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Dobrzyński M, Szymonowicz M, Nowicka J, Pajączkowska M, Nikodem A, Kuropka P, Wawrzyńska M, Rusak A. Three-Dimensional-Printed Modular Titanium Alloy Plates for Osteosynthesis of the Jawbone. Biomedicines 2024; 12:1466. [PMID: 39062039 PMCID: PMC11274415 DOI: 10.3390/biomedicines12071466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 06/27/2024] [Accepted: 06/27/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUNDS The titanium-aluminum-vanadium alloy (Ti-6Al-4V) is frequently used in implantology due to its biocompatibility. The use of 3D printing enables the mechanical modification of implant structures and the adaptation of their shape to the specific needs of individual patients. METHODS The titanium alloy plates were designed using the 3D CAD method and printed using a 3D SLM printer. Qualitative tests were performed on the material surface using a microcomputed tomography scanner. The cytotoxicity of the modular titanium plates was investigated using the MTT assay on the L929 cell line and in direct contact with Balb/3T3 cells. Cell adhesion to the material surface was evaluated with hFOB1.19 human osteoblasts. Microbial biofilm formation was investigated on strains of Lactobacillus rhamnosus, Staphylococcus epidermidis, Streptococcus mutans and Candida albicans using the TTC test and scanning electron microscopy (SEM). RESULTS The surface analysis showed the hydrophobic nature of the implant. The study showed that the titanium plates had no cytotoxic properties. In addition, the material surface showed favorable properties for osteoblast adhesion. Among the microorganisms tested, the strains of S. mutans and S. epidermidis showed the highest adhesion capacity to the plate surface, while the fungus C. albicans showed the lowest adhesion capacity. CONCLUSIONS The manufactured modular plates have properties that are advantageous for the implantation and reduction in selected forms of microbial biofilm. Three-dimensional-printed modular titanium plates were investigated in this study and revealed the potential clinical application of this type of materials, regarding lack of cytotoxicity, high adhesion properties for osteoblasts and reduction in biofilm formation. The 3D CAD method allows us to personalise the shape of implants for individual patients.
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Affiliation(s)
- Maciej Dobrzyński
- Department of Pediatric Dentistry and Preclinical Dentistry, Wroclaw Medical University, 50-425 Wroclaw, Poland;
| | - Maria Szymonowicz
- Pre-Clinical Research Centre, Wroclaw Medical University, 50-368 Wroclaw, Poland; (M.S.); (M.W.)
| | - Joanna Nowicka
- Department and Division of Microbiology, Faculty of Medicine, Wroclaw Medical University, 50-556 Wroclaw, Poland; (J.N.); (M.P.)
| | - Magdalena Pajączkowska
- Department and Division of Microbiology, Faculty of Medicine, Wroclaw Medical University, 50-556 Wroclaw, Poland; (J.N.); (M.P.)
| | - Anna Nikodem
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 50-371 Wroclaw, Poland;
| | - Piotr Kuropka
- Division of Histology and Embryology, Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, 50-366 Wroclaw, Poland;
| | - Magdalena Wawrzyńska
- Pre-Clinical Research Centre, Wroclaw Medical University, 50-368 Wroclaw, Poland; (M.S.); (M.W.)
| | - Agnieszka Rusak
- Division of Histology and Embryology, Department of Human Morphology and Embryology, Faculty of Medicine, Wroclaw Medical University, 50-368 Wroclaw, Poland
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ElAziz RHA, ElAziz SAA, ElAziz PMA, Frater M, Vallittu PK, Lassila L, Garoushi S. Clinical evaluation of posterior flowable short fiber-reinforced composite restorations without proximal surface coverage. Odontology 2024:10.1007/s10266-024-00905-5. [PMID: 38393515 DOI: 10.1007/s10266-024-00905-5] [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: 09/29/2023] [Accepted: 01/11/2024] [Indexed: 02/25/2024]
Abstract
The purpose of this clinical trail was to assess the clinical behavior of posterior composite restorations supported by a substantial foundation of flowable short fiber-reinforced composite SFRC (everX Flow, GC, Japan) used without proximal surface coverage with particulate filler resin composite (PFC). Seventy patients (20 males, 50 females; mean age: 30 ± 10 years) were randomly enrolled in this trial. Patients received direct restorations of either SFRC covered only on the occlusal surface (1-2 mm) by conventional PFC composite (G-ænial Posterior, GC), or plain conventional PFC composite without fiber-reinforcement, in Class II cavities in premolar and molar vital teeth. One operator made all restorations using one-step, self-etch bonding agent (G-ænial Bond, GC) according to manufacturers' recommendations. Two blinded trained operators evaluated the restorations at baseline, at 6, 12 and 18 months using modified USPHS criteria. Results indicated that, in both groups and at different follow-up intervals, according to evaluated criteria, restorations were rated mostly with best score (Alpha) (p > 0.05). For the marginal integrity after 6 months, a single case in the intervention [increased to 3 (8.8%) after 18 months] and 3 (9.7%) cases of the control group [increased to 4 (12.9%) after 18 months] had Bravo score but with no significant difference (p > 0.05). For color match measured after 6 and 18 months, three (8.8%) cases had Bravo score in the intervention group. The use of flowable SFRC composite without any PFC surface coverage proximally in Class II restorations demonstrated satisfactory clinical outcome throughout the 18-month follow-up.
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Affiliation(s)
- Rawda H Abd ElAziz
- Conservative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Sherifa A Abd ElAziz
- Conservative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Possy M Abd ElAziz
- Conservative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Mark Frater
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, Szeged, Hungary
| | - Pekka K Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B, 20520, Turku, Finland
- Wellbeing Services County of South-West Finland, Turku, Finland
| | - Lippo Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B, 20520, Turku, Finland
| | - Sufyan Garoushi
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B, 20520, Turku, Finland.
