20:119-126. [PMID: 31782897 PMCID: PMC6909125 DOI: 10.1002/acm2.12776] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 08/05/2019] [Accepted: 10/03/2019] [Indexed: 12/17/2022] Open
Abstract
Purpose Radiation scattering from bone reconstruction materials can cause problems from prolonged healing to osteoradionecrosis. Glass fiber reinforced composite (FRC) has been introduced for bone reconstruction in craniofacial surgery but the effects during radiotherapy have not been previously studied. The purpose of this study was to compare the attenuation and back scatter caused by different reconstruction materials during radiotherapy, especially FRC with bioactive glass (BG) and titanium. Methods The effect of five different bone reconstruction materials on the surrounding tissue during radiotherapy was measured. The materials tested were titanium, glass FRC with and without BG, polyether ether ketone (PEEK) and bone. The samples were irradiated with 6 MV and 10 MV photon beams. Measurements of backscattering and dose changes behind the sample were made with radiochromic film and diamond detector dosimetry. Results An 18% dose enhancement was measured with a radiochromic film on the entrance side of irradiation for titanium with 6 MV energy while PEEK and FRC caused an enhancement of 10% and 4%, respectively. FRC‐BG did not cause any measurable enhancement. The change in dose immediately behind the sample was also greatest with titanium (15% reduction) compared with the other materials (0–1% enhancement). The trend is similar with diamond detector measurements, titanium caused a dose enhancement of up to 4% with a 1 mm sample and a reduction of 8.5% with 6 MV energy whereas FRC, FRC‐BG, PEEK or bone only caused a maximum dose reduction of 2.2%. Conclusions Glass fiber reinforced composite causes less interaction with radiation than titanium during radiotherapy and could provide a better healing environment after bone reconstruction.
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Affiliation(s)
- Joonas Toivonen
- Department of Otorhinolaryngology - Head and Neck Surgery, Turku University Hospital, Turku, Finland.,Department of Biomaterials Science, Institute of Dentistry and Turku Clinical Biomaterials Centre - TCBC, University of Turku, Turku, Finland
| | - Mikko Björkqvist
- Department of Medical Physics, Division of Medical Imaging, Turku University Hospital, Turku, Finland.,Department of Oncology and Radiotherapy, Turku University Hospital and University of Turku, Turku, Finland
| | - Heikki Minn
- Department of Oncology and Radiotherapy, Turku University Hospital and University of Turku, Turku, Finland
| | - Pekka K Vallittu
- Department of Biomaterials Science, Institute of Dentistry and Turku Clinical Biomaterials Centre - TCBC, University of Turku, Turku, Finland.,City of Turku, Welfare Division, Turku, Finland
| | - Jami Rekola
- Department of Otorhinolaryngology - Head and Neck Surgery, Turku University Hospital, Turku, Finland.,Department of Biomaterials Science, Institute of Dentistry and Turku Clinical Biomaterials Centre - TCBC, University of Turku, Turku, Finland
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Chitlac-coated Thermosets Enhance Osteogenesis and Angiogenesis in a Co-culture of Dental Pulp Stem Cells and Endothelial Cells. NANOMATERIALS 2019; 9:nano9070928. [PMID: 31252684 PMCID: PMC6669739 DOI: 10.3390/nano9070928] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/25/2019] [Accepted: 06/26/2019] [Indexed: 12/14/2022]
Abstract
Dental pulp stem cells (DPSCs) represent a population of stem cells which could be useful in oral and maxillofacial reconstruction. They are part of the periendothelial niche, where their crosstalk with endothelial cells is crucial in the cellular response to biomaterials used for dental restorations. DPSCs and the endothelial cell line EA.hy926 were co-cultured in the presence of Chitlac-coated thermosets in culture conditions inducing, in turn, osteogenic or angiogenic differentiation. Cell proliferation was evaluated by 3-[4,5-dimethyl-thiazol-2-yl-]-2,5-diphenyl tetrazolium bromide (MTT) assay. DPSC differentiation was assessed by measuring Alkaline Phosphtase (ALP) activity and Alizarin Red S staining, while the formation of new vessels was monitored by optical microscopy. The IL-6 and PGE2 production was evaluated as well. When cultured together, the proliferation is increased, as is the DPSC osteogenic differentiation and EA.hy926 vessel formation. The presence of thermosets appears either not to disturb the system balance or even to improve the osteogenic and angiogenic differentiation. Chitlac-coated thermosets confirm their biocompatibility in the present co-culture model, being capable of improving the differentiation of both cell types. Furthermore, the assessed co-culture appears to be a useful tool to investigate cell response toward newly synthesized or commercially available biomaterials, as well as to evaluate their engraftment potential in restorative dentistry.
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Kuusisto N, Huumonen S, Kotiaho A, Haapea M, Rekola J, Vallittu P. Intensity of artefacts in cone beam CT examinations caused by titanium and glass fibre-reinforced composite implants. Dentomaxillofac Radiol 2019; 48:20170471. [PMID: 30084258 PMCID: PMC6476382 DOI: 10.1259/dmfr.20170471] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 07/16/2018] [Accepted: 08/01/2018] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVES: The aim was to compare titanium and glass fibre-reinforced composite (FRC) orbital floor implants using cone beam CT (CBCT). FRC implants are nonmetallic and these implants have not been analysed in CBCT images before. The purpose of this study is to compare the artefact formation of the titanium and the FRC orbital floor implants in CBCT images. METHODS: One commercially pure titanium and one S-glass FRC with bioactive glass particles implant were imaged with CBCT using the same imaging values (80 kV, 1 mA, FOV 60 × 60 mm). CBCT images were analysed in axial slices from three areas to determine the magnitude of the artefacts in the vicinity of the implants. Quantified results based on the gray values of images were analysed using analysis-of-variance. RESULTS: Compared to the reference the gray values of the titanium implant are more negative in every region of interest in all slices (p < 0.05) whereas the gray values of the FRC implant differ statistically significantly in less than half of the examined areas. CONCLUSIONS: The titanium implant caused artefacts in all of the analysed CBCT slices. Compared to the reference the gray values of the FRC implant changed only slightly and this feature enables to use wider imaging options postoperatively.
