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Kim MJ, Mangal U, Seo JY, Kim JY, Kim JY, Ryu JH, Kim HJ, Lee KJ, Kwon JS, Choi SH. A novel zwitterion incorporated Nano-crystalline ceramic and polymer for bacterial resistant dental CAD-CAM block. J Dent 2024; 148:105054. [PMID: 38796091 DOI: 10.1016/j.jdent.2024.105054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/02/2024] [Accepted: 05/06/2024] [Indexed: 05/28/2024] Open
Abstract
OBJECTIVES To create bacteria-resistant dental CAD-CAM blocks with a biofilm-resistant effect by incorporating Nano-crystalline ceramic and polymer (NCP) with 2-methacryloyloxyethyl phosphorylcholine (MPC) and sulfobetaine methacrylate (SBMA) and at an equimolar ratio, referred to as MS. METHODS Experimental groups comprised NCP blocks containing zwitterions at 0.15wt% (MS015) and 0.45wt% (MS045). NCP blocks without MS served as control (CTRL). Flexural strength, surface hardness, water sorption and solubility, photometric properties, and cytotoxicity were assessed for all samples. Additionally, the resistance to single and multi-species bacterial adhesion was investigated. RESULTS MS045 showed significant reduction in flexural strength (P < 0.01) compared to both CTRL and MS015. Both MS015 and MS045 showed significantly increased water sorption and significant reduction in water solubility compared to CTRL. Light transmission remained consistent across all MS content levels, but the irradiance value decreased by 12 % in the MS045 group compared to the MS015 group. Notably, compared to the CTRL group, the MS015 group exhibited enhanced resistance to adhesion by Porphyromonas gingivalis and a multi-species salivary biofilm, with biofilm thickness and biomass reduced by 45 % and 56 %, respectively. CONCLUSIONS NCP containing 0.15 % MS can effectively reduce adhesion of multiple species of bacteria while maintaining physical and mechanical properties. CLINICAL SIGNIFICANCE NCP integrating zwitterions is clinically advantageous in resisting bacterial adhesion at internal and external margins of milled indirect restoration.
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Affiliation(s)
- Min-Ji Kim
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Yonsei University College of Dentistry, 50-1 Yonsei-Ro, Seodaemun-Gu, Seoul, 03722, Republic of Korea; Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Republic of Korea; BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Utkarsh Mangal
- BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Ji-Young Seo
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Ji-Yun Kim
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Ji-Yeong Kim
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Jeong-Hyun Ryu
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Hee-Jin Kim
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Yonsei University College of Dentistry, 50-1 Yonsei-Ro, Seodaemun-Gu, Seoul, 03722, Republic of Korea; BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Kee-Joon Lee
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Jae-Sung Kwon
- BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea; Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul, Republic of Korea.
| | - Sung-Hwan Choi
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Republic of Korea.
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Chen X, Song J, Sun J, Zhang J, Chen X, Zeng C, Hu J, Chang X, Jin F, Luo S, Chen Z, Luo Y. Hepatitis B infection is associated with periodontitis: the national health and nutrition examination survey (2009-2014). BMC Oral Health 2024; 24:815. [PMID: 39020311 PMCID: PMC11256453 DOI: 10.1186/s12903-024-04489-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 06/17/2024] [Indexed: 07/19/2024] Open
Abstract
BACKGROUND Current research has been inconclusive regarding whether hepatitis B infection is associated with an increased risk of periodontitis. This study aims to test the null hypothesis that no association exists between hepatitis B infection and an increased risk of periodontitis using the National Health and Nutrition Examination Survey (2009-2014). METHODS We performed a cross-sectional study using the National Health and Nutrition Examination Survey (NHANES) database (2009-2014) to assess the rate of the prevalence of periodontitis in patients with and without hepatitis B infection. Participants who had tested for hepatitis B and periodontitis were included. The included participants were divided into no/mild periodontitis and moderate/severe periodontitis groups according to their periodontal status. The association between hepatitis B infection and chronic periodontitis was evaluated by multivariable regression analyses adjusting for age, gender, race/ethnicity, education level, income-to-poverty ratio, smoking, alcohol, BMI, ALT, AST, creatinine, hypertension, and diabetes. RESULTS A total of 5957 participants were included and divided into two groups: inactive periodontitis group (n = 3444) and active periodontitis group (n = 2513). The results showed that participants with hepatitis B had a higher risk of periodontitis. After adjusting for covariables, adults with hepatitis B infection were 38% more likely to have periodontitis compared to those without hepatitis B infection (95% Confidence Interval [CI]:1.085-1.754). CONCLUSIONS In general, the results suggest that CHB is positively associated with the more severe periodontitis. These results suggest that people with hepatitis B infection should take good periodontal care measures to avoid the occurrence and development of periodontitis.
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Affiliation(s)
- XianRun Chen
- School of Stomatology, Zunyi Medical University, Zunyi, China
- Department of Prosthodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - Jukun Song
- Department of Oral and Maxillofacial Surgery, The Affiliated Stomatological Hospital of Guizhou Medical University, Guiyang, China
| | - JiangLing Sun
- Department of Endodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - JiQin Zhang
- School of Stomatology, Zunyi Medical University, Zunyi, China
- Department of Prosthodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - XingJin Chen
- School of Stomatology, Zunyi Medical University, Zunyi, China
- Department of Endodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - ChongWen Zeng
- School of Stomatology, Zunyi Medical University, Zunyi, China
- Department of Endodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - JiaXin Hu
- School of Stomatology, Zunyi Medical University, Zunyi, China
- Department of Prosthodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - XingTao Chang
- School of Stomatology, Zunyi Medical University, Zunyi, China
- Department of Prosthodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - FuQian Jin
- Department of Endodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - SiYang Luo
- Department of Prosthodontics, Guiyang Stomatological Hospital, Guiyang, China
| | - Zhu Chen
- School of Stomatology, Zunyi Medical University, Zunyi, China.
- Department of Endodontics, Guiyang Stomatological Hospital, Guiyang, China.
| | - Yi Luo
- School of Stomatology, Zunyi Medical University, Zunyi, China.
- Department of Prosthodontics, Guiyang Stomatological Hospital, Guiyang, China.
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Al-Johani H, Haider J, Silikas N, Satterthwaite J. Effect of repeated firing on the topographical, optical, and mechanical properties of fully crystallized lithium silicate-based ceramics. J Prosthet Dent 2024; 131:741.e1-741.e11. [PMID: 38242762 DOI: 10.1016/j.prosdent.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 01/02/2024] [Accepted: 01/05/2024] [Indexed: 01/21/2024]
Abstract
STATEMENT OF PROBLEM The influence of different firing protocols on the topographical, optical, and mechanical properties of fully crystallized computer-aided design and computer-aided manufacturing (CAD-CAM) lithium silicate-based glass-ceramics (LSCs) for dental restorations remains unclear. PURPOSE The purpose of this in vitro study was to investigate the effect of different firing regimens on the surface roughness, gloss, Martens hardness, indentation modulus, biaxial flexural strength, and crystalline structure of fully crystallized CAD-CAM LSCs and the effect of their interposition on the irradiance of a light-polymerization unit. MATERIAL AND METHODS Three fully crystallized CAD-CAM LSC blocks were evaluated (N=150): lithium disilicate (Initial LiSi Blocks; LS), zirconia-reinforced silicate (Celtra Duo; CD), and lithium aluminum disilicate (CEREC Tessera; CT). Specimens were allocated to 5 subgroups according to their firing protocol. LSC roughness (Sa) was measured with an optical profilometer, and gloss (GU) was detected with a gloss meter. Martens hardness (HM) and indentation modulus (EIT) data were obtained from a hardness testing machine. The irradiance of a light-polymerization unit and transmittance of LSCs were measured with an instrument (Managing Accurate Resin Curing-Light Collector; BlueLight analytics, Inc) subsequent to ceramic interposition. Crystalline phases were analyzed by X-ray diffraction, and biaxial flexural strength (σ) was determined by the ball-on-3-ball method in a universal testing machine followed by Weibull analysis to calculate characteristic strength (σ0) and Weibull modulus (m). Two-way ANOVA and Tukey HSD post hoc tests (α=.05) were used to analyze the data. RESULTS Statistically significant differences were found among different treatment groups based on Sa, GU, HM, and EIT values (P<.001). Delivered irradiance was significantly reduced following CT (P<.01) and glazed LSC (P<.005) interposition. CD displayed highest biaxial flexural strength and reliability after 1 firing cycle (σ=568.2 MPa, m=16.8) CONCLUSIONS: The type of material and firing regimens had a significant effect on the topographical, optical, and mechanical properties of fully crystallized CAD-CAM LSCs. Glazing significantly reduced delivered irradiance, Martens hardness, and biaxial flexural strength.