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Sunarintyas S, Siswomihardjo W, Tsoi JK, Matinlinna JP. Biocompatibility and mechanical properties of an experimental E-glass fiber-reinforced composite for dentistry. Heliyon 2022; 8:e09552. [PMID: 35711989 PMCID: PMC9192806 DOI: 10.1016/j.heliyon.2022.e09552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 03/04/2022] [Accepted: 05/23/2022] [Indexed: 11/25/2022] Open
Abstract
Objectives To evaluate the biocompatibility and mechanical properties of experimental bis-phenol-A and bis-GMA free E-glass fiber-reinforced composites (FRCs) prepared with hexanediol dimethacrylate (HDDMA) based resin. Methods Two ratios of HDDMA/TEGDMA resin were evaluated: exp-1 (70/30 wt.%) and exp-2 (50/50 wt.%) with two bis-GMA resin control groups (bis-GMA/MMA and bis-GMA/TEGDMA resins, both 70/30 wt.%). E-glass fibers were embedded into the resins to prepare FRCs specimens. Biocompatibility was assessed for cytoviability and biofilm formation with Streptococcus mutans, Streptococcus sanguinis, Enterococcus faecalis, and Candida albicans. Mechanical properties were evaluated for flexural strength and hardness (24 h, water storage 1 and 28 days), water sorption (1, 7, 14, and 28 days), contact angle, and surface roughness. The data were analyzed statistically by one-way and two-way ANOVA (p < 0.05). Results Cytoviability of the experimental groups was significantly higher than the control groups (p < 0.05). The exp-1 cytoviability (98.2 ± 1.3%) met the ISO 10993-5 standard requirement for noncytotoxic materials. The adherence of bacteria to the experimental FRCs was visibly less than the controls, while Candida albicans adhered visibly more to the experimental groups than the controls (p < 0.05). Flexural strength showed slightly higher values for controls than for the experimental groups. The exp-1 hardness value was significantly higher in the control groups for all storage conditions (p < 0.05). The water sorption of the experimental groups was significantly higher than the controls. The surface roughness indicated no significant difference (p = 0.87). The exp-1 showed a higher contact angle with the control groups. Conclusion The experimental HDDMA/TEGDMA-based FRCs might be potential alternatives for bis-GMA-based FRCs. Clinical significance The HDDMA/TEGDMA E-glass FRCs might provide biocompatible restorations.
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Affiliation(s)
- Siti Sunarintyas
- Dental Biomaterial Department, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Widowati Siswomihardjo
- Dental Biomaterial Department, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - James K.H. Tsoi
- Dental Materials Science, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Jukka P. Matinlinna
- Dental Materials Science, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
- Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester, United Kingdom
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Bijelic-Donova J, Garoushi S, Lassila LV, Rocca GT, Vallittu PK. Crack propagation and toughening mechanism of bilayered short-fiber reinforced resin composite structure -Evaluation up to six months storage in water. Dent Mater J 2022; 41:580-588. [PMID: 35584936 DOI: 10.4012/dmj.2021-321] [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] [Indexed: 11/23/2022]
Abstract
Clinically relevant parameters, such as stress intensity factor of bilayered resin composite structure with short fiber base and its stability over time, has yet to be investigated. This study investigated the stress intensity factor of pre-cracked bilayered specimens composed of short fiber resin composite base (SFC) and particulate filler resin composite (PFC) as veneering layer, with a crack located in the PFC layer, 0.5 mm away from the PFC-SFC interface. Monolayered specimens served as controls. All specimens were stored in water at 37°C either for 1 week, 1 month or 6 months before testing. Two-way ANOVA (p=0.05) was used to determine the differences among the groups. Results indicated that SFC base improve the brittleness of the PFC. The type of short fibers affected the crack propagation; fiber bridging in millimeter-scale SFC was the main crack arresting mechanism, whereas fiber pulling observed in micrometer-scale SFC mainly deviated the crack path.
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Affiliation(s)
- Jasmina Bijelic-Donova
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku
| | - Sufyan Garoushi
- Department of Biomaterials Science, Institute of Dentistry, University of Turku
| | - Lippo Vj Lassila
- Department of Biomaterials Science, Institute of Dentistry, University of Turku
| | | | - Pekka K Vallittu
- Department of Biomaterials Science, Institute of Dentistry, University of Turku.,City of Turku Welfare Division, Oral Health Care
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The Effect of Ultraviolet Treatment on TiO2 Nanotubes: A Study of Surface Characteristics, Bacterial Adhesion, and Gingival Fibroblast Response. METALS 2022. [DOI: 10.3390/met12010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Titanium dioxide (TiO2) nanotubes are emerging as a provocative target for oral implant research. The aim of this study was to evaluate the effect of UV on the wettability behavior, bacterial colonization, and fibroblast proliferation rate of TiO2 nanotube surfaces prepared using different anodization voltages and aimed for use as implant abutment materials. Four different experimental materials were prepared: (1) TiO2 nanotube 10 V; (2) TiO2 nanotube 15 V; (3) TiO2 nanotube 20 V; and (4) commercial pure titanium as a control group. TiO2 nanotube arrays were prepared in an aqueous electrolyte solution of hydrofluoric acid (HF, 0.5 vol.%). Different anodization voltages were used to modify the morphology of the TiO2 nanotubes. Equilibrium contact angles were measured using the sessile drop method with a contact angle meter. The investigated surfaces (n = 3) were incubated at 37 °C in a suspension of Streptococcus mutans (S. mutans) for 30 min for bacterial adhesion and 3 days for biofilm formation. Human gingival fibroblasts were plated and cultured on the experimental substrates for up to 7 days and the cell proliferation rate was assessed using the AlamarBlue assayTM (BioSource International, Camarillo, CA, USA). The data were analyzed using one-way ANOVA followed by Tukey’s post-hoc test. Water contact angle measurements on the TiO2 after UV treatment showed an overall hydrophilic behavior regardless of the anodization voltage. The ranking of the UV-treated surfaces of experimental groups from lowest to highest for bacterial adhesion was: TiO2 nanotube 20 V < Ti and TiO2 nanotube 15 V < TiO2 nanotube 10 V (p < 0.05), and for bacterial biofilm formation was: TiO2 nanotube 20 V-TiO2 nanotube 10 V < Ti-TiO2 nanotube 15 V (p < 0.05). Fibroblast cell proliferation was lower on TiO2 nanotube surfaces throughout the incubation period and UV light treatment showed no enhancement in cellular response. UV treatment enhances the wettability behavior of TiO2 nanotube surfaces and could result in lower bacterial adhesion and biofilm formation.