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Affiliation(s)
| | | | | | | | - Jami Rekola
- Department of Otorhinolaryngology, Turku University Hospital, Turku, Finland
| | - Pekka Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre – TCBC, Institute of Dentistry and BioCity, University of Turku and City of Turku, Welfare Division, Turku, Finland
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Influence of primers on the properties of the adhesive interface between resin composite luting cement and fiber-reinforced composite. J Mech Behav Biomed Mater 2018; 88:281-287. [DOI: 10.1016/j.jmbbm.2018.08.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 07/29/2018] [Accepted: 08/30/2018] [Indexed: 11/23/2022]
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18
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Scribante A, Vallittu PK, Özcan M, Lassila LVJ, Gandini P, Sfondrini MF. Travel beyond Clinical Uses of Fiber Reinforced Composites (FRCs) in Dentistry: A Review of Past Employments, Present Applications, and Future Perspectives. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1498901. [PMID: 30426003 PMCID: PMC6217899 DOI: 10.1155/2018/1498901] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 10/02/2018] [Indexed: 12/17/2022]
Abstract
The reinforcement of resins with short or long fibers has multiple applications in various engineering and biomedical fields. The use of fiber reinforced composites (FRCs) in dentistry has been described in the literature from more than 40 years. In vitro studies evaluated mechanical properties such as flexural strength, fatigue resistance, fracture strength, layer thickness, bacterial adhesion, bonding characteristics with long fibers, woven fibers, and FRC posts. Also, multiple clinical applications such as replacement of missing teeth by resin-bonded adhesive fixed dental prostheses of various kinds, reinforcement elements of dentures or pontics, and direct construction of posts and cores have been investigated. In orthodontics, FRCs have been used also for active and passive orthodontic applications, such as anchorage units, en-masse movement units, and postorthodontic tooth retention. FRCs have been extensively tested in the literature, but today the advances in new technologies involving the introduction of nanofillers or new fibers along with understanding the design principles of FRC devices open new fields of research for these materials both in vitro and in vivo. The present review describes past and present applications of FRCs and introduces some future perspectives on the use of these materials.
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Affiliation(s)
- Andrea Scribante
- Unit of Orthodontics and Paediatric Dentistry, Section of Dentistry, Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Italy
| | - Pekka K. Vallittu
- Department of Biomaterial Science and Turku Clinical Biomaterials Centre (TCBC), Institute of Dentistry, University of Turku, Turku, Finland
- City of Turku, Welfare Division, Turku, Finland
| | - Mutlu Özcan
- University of Zurich, Center for Dental and Oral Medicine, Dental Materials Unit, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zurich, Switzerland
| | - Lippo V. J. Lassila
- Department of Biomaterial Science and Turku Clinical Biomaterials Centre (TCBC), Institute of Dentistry, University of Turku, Turku, Finland
| | - Paola Gandini
- Unit of Orthodontics and Paediatric Dentistry, Section of Dentistry, Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Italy
| | - Maria Francesca Sfondrini
- Unit of Orthodontics and Paediatric Dentistry, Section of Dentistry, Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, Italy
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Perea-Lowery L, Vallittu PK. Framework design and pontics of fiber-reinforced composite fixed dental prostheses — An overview. J Prosthodont Res 2018; 62:281-286. [DOI: 10.1016/j.jpor.2018.03.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/03/2018] [Accepted: 03/09/2018] [Indexed: 10/28/2022]
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20
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Tacir IH, Dirihan RS, Polat ZS, Salman GÖ, Vallittu P, Lassila L, Ayna E. Comparison of Load-Bearing Capacities of 3-Unit Fiber-Reinforced Composite Adhesive Bridges with Different Framework Designs. Med Sci Monit 2018; 24:4440-4448. [PMID: 29950555 PMCID: PMC6054775 DOI: 10.12659/msm.909271] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background The aim of this study was to investigate and compare the load-bearing capacities of three-unit direct resin-bonded fiber-reinforced composite fixed dental prosthesis with different framework designs. Material/Methods Sixty mandibular premolar and molar teeth without caries were collected and direct glass fiber-resin fixed FDPs were divided into 6 groups (n=10). Each group was restored via direct technique with different designs. In Group 1, the inlay-retained bridges formed 2 unidirectional FRC frameworks and pontic-reinforced transversal FRC. In Group 2, the inlay-retained bridges were supported by unidirectional lingual and occlusal FRC frameworks. Group 3, had buccal and lingual unidirectional FRC frameworks without the inlay cavities. Group 4 had reinforced inlay cavities and buccal-lingual FRC with unidirectional FRC frameworks. Group 5, had a circular form of fiber reinforcement around cusps in addition to buccal-lingual FRC frameworks. Group 6 had a circular form of fiber reinforcement around cusps with 2 bidirectional FRC frameworks into inlay cavities. All groups were loaded until final fracture using a universal testing machine at a crosshead speed of 1 mm/min. Results Mean values of the groups were determined with ANOVA and Tukey HSD. When all data were evaluated, Group 6 had the highest load-bearing capacities and revealed significant differences from Group 3 and Group 4. Group 6 had the highest strain (p>0.05). When the fracture patterns were investigated, Group 6 had the durability to sustain fracture propagation within the restoration. Conclusions The efficiency of fiber reinforcement of the restorations alters not only the amount of fiber, but also the design of the restoration with fibers.