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Affiliation(s)
- Hanan Al-Johani
- PhD student, Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester, England, UK
| | - Julfikar Haider
- Associate Professor, Department of Engineering, Manchester Metropolitan University, Manchester, England, UK
| | - Nick Silikas
- Full Professor, Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester, England, UK.
| | - Julian Satterthwaite
- Full Professor, Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester, England, UK
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Benalcazar-Jalkh EB, Cunha VS, Bergamo ETP, Alves LMM, de Monteiro-Sousa RS, Campos TMB, Tanaka R, Marcolino GDA, Souza FMD, Bonfante EA. Finishing technique effect on strength of zirconia-reinforced lithium silicate ceramic. Eur J Oral Sci 2024; 132:e12964. [PMID: 38062529 DOI: 10.1111/eos.12964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 11/14/2023] [Indexed: 01/25/2024]
Abstract
The aim of this study was to evaluate the effect of two finishing techniques, glazing or polishing, in comparison with the as-cut condition, on the biaxial-flexural-strength (BFS) of a zirconia-reinforced lithium silicate ceramic (ZLS). Cylinders were milled from CAD/CAM blocks and sliced to obtain disc-shaped specimens (ISO6872:2015). Polished and glazed specimens were processed following the manufacturer's instructions. Thirty-three specimens were obtained for each condition and microstructural and BFS/fractographic characterizations were performed. BFS and roughness data were analyzed using Weibull statistics and ANOVA one-way with Tukey post-hoc test, respectively. While a rougher surface was observed for as-cut specimens, smoother surfaces were observed for polished and glazed ZLS at microscopical evaluation and confirmed through surface-roughness evaluation. X-ray spectra depicted a glass phase for all groups and characteristic metasilicate, lithium disilicate, and lithium phosphate peaks for the as-cut and polished specimens. Glazed specimens showed higher characteristic strength than polished and as-cut specimens, which did not differ significantly. While higher Weibull-modulus was observed for the polished than for the as-cut specimens, no statistically significant differences were noted between glazed and polished, and between glazed and as-cut specimens. ZLS presents higher strength when glazed, and polishing increases the structural reliability of the material relative to the as-cut condition. Both finishing techniques reduced surface roughness similarly.
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Affiliation(s)
| | - Verena Souza Cunha
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | - Edmara Tatiely Pedroso Bergamo
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
- Biomaterials Division, NYU Dentistry, New York, USA
- Department of Prosthodontics, NYU Dentistry, New York, USA
| | - Larissa Marcia Martins Alves
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | | | - Tiago Moreira Bastos Campos
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | | | - Giovana de Assis Marcolino
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | - Felipe Machado de Souza
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | - Estevam Augusto Bonfante
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
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Pereira RM, Moreira Bastos Campos T, Augusto Bonfante E, Patrocínio Thim G. A comparative study of mechanical properties of yttria stabilized zirconia monolithic and bilayer configuration for dental application. J Mech Behav Biomed Mater 2023; 148:106160. [PMID: 37832171 DOI: 10.1016/j.jmbbm.2023.106160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 09/28/2023] [Accepted: 09/30/2023] [Indexed: 10/15/2023]
Abstract
Zirconia multilayer presents promising prospects, but there is scarce information about its microstructural and mechanical characterization. Therefore, this study sought to produce them in-house and to perform their characterization by comprising four groups of specimens to assess the biaxial flexural strength, microhardness, fracture toughness, phase characterization and quantification, fractography, and microstructural features. Weibull analysis was performed to determine the Weibull modulus and characteristic strength. The results showed that bilayers 3YSZ and 5YSZ presented intermediate mechanical properties when compared to 3YSZ and 5YSZ monolithic controls (680 MPa, 464 MPa, 885 MPa, 594 MPa, respectively). Fractographic analysis revealed that the failure origin was not at the interface in the bilayer groups, but residual stress was present between the layers. Hardness and fracture toughness were not affected by the interface.
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Affiliation(s)
- Raíssa Monteiro Pereira
- Laboratory of Plasma and Process, Technological Institute of Aeronautics, Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP, 12228-900, Brazil.
| | - Tiago Moreira Bastos Campos
- Laboratory of Plasma and Process, Technological Institute of Aeronautics, Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP, 12228-900, Brazil
| | - Estevam Augusto Bonfante
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry - University of São Paulo, Bauru, SP, Brazil
| | - Gilmar Patrocínio Thim
- Laboratory of Plasma and Process, Technological Institute of Aeronautics, Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP, 12228-900, Brazil
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Sağlam G, Cengiz S, Köroğlu A, Şahin O, Velioğlu N. Comparison of the Micro-Shear Bond Strength of Resin Cements to CAD/CAM Glass Ceramics with Various Surface Treatments. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2635. [PMID: 37048927 PMCID: PMC10095943 DOI: 10.3390/ma16072635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/15/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
This study aimed to compare the effect of acid etching, sandblasting, or silica coating on the micro-shear bond strength of dual-cured resin cements to computer-aided design and computer-aided manufacturing (CAD/CAM) glass ceramic materials. Feldspathic, lithium disilicate, and zirconia-reinforced CAD/CAM ceramics were divided into four groups: control group (C), no surface treatment; hydrofluoric (HF) group, 5% HF acid-etched; sandblasting (SB) group, abraded with 50 µm aluminum oxide (Al2O3) particles; silica-coated (CJ) group, abraded with 30 µm silica-modified Al2O3 particles. Roughness values were obtained by using a profilometer. The cements were condensed on the surface-treated specimens and a micro-shear bond test was conducted. The ceramic material (p < 0.001) and surface treatment type (p < 0.001) significantly affected the micro-shear bond strength values. HF acid etching can be recommended for the surface pretreatment of feldspathic, lithium disilicate, and zirconia-reinforced CAD/CAM ceramics. Better bond strengths can be obtained with HF acid etching than with sandblasting and silica coating.
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Affiliation(s)
- Gaye Sağlam
- Department of Prosthodontics, Faculty of Dentistry, Zonguldak Bülent Ecevit University, Zonguldak 67600, Turkey
| | - Seda Cengiz
- Department of Prosthodontics, Faculty of Dentistry, Zonguldak Bülent Ecevit University, Zonguldak 67600, Turkey
| | - Ayşegül Köroğlu
- Department of Prosthodontics, Faculty of Dentistry, Zonguldak Bülent Ecevit University, Zonguldak 67600, Turkey
| | - Onur Şahin
- Department of Prosthodontics, DCT Clinic, Antalya 07000, Turkey
| | - Neslin Velioğlu
- Department of Prosthodontics, Navadent Oral and Dental Health Policlinic, Zonguldak 67000, Turkey
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7
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PEREIRA RM, RIBAS RG, MONTANHEIRO TLDA, SCHATKOSKI VM, RODRIGUES KF, KITO LT, KOBO LK, CAMPOS TMB, BONFANTE EA, GIERTHMUEHLEN PC, SPITZNAGEL FA, THIM GP. An engineering perspective of ceramics applied in dental reconstructions. J Appl Oral Sci 2023; 31:e20220421. [PMID: 36820784 PMCID: PMC9972857 DOI: 10.1590/1678-7757-2022-0421] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 01/04/2023] [Indexed: 02/22/2023] Open
Abstract
The demands for dental materials continue to grow, driven by the desire to reach a better performance than currently achieved by the available materials. In the dental restorative ceramic field, the structures evolved from the metal-ceramic systems to highly translucent multilayered zirconia, aiming not only for tailored mechanical properties but also for the aesthetics to mimic natural teeth. Ceramics are widely used in prosthetic dentistry due to their attractive clinical properties, including high strength, biocompatibility, chemical stability, and a good combination of optical properties. Metal-ceramics type has always been the golden standard of dental reconstruction. However, this system lacks aesthetic aspects. For this reason, efforts are made to develop materials that met both the mechanical features necessary for the safe performance of the restoration as well as the aesthetic aspects, aiming for a beautiful smile. In this field, glass and high-strength core ceramics have been highly investigated for applications in dental restoration due to their excellent combination of mechanical properties and translucency. However, since these are recent materials when compared with the metal-ceramic system, many studies are still required to guarantee the quality and longevity of these systems. Therefore, a background on available dental materials properties is a starting point to provoke a discussion on the development of potential alternatives to rehabilitate lost hard and soft tissue structures with ceramic-based tooth and implant-supported reconstructions. This review aims to bring the most recent materials research of the two major categories of ceramic restorations: ceramic-metal system and all-ceramic restorations. The practical aspects are herein presented regarding the evolution and development of materials, technologies applications, strength, color, and aesthetics. A trend was observed to use high-strength core ceramics type due to their ability to be manufactured by CAD/CAM technology. In addition, the impacts of COVID-19 on the market of dental restorative ceramics are presented.