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Dhall A, Islam S, Park M, Zhang Y, Kim A, Hwang G. Bimodal Nanocomposite Platform with Antibiofilm and Self-Powering Functionalities for Biomedical Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:40379-40391. [PMID: 34406755 PMCID: PMC8548987 DOI: 10.1021/acsami.1c11791] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Advances in microelectronics and nanofabrication have led to the development of various implantable biomaterials. However, biofilm-associated infection on medical devices still remains a major hurdle that substantially undermines the clinical applicability and advancement of biomaterial systems. Given their attractive piezoelectric behavior, barium titanate (BTO)-based materials have also been used in biological applications. Despite its versatility, the feasibility of BTO-embedded biomaterials as anti-infectious implantable medical devices in the human body has not been explored yet. Here, the first demonstration of clinically viable BTO-nanocomposites is presented. It demonstrates potent antibiofilm properties against Streptococcus mutans without bactericidal effect while retaining their piezoelectric and mechanical behaviors. This antiadhesive effect led to ∼10-fold reduction in colony-forming units in vitro. To elucidate the underlying mechanism for this effect, data depicting unfavorable interaction energy profiles between BTO-nanocomposites and S. mutans using the classical and extended Derjaguin, Landau, Verwey, and Overbeek theories is presented. Direct cell-to-surface binding force data using atomic force microscopy also corroborate reduced adhesion between BTO-nanocomposites and S. mutans. Interestingly, the poling process on BTO-nanocomposites resulted in asymmetrical surface charge density on each side, which may help tackle two major issues in prosthetics-bacterial contamination and tissue integration. Finally, BTO-nanocomposites exhibit superior biocompatibility toward human gingival fibroblasts and keratinocytes. Overall, BTO-embedded composites exhibit broad-scale potential to be used in biological settings as energy-harvestable antibiofilm surfaces.
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Affiliation(s)
- Atul Dhall
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sayemul Islam
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA 19122, USA
| | - Moonchul Park
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA 19122, USA
| | - Yu Zhang
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Albert Kim
- Department of Electrical and Computer Engineering, Temple University, Philadelphia, PA 19122, USA
- Corresponding Authors: Geelsu Hwang, ; Albert Kim,
| | - Geelsu Hwang
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
- Corresponding Authors: Geelsu Hwang, ; Albert Kim,
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Wang T, Matinlinna JP, Burrow MF, Ahmed KE. The biocompatibility of glass-fibre reinforced composites (GFRCs) - a systematic review. J Prosthodont Res 2021; 65:273-283. [PMID: 34421062 DOI: 10.2186/jpr.jpr_d_20_00031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Purpose Fiber-reinforced composites (FRCs) have received considerable attention, owing to their potential use in dental prostheses or bone fracture fixation applications. The aim of this systematic review was to analyze and report the biological properties of FRCs reported in the existing literature.Study selections A systematic search of four databases (PubMed/MEDLINE, Scopus, Web of Science, and Cochrane library) was performed to identify all relevant studies published between 1962 and 2019. The search was limited to laboratory-based studies published in English. Citation mining was also performed through cross-referencing of included studies and hand searching of relevant journals.Results A total of 1283 potentially relevant articles were initially identified, and thirty-three articles were full-text screened. In the final ten studies included for review, four investigated bacterial adhesion and growth abilities on FRCs, four investigated the fibroblastic cytotoxicity of different surface-treated FRCs, and two investigated the osseointegration between bone and FRCs. Owing to the heterogeneity of fiber types, FRC-coating, and lack of standardized testing protocols, a meta-analysis was not feasible. The included studies indicated that glass fibers, and in particular E-glass fibers, are superior to ceramics and other FRCs in terms of bacterial adherence, fibroblast cytotoxicity, and cell viability.Conclusions Glass-fiber-reinforced composites are cytocompatible materials that possess satisfactory biological properties and can be used in dental prosthesis and craniofacial implants. Further research is necessary to regulate the matrix ion release/degradation of FRCs to prolong the initially demonstrated properties.
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Affiliation(s)
- Ting Wang
- Prosthodontics, Division of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.,Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Jukka Pekka Matinlinna
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Michael Francis Burrow
- Prosthodontics, Division of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Khaled Elsayed Ahmed
- Prosthodontics Discipline, School of Dentistry and Oral Health, Griffith University, Gold Coast, Australia
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Wang T, Matinlinna JP, Burrow MF, Ahmed KE. The biocompatibility of glass-fibre reinforced composites (GFRCs) - a systematic review. J Prosthodont Res 2021. [PMID: 33612662 DOI: 10.2186/jpr.jpr_d20_00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE Fiber-reinforced composites (FRCs) have received considerable attention, owing to their potential use in dental prostheses or bone fracture fixation applications. The aim of this systematic review was to analyze and report the biological properties of FRCs reported in the existing literature. STUDY SELECTIONS A systematic search of four databases (PubMed/MEDLINE, Scopus, Web of Science, and Cochrane library) was performed to identify all relevant studies published between 1962 and 2019. The search was limited to laboratory-based studies published in English. Citation mining was also performed through cross-referencing of included studies and hand searching of relevant journals. RESULTS A total of 1283 potentially relevant articles were initially identified, and thirty-three articles were full-text screened. In the final ten studies included for review, four investigated bacterial adhesion and growth abilities on FRCs, four investigated the fibroblastic cytotoxicity of different surface-treated FRCs, and two investigated the osseointegration between bone and FRCs. Owing to the heterogeneity of fiber types, FRC-coating, and lack of standardized testing protocols, a meta-analysis was not feasible. The included studies indicated that glass fibers, and in particular E-glass fibers, are superior to ceramics and other FRCs in terms of bacterial adherence, fibroblast cytotoxicity, and cell viability. CONCLUSIONS Glass-fiber-reinforced composites are cytocompatible materials that possess satisfactory biological properties and can be used in dental prosthesis and craniofacial implants. Further research is necessary to regulate the matrix ion release/degradation of FRCs to prolong the initially demonstrated properties.