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Affiliation(s)
- Ibrahim H Tacir
- Department of Prosthetic Dentistry, Faculty of Dentistry, Dicle University, Diyarbakir, Turkey
| | - Roda S Dirihan
- Department of Biomaterials Science, Institute of Dentistry, Faculty of Medicine, University of Turku, Turku, Finland
| | - Zelal Seyfioglu Polat
- Department of Prosthetic Dentistry, Faculty of Dentistry, Dicle University, Diyarbakir, Turkey
| | - Gizem Ön Salman
- DClinDent Bursa Oral and Dental Health Hospital, Bursa, Turkey
| | - Pekka Vallittu
- Department of Biomaterials Science, Institute of Dentistry, Faculty of Medicine, University of Turku, Turku, Finland
| | - Lippo Lassila
- Department of Biomaterials Science, Institute of Dentistry, Faculty of Medicine, University of Turku, Turku, Finland
| | - Emrah Ayna
- Department of Prosthetic Dentistry, Faculty of Dentistry, Dicle University, Diyarbakir, Turkey
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Vallittu PK. An overview of development and status of fiber-reinforced composites as dental and medical biomaterials. ACTA BIOMATERIALIA ODONTOLOGICA SCANDINAVICA 2018; 4:44-55. [PMID: 29707613 PMCID: PMC5917305 DOI: 10.1080/23337931.2018.1457445] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 03/20/2018] [Indexed: 01/11/2023]
Abstract
Fibr-reinforced composites (FRC) have been used successfully for decades in many fields of science and engineering applications. Benefits of FRCs relate to physical properties of FRCs and versatile production methods, which can be utilized. Conventional hand lamination of prefabricated FRC prepregs is utilized still most commonly in fabrication of dental FRC devices but CAD-CAM systems are to be come for use in certain production steps of dental constructions and medical FRC implants. Although metals, ceramics and particulate filler resin composites have successfully been used as dental and medical biomaterials for decades, devices made out of these materials do not meet all clinical requirements. Only little attention has been paid to FRCs as dental materials and majority of the research in dental field has been focusing on particulate filler resin composites and in medical biomaterial research to biodegradable polymers. This is paradoxical because FRCs can potentially resolve many of the problems related to traditional isotropic dental and medical materials. This overview reviews the rationale and status of using biostable glass FRC in applications from restorative and prosthetic dentistry to cranial surgery. The overview highlights also the critical material based factors and clinical requirement for the succesfull use of FRCs in dental reconstructions.
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Affiliation(s)
- Pekka K. Vallittu
- Department of Biomaterials Science, Turku Clinical Biomaterials Centre – TCBC, Institute of Dentistry, University of Turku, Welfare Division, Turku, Finland
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Khan AA, Al-Kheraif AA, Al-Shehri AM, Säilynoja E, Vallittu PK. Polymer matrix of fiber-reinforced composites: Changes in the semi-interpenetrating polymer network during the shelf life. J Mech Behav Biomed Mater 2018; 78:414-419. [DOI: 10.1016/j.jmbbm.2017.11.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 11/04/2017] [Accepted: 11/22/2017] [Indexed: 10/18/2022]
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Romero MF, Haddock FJ, Brackett WW. Replacement of a Missing Maxillary Central Incisor Using a Direct Fiber-Reinforced Fixed Dental Prosthesis: A Case Report. Oper Dent 2017; 43:E32-E36. [PMID: 29284099 DOI: 10.2341/16-279-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The use of the direct fiber-reinforced fixed dental prosthesis (FDP) restorative technique presented in this article will result in an ideal restoration considering both esthetics and function in a single appointment. Although indirect techniques are available and may be used, they are time-consuming, resulting in higher cost; therefore, a simplified approach combining a prebonded fiber-reinforced mesh with a sculptable micro-hybrid composite will deliver an acceptable esthetic result with proper function.
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Passaretti A, Petroni G, Miracolo G, Savoia V, Perpetuini A, Cicconetti A. Metal free, full arch, fixed prosthesis for edentulous mandible rehabilitation on four implants. J Prosthodont Res 2017; 62:264-267. [PMID: 29223315 DOI: 10.1016/j.jpor.2017.10.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 09/04/2017] [Accepted: 10/20/2017] [Indexed: 10/18/2022]
Abstract
PURPOSE The goal of this work is to describe an implant-prosthetic protocol for rehabilitation of edentulous mandible, by using a fixed prosthesis made of fiber-reinforced composite material (FRC). The protocol contemplates a minimal invasive surgery and ensures predictable and safe results, with good aesthetic and performance combined to cost savings. METHODS FRC material is used to build the substructure of a prosthetic framework supported by four short implants (5mm long and 4mm wide). The prosthesis substructure is made of Trinia immersed in a matrix of epoxy resin (FRC). It is supplied in milling blocks (pre-cured) for the CAD/CAM (computer-aided design/computer-aided manufacturing) technique. Implants are placed in lower edentulous jaw in position of first molar and canine, each side. Four month after, a resin bar is build based on a stone model, denture teeth are placed and the occlusion is checked. The resin bar and the stone model with milled abutments are scanned and a FRC bar is achieved with the CAD/CAM technique. The teeth are mounted to the substructure trough denture resin. Temporary cementation of framework is achieved on the abutments connected to the implants. CONCLUSION A protocol for a fixed mandibular implant-prosthetic rehabilitation is described. The protocol contemplates a minimal invasive surgery and ensures predictable and safe results, with good aesthetic and performance combined to cost savings. In addition, this technique allows performing basic surgery also in presence of atrophy.
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Affiliation(s)
- Alfredo Passaretti
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Italy
| | - Giulia Petroni
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Italy
| | | | | | | | - Andrea Cicconetti
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Italy.
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Load-bearing capacity and fracture behavior of glass fiber-reinforced composite cranioplasty implants. J Appl Biomater Funct Mater 2017; 15:e356-e361. [PMID: 28862733 DOI: 10.5301/jabfm.5000375] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2017] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Glass fiber-reinforced composites (FRCs) have been adapted for routine clinical use in various dental restorations and are presently also used in cranial implants. The aim of this study was to measure the load-bearing capacity and failure type of glass FRC implants during static loading with and without interconnective bars and with different fixation modes. METHODS Load-bearing capacities of 2 types of FRC implants with 4 different fixation modes were experimentally tested. The sandwich-like FRC implants were made of 2 sheets of woven FRC fabric, which consisted of silanized, woven E-glass fiber fabrics impregnated in BisGMA-TEGDMA monomer resin matrix. The space between the outer and inner surfaces was filled with glass particles. All FRC implants were tested up to a 10-mm deflection with load-bearing capacity determined at 6-mm deflection. The experimental groups were compared using nonparametric Kruskal-Wallis analysis with Steel-Dwass post hoc test. RESULTS FRC implants underwent elastic and plastic deformation until 6-mm deflection. The loading test did not demonstrate any protrusions of glass fibers or cut fiber even at 10-mm deflection. An elastic and plastic deformation of the implant occurred until the FRC sheets were separated from each other. In the cases of the free-standing setup (no fixation) and the fixation with 6 screws, the FRC implants with 2 interconnective bars showed a significantly higher load-bearing capacity compared with the implant without interconnective bars. CONCLUSIONS FRC implants used in this study showed a load-bearing capacity which may provide protection for the brain after cranial bone defect reconstruction.