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Affiliation(s)
- Raíssa Monteiro PEREIRA
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Renata Guimarães RIBAS
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Thaís Larissa do Amaral MONTANHEIRO
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Vanessa Modelski SCHATKOSKI
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Karla Faquine RODRIGUES
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Letícia Terumi KITO
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Lucas Kazunori KOBO
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Tiago Moreira Bastos CAMPOS
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Estevam Augusto BONFANTE
- Universidade de São PauloFaculdade de Odontologia de BauruDepartamento de Prótese e PeriodontiaBauruSPBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil.
| | - Petra Christine GIERTHMUEHLEN
- Heinrich-Heine-UniversityMedical FacultyUniversity Hospital DüsseldorfDüsseldorfGermanyHeinrich-Heine-University, Medical Faculty and University Hospital Düsseldorf, Düsseldorf, Department of Prosthodontics, Germany.
| | - Frank Akito SPITZNAGEL
- Heinrich-Heine-UniversityMedical FacultyUniversity Hospital DüsseldorfDüsseldorfGermanyHeinrich-Heine-University, Medical Faculty and University Hospital Düsseldorf, Düsseldorf, Department of Prosthodontics, Germany.
| | - Gilmar Patrocínio THIM
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
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8
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Bonfante EA, Calamita M, Bergamo ETP. Indirect restorative systems-A narrative review. J ESTHET RESTOR DENT 2023; 35:84-104. [PMID: 36688803 DOI: 10.1111/jerd.13016] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/24/2023]
Abstract
OBJECTIVE The background and clinical understanding of the properties of currently available indirect restorative systems and fabrication methods is, along with manufacturer and evidence-based literature, an important starting point to guide the clinical selection of materials for tooth and/or implant supported reconstructions. Therefore, this review explores most indirect restorative systems available in the market, especially all-ceramic, along with aspects of manufacturing process, clinical survival rates, and esthetic outcomes. OVERVIEW Progressive incorporation of new technologies in the dental field and advancements in materials science have enabled the development/improvement of indirect restorative systems and treatment concepts in oral rehabilitation, resulting in reliable and predictable workflows and successful esthetic and functional outcomes. Indirect restorative systems have evolved from metal ceramics and polymers to glass ceramics, polycrystalline ceramics, and resin-matrix ceramics, aiming to improve not only biological and mechanical properties, but especially the optical properties and esthetic quality of the reconstructions, in attempt to mimic natural teeth. CONCLUSIONS Based on several clinical research, materials, and patient-related parameters, a decision tree for the selection of indirect restorative materials was suggested to guide clinicians in the rehabilitation process. CLINICAL SIGNIFICANCE The pace of materials development is faster than that of clinical research aimed to support their use. Since no single material provides an ideal solution to every case, professionals must continuously seek information from well designed, long-term clinical trials in order to incorporate or not new materials and technological advancements.
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Affiliation(s)
- Estevam A Bonfante
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry - University of São Paulo, Bauru, SP, Brazil
| | - Marcelo Calamita
- Department of Restorative Dental Sciences at the University of Florida, Gainesville, Florida, USA
| | - Edmara T P Bergamo
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry - University of São Paulo, Bauru, SP, Brazil
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9
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Jin F, Song J, Luo Y, Wang B, Ding M, Hu J, Chen Z. Association between skull bone mineral density and periodontitis: Using the National Health and Nutrition Examination Survey (2011-2014). PLoS One 2022; 17:e0271475. [PMID: 36584175 PMCID: PMC9803209 DOI: 10.1371/journal.pone.0271475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 12/03/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Bone mineral density (BMD) and periodontitis have been the subject of many studies. However, the relationship between skull (including mandible) BMD and periodontitis has not been extensively studied. An objective of this cross-sectional study was to examine the relationship between skull BMD and periodontitis using data from the National Health and Nutrition Examination Surveys (NHANES) for 2011-2012 and 2013-2014. MATERIALS AND METHODS From NHANES 2011-2014, 3802 participants aged 30-59 were selected. We divided the skull BMD level into quartiles to check the distribution of variables. Periodontitis was defined by the Centers for Disease Control and Prevention (CDC) and the American Association of Periodontology (AAP) in 2012. Multivariate logical regression analysis was used to explore the independent relationship between skull BMD and periodontitis. The generalized additive model (GAM), smooth curve fitting (penalty spline) and threshold effect analysis was used to evaluate dose-response relationship between skull BMD and periodontitis and the potential nonlinear relationship between skull BMD and periodontitis. Finally, subgroup analysis and interaction test were conducted to determine the role of covariates between skull BMD and periodontitis. RESULTS The overall average skull BMD of 3802 participants was 2.24g/cm2, the average age was 43.94 years, and the prevalence of periodontitis was 41.03%. In the fully adjusted logistic regression model, skull BMD and periodontitis showed an independent negative correlation (OR 0.73, 95% CI 0.59-0.90, P = 0.0032) and a linear relationship. Compared with the lowest quartile array (Q1:1.22-1.98) of skull BMD, the highest quartile array(Q4: 2.47-3.79) had a significantly lower risk of periodontitis (OR 0.70,95% CI 0.56-0.87, P = 0.0014). Subgroup analysis showed a highly consistent negative correlation between skull BMD and periodontitis. In the interaction test, people with moderate poverty income ratio (1.57-3.62) and those who had more than 12 alcohol drinks in the past year had a lower risk of periodontitis. CONCLUSIONS This result suggested that periodontal disease can be related to low skull BMD, for those people, oral hygiene and health care should be more closely monitored. Validation of our findings will require further research.