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Affiliation(s)
- Ting Wang
- Prosthodontics, Division of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR.,Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - Jukka Pekka Matinlinna
- Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - Michael Francis Burrow
- Prosthodontics, Division of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - Khaled Elsayed Ahmed
- Prosthodontics Discipline, School of Dentistry and Oral Health, Griffith University, Gold Coast
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Influence of different ceramic materials and surface treatments on the adhesion of Prevotella intermedia. J Mech Behav Biomed Mater 2020; 111:104010. [PMID: 32750671 DOI: 10.1016/j.jmbbm.2020.104010] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 12/17/2022]
Abstract
Ceramics are used in oral rehabilitation; however, these materials are prone to formation of biofilms that may cause periodontal diseases. This study aimed to evaluate the influence of distinct surface treatments on ceramic surface roughness and biofilm formation of oral bacteria (Prevotella intermedia). Eighty-four specimens of the following four ceramic systems were produced: LC - leucite-based glass ceramic, LD - lithium disilicate-based glass ceramic, LSZ - glass ceramic based on zirconia-reinforced lithium silicate, and ZR - monolithic zirconia. These were submitted to three different surface treatment protocols: C - control, G - glazing, and GDB - grinding with diamond bur (n = 7). The surface characteristics were assessed using a confocal laser microscope (Ra) and a scanning electron microscope (SEM). Thereafter, the groups were contaminated with a bacterial strain of P. intermedia ATCC 25611. The biofilms formed were quantified by counting the colony forming units (CFUs) and analyzed with scanning electron microscope (SEM) and confocal laser scanning microscope (CLSM). Data were analyzed by using a 2-way ANOVA and the Tukey test (ɑ = 0.05). Results showed that greater roughness was associated with GDB (p < 0.05). The same was also true for the ceramic material ZR (p < 0.05). There was a statistical significant difference in the CFU counts between the materials (p < 0.05) that revealed a greater amount of bacterial adhesion in the LC and ZR groups (p > 0.05). Thus, it was suggested that the surface roughness of the ceramic materials favored bacterial adhesion; and thus, finishing of ceramic surfaces with GDB should be avoided.
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10
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Mousavi A, Aliha MRM, Imani DM. Effects of biocompatible Nanofillers on mixed-mode I and II fracture toughness of PMMA base dentures. J Mech Behav Biomed Mater 2020; 103:103566. [PMID: 32090956 DOI: 10.1016/j.jmbbm.2019.103566] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 10/25/2022]
Abstract
A modified single edge cracked bend beam specimen called "inclined edge crack asymmetric bend" (IE-CAB) specimen was designed and proposed for investigating mixed mode I/II fracture toughness behavior of brittle materials. Using a large number of finite element analyses performed for different geometry and loading conditions, it was demonstrated that unlike the conventional single edge notch beam specimen, the IE-CAB configuration can provide full combinations of mode mixities from pure mode I to pure mode II. Then the IE-CAB specimen was employed for mixed mode I/II fracture toughness testing of two PMMA based denture materials (i.e. neat PMMA and toughened PMMA with Nano-hydroxyapatite (HAP)and Nano-alumina (Al2O3) particles). The obtained experimental results showed that adding bio-compatible (HAP and Al2O3) Nano-particles can increase both modes I and II fracture resistance (KIc and KIIc) values of base PMMA denture. However, the influence of such particles was more pronounced on enhancing mode I fracture toughness (KIc) value. Pure mode II fracture toughness value was obtained less than the pure mode I fracture toughness in the tested specimen showing the higher crack growth risk of such PMMA base dentures against dominantly shear loads. The well-known maximum tangential stress theory was also used for estimating the obtained experimental data both for mixed mode fracture toughness and fracture initiation direction in the tested PMMA base denture materials.
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Affiliation(s)
- A Mousavi
- Welding and Joining Research Center, School of Industrial Engineering, Iran University of Science and Technology (IUST), Narmak, 16486-13114, Tehran, Iran
| | - M R M Aliha
- Welding and Joining Research Center, School of Industrial Engineering, Iran University of Science and Technology (IUST), Narmak, 16486-13114, Tehran, Iran.