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Spot-Bonding and Full-Bonding Techniques for Fiber Reinforced Composite (FRC) and Metallic Retainers. Int J Mol Sci 2017; 18:ijms18102096. [PMID: 28976936 PMCID: PMC5666778 DOI: 10.3390/ijms18102096] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/01/2017] [Accepted: 10/02/2017] [Indexed: 11/20/2022] Open
Abstract
Fiber reinforced Composite (FRC) retainers have been introduced as an aesthetic alternative to conventional metallic splints, but present high rigidity. The purpose of the present investigation was to evaluate bending and fracture loads of FRC splints bonded with conventional full-coverage of the FRC with a composite compared with an experimental bonding technique with a partial (spot-) resin composite cover. Stainless steel rectangular flat, stainless steel round, and FRC retainers were tested at 0.2 and 0.3 mm deflections and at a maximum load. Both at 0.2 and 0.3 mm deflections, the lowest load required to bend the retainer was recorded for spot-bonded stainless steel flat and round wires and for spot-bonded FRCs, and no significant differences were identified among them. Higher force levels were reported for full-bonded metallic flat and round splints and the highest loads were recorded for full-bonded FRCs. At the maximum load, no significant differences were reported among spot- and full-bonded metallic splints and spot-bonded FRCs. The highest loads were reported for full bonded FRCs. The significant decrease in the rigidity of spot-bonded FRC splints if compared with full-bonded retainers suggests further tests in order to propose this technique for clinical use, as they allow physiologic tooth movement, thus presumably reducing the risk of ankylosis.
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Vulićević Z, Beloica M, Kosanović D, Radović I, Juloski J, Ivanović D. Prosthetics in Paediatric Dentistry. BALKAN JOURNAL OF DENTAL MEDICINE 2017. [DOI: 10.1515/bjdm-2017-0012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Summary
Premature loss of teeth in children may lead to both functional and esthetic problems. Missing teeth in both anterior and posterior regions may cause malfunctions in mastication and proper pronunciation. If the missing teeth are not replaced, further complications may occur, including adjacent tooth migration, loss of alveolar bone, and irregular occlusion. Considering the sensitive nature of children, loss of teeth may cause the development of insecurities and low self esteem problems. Due to dynamic nature of growth in children and adolescents, prosthetic appliances must not hinder development of orofacial system, and must meet adequate esthetic and functional standards. Dental prosthetic appliances in paediatrics must be planned with respect to the special conditions that led to tooth loss or damage. Multi-disciplinary approach is needed, under constant supervision of paediatric dentist and orthodontist, as well as regular checkups with clinical and radiographical examinations.
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Affiliation(s)
- Zoran Vulićević
- Clinic for Pediatric and Preventive Dentistry, Faculty of Dental Medicine, University of Belgrade, Belgrade , Serbia
| | - Miloš Beloica
- Clinic for Pediatric and Preventive Dentistry, Faculty of Dental Medicine, University of Belgrade, Belgrade , Serbia
| | - Dušan Kosanović
- Clinic for Pediatric and Preventive Dentistry, Faculty of Dental Medicine, University of Belgrade, Belgrade , Serbia
| | - Ivana Radović
- Clinic for Pediatric and Preventive Dentistry, Faculty of Dental Medicine, University of Belgrade, Belgrade , Serbia
| | - Jelena Juloski
- Clinic for Pediatric and Preventive Dentistry, Faculty of Dental Medicine, University of Belgrade, Belgrade , Serbia
| | - Dragan Ivanović
- Faculty of Medicine, University of East Sarajevo Republic of Srpska, Sarajevo , Bosnia and Herzegovina
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Vallittu PK, Shinya A, Baraba A, Kerr I, Keulemans F, Kreulen C, Lassila L, Malmstrom H, Novotny R, Peumans M, Van Rensburg J, Wolff D, Özcan M. Fiber-reinforced composites in fixed prosthodontics-Quo vadis? Dent Mater 2017; 33:877-879. [PMID: 28552334 DOI: 10.1016/j.dental.2017.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 05/03/2017] [Indexed: 11/16/2022]
Affiliation(s)
- Pekka K Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Turku, Finland; City of Turku, Welfare Division, Finland.
| | - Akikazu Shinya
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Turku, Finland; Department of Crown and Bridge, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan
| | - Anja Baraba
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Croatia
| | - Ian Kerr
- Dental Practitioner, Hawkhurst, UK
| | - Filip Keulemans
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Cees Kreulen
- Department of Preventive and Restorative Dentistry, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lippo Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Hans Malmstrom
- Department of General Dentistry, University of Rochester, Eastman Institute for Oral Health, Rochester, NY, USA
| | | | - Marleen Peumans
- KU Leuven-BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Leuven, Belgium
| | | | - Diana Wolff
- University of Heidelberg, Department of Conservative Dentistry, Heidelberg, Germany
| | - 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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A systematic review of the survival and complication rates of inlay-retained fixed dental prostheses. J Dent 2017; 59:2-10. [DOI: 10.1016/j.jdent.2017.02.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/20/2017] [Accepted: 02/13/2017] [Indexed: 01/11/2023] Open
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Affiliation(s)
- Sufyan Garoushi
- Department of prosthetic dentistry and biometerials science, Institute of dentistry, University of Turku, Turku, Finland
| | - Pekka Vallittu
- Department of prosthetic dentistry and biometerials science, Institute of dentistry, University of Turku, Turku, Finland
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Esteban-Tejeda L, Cabal B, Torrecillas R, Prado C, Fernandez-Garcia E, López-Piriz R, Quintero F, Pou J, Penide J, Moya JS. Antimicrobial activity of submicron glass fibres incorporated as a filler to a dental sealer. ACTA ACUST UNITED AC 2016; 11:045014. [PMID: 27509353 DOI: 10.1088/1748-6041/11/4/045014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two types of antimicrobial glass fibers containing ZnO and CaO, with diameters ranging from tens of nanometers to 1 µm, were successfully fabricated by a laser spinning technique. The antimicrobial performance was corroborated according to ISO 20743:2013, by using gram-negative (Escherichia coli) and gram-positive (Streptococcus oralis, Streptococcus mutans and Staphylococcus aureus) bacteria, and yeast (Candida krusei) (more than 3 logs of reduction). The metabolic activity and endosomal system of eukaryotic cells were not altered by using eluents of CaO glass submicrometric fibers and ZnO fibers at 1 : 10 dilution as cellular media (viability rates over 70%). A dental material was functionalized by embedding ZnO nanofibers above the percolation threshold (20% wt), creating a three-dimensional (3D) fiber network that added an antimicrobial profile. This new ZnO glass fiber composite is proved non-cytotoxic and preserved the antimicrobial effect after immersion in human saliva. This is the first time that a fiber-reinforced liner with strong antimicrobial-activity has been created to prevent secondary caries. The potential of developing new fiber-reinforced composites (FRCs) with antimicrobial properties opens up an extensive field of dental applications where most important diseases have an infectious origin.