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Affiliation(s)
- Fuqian Jin
- School of Stomatology, Zunyi Medical University, Zunyi, Guizhou, China
- Department of Oral Medicine, Guiyang Hospital of Stomatology, Guiyang, Guizhou, China
| | - Jukun Song
- The Affiliated Stomatological Hospital & Stomatology of Guizhou Medical University, Guizhou Medical University, Guiyang, China
| | - Yi Luo
- Department of Oral Medicine, Guiyang Hospital of Stomatology, Guiyang, Guizhou, China
| | - Beichuan Wang
- School of Stomatology, Zunyi Medical University, Zunyi, Guizhou, China
- Department of Oral Medicine, Guiyang Hospital of Stomatology, Guiyang, Guizhou, China
| | - Ming Ding
- School of Stomatology, Zunyi Medical University, Zunyi, Guizhou, China
- Department of Oral Medicine, Guiyang Hospital of Stomatology, Guiyang, Guizhou, China
| | - Jiaxin Hu
- School of Stomatology, Zunyi Medical University, Zunyi, Guizhou, China
- Department of Oral Medicine, Guiyang Hospital of Stomatology, Guiyang, Guizhou, China
| | - Zhu Chen
- School of Stomatology, Zunyi Medical University, Zunyi, Guizhou, China
- Department of Oral Medicine, Guiyang Hospital of Stomatology, Guiyang, Guizhou, China
- * E-mail:
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10
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Fracture toughness and brittleness of novel CAD/CAM resin composite block. Dent Mater 2022; 38:e308-e317. [DOI: 10.1016/j.dental.2022.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 10/04/2022] [Accepted: 11/11/2022] [Indexed: 11/24/2022]
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11
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Lassila L, Mangoush E, Vallittu PK, Garoushi S. Fracture behavior of discontinuous fiber-reinforced composite inlay-retained fixed partial denture before and after fatigue aging. J Prosthodont Res 2022; 67:271-277. [PMID: 35896342 DOI: 10.2186/jpr.jpr_d_22_00050] [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 To evaluate the fracture behavior of inlay-retained fixed partial dentures (IRFPDs) made of experimental short fiber-reinforced composite (SFRC) computer-aided design/computer-aided manufacturing (CAD/CAM) block before and after cyclic fatigue aging. METHODS Five groups (n=20/group) of three-unit posterior IRFPDs were fabricated. The first and second groups were CAD/CAM fabricated from experimental SFRC blocks or lithium-disilicate (IPS e.max CAD, IVOCLAR) materials, the third group comprised a three-dimensional-printed composite (Temp PRINT, GC), and the fourth and fifth groups comprised conventional laboratory flowable composite (Gradia Plus, GC) and commercial flowable SFRC (everX Flow, GC), respectively. All IRFPDs were luted into a metal jig with adhesive dual-cure resin cement (RelyX Ultimate, 3M ESPE). Half the IRFPDs per group (n=10) were subjected to fatigue aging for 10,000 cycles. The remaining half were statically loaded until fracture without fatigue aging. The load was applied vertically between triangular ridges of the buccal and lingual cusps. The fracture mode was visually examined using optical and scanning electron microscopy (SEM). Data were statistically analyzed using a two-way analysis of variance (ANOVA) followed by Tukey's HSD test. RESULTS ANOVA revealed that IRFPDs made of experimental SFRC CAD/CAM had the highest (p<0.05) load-bearing capacity before (2624±463 N) and after (2775±297 N) aging among all groups. Cyclic fatigue aging decreased the load-bearing capacity (p>0.05) of all tested prostheses, except for the experimental SFRC CAD/CAM and conventional laboratory composite IRFPDs (p>0.05). SEM images showed the ability of discontinuous short fibers in the experimental SFRC CAD/CAM composite to redirect and hinder crack propagation. CONCLUSION CAD/CAM-fabricated IRFPDs made of experimental SFRC blocks showed promising performance in clinical testing in terms of fracture behavior.
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Affiliation(s)
- Lippo Lassila
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre -TCBC Institute of Dentistry, University of Turku, Turku, Finland
| | - Enas Mangoush
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre -TCBC Institute of Dentistry, University of Turku, Turku, Finland
| | - 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, Oral Health Care, Turku, Finland
| | - Sufyan Garoushi
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre -TCBC Institute of Dentistry, University of Turku, Turku, Finland
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12
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Pinto RDAS, Castro FM, Moura DMD, de Miranda LM, Miranda JS, de Carvalho RLA, Souza RODAE, Leite FPP. Effect of different surface treatments on the micro tensile bond strength to dentin, biaxial flexural strength and roughness of CAD/CAM resin composite and polymer infiltrated ceramic. J Mech Behav Biomed Mater 2022; 131:105257. [DOI: 10.1016/j.jmbbm.2022.105257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 11/27/2022]
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Önöral Ö, Ongun S, Günal B. Evaluation of surface characterization and mechanical features of resin-matrix ceramics before and after different surface treatments. J Prosthet Dent 2022; 127:928.e1-928.e8. [PMID: 35568526 DOI: 10.1016/j.prosdent.2022.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/18/2022] [Accepted: 04/18/2022] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM Surface treatments (STs) required for micromechanical interlocking can lead to alterations in the surface characterization and mechanical features of the resin-matrix ceramics (RMCs), which may jeopardize the long-term outcome of an indirect restoration. However, evidence on this issue is lacking. PURPOSE The purpose of this in vitro study was to assess the influence of different STs on the surface roughness (SR), water contact angle (WCA), and flexural strength (FS) of RMCs. MATERIAL AND METHODS Two hundred rectangular plates (12×14×1 mm) were prepared from 5 different RMC ingots, including a polymer-infiltrated ceramic network (Vita Enamic [VE]), 2 resin nanoceramics (Lava Ultimate [LU], Grandio Blocks [GB]), a flexible nanoparticle-filled resin (GC Cerasmart [GC]), and a reinforced composite resin (Brilliant Crios [BC]). Plates of each RMC group were further divided into 4 subgroups according to the ST applied: Control, no treatment (C); airborne-particle abrasion with aluminum oxide particles (APA); 2W- and 3W-Er,Cr:YSGG laser irradiations (LI2W, LI3W) (n=10 per ST). The SR (Ra) of each plate was recorded with a contact profilometer. WCAs (θ) of distilled water on the plates were determined by using the sessile-drop method. The FS (MPa) of each plate was measured with a universal testing machine. Data acquired for SR, WCA, and FS were statistically analyzed (α=.05). Weibull statistics were also conducted to determine the reliability of each material. RESULTS The 2-way ANOVA showed that SR, WCA, and FS values were significantly influenced not only by all tested variables but also by their interaction terms (P<.001). All STs significantly increased the SR values (P<.05). Maximum and minimum SR values were recorded in GC-LI3W (7.06 ±0.16) and GC-C (0.07 ±0.02) groups. After STs, WCA values significantly diminished (P<.05). Maximum and minimum WCA values were recorded in LU-C (61.74 ±2.45) and VE-APA (40.38 ±1.56) groups. All STs significantly reduced the FS values (P<.05). The upper and lower FS bounds were 140.7 ±17.07 and 60.66 ±6.31, respectively, set by VG-C and GC-APA. Weibull distribution indicated that the untreated groups presented the highest m values. Among the treated groups, BC-LI3W demonstrated superior reliability (m=14.04). CONCLUSIONS APA for LU, LI2W for VG and BC, and LI3W for GC and VE can be preferred. Although APA increased the SR and provided more wettable surfaces, it caused considerable loss of FS. Therefore, LI can be recommended as a safer ST for RMCs.
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Affiliation(s)
- Özay Önöral
- Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Mersin, Turkey.
| | - Salim Ongun
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Mersin, Turkey
| | - Burcu Günal
- Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Mersin, Turkey
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Effect of repeated millings on the surface integrity of diamond burs and roughness of different CAD/CAM materials. Clin Oral Investig 2022; 26:5325-5337. [PMID: 35449245 DOI: 10.1007/s00784-022-04500-2] [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: 11/01/2021] [Accepted: 04/13/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES This study evaluated the surface integrity of two types of diamond burs and their effect on the roughness of different CAD/CAM materials. MATERIALS AND METHODS CAD/CAM materials, Vita Mark II (VM), IPS e.max CAD (EM), Celtra Duo (CD), G-Ceram (GC), and Lava Ultimate (LU) blocks were milled with CEREC MCXL. Five pairs of pointed cylinder burs (CB) and step burs (SB) were used repeatedly. The wear rate of burs was analyzed before and after milling with a scanning electron microscope (SEM) and weighing the burs. The milling time of the blocks at different milling stages was recorded from 2 (M2) to 8 times (M8) of use. The surface roughness (Ra) of blocks was measured with a profilometer. Data from the differences in surface roughness were analyzed using univariate analyses of variance and Kruskal-Wallis tests (alpha = 0.05). RESULTS For M2, the highest roughness (2.12 ± 0.1 μm) was observed with the VM block. EM blocks presented the highest roughness values (1.82 ± 0.3 μm, 1.85 ± 0.1 μm, and 1.86 ± 0.04 μm) at M4, M6, and M8, respectively. While the highest Ra values were observed for VM (2.12 to 1.43 µm), LU provided the lowest mean Ra (1.62 to 1.33 µm) among the tested materials. After the repeated use of burs up to 8 times, the surface roughness of all the tested materials decreased. Milling of LU resulted in chip deposits on the CB surface in SEM images. The duration of cutting was higher for CD and EM materials than those of other materials, but the milling duration for VM, GC, and LU blocks was similar. SB burs exhibited more wear than CB after repeated milling. CONCLUSIONS A repeated number of millings more than 4 times decreased the surface integrity of the milling burs, increased the surface roughness of CAD/CAM blocks except for LU, and increased the milling duration. Increased material hardness was more detrimental on bur surface integrity. CLINICAL RELEVANCE During milling CAD/CAM blocks, clinicians should note that the surface integrity of milling burs decreases after 4 times of use as a function of material hardness where step burs wear quicker than pointed cylinder burs.