| | - D M Imani
- Welding and Joining Research Center, School of Industrial Engineering, Iran University of Science and Technology (IUST), Narmak, 16486-13114, Tehran, Iran
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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: 18] [Impact Index Per Article: 3.0] [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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Abushahba F, Söderling E, Aalto-Setälä L, Sangder J, Hupa L, Närhi TO. Antibacterial properties of bioactive glass particle abraded titanium against
Streptococcus mutans. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aabeee] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Mangoush E, Säilynoja E, Prinssi R, Lassila L, Vallittu PK, Garoushi S. Comparative evaluation between glass and polyethylene fiber reinforced composites: A review of the current literature. J Clin Exp Dent 2017; 9:e1408-e1417. [PMID: 29410756 PMCID: PMC5794118 DOI: 10.4317/jced.54205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 10/23/2017] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Fiber reinforced composite (FRC) is a promising class of material that gives clinicians alternative treatment options. There are many FRC products available in the market based on either glass or polyethylene fiber type. The aim of this study was to present a comparison between glass and polyethylene fiber reinforced composites based on available literature review. MATERIAL AND METHODS A thorough literature search, with no limitation, was done up to June 2017. The range of relevant publications was surveyed using PubMed and Google Scholar. From the search results, articles related to our search terms were only considered. An assessment of these articles was done by two individuals in order to include only articles directly compare between glass and polyethylene FRCs. The search terms used were "fiber reinforced dental composites" and "glass and polyethylene fibers in dentistry". RESULTS The search provided 276 titles. Full-text analysis was performed for 29 articles that met the inclusion criteria. Most were laboratory-based research with various test specimen designs prepared according to ISO standard or with extracted teeth and only three articles were clinical studies. Most of studies (n=23) found superior characteristics of glass FRCs over polyethylene FRCs. CONCLUSIONS Significant reinforcement differences between commercial glass and polyethylene fiber reinforced composites were found. Key words:Fiber reinforced composite, glass fiber, polyethylene fiber.
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Affiliation(s)
- Enas Mangoush
- Turku Clinical Biomaterial Center -TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Eija Säilynoja
- Turku Clinical Biomaterial Center -TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- Reseach Development and Production Department, Stick Tech Ltd - Member of GC Group, Turku, Finland
| | - Roosa Prinssi
- Reseach Development and Production Department, Stick Tech Ltd - Member of GC Group, Turku, Finland
| | - Lippo Lassila
- Turku Clinical Biomaterial Center -TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- Department of Biomaterials Science, Institute of Dentistry, University of Turku
| | - Pekka K Vallittu
- Turku Clinical Biomaterial Center -TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- Department of Biomaterials Science, Institute of Dentistry, University of Turku
- City of Turku Welfare Division, Oral Health Care, Turku, Finland
| | - Sufyan Garoushi
- Turku Clinical Biomaterial Center -TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- Department of Biomaterials Science, Institute of Dentistry, University of Turku
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Etxeberria M, Escuin T, Vinas M, Ascaso C. Useful surface parameters for biomaterial discrimination. SCANNING 2015; 37:429-437. [PMID: 26148576 DOI: 10.1002/sca.21232] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 05/30/2015] [Accepted: 06/04/2015] [Indexed: 06/04/2023]
Abstract
Topographical features of biomaterials' surfaces are determinant when addressing their application site. Unfortunately up to date there has not been an agreement regarding which surface parameters are more representative in discriminating between materials. Discs (n = 16) of different currently used materials for implant prostheses fabrication, such as cast cobalt-chrome, direct laser metal soldered (DLMS) cobalt-chrome, titanium grade V, zirconia (Y-TZP), E-glass fiber-reinforced composite and polyetheretherketone (PEEK) were manufactured. Nanoscale topographical surface roughness parameters generated by atomic force microscopy (AFM), microscale surface roughness parameters obtained by white light interferometry (WLI) and water angle values obtained by the sessile-water-drop method were analyzed in order to assess which parameter provides the best optimum surface characterization method. Correlations between nanoroughness, microroughness, and hydrophobicity data were performed to achieve the best parameters giving the highest discriminatory power. A subset of six parameters for surface characterization were proposed. AFM and WLI techniques gave complementary information. Wettability did not correlate with any of the nanoroughness parameters while it however showed a weak correlation with microroughness parameters.
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Affiliation(s)
- Marina Etxeberria
- Doctoral Student, Department of Dentistry and Department of Pathology and Experimental Therapeutics, Dentistry School, University of Barcelona, Barcelona, Spain
| | - Tomas Escuin
- Associate Professor, Laboratory of Prosthetic Dentistry, Dentistry School, University of Barcelona, Barcelona, Spain
| | - Miquel Vinas
- Department of Pathology and Experimental Therapeutics, Medical and Dentistry Schools, University of Barcelona, Barcelona, Spain
| | - Carlos Ascaso
- Department of Public Health, Medical School, University of Barcelona, Barcelona, Spain
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Nedeljkovic I, Teughels W, De Munck J, Van Meerbeek B, Van Landuyt KL. Is secondary caries with composites a material-based problem? Dent Mater 2015; 31:e247-77. [DOI: 10.1016/j.dental.2015.09.001] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 03/28/2015] [Accepted: 09/01/2015] [Indexed: 12/22/2022]
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Jalalian E, Mofrad G, Ahmadpour S. Adhesion of Streptococcus Mutans to Glass Ionomer, BisCem Cement and Enamel: An in Vitro Study. JOURNAL OF DENTISTRY (TEHRAN, IRAN) 2015; 12:678-85. [PMID: 27148379 PMCID: PMC4854747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
OBJECTIVES Considering the adhesion of some microorganisms such as Streptococcus mutans (S. mutans) to restorative materials and the unrecognized consequences of this phenomenon, and due to the controversies in this regard, it is important to discover the materials to which the lowest adhesion of S. mutans occurs. The objective of this study was to assess the level of adhesion of S. mutans to glass ionomer (GI), BisCem Cement and enamel. MATERIALS AND METHODS In this in vitro experimental study, 12 specimens including five GI blocks (GC America Inc., Alsip, IL, USA), five BisCem blocks (Bisco Inc., Schaumburg, IL, USA) and two enamel blocks were exposed to a bacterial suspension (1×10(6) mg/mL). After incubation for one hour at 37°C, the swab samples were taken and cultured in blood agar. The S. mutans colonies were counted by unaided vision after 48 hours of incubation. The results were analyzed using ANOVA followed by the Tukey's test. RESULTS The number of colonies attributed to enamel, GI, and BisCem blocks was 24±2, 24.2±2.7 and 14.8±1.7 colonies/mm(2), respectively. There was no difference between enamel and GI in terms of adhesion of S. mutans (P=0.08 and P>0.001, respectively); however, the difference between these two and BisCem was statistically significant (P= 0.00075 and P<0.001, respectively). CONCLUSION Within the limitations of this study, BisCem cement is superior to GI for the cementation of indirect restorations.