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Affiliation(s)
- L Esteban-Tejeda
- School of Chemistry-CRANN, Trinity College Dublin, Green College, Dublin 2, Ireland. Department of Biomaterials and Bioinspired Materials, Materials Science Institute of Madrid, (ICMM), Spanish National Research Council (CSIC), Cantoblanco, Madrid 28049, Spain
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Kulkova J, Moritz N, Huhtinen H, Mattila R, Donati I, Marsich E, Paoletti S, Vallittu PK. Bioactive glass surface for fiber reinforced composite implants via surface etching by Excimer laser. Med Eng Phys 2016; 38:664-670. [PMID: 27134152 DOI: 10.1016/j.medengphy.2016.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 02/22/2016] [Accepted: 04/03/2016] [Indexed: 11/26/2022]
Abstract
Biostable fiber-reinforced composites (FRC) prepared from bisphenol-A-glycidyldimethacrylate (BisGMA)-based thermosets reinforced with E-glass fibers are promising alternatives to metallic implants due to the excellent fatigue resistance and the mechanical properties matching those of bone. Bioactive glass (BG) granules can be incorporated within the polymer matrix to improve the osteointegration of the FRC implants. However, the creation of a viable surface layer using BG granules is technically challenging. In this study, we investigated the potential of Excimer laser ablation to achieve the selective removal of the matrix to expose the surface of BG granules. A UV-vis spectroscopic study was carried out to investigate the differences in the penetration of light in the thermoset matrix and BG. Thereafter, optimal Excimer laser ablation parameters were established. The formation of a calcium phosphate (CaP) layer on the surface of the laser-ablated specimens was verified in simulated body fluid (SBF). In addition, the proliferation of MG63 cells on the surfaces of the laser-ablated specimens was investigated. For the laser-ablated specimens, the pattern of proliferation of MG63 cells was comparable to that in the positive control group (Ti6Al4V). We concluded that Excimer laser ablation has potential for the creation of a bioactive surface on FRC-implants.
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Affiliation(s)
- Julia Kulkova
- Turku Clinical Biomaterials Centre (TCBC), Department of Biomaterials Science, Institute of Dentistry, University of Turku and Biocity Turku Biomaterials Research Program and City of Turku Welfare Division, Itäinen pitkäkatu 4B (PharmaCity), FI-20520 Turku, Finland
| | - Niko Moritz
- Turku Clinical Biomaterials Centre (TCBC), Department of Biomaterials Science, Institute of Dentistry, University of Turku and Biocity Turku Biomaterials Research Program and City of Turku Welfare Division, Itäinen pitkäkatu 4B (PharmaCity), FI-20520 Turku, Finland.
| | - Hannu Huhtinen
- Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014, Finland
| | - Riina Mattila
- Turku Clinical Biomaterials Centre (TCBC), Department of Biomaterials Science, Institute of Dentistry, University of Turku and Biocity Turku Biomaterials Research Program and City of Turku Welfare Division, Itäinen pitkäkatu 4B (PharmaCity), FI-20520 Turku, Finland
| | - Ivan Donati
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 5, I-34127 Trieste, Italy
| | - Eleonora Marsich
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Piazza dell'Ospitale 1, 34129 Trieste, Italy
| | - Sergio Paoletti
- Department of Life Sciences, University of Trieste, Via Licio Giorgieri 5, I-34127 Trieste, Italy
| | - Pekka K Vallittu
- Turku Clinical Biomaterials Centre (TCBC), Department of Biomaterials Science, Institute of Dentistry, University of Turku and Biocity Turku Biomaterials Research Program and City of Turku Welfare Division, Itäinen pitkäkatu 4B (PharmaCity), FI-20520 Turku, Finland
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Aleisa K, Al-Dwairi ZN, Alsubait SA, Morgano SM. Pull-out retentive strength of fiber posts cemented at different times in canals obturated with a eugenol-based sealer. J Prosthet Dent 2016; 116:85-90. [PMID: 26922207 DOI: 10.1016/j.prosdent.2015.12.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 12/18/2015] [Accepted: 12/28/2015] [Indexed: 11/18/2022]
Abstract
STATEMENT OF PROBLEM Currently, no standard luting protocol exists for fiber posts. In addition, no agreement has been reached on the time interval between canal obturation and post space preparation and cementation. PURPOSE The purpose of this in vitro study was to evaluate the retention of fiber posts cemented with 3 different types of cement: Paracore, Variolink II, and RelyX Unicem cement after 24 hours or 2 weeks in root canals obturated with gutta percha and a eugenol-based sealer. MATERIAL AND METHODS Seventy-two caries-free, freshly extracted, single-rooted human mandibular first premolar teeth with straight root canals were prepared and obturated with gutta percha and Endofil sealer. Specimens were divided into 2 groups (n=36): post spaces prepared 24 hours after obturation and post spaces prepared 2 weeks after obturation. Posts in both groups were luted with 1 of 3 different luting agents (n=12), ParaCore, Variolink II, or RelyX Unicem cement. Each tooth specimen was vertically secured in a universal testing machine, and a constant pull-out loading rate of 0.5 mm/min was applied until cement failure occurred. Data were statistically analyzed with 2-way and 1-way ANOVAs and t tests. RESULTS Two-way ANOVA indicated statistically significant differences in mean post retention among the 3 cement types (P<.001) and among the means of the different time intervals investigated (P<.001). Significant differences were noted among all cement types tested between the 24-hour and 2-week time intervals (P<.05). CONCLUSIONS Time elapsed between canal obturation and post cementation significantly influenced fiber post retention, regardless of the type of resin cement. Fiber posts showed significantly higher retention if cemented after 24 hours of obturation than if cementation occurred after 2 weeks.