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Ordoñez Balladares A, Abad-Coronel C, Ramos JC, Martín Biedma BJ. Fracture Resistance of Sintered Monolithic Zirconia Dioxide in Different Thermal Units. MATERIALS 2022; 15:ma15072478. [PMID: 35407810 PMCID: PMC8999687 DOI: 10.3390/ma15072478] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 01/27/2023]
Abstract
The purpose of this study was to compare the fracture strength of monolithic zirconium dioxide subjected to a sintering process in two different furnaces: InFire HTC Speed and CEREC SpeedFire. Methods: Forty restorations were designed and machined using a computer aided design / computer aidded machine (CAD/CAM) system. The restorations were randomly assigned to two groups of 20 samples each, Group 1 for the SpeedFire furnace (fast sintering) and Group 2 for the InFire furnace (slow sintering). Each of the crowns was subjected to a maximum compression load recorded in Newtons (N) and a displacement control with a speed of 1 mm/min. Results: Group 1 presented an average of 1222.8 N and a standard deviation of 136.91 N. Group 2 obtained a mean of 1068.5 N and a standard deviation of 316.39 N. Conclusions: There were no significant differences between the two groups, and the mechanical strength of the material was not affected, which would imply a saving of clinical and laboratory time when performing rapid sintering on monolithic translucent zirconium dioxide restorations. However, rapidly sintered restorations have limited reliability.
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Affiliation(s)
- Andrea Ordoñez Balladares
- Faculty of Dentistry, Universidad de Guayaquil, Guayaquil 090514, Ecuador;
- Faculty of Dentistry, Universidad de Santiago de Compostela, 15782 Galicia, Spain;
| | - Cristian Abad-Coronel
- Department of Digital Dentistry and CAD/CAM Materials, Faculty of Dentistry, Universidad de Cuenca, Cuenca 010107, Ecuador
- Faculty of Dentistry, Universidad San Francisco de Quito, Quito 170901, Ecuador
- Correspondence:
| | - Joao Carlos Ramos
- Faculty of Medicine, Universidad de Coimbra, 3000-370 Coimbra, Portugal;
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Mavriqi L, Valente F, Murmura G, Sinjari B, Macrì M, Trubiani O, Caputi S, Traini T. Lithium disilicate and ZLS glass-ceramics for CAD/CAM dental restorations. Biocompatibility, mechanical and microstructural properties after crystallization.: Microstructure and Properties of Glass Ceramics for CAD/CAM Applications. J Dent 2022; 119:104054. [PMID: 35122936 DOI: 10.1016/j.jdent.2022.104054] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/31/2021] [Accepted: 01/31/2022] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVES The objective of this study was to define the impact of heating rate on the crystal growth, the mechanical properties, and the biocompatibility of three different kinds of CAD/CAM glass-ceramics treated with a conventional furnace. METHODS Lithium disilicate (IPS EMax-CAD, Ivoclar Vivadent) (LS2) and two zirconia reinforced lithium silicate (ZLS) ceramics (Vita Suprinity PC, VITA Zahnfabrik; Celtra Duo, Dentsply Sirona) (ZLSS; ZLSC) were used. The mechanical properties and the crystal growth were evaluated on 42 specimens (n=14 per group). The thermal treatments recommended by the manufacturers were carried out. All groups were tested for fracture toughness (Ft) and Vickers hardness (Hv). Scanning electron microscope (SEM) images were taken after a slight surface etching with hydrofluoric acid solution (1% for 20 sec). Differential Thermal Analysis (DTA) was performed and cellular adhesion with human periodontal ligament stem cells (hPDLSCs) culture was qualitatively assayed. Data were analysed with Repeated Measurements ANOVA and ANOVA followed by Tukey post hoc test. RESULTS The crystals' mean size (±SD) after heat treatment was 1650.0 (±340.0) nm for LS2, 854.5 (±155.0) nm for ZLSS and 759.9 (±118.4) nm for ZLSC (p<0.05 among the groups). As consequence of crystallization, the Hv was 6.1±0.3 GPa for LS2, 7.6±0.7 GPa for ZLSS and 7.1±0.5 GPa for ZLSC (p<0.05 for LS2 vs ZLSS and ZLSC), while the Ft was 2.2±0.1 MPa m1/2 for LS2, 4.7±0.8 MPa m1/2 for ZLSS and 3.8±0.6 MPa m1/2 for ZLSC (p<0.05 among the groups). The DTA curves showed a crystallization process for LS2, ZLSS and ZLSC at a temperature range 810°C to 840°C. The amount of adherent hPDLSCs was superior on LS2 than on ZLS. CONCLUSIONS All the CAD/CAM materials can be properly crystallized if heat treated following the manufacturers' instructions. The crystallization process highly depends on temperature. ZLS glass ceramics show significantly inferior crystals dimensions and higher fracture toughness and Vickers hardness than LS2 ceramic. hPDLSCs cultured on LS2 have a superior adhesion than those cultured on ZLS. CLINICAL SIGNIFICANCE The clinical interest of this study relies on the demonstration that a proper heat-treatment of CAD/CAM lithium disilicate and ZLS glass ceramics generates products that are suitable for clinical service. The differences highlightable in mechanical properties and biocompatibility behaviour do not affect their successful clinical application.
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Affiliation(s)
- Luan Mavriqi
- Department of Dentistry, Albanian University, 1001 Tirana, Albania
| | - Francesco Valente
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Giovanna Murmura
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Bruna Sinjari
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Monica Macrì
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Oriana Trubiani
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Sergio Caputi
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Tonino Traini
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy.
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Schroeder G, Rösch P, Kunzelmann KH. Influence of the preparation design on the survival probability of occlusal veneers. Dent Mater 2022; 38:646-654. [DOI: 10.1016/j.dental.2022.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 01/08/2022] [Accepted: 02/12/2022] [Indexed: 11/03/2022]
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Thermoanalytical Investigations on the Influence of Storage Time in Water of Resin-Based CAD/CAM Materials. Biomedicines 2021; 9:biomedicines9121779. [PMID: 34944594 PMCID: PMC8698771 DOI: 10.3390/biomedicines9121779] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022] Open
Abstract
New resin-based composites and resin-infiltrated ceramics are used to fabricate computer-aided design (CAD) and computer-aided manufacturing (CAM)-based restorations, although little information is available on the long-term performance of these materials. The aim of this investigation was to determine the effects of storage time (24 h, 90 days, 180 days) on the thermophysical properties of resin-based CAD/CAM materials. Thermogravimetric Analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) were used in the study. TGA provided insight into the composition of the resin-based materials and the influence of internal plasticization and water sorption. Resin-based composites showed different decomposition, heat energy and mechanical behavior, which was influenced by storage time in water. Individual materials such as Grandio bloc showed lower influence of water storage while maintaining good mechanical properties.
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Longevity of Polymer-Infiltrated Ceramic Network and Zirconia-Reinforced Lithium Silicate Restorations: A Systematic Review and Meta-Analysis. MATERIALS 2021; 14:ma14175058. [PMID: 34501148 PMCID: PMC8434158 DOI: 10.3390/ma14175058] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/22/2021] [Accepted: 08/31/2021] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to systematically review the existing literature to assess the clinical survival and success of PICN and ZLS indirect restorations as the clinical evidence for them remains lacking. PubMed, SCOPUS, Embase, Cochrane Library, Web of Science, LILACs, and SciElo databases were searched from 1 January 2000 to 1 February 2021. Clinical trials and cohort studies published in English were included while case studies, case series, and in vitro studies were excluded. Results were analyzed qualitatively and a meta-analysis using a random effects model was performed. A strength of recommendation taxonomy (SORT) analysis was conducted and risk of bias (RoB) was assessed using the Newcastle-Ottawa scale and Cochrane RoB tools. An electronic search through the databases yielded 2454 articles, of which 825 remained after duplicate removal. Five studies investigating PICN and four investigating ZLS indirect restorations remained after assessing for eligibility. The overall survival rate of PICN over 1 year was 99.6% and 99.2% over 2 years. The overall survival rate of ZLS over 1 year was 99%. The main mode of failure for both materials was catastrophic fracture. One study had a high RoB, four had a moderate RoB, and four had a low RoB. Both materials demonstrated moderate strength of recommendation at a level 2 evidence for all studies based on SORT analysis. PICN and ZLS show promising short-term clinical performance as full and partial coverage indirect restorations, but longer follow-up studies are required to confirm their long-term performance.