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Affiliation(s)
- Ezzatollah Jalalian
- Associate Professor, Department of Fix Prosthodontics, Member of Implant Research Center, Dental Branch, Azad University of Tehran, Iran
| | - Ghazal Mofrad
- Dentist, MPH, University of Nevada, LV, School of Community Health Sciences, Nevada, USA,Corresponding author: G. Mofrad, MPH, University of Nevada, LV, School of Community Health Sciences, Nevada, USA
| | - Sogol Ahmadpour
- Dentist, Resident of Oral & Maxillofacial Radiology, Department of Oral & Maxillofacial Radiology, Islamic Azad University, Tehran Dental Branch, Tehran, Iran
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He J, Söderling E, Lassila LVJ, Vallittu PK. Preparation of antibacterial and radio-opaque dental resin with new polymerizable quaternary ammonium monomer. Dent Mater 2015; 31:575-82. [PMID: 25743040 DOI: 10.1016/j.dental.2015.02.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 12/03/2014] [Accepted: 02/10/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVE A new polymerizable quaternary ammonium monomer (IPhene) with iodine anion was synthesized and incorporated into Bis-GMA/TEGDMA (50/50, wt/wt) to prepare antibacterial and radio-opaque dental resin. METHODS IPhene was synthesized through a 2-steps reaction route, and its structure was confirmed by FT-IR and (1)H-NMR spectra. IPhene was incorporated into Bis-GMA/TEGDMA (50/50, wt/wt) with a series of mass fraction (from 10 wt.% to 40 wt.%). Degree of monomer conversion (DC) was determined by FT-IR analysis. Polymerization shrinkage was determined according to the variation of density before and after polymerization. The flexural strength, modulus of elasticity, and fracture energy were measured using a three-point bending set up. Radiograph was taken to evaluate the radio-opacity of the polymer. A single-species biofilm model with Streptococcus mutans (S. mutans) as the tests organism was used to evaluate the antibacterial activity of the polymer. Bis-GMA/TEGDMA resin system without IPhene was used as a control group. RESULTS FT-IR and (1)H-NMR spectra of IPhene revealed that IPhene was the same as the designed structure. ANOVA analysis showed that when mass fraction of IPhene was more than 10 wt.%, the obtained resin formulation had lower DC, polymerization shrinkage, FS, and FM than control resin (p<0.05). Polymers with 20 wt.% and 30 wt.% IPhene had higher fracture energies than control polymer (p<0.05). IPhene containing samples had higher radio-opacity than control group (p<0.05), and radio-opacity of IPhene containing sample increased with the increasing of IPhene mass fraction (p<0.05). Only polymers with 30 wt.% and 40 wt.% of IPhene showed antibacterial activity (p<0.05). SIGNIFICANCE IPhene could endow dental resin with both antibacterial and radio-opaque activity when IPhene reached 30 wt.% or more. Though sample with 30 wt.% of IPhene had lower FS and FM than control group, its lower volumetric shrinkage, higher fracture energy, higher radio-opacity, and antibacterial activity still made it having potential to be used in dentistry.
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Affiliation(s)
- Jingwei He
- Department of Biomaterials Science, Institute of Dentistry and Biocity Turku Biomaterial Research Program, University of Turku, Lemminkäisenkatu 2, Turku 20520, Finland; Turku Clinical Biomaterials Centre-TCBC, University of Turku, Itäinen Pitkäkatu 4 B, Turku FI-20520, Finland; College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Eva Söderling
- Institute of Dentistry, University of Turku, Turku 20520, Finland
| | - Lippo V J Lassila
- Department of Biomaterials Science, Institute of Dentistry and Biocity Turku Biomaterial Research Program, University of Turku, Lemminkäisenkatu 2, Turku 20520, Finland; Turku Clinical Biomaterials Centre-TCBC, University of Turku, Itäinen Pitkäkatu 4 B, Turku FI-20520, Finland; Institute of Dentistry, University of Turku, Turku 20520, Finland
| | - Pekka K Vallittu
- Department of Biomaterials Science, Institute of Dentistry and Biocity Turku Biomaterial Research Program, University of Turku, Lemminkäisenkatu 2, Turku 20520, Finland; Turku Clinical Biomaterials Centre-TCBC, University of Turku, Itäinen Pitkäkatu 4 B, Turku FI-20520, Finland; Institute of Dentistry, University of Turku, Turku 20520, Finland; City of Turku Welfare Division, Oral Health Care, Turku 20101, Finland
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He J, Söderling E, Lassila LVJ, Vallittu PK. Synthesis of antibacterial and radio-opaque dimethacrylate monomers and their potential application in dental resin. Dent Mater 2014; 30:968-76. [PMID: 24938926 DOI: 10.1016/j.dental.2014.05.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 07/22/2013] [Accepted: 05/21/2014] [Indexed: 01/31/2023]
Abstract
OBJECTIVE In this study, three dimethacrylate quaternary ammonium compounds N,N-bis[2-(3-(methacryloyloxy)propanamido)ethyl]-N-methyldodecyl ammonium iodide (QADMAI-12), N,N-bis[2-(3-(methacryloyloxy)propanamido)ethyl]-N-methylhexadecyl-ammonium iodide (QADMAI-16), and N,N-bis[2-(3-(methacryloyloxy)propanamido)ethyl]-N-methyloctadectyl ammonium iodide (QADMAI-18) were synthesized and proposed to be used as antibacterial and radio-opaque agents in dental resin. METHODS All QADMAIs were synthesized through a 2-steps reaction route, and their structures were confirmed by FT-IR and 1H NMR spectra. Antibacterial activities against Streptococcus mutans (S. mutans) of QADMAIs were measured by agar diffusion test. Each QADMAI was mixed with TEGDMA (50/50, w/w) and photoinitiation system (0.7 wt% of CQ and 0.7 wt% of DMAEMA) to form resin system. Degree of monomer conversion (DC) was determined by FT-IR analysis. The flexural strength (FS) and modulus (FM) of the polymer were measured using a three-point bending set up. Radiograph was taken to determine the radio-opacity of the polymer, and aluminum step-wedge (0.5-4 mm) was used as calibration