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Affiliation(s)
- Khalil Aleisa
- Professor, Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
| | - Ziad Nawaf Al-Dwairi
- Professor, Department of Prosthodontics, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan
| | - Sara A Alsubait
- Assistant Professor, Division of Endodontic Dentistry, Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Steven M Morgano
- Professor, Department of Restorative Dentistry, Rutgers School of Dental Medicine, Newark, NJ
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A novel zirconia fibre-reinforced resin composite for dental use. J Mech Behav Biomed Mater 2016; 53:151-160. [DOI: 10.1016/j.jmbbm.2015.08.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 08/03/2015] [Accepted: 08/09/2015] [Indexed: 11/21/2022]
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AlJehani YA, Baskaradoss JK, Geevarghese A, AlShehry MA, Vallittu PK. Shear Bond Strength between Fiber-Reinforced Composite and Veneering Resin Composites with Various Adhesive Resin Systems. J Prosthodont 2015. [DOI: 10.1111/jopr.12315] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Yousef A. AlJehani
- Dental Health Department, College of Applied Medical Sciences; King Saud University; Riyadh Saudi Arabia
| | - Jagan K. Baskaradoss
- Department of Community Dentistry, School of Dental Medicine; Case Western Reserve University; Cleveland OH
- College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences; King Abdulaziz Medical City; Riyadh Saudi Arabia
| | - Amrita Geevarghese
- College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences; King Abdulaziz Medical City; Riyadh Saudi Arabia
| | - Marey A. AlShehry
- College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences; King Abdulaziz Medical City; Riyadh Saudi Arabia
| | - Pekka K. Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre, Professor and Chair of Biomaterials Science, Director of Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, and City of Turku; Welfare Division; Turku Finland
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Malmstrom H, Dellanzo-Savu A, Xiao J, Feng C, Jabeen A, Romero M, Huang J, Ren Y, Yunker MA. Success, clinical performance and patient satisfaction of direct fibre-reinforced composite fixed partial dentures - a two-year clinical study. J Oral Rehabil 2015; 42:906-13. [PMID: 26172283 DOI: 10.1111/joor.12327] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2015] [Indexed: 11/29/2022]
Affiliation(s)
- H. Malmstrom
- Division of General Dentistry; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
| | - A. Dellanzo-Savu
- Division of General Dentistry; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
| | - J. Xiao
- Division of General Dentistry; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
| | - C. Feng
- Department of Biostatistics and Computational Biology; University of Rochester; Rochester NY USA
| | - A. Jabeen
- University of Detroit Mercy School of Dentistry; Detroit MI USA
| | - M. Romero
- Operative Dentistry; Georgia Regents University; Augusta GA USA
| | - J. Huang
- General Dentistry Department; College of Stomatology; Peking University; Beijing China
| | - Y. Ren
- Division of General Dentistry; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
| | - M. A. Yunker
- Division of General Dentistry; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
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Van Rensburg JJJ. Fibre-reinforced composite (FRC) bridge--a minimally destructive approach. ACTA ACUST UNITED AC 2015; 42:360-2, 365-6. [PMID: 26062261 DOI: 10.12968/denu.2015.42.4.360] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Replacing missing teeth is an integral part of the clinical services of the dental practitioner. The fibre-reinforced composite (FRC) bridge is a relatively new method for replacing missing teeth. This article will explain and discuss this alternative treatment option. Practical instructions on how to construct a FRC bridge will be given, by means of a clinical case. Different technique options will be illustrated to provide the reader with a good understanding of the most practical way to use the FRC strips. The fibre-reinforced composite provides a non-destructive, aesthetically pleasing and cost-effective way to restore missing teeth. Clinical Relevance: Minimally invasive options should always be considered and destruction of healthy enamel and dentine during the preparation phase of a replacement treatment should be avoided as much as possible.
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AlJehani YA, Baskaradoss JK, Geevarghese A, AlShehry MA, Vallittu PK. Shear bond strength between alumina substrate and prosthodontic resin composites with various adhesive resin systems. BMC Oral Health 2015; 15:55. [PMID: 25934420 PMCID: PMC4436791 DOI: 10.1186/s12903-015-0041-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 04/23/2015] [Indexed: 12/02/2022] Open
Abstract
Background With the increase in demand for cosmetics and esthetics, resin composite restorations and all-ceramic restorations have become an important treatment alternative. Taking into consideration the large number of prosthodontic and adhesive resins currently available, the strength and durability of these materials needs to be evaluated. This laboratory study presents the shear bond strengths of a range of veneering resin composites bonded to all-ceramic core material using different adhesive resins. Methods Alumina ceramic specimens (Techceram Ltd, Shipley, UK) were assigned to three groups. Three types of commercially available prosthodontic resin composites [BelleGlass®, (BG, Kerr, CA, USA), Sinfony® (SF, 3 M ESPE, Dental Products, Germany), and GC Gradia® (GCG, GC Corp, Tokyo, Japan)] were bonded to the alumina substrate using four different adhesive resins. Half the specimens per group (N = 40) were stored dry for 24 hours, the remaining were stored for 30 days in water. The bonding strength, so-called shear bond strengths between composite resin and alumina substrate were measured. Data were analysed statistically and variations in bond strength within each group were additionally evaluated by calculating the Weibull modulus. Results Bond strengths were influenced by the brand of prosthodontic resin composites. Shear bond strengths of material combinations varied from 24.17 ± 3.72–10.15 ± 3.69 MPa and 21.20 ± 4.64–7.50 ± 4.22 at 24 h and 30 days, respectively. BG resin composite compared with the other resin composites provided the strongest bond with alumina substrate (p < 0.01). SF resin composite was found to have a lower bond strength than the other composites. The Weibull moduli were highest for BG, which was bonded by using Optibond Solo Plus adhesive resin at 24 h and 30 days. There was no effect of storage time and adhesive brand on bond strength. Conclusion Within the limitations of this study, the shear bond strengths of composite resins to alumina substrate are related to the composite resins.
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Affiliation(s)
- Yousef A AlJehani
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
| | - Jagan K Baskaradoss
- Department of Dental Public Health, School of Dentistry, Case Western Reserve University, Cleveland, OH, 44106, USA. .,College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Amrita Geevarghese
- College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Marey A AlShehry
- College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
| | - Pekka K Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre, Professor and Chair of Biomaterials Science, Director of Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku and City of Turku, Welfare Division, Turku, Finland.