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Resistance to Fracture of Lithium Disilicate Feldspathic Restorations Manufactured Using a CAD/CAM System and Crystallized with Different Thermal Units and Programs. MATERIALS 2021; 14:ma14123215. [PMID: 34200881 PMCID: PMC8230546 DOI: 10.3390/ma14123215] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 12/02/2022]
Abstract
The aim of this study was to determine the resistance to fracture of feldspathic restorations with lithium disilicate and crystallized with different ovens and programs. Methods: Sixty monolithic restorations (LD) (EMAX CAD™ LT, Ivoclar-Vivadent™) were designed with the same parameters and milled with a CAD/CAM system (CEREC SW 5.1, CEREC MCXL, Dentsply-Sirona™, Bensheim). Each restoration was randomly assigned by randomization software (RANDNUM) to one of the three groups: (a) (NF) Oven P310 (Ivoclar, Vivadent) normal crystallization program, (b) (FF) Ivoclar P310 oven (Ivoclar-Vivadent™) rapid crystallization program, or (c) (SF) SpeedFire oven (Dentsply-Sirona™). Results: There were statistically significant differences between the groups (ANOVA, p < 0.05). The NF and FF groups showed the highest values of resistance to fracture, with statistically significant differences with the SF group. Conclusions: Using a furnace from the same dental company with predetermined programs from the material manufacturer, as well as using a predetermined program for rapid crystallization, has no effect on fracture resistance, and would save clinical time when performing ceramic restorations with lithium disilicate, while keeping their mechanical properties.
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Optical behaviors, surface treatment, adhesion, and clinical indications of zirconia-reinforced lithium silicate (ZLS): A narrative review. J Dent 2021; 112:103722. [PMID: 34118284 DOI: 10.1016/j.jdent.2021.103722] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVES The present narrative review was focused on the optical properties, surface treatment, adhesion, and clinical indications of zirconia-reinforced lithium silicate ceramics (ZLS) for Computer-aided design / Computer-aided manufacturing (CAD/CAM) technologies. DATA/SOURCES A literature search was performed by 3 calibrated independent researchers on PubMed, Scopus, Embase, Google Scholar, Dynamed, and Open Grey. The criteria for inclusion were: 1) papers addressing at least one of the following variables about ZLS: optical properties, surface treatment, adhesion, and clinical indications; 2) in vitro, in silico, or in vivo studies; 3) case reports; 4) systematic reviews. The exclusion criteria were: 1) animal studies; 2) non-dental studies; 3) studies only focusing on ZLS used in the heat-pressed process. STUDY SELECTION 98 records among in vitro studies and case reports were included. CONCLUSIONS Despite the promising microstructure characteristics of ZLS, increased translucency compared to lithium disilicate ceramics (LS2) was not proven, but acceptable color changes and stability were reported. Mechanical polishing was the most effective method to reduce surface roughness. Moreover, machinability and handling of ZLS resulted harder than LS2. Conventional acid etching procedures seemed effective in conditioning ZLS surface, but no protocol has been established yet. Besides, silane-coupling and dual-curing resin cements were recommended. CLINICAL SIGNIFICANCE ZLSs can be used for anterior and posterior fixed single-unit CAD/CAM restorations onto both natural teeth and implants, but do not seem to represent a viable treatment option for endocrowns onto posterior teeth or fixed dental prostheses.
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Zarone F, Ruggiero G, Leone R, Breschi L, Leuci S, Sorrentino R. Zirconia-reinforced lithium silicate (ZLS) mechanical and biological properties: A literature review. J Dent 2021; 109:103661. [PMID: 33864886 DOI: 10.1016/j.jdent.2021.103661] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/06/2021] [Accepted: 04/08/2021] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVES This paper aimed to provide a literature review of the mechanical and biological properties of zirconia-reinforced lithium silicate glass-ceramics (ZLS) in Computer-aided design / Computer-aided manufacturing (CAD/CAM) systems. DATA/SOURCES An extensive search of the literature for papers related to ZLS was made on the databases of PubMed/Medline, Scopus, Embase, Google Scholar, Dynamed, and Open Grey. The papers were selected by 3 independent calibrated reviewers. STUDY SELECTION The search strategy produced 937 records. After the removal of duplicates and the exclusion of papers that did not meet the inclusion criteria, 71 papers were included. CONCLUSIONS After reviewing the included records, it was found that two types of ZLS (Vita Suprinity PC; Vita Zahnfabrik and Celtra Duo; Dentsply Sirona) are nowadays available on the market for CAD/CAM systems, similar in their chemical composition, microstructure, and biological-mechanical properties. ZLS is reported to be a biocompatible material, whose fracture resistance can withstand physiological chewing loads. The firing process influences the improvements of strength and fatigue failure load, with a volumetric shrinkage. To date, ZLS can be considered a viable alternative to other glass-ceramics for fixed single restorations. CLINICAL SIGNIFICANCE . As to biocompatibility and mechanical properties of ZLS, data are still scarce, often controversial and limited to short-term observational periods. These promising ceramics require further in vitro/in vivo studies to accurately define mechanical and biological properties, mainly in the long-term performance of restorations produced with such materials.
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Affiliation(s)
- Fernando Zarone
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics and Digital Dentistry, University "Federico II" of Naples, Via Pansini 5, 80131, Naples, Italy.
| | - Gennaro Ruggiero
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics and Digital Dentistry, University "Federico II" of Naples, Via Pansini 5, 80131, Naples, Italy.
| | - Renato Leone
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics and Digital Dentistry, University "Federico II" of Naples, Via Pansini 5, 80131, Naples, Italy.
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna, Alma Mater Studiorum, Via San Vitale 59, 40125, Bologna, Italy.
| | - Stefania Leuci
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Oral Medicine Unit, School of Medicine, University "Federico II" of Naples, Via Pansini 5, 80131, Naples, Italy.
| | - Roberto Sorrentino
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics and Digital Dentistry, University "Federico II" of Naples, Via Pansini 5, 80131, Naples, Italy.
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Ozdogan A, Ozdemir H. Effects of multiple firing processes on the mechanical properties of lithium disilicate glass-ceramics produced by two different production techniques. J Prosthet Dent 2020; 125:527.e1-527.e7. [PMID: 33243470 DOI: 10.1016/j.prosdent.2020.10.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 10/20/2020] [Accepted: 10/20/2020] [Indexed: 11/17/2022]
Abstract
STATEMENT OF PROBLEM Repeated firings cause materials to be exposed to additional heat treatments. The effect of these additional heat treatments on the mechanical properties of lithium disilicate glass-ceramics is not fully known. PURPOSE The purpose of this in vitro study was to determine the effects of repeated firing on the mechanical properties of lithium disilicate glass-ceramics produced by 2 different techniques, press and computer-aided design and computer-aided manufacturing (CAD-CAM). MATERIAL AND METHODS Eighty rectangular (25×4×2 mm) lithium disilicate glass-ceramic specimens were used in this study, 40 produced by heat pressing and 40 by milling, and divided into 4 groups (n=10) with a different number of veneer porcelain firings (1 to 4). After firing, the Vickers hardness, flexural strength (3-point bend test), and fracture toughness were determined, and the specimens were analyzed with an environmental scanning electron micrograph. Data were analyzed with analysis of variance (ANOVA) (α=.05). RESULTS The repeat firing processes did not affect the flexural strength of the specimens in either group (P>.05), while the surface hardness and fracture toughness were significantly changed (P<.05). CONCLUSIONS Increasing the number of firings adversely affected the mechanical properties of lithium disilicate glass-ceramics.