standard. Surface charge density was measured using fluorescein binding. A single-species biofilm model with S. mutans as the tests organism was used to evaluate the antibacterial property of the polymer. Bis-GMA/TEGDMA resin system was used as control material in all of the tests. RESULTS FT-IR and 1H NMR spectra showed that the structures of QADMAIs were the same as designed. ANOVA analysis revealed that antibacterial activity of QADMAI decreased with the increasing of alkyl chain length (p<0.05). QADMAI containing polymers had higher DC (p<0.05) but lower FS and FM (p<0.05) than control polymer. Alkyl chain length had no influence on DC (p>0.05), but FS and FM of QADMAI-12 containing polymer were better than those of QADMAI-16 and QADMAI-18 containing polymers (p<0.05). QADMAI containing polymers had much better radio-opacity than control polymer (p<0.05), and the radio-opacity of polymer decreased with the increasing of alkyl chain length (p<0.05). All of QADMAIs containing polymers had higher surface charge density than control polymer (p<0.05), and surface charge densities of QADMAI-12 and QADMAI-16 containing polymers were nearly the same (p>0.05) which were higher than that of QADMAI-18 containing polymer (p<0.05). All of QADMAI containing polymers had good inhibitory effect on biofilm formation. SIGNIFICANCE QADMAIs had no miscibility problem with TEGDMA, and QADMAIs could endow dental resin with both antibacterial activity and radio-opacity. Formulation of QADMAI containing resin should be optimized in terms of mechanical stregth to satisfy the requirements of dental resin for clinical application.
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Affiliation(s)
- Jingwei He
- Department of Biomaterials Science, Institute of Dentistry and Biocity Turku Biomaterial Research Program, University of Turku, Turku 20520, Finland; Turku Clinical Biomaterials Centre-TCBC, University of Turku, Turku 20520, Finland; College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Eva Söderling
- Institute of Dentistry, University of Turku, Turku 20520, Finland
| | - Lippo V J Lassila
- Turku Clinical Biomaterials Centre-TCBC, University of Turku, Turku 20520, Finland; College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; Institute of Dentistry, University of Turku, Turku 20520, Finland
| | - Pekka K Vallittu
- Turku Clinical Biomaterials Centre-TCBC, University of Turku, Turku 20520, Finland; College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China; Institute of Dentistry, University of Turku, Turku 20520, Finland
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Liang X, Söderling E, Liu F, He J, Lassila LVJ, Vallittu PK. Optimizing the concentration of quaternary ammonium dimethacrylate monomer in bis-GMA/TEGDMA dental resin system for antibacterial activity and mechanical properties. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:1387-1393. [PMID: 24449028 DOI: 10.1007/s10856-014-5156-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 01/12/2014] [Indexed: 06/03/2023]
Abstract
Four novel quaternary ammonium dimethacrylate monomers named IMQ (side alkyl chain length from 12 to 18) were synthesized with the aim to synthesize dental resin with antibacterial activity. All of IMQs were added into bis-GMA/TEGDMA dental resin system with a series of mass ratio (5, 10, and 20 wt%), double bond conversion (DC), flexural strength (FS), modulus of elasticity (FM) and biofilm formation inhibitory effect were studied. According to the results of DC, FS, FM, and the biofilm inhibitory effect, IMQ-16 containing polymer had the best comprehensive properties, and the optimal concentration of IMQ-16 in bis-GMA/TEGDMA dental resin would be in the range of 5-10 wt%.
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Affiliation(s)
- Xiaoxu Liang
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
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Choi SH, Kang DY, Hwang CJ. Surface roughness of three types of modern plastic bracket slot floors and frictional resistance. Angle Orthod 2013; 84:177-83. [PMID: 23767940 DOI: 10.2319/030313-179.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To quantitatively analyze the surface roughness of the slot floors of three types of modern plastic brackets and to measure static frictional force during sliding mechanics in vitro. MATERIALS AND METHODS Control groups comprised stainless steel brackets and monocrystalline ceramic brackets. Test groups comprised three types of 0.022-in slot, Roth prescription, plastic, maxillary right central incisor brackets. Test groups included glass fiber-reinforced polycarbonate, filler-reinforced polycarbonate, and hybrid polymer with inserted metal slot brackets. The static frictional resistance caused by sliding movements with an archwire (stainless steel) in vitro was quantitatively analyzed. Both scanning electron microscope and three-dimensional optical surface profiling were used. RESULTS Scanning electron microscope and three-dimensional optical surface profiler revealed that all as-received brackets had irregular slot floor surfaces, and both irregularity and roughness increased after the archwire sliding test. The ceramic brackets in the control group showed significantly lower surface roughness values and higher frictional values during the archwire sliding test compared with the other brackets. The glass or filler-reinforced plastic brackets exhibited significantly higher static frictional values than the metallic slot type brackets (P < .001). The hybrid polymer with inserted metal slot brackets showed relatively lower surface roughness and frictional values compared with the stainless steel control bracket. CONCLUSION Glass or filler-reinforced plastic brackets showed higher frictional resistance than metallic slot-type brackets. A plastic bracket with inserted metal slot may be the best choice among plastic brackets for low frictional resistance and to avoid damage from sliding movements of the archwire.