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Savi A, Parma Benfenati S, Tamani M, Turillazzi O. Maryland bridge in composito rinforzato con fibre ed elemento in ceramica. Caso clinico a 10 anni. DENTAL CADMOS 2015. [DOI: 10.1016/s0011-8524(15)30039-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Penetration depth of monomer systems into acrylic resin denture teeth used as pontics. J Prosthet Dent 2015; 113:480-7. [PMID: 25749088 DOI: 10.1016/j.prosdent.2014.10.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 10/02/2014] [Accepted: 10/02/2014] [Indexed: 11/24/2022]
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41
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The influence of polymerization type and reinforcement method on flexural strength of acrylic resin. ScientificWorldJournal 2015; 2015:919142. [PMID: 25879079 PMCID: PMC4386715 DOI: 10.1155/2015/919142] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 09/15/2014] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to evaluate the flexural strength of acrylic resin bars by varying the types of resin polymerization and reinforcement methods. Fourteen groups (N = 10) were created by the interaction of factors in study: type of resin (self-cured (SC) or heat-cured (HC)) and reinforcement method (industrialized glass fiber (Ind), unidirectional glass fiber (Uni), short glass fiber (Short), unidirectional and short glass fiber (Uni-Short), thermoplastic resin fiber (Tpl), and steel wire (SW)). Reinforced bars (25 × 2 × 2 mm) were tested in flexural strength (0.5 mm/min) and examined by scanning electron microscopy (SEM). Data (MPa) were submitted to factorial analysis, ANOVA, and Tukey and T-student tests (a = 5%) showing significant interaction (P = 0.008), for SC: Uni (241.71 ± 67.77)a, Uni-Short (221.05 ± 71.97)a, Ind (215.21 ± 46.59)ab, SW (190.51 ± 31.49)abc, Short (156.31 ± 28.76)bcd, Tpl (132.51 ± 20.21)cd, Control SC (101.47 ± 19.79)d and for HC: Ind (268.93 ± 105.65)a, Uni (215.14 ± 67.60)ab, Short (198.44 ± 95.27)abc, Uni-Short (189.56 ± 92.27)abc, Tpl (161.32 ± 62.51)cd, SW (106.69 ± 28.70)cd, and Control HC (93.39 ± 39.61)d. SEM analysis showed better fiber-resin interaction for HC. Nonimpregnated fibers, irrespective of their length, tend to improve fracture strength of acrylics.
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Miettinen M, Millar BJ. A review of the success and failure characteristics of resin-bonded bridges. Br Dent J 2015; 215:E3. [PMID: 23887555 DOI: 10.1038/sj.bdj.2013.686] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2013] [Indexed: 11/09/2022]
Abstract
OBJECTIVES This literature review was designed to assess and compare the success rates and modes of failure of metal-framed, fibre-reinforced composite and all-ceramic resin-bonded bridges. MATERIALS AND METHOD A Medline search (Ovid), supplemented by hand searching, was conducted to identify prospective and retrospective cohort studies on different resin-bonded bridges within the last 16 years. A total of 49 studies met the pre-set inclusion criteria. Success rates of 25 studies on metal-framed, 17 studies on fibre-reinforced composite and 7 studies on all-ceramic resin-bonded bridges were analysed and characteristics of failures were identified. RESULTS The analysis of the studies indicated an estimation of annual failure rates per year to be 4.6% (±1.3%, 95% CI) for metal-framed, 4.1% (±2.1%, 95% CI) for fibre-reinforced and 11.7% (±1.8%, 95% CI) for all-ceramic resin-bonded bridges. The most frequent complications were: debonding for metal-framed, resin-bonded bridges (93% of all failures); delamination of the composite veneering material for the fibre-reinforced bridges (41%) and fracture of the framework for the all-ceramic bridges (57%). CONCLUSIONS All types of resin-bonded bridges provide an effective short- to medium-term option, with all-ceramic performing least well and having the least favourable mode of failure. The methods of failures were different for different bridges with metal frameworks performing the best over time.
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Affiliation(s)
- M Miettinen
- Restorative Dentistry, King's College London, Primary Care Dentistry, King's College London Dental Institute at Guy's, King's College & St. Thomas' Hospitals, Bessemer Road, London, SE5 9RW, UK
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Vallittu PK, Närhi TO, Hupa L. Fiber glass–bioactive glass composite for bone replacing and bone anchoring implants. Dent Mater 2015; 31:371-81. [DOI: 10.1016/j.dental.2015.01.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/30/2014] [Accepted: 01/07/2015] [Indexed: 10/24/2022]
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High-aspect ratio fillers: Fiber-reinforced composites and their anisotropic properties. Dent Mater 2015; 31:1-7. [DOI: 10.1016/j.dental.2014.07.009] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 07/11/2014] [Accepted: 07/14/2014] [Indexed: 11/20/2022]
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A TM, P K V. Effects of Fiber-reinforced Composite Bases on Microleakage of Composite Restorations in Proximal Locations. Open Dent J 2014; 8:213-9. [PMID: 25512764 PMCID: PMC4265849 DOI: 10.2174/1874210601408010213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/10/2014] [Accepted: 09/28/2014] [Indexed: 12/03/2022] Open
Abstract
Objectives: The aim of this study was to evaluate the microleakage of direct restorative composite resin upon the addition of an intermediate glass fiber-reinforced composite (GFRC) layer of various fiber orientations between tooth and particulate filler composite resin (PFRC). Materials and Methods:
Cavities were prepared both on the mesial and distal surfaces of sixty extracted human molars with one margin placed below and the other above the cementoenamel junction (CEJ). Teeth were assigned to five different groups. Four of the groups received a layer of semi-interpenetrating polymer network (semi-IPN) resin system impregnated E-glass GFRC at the bottom of the cavity: Group 1; unidirectional continuous GFRC (EVS) in buccolingual direction (EVS-BL), Group 2; EVS in mesiodistal direction (EVS-MD), Group 3; bidirectional woven GFRC (EVN), Group 4; multidirectional short GFRC (EXP-MLT), Group 5; PRFC only (control). After acid etching and priming of the cavities and insertion of GFRC layer with the adhesive resin (Scotchbond Multipurpose 3M-ESPE), the cavities were filled incrementally with PRFC (Filtek Z250, 3M-ESPE) and each layer was light cured for 20 s. After finishing and polishing, the restored teeth were water-stored for 24 h at 37 °C and then thermocycled for 6000 cycles between 5-55 °C, before immersion in 0.5 % basic fuchsin dye for 24 h. After sectioning by 3-5 sagittal cuts, each sequential section was imaged and digitally analyzed to determine the stain depth. Results: All GFRC groups in dentin revealed significantly lower microleakage compared to control (p<0.05). The orientation of FRC intermediate layer did not reveal significant differences in microleakage (p>0.05). The microleakeage in enamel was not different between the groups (p>0.05). Conclusion:
Use of intermediate GFRC layer between tooth and PFRC could provide alternative method to minimize microleakage. Clinical Relevance: Use of GFRC intermediate layer underneath the particulate filler composite can be used to minimize the leakeage of the restorations.