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Affiliation(s)
- Alper Ozdogan
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Atatürk University, Erzurum, Turkey.
| | - Hatice Ozdemir
- Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Atatürk University, Erzurum, Turkey
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Diniz V, Condé Oliveira Prado PH, Meireles Rodrigues JV, Monteiro JB, Zucuni C, Valandro LF, Melo RM. Ceramic firing protocols and thermocycling: effects on the load-bearing capacity under fatigue of a bonded zirconia lithium silicate glass-ceramic. J Mech Behav Biomed Mater 2020; 110:103963. [DOI: 10.1016/j.jmbbm.2020.103963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/24/2020] [Accepted: 06/28/2020] [Indexed: 12/19/2022]
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Ongun S, Önöral Ö, Günal-Abduljalil B. Evaluation of shade correspondence between current monolithic CAD/CAM blocks and target shade tab by considering the influence of cement shade and restorative material thickness. Odontology 2020; 109:393-402. [PMID: 32989521 DOI: 10.1007/s10266-020-00554-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 09/11/2020] [Indexed: 11/28/2022]
Abstract
It was aimed to evaluate shade matching between novel CAD/CAM blocks and the A2 target shade tab by considering the influence of cement shade and restorative material thickness on the chromatic background. A total number of 120 rectangular-shaped specimens were subtracted from four different prefabricated CAD/CAM blocks [Vita Enamic (VE), Lava Ultimate (LU), GC Cerasmart (GC), and Vita Mark II (VMII)]. These specimens had thicknesses of 0.5 mm and 1.0 mm. Three different shades (A2, opaque, and translucent) of dual-polymerized resin cement were chosen. The dentin shade (A3.5) restorative composite foundation was incrementally fabricated in a silicon mold. For control group, the A2 shade tab of the Vitapan classical shade guide was used. Different restorative material-cement-foundation assemblies were generated with optic gel. Color readings were performed by using a clinical spectrophotometer, and CIEDE2000 (ΔE00) formula was used to assess color differences. Data were statistically analyzed (α = 0.05). With increasing thickness, color difference values decreased. Higher mean ΔE00 units were observed in all restorative material sub-groups for 0.5 mm thickness. In TR shade, no statistically significant difference was detected among the mean ΔE00 values of 0.5 mm-thick restorative materials. Color differences in groups 1.0 mm-opaque-LU and 1.0 mm-opaque-GC indicated perceptible but clinically acceptable values (0.8˂ΔE00 ≤ 1.8). The highest and lowest ΔE00 units were observed in the 0.5 mm-A2-VE group (ΔE00 = 7.07) and 1 mm-opaque-GC group (ΔE00 = 1.46), respectively. Luting cement shade, restorative material type, and thickness significantly influenced the resultant color of restoration. Opaque cement on dentin foundation exhibited lower color differences.
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Affiliation(s)
- Salim Ongun
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Near East Boulevard, 99138, Mersin 10, Nicosia, Turkey.
| | - Özay Önöral
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Near East Boulevard, 99138, Mersin 10, Nicosia, Turkey
| | - Burcu Günal-Abduljalil
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Near East Boulevard, 99138, Mersin 10, Nicosia, Turkey
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Souza J, Fuentes MV, Baena E, Ceballos L. One-year clinical performance of lithium disilicate versus resin composite CAD/CAM onlays. Odontology 2020; 109:259-270. [PMID: 32705420 PMCID: PMC7790784 DOI: 10.1007/s10266-020-00539-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 07/09/2020] [Indexed: 11/28/2022]
Abstract
To compare the 1-year clinical performance of lithium disilicate and resin composite CAD/CAM onlay restorations. Twenty patients that required two restorations in posterior teeth, with at least one cusp to be covered, received two onlays. One was made with IPS e.max CAD (Ivoclar-Vivadent) and the other with Lava Ultimate (3M Oral Care). Two blind observers evaluated the restorations at baseline and 1 year after the onlays were cemented, according to FDI criteria. At each recall, digital photographs, bite-wing radiographs and impressions of the restorations were taken for SEM evaluation of the interface. Results were analyzed by Mann–Whitney U and Wilcoxon tests (p < 0.05). At baseline and in the 1-year recall, both CAD/CAM materials exhibited excellent results in most criteria with similar esthetic, functional and biological properties (p > 0.05). However, deterioration in surface lustre (p = 0.020) and color match/translucency (p = 0.039) were detected for IPS e.max CAD onlays after 1-year. Under SEM evaluation, there were no statistically differences in micromorphological criteria at baseline nor after a year between IPS e.max CAD and Lava Ultimate onlays. Conclusion: After 1 year of clinical service IPS e.max CAD and Lava Ultimate onlays showed a similar clinical performance that needs to be confirmed in long-term evaluations.
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Affiliation(s)
- Joana Souza
- Area of Stomatology, IDIBO Research Group, Health Sciences Faculty, Rey Juan Carlos University, Avenida de Atenas s/n, 28922, Alcorcón, Madrid, Spain
| | - Mª Victoria Fuentes
- Area of Stomatology, IDIBO Research Group, Health Sciences Faculty, Rey Juan Carlos University, Avenida de Atenas s/n, 28922, Alcorcón, Madrid, Spain
| | - Eugenia Baena
- Area of Stomatology, IDIBO Research Group, Health Sciences Faculty, Rey Juan Carlos University, Avenida de Atenas s/n, 28922, Alcorcón, Madrid, Spain
| | - Laura Ceballos
- Area of Stomatology, IDIBO Research Group, Health Sciences Faculty, Rey Juan Carlos University, Avenida de Atenas s/n, 28922, Alcorcón, Madrid, Spain.
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Moradi Z, Abbasi M, Khalesi R, Tabatabaei MH, Shahidi Z. Fracture Toughness Comparison of Three Indirect Composite Resins Using 4-Point Flexural Strength Method. Eur J Dent 2020; 14:212-216. [PMID: 32283561 PMCID: PMC7274826 DOI: 10.1055/s-0040-1708438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Objectives
The advantages of indirect composite restorations such as less crack formation during their computer-aided design/computer-aided manufacturing process, compared with ceramic restorations, have resulted in their growing popularity. However, restoration failure is a major concern with regard to the long-term clinical success of restorations and may occur as the result of propagation of a crack originated from an internal flaw in the restoration. This study aimed to compare the fracture toughness of three indirect composite resins.
Materials and Methods
In this
in vitro
experimental study, 10 specimens measuring 3 × 3 × 18 mm were fabricated of Gradia, Crios, and high impact polymer composite indirect composites. A single edge notch with a diameter < 0.3 mm and 0.3 mm length was created in the 9 mm longitudinal dimension of specimens using a no. 11 surgical scalpel. The specimens were then subjected to 4-point flexural strength test in a universal testing machine with a crosshead speed of 0.1 mm/s until failure.
Statistical Analysis
Data were analyzed using IBM SPSS Statistics via one-way analysis of variance (ANOVA) and Tukey’s HSD (honestly significant difference) test. The statistical power was set at
p
˂ 0.05.
Results
One-way ANOVA showed a significant difference in fracture toughness of the three composite groups (
p
= 0.000). According to the Tukey HSD analysis, the fracture toughness of HIPC was significantly higher than that of the other two composites. The fracture toughness of Gradia was significantly lower among all.
Conclusions
Within the limitations of this study, the results showed that high temperature-pressure polymerization can increase resistance to crack propagation and subsequently improve the clinical service of indirect composite restorations. Although we do not know the filler volume percentage of HIPC, it seems that filler volume percentage of the composite is inversely correlated with fracture toughness.
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Affiliation(s)
- Zohreh Moradi
- Department of Restorative Dentistry, Tehran University of Medical Science, Tehran, Iran
| | - Mahdi Abbasi
- Department of Restorative Dentistry, Tehran University of Medical Science, Tehran, Iran
| | - Rayhaneh Khalesi
- Department of Restorative Dentistry, Jondishapour University of Medical Science, Ahvaz, Iran
| | | | - Zahra Shahidi
- Department of Restorative Dentistry, Tehran University of Medical Science, Tehran, Iran
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Tan G, Zhang J, Zheng L, Jiao D, Liu Z, Zhang Z, Ritchie RO. Nature-Inspired Nacre-Like Composites Combining Human Tooth-Matching Elasticity and Hardness with Exceptional Damage Tolerance. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1904603. [PMID: 31713926 DOI: 10.1002/adma.201904603] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/24/2019] [Indexed: 06/10/2023]
Abstract
Making replacements for the human body similar to natural tissue offers significant advantages but remains a key challenge. This is pertinent for synthetic dental materials, which rarely reproduce the actual properties of human teeth and generally demonstrate relatively poor damage tolerance. Here new bioinspired ceramic-polymer composites with nacre-mimetic lamellar and brick-and-mortar architectures are reported, which resemble, respectively, human dentin and enamel in hardness, stiffness, and strength and exhibit exceptional fracture toughness. These composites are additionally distinguished by outstanding machinability, energy-dissipating capability under cyclic loading, and diminished abrasion to antagonist teeth. The underlying design principles and toughening mechanisms of these materials are elucidated in terms of their distinct architectures. It is demonstrated that these composites are promising candidates for dental applications, such as new-generation tooth replacements. Finally, it is believed that this notion of bioinspired design of new materials with unprecedented biologically comparable properties can be extended to a wide range of material systems for improved mechanical performance.