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Affiliation(s)
- Sung-Hwan Choi
- a Postgraduate student, Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, Korea
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He J, Söderling E, Vallittu PK, Lassila LVJ. Preparation and evaluation of dental resin with antibacterial and radio-opaque functions. Int J Mol Sci 2013; 14:5445-60. [PMID: 23470923 PMCID: PMC3634471 DOI: 10.3390/ijms14035445] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 02/26/2013] [Accepted: 03/04/2013] [Indexed: 11/16/2022] Open
Abstract
In order to prepare antibacterial and radio-opaque dental resin, a methacrylate monomer named 2-Dimethyl-2-dodecyl-1-methacryloxyethyl ammonium iodine (DDMAI) with both antibacterial and radio-opaque activities was added into a 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropyl)-phenyl]propane (Bis-GMA)/methyl methacrylate (MMA) dental resin system. Degree of conversion (DC), flexural strength (FS) and modulus (FM), water sorption (WS) and solubility (WSL), antibacterial activity, and radio-opacity (ROX) of the obtained dental resin system were investigated. Bis-GMA/MMA resin system without DDMAI was used as a control. The results showed that DDMAI could endow BIS-GMA/MMA resin system with good antibacterial (p < 0.05) and radio-opaque function without influencing the DC (p > 0.05). However, incorporating DDMAI into Bis-GMA/MMA resin could reduce mechanical properties (p < 0.05) and increase WS and WSL (p < 0.05), thus further work is needed in order to optimize the resin formulation.
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Affiliation(s)
- Jingwei He
- Department of Biomaterials Science, Institute of Dentistry and BioCity Turku Biomaterial Research Program, University of Turku, Turku 20520, Finland; E-Mails: (P.K.V.); (L.V.J.L.)
- Turku Clinical Biomaterials Centre-TCBC, University of Turku, Turku 20520, Finland
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Eva Söderling
- Institute of Dentistry, University of Turku, Turku 20520, Finland; E-Mail:
| | - Pekka K. Vallittu
- Department of Biomaterials Science, Institute of Dentistry and BioCity Turku Biomaterial Research Program, University of Turku, Turku 20520, Finland; E-Mails: (P.K.V.); (L.V.J.L.)
- Turku Clinical Biomaterials Centre-TCBC, University of Turku, Turku 20520, Finland
- Institute of Dentistry, University of Turku, Turku 20520, Finland; E-Mail:
| | - Lippo V. J. Lassila
- Department of Biomaterials Science, Institute of Dentistry and BioCity Turku Biomaterial Research Program, University of Turku, Turku 20520, Finland; E-Mails: (P.K.V.); (L.V.J.L.)
- Turku Clinical Biomaterials Centre-TCBC, University of Turku, Turku 20520, Finland
- Institute of Dentistry, University of Turku, Turku 20520, Finland; E-Mail:
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He J, Söderling E, Vallittu PK, Lassila LV. Investigation of double bond conversion, mechanical properties, and antibacterial activity of dental resins with different alkyl chain length quaternary ammonium methacrylate monomers (QAM). JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 24:565-73. [DOI: 10.1080/09205063.2012.699709] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jingwei He
- a Department of Biomaterials Science, Institute of Dentistry and Biocity Turku Biomaterial Research Program , University of Turku , Turku , 20520 , Finland
- b Turku Clinical Biomaterials Centre-TCBC , University of Turku , Turku , 20520 , Finland
- c College of Materials Science and Engineering , South China University of Technology , Guangzhou , 510641 , China
| | - Eva Söderling
- d Institute of Dentistry , University of Turku , Turku , 20520 , Finland
| | - Pekka K. Vallittu
- a Department of Biomaterials Science, Institute of Dentistry and Biocity Turku Biomaterial Research Program , University of Turku , Turku , 20520 , Finland
- b Turku Clinical Biomaterials Centre-TCBC , University of Turku , Turku , 20520 , Finland
| | - Lippo V.J. Lassila
- a Department of Biomaterials Science, Institute of Dentistry and Biocity Turku Biomaterial Research Program , University of Turku , Turku , 20520 , Finland
- b Turku Clinical Biomaterials Centre-TCBC , University of Turku , Turku , 20520 , Finland
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He J, Söderling E, Lassila LV, Vallittu PK. Incorporation of an antibacterial and radiopaque monomer in to dental resin system. Dent Mater 2012; 28:e110-7. [DOI: 10.1016/j.dental.2012.04.026] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 04/05/2012] [Accepted: 04/16/2012] [Indexed: 11/27/2022]
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Garoushi S, Tanner J, Vallittu P, Lassila L. Preliminary clinical evaluation of short fiber-reinforced composite resin in posterior teeth: 12-months report. Open Dent J 2012; 6:41-5. [PMID: 22408696 PMCID: PMC3282891 DOI: 10.2174/1874210601206010041] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2011] [Revised: 12/30/2011] [Accepted: 12/30/2011] [Indexed: 11/22/2022] Open
Abstract
This preliminary clinical trial evaluated 12 month clinical performance of novel filling composite resin system which combines short fiber-reinforced composite resin and conventional particulate filler composite resin in high stress bearing applications. A total of 37 class I and II restorations (compound and complex type) were placed in 6 premolars and 31 molars. The restorations were reviewed clinically at 6 months (baseline) and 12 months using modified USPHS codes change criteria for marginal adaptation, post-operative sensitivity, pulpal pain and secondary caries criteria. Photographs and x-rays were obtained for restorative analysis. Results of 12 months evaluation showed 5 restorations having little marginal leakage (B score) and 1 patient had minor pulpal symptom and post-operative sensitivity (B score). No secondary caries or bulk fracture was detected. The majority of restorations exhibited A scores of the evaluated criteria. After 12 months, restorations combining base of short fiber reinforced composite resin as substructure and surface layer of hybrid composite resin displayed promising performance in high load bearing areas.
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Affiliation(s)
- S Garoushi
- Department of Biomaterials Science, Institute of Dentistry, University of Turku, Turku, Finland
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25
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Comparative study on the microbial adhesion to preveneered and stainless steel crowns. Indian J Dent 2011. [DOI: 10.1016/s0975-962x(11)60031-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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