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Affiliation(s)
- Tezvergil-Mutluay A
- Department of Restorative Dentistry and Cariology, Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, TYKS, Turku University Hospital, Turku, Finland
| | - Vallittu P K
- Department of Biomaterials Science, and Turku Clinical Biomaterials Centre - TCBC Institute of Dentistry, University of Turku, Turku, Finland
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Moritz N, Strandberg N, Zhao D, Mattila R, Paracchini L, Vallittu P, Aro H. Mechanical properties and in vivo performance of load-bearing fiber-reinforced composite intramedullary nails with improved torsional strength. J Mech Behav Biomed Mater 2014; 40:127-139. [DOI: 10.1016/j.jmbbm.2014.08.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Revised: 08/16/2014] [Accepted: 08/22/2014] [Indexed: 10/24/2022]
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Nganga S, Moritz N, Kolakovic R, Jakobsson K, Nyman JO, Borgogna M, Travan A, Crosera M, Donati I, Vallittu PK, Sandler N. Inkjet printing of Chitlac-nanosilver—a method to create functional coatings for non-metallic bone implants. Biofabrication 2014; 6:041001. [DOI: 10.1088/1758-5082/6/4/041001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Frese C, Schiller P, Staehle HJ, Wolff D. Fiber-reinforced composite fixed dental prostheses in the anterior area: A 4.5-year follow-up. J Prosthet Dent 2014; 112:143-9. [PMID: 24529838 DOI: 10.1016/j.prosdent.2013.10.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 10/16/2013] [Accepted: 10/21/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Cornelia Frese
- Senior Dentist, Department of Conservative Dentistry, School of Dental Medicine, University Hospital Heidelberg, Heidelberg, Germany.
| | - Petra Schiller
- Statistician, Institute of Medical Biometry and Informatics, Ruprecht Karls University Heidelberg, Heidelberg, Germany
| | - Hans Joerg Staehle
- Department Head, Department of Conservative Dentistry, School of Dental Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Diana Wolff
- Assistant Professor, Department of Conservative Dentistry, School of Dental Medicine, University Hospital Heidelberg, Heidelberg, Germany
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Kallio TT, Lastumäki TM, Lassila LVJ, Vallittu PK. Influence of intermediate resin on the bond strength of light-curing composite resin to polymer substrate. Acta Odontol Scand 2014; 72:202-8. [PMID: 23808499 DOI: 10.3109/00016357.2013.810773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES The aim of this study was to examine the effect of intermediate resin (IMR) of different monomer compositions and viscosities on the shear bond strength between polymer substrate and light-curing composite. METHODS The substrate used in the study was an autopolymerizing polymethyl methacrylate (PMMA) based polymer. The substrate was treated with the IMR for 3 min before application of light polymerizable particulate filler composite resin. The monomers of the IMR were either bisphenol-A-glycidyl dimethacrylate (BisGMA) and triethyleneglycol dimethacrylate (TEGDMA) or BisGMA and methyl methacrylate (MMA). The shear bond strength of the IMR treated substrate to the particulate filler composite was evaluated after storing the specimens dry and after thermocycling the specimens in water. Light microscope examination was accomplished to determine the swelled layer of the substrate. RESULTS Significant differences were found between the shear bond strength values of the IMRs (p < 0.001). The bond strengths were generally higher in the BisGMA-MMA groups than in the BisGMA-TEGDMA groups. Two-way ANOVA revealed significant effects of type of IMR (p < 0.001) and thermocycling (p = 0.017) on the shear bond strength. No interaction was found between these variables (p > 0.05). CONCLUSIONS The results suggest that the monomer composition and ratio of the IMRs used in the study influence the shear bond strength of the polymer substrate to the new resin.
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Affiliation(s)
- Timo T Kallio
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku , Turku , Finland
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50
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Ylä-Soininmäki A, Moritz N, Lassila LVJ, Peltola M, Aro HT, Vallittu PK. Characterization of porous glass fiber-reinforced composite (FRC) implant structures: porosity and mechanical properties. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2683-2693. [PMID: 23929214 DOI: 10.1007/s10856-013-5023-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 07/26/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to characterize the microstructure and mechanical properties of porous fiber-reinforced composites (FRC). Implants made of the FRC structures are intended for cranial applications. The FRC specimens were prepared by impregnating E-glass fiber sheet with non-resorbable bifunctional bis-phenyl glycidyl dimethacrylate and triethylene glycol dimethacrylate resin matrix. Four groups of porous FRC specimens were prepared with a different amount of resin matrix. Control group contained specimens of fibers, which were bound together with sizing only. Microstructure of the specimens was analyzed using a micro computed tomography (micro-CT) based method. Mechanical properties of the specimens were measured with a tensile test. The amount of resin matrix in the specimens had an effect on the microstructure. Total porosity was 59.5 % (median) in the group with the lowest resin content and 11.2 % (median) in the group with the highest resin content. In control group, total porosity was 94.2 % (median). Correlations with resin content were obtained for all micro-CT based parameters except TbPf. The tensile strength of the composites was 21.3 MPa (median) in the group with the highest resin content and 43.4 MPa (median) in the group with the highest resin content. The tensile strength in control group was 18.9 MPa (median). There were strong correlations between the tensile strength of the specimens and most of the micro-CT based parameters. This experiment suggests that porous FRC structures may have the potential for use in implants for cranial bone reconstructions, provided further relevant in vitro and in vivo tests are performed.
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Affiliation(s)
- Anne Ylä-Soininmäki
- Orthopedic Research Unit, Department of Orthopedic Surgery and Traumatology, University of Turku, 20520, Turku, Finland
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