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Affiliation(s)
- Guoqi Tan
- Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Jian Zhang
- Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Long Zheng
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, 130022, China
| | - Da Jiao
- Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Zengqian Liu
- Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Zhefeng Zhang
- Laboratory of Fatigue and Fracture for Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Robert O Ritchie
- Department of Materials Science and Engineering, University of California Berkeley, Berkeley, CA, 94720, USA
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Aziz A, El-Mowafy O, Tenenbaum HC, Lawrence HP, Shokati B. Clinical performance of chairside monolithic lithium disilicate glass-ceramic CAD-CAM crowns. J ESTHET RESTOR DENT 2019; 31:613-619. [PMID: 31565848 DOI: 10.1111/jerd.12531] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/15/2019] [Accepted: 08/25/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVES To evaluate the clinical performance and the effect of various patient and provider-related factors on the longevity of chairside monolithic posterior lithium disilicate glass-ceramic (LDGC) computer-aided design (CAD)-computer-aided manufacturing (CAM) crowns provided by predoctoral students. MATERIALS AND METHODS A sample of posterior LDGC CAD-CAM crowns was evaluated. Crown preparations were milled chairside using the CEREC Omnicam system and cemented with Rely-X Unicem or Calibra Universal resin cements. Clinical assessment of the crowns and supporting periodontal structures was performed using the modified California Dental Association (CDA) criteria. Intraoral photographs as well as radiographs were taken for further assessment by two evaluators. Kaplan-Meier survival analysis was performed. RESULTS A total of 40 crowns were inserted in 32 patients and evaluated for 4 years. Three complications were observed (two-technical and one-biological). No chipping or fracture of crowns was observed. No significant association was found between age, sex, periodontal condition, tooth type, tooth vitality, cement type, and longevity. The 4-year cumulative survival and success rates were 95.0 and 92.3%, respectively. CONCLUSION Chairside LDGC CAD-CAM crowns exhibited a high survival rate after 4 years in function and were shown to be a viable and reliable treatment option for posterior teeth. CLINICAL SIGNIFICANCE The high survival rate of chairside CAD-CAM crowns observed in this study suggests the likelihood of predictable performance in the predoctoral setup.
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Affiliation(s)
- Ahmed Aziz
- Faculty of Dentistry, Department of Restorative Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Omar El-Mowafy
- Faculty of Dentistry, Department of Restorative Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Howard C Tenenbaum
- Faculty of Dentistry, Department of Periodontics, University of Toronto, Toronto, Ontario, Canada.,Sinai Health System, Toronto, Ontario, Canada
| | - Herenia P Lawrence
- Faculty of Dentistry, Department of Dental Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Babak Shokati
- Faculty of Dentistry, Department of Prosthodontics, University of Toronto, Toronto, Ontario, Canada
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Bergamo ET, Bordin D, Ramalho IS, Lopes AC, Gomes RS, Kaizer M, Witek L, Bonfante EA, Coelho PG, Del Bel Cury AA. Zirconia-reinforced lithium silicate crowns: Effect of thickness on survival and failure mode. Dent Mater 2019; 35:1007-1016. [DOI: 10.1016/j.dental.2019.04.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 02/12/2019] [Accepted: 04/12/2019] [Indexed: 10/26/2022]
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Hampe R, Theelke B, Lümkemann N, Eichberger M, Stawarczyk B. Fracture Toughness Analysis of Ceramic and Resin Composite CAD/CAM Material. Oper Dent 2019; 44:E190-E201. [DOI: 10.2341/18-161-l] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives:
To evaluate and compare the fracture toughness of dental CAD/CAM materials of different material classes intended for in-office milling (glass ceramics, hybrid, resin composites) and the influence of aging on this property.
Methods and Materials:
The fracture toughness (critical intensity factor, KIc) values of 9 CAD/CAM restorative materials (Ambarino High-Class, Brilliant Crios, Cerasmart, exp. CAD/CAM composite, Katana Avencia, Lava Ultimate, VITA Enamic, IPS Empress CAD, and IPS e.max CAD) were determined using the SEVNB method in a four-point bending setup. Twenty bending bars of each material with a 4 × 3 cross and a minimum length of 12 mm were cut out of CAD/CAM milling blocks. Notching was done starting with a pre-cut and consecutive polishing and v-shaping with a razor blade, resulting in a final depth of v-shaped notches of between 0.8 and 1.2 mm. Half of the specimens were selected for initial fracture toughness measurements. The others were thermocycled in distilled water for 30,000× (5/55°C; 30-second dwell time) before testing. Specimen fracture surfaces were analyzed using confocal laser scanning microscopy.
Results:
All specimens for each material fractured into two fragments and showed the typical compression curl and brittle failure markings. Comparing initial KIc values, lithium disilicate ceramic IPS e.max CAD showed significantly the highest and leucite-reinforced ceramic IPS Empress CAD significantly the lowest KIc values (p<0.001). All tested CAD/CAM materials with a resin component ranged in the same KIc value group (p>0.999-0.060). After thermal cycling, the highest KIc values were measured for lithium disilicate ceramic IPS e.max CAD, followed by resin composite materials Ambarino High-Class (p<0.001-0.006) and hybrid material VITA Enamic (p<0.001-0.016), while the significantly lowest values were reflected for the resin composite materials Cerasmart, LAVA Ultimate (p<0.001-0.006), and Katana Avencia (p<0.001-0.009). The roughness of the fracture surfaces varied depending on the microstructure of the respective material. The ceramic surfaces showed the smoothest surfaces. The fracture surface of VITA Enamic revealed microstructural inhomogeneities and microcracks. For CAD/CAM resin composite materials, crack paths through the matrix and interfaces of matrix and fillers could be observed at the microstructure level.
Conclusions:
The materials tested show differences in fracture toughness typical for the class they belong to. With one exception (Ambarino High-Class), thermocycling affected the fracture toughness of materials with a resin component negatively, whereas the leucite and lithium disilicate ceramic showed stability.
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Affiliation(s)
- R Hampe
- Rüdiger Hampe, Dipl-Ing (FH), MSc, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany
| | - B Theelke
- Björn Theelke, Dipl-Ing (FH), School of Metallurgy and Materials, University of Birmingham, Birmingham, UK
| | - N Lümkemann
- Nina Lümkemann, MSc, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany
| | - M Eichberger
- Marlis Eichberger, CDT, Department of Prosthodontics, Dental School Ludwig-Maximilians-University, Munich, Germany
| | - B Stawarczyk
- Bogna Stawarczyk, PhD, Dr Dipl-Ing (FH), MSc, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany
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Rosentritt M, Preis V, Behr M, Krifka S. In-vitro performance of CAD/CAM crowns with insufficient preparation design. J Mech Behav Biomed Mater 2019; 90:269-274. [DOI: 10.1016/j.jmbbm.2018.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 10/01/2018] [Accepted: 10/01/2018] [Indexed: 11/17/2022]
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33
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Meng H, Xie H, Yang L, Chen B, Chen Y, Zhang H, Chen C. Effects of multiple firings on mechanical properties and resin bonding of lithium disilicate glass-ceramic. J Mech Behav Biomed Mater 2018; 88:362-369. [DOI: 10.1016/j.jmbbm.2018.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/15/2018] [Accepted: 08/19/2018] [Indexed: 10/28/2022]
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Abu-Izze F, Ramos G, Borges A, Anami L, Bottino M. Fatigue behavior of ultrafine tabletop ceramic restorations. Dent Mater 2018; 34:1401-1409. [DOI: 10.1016/j.dental.2018.06.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 05/29/2018] [Accepted: 06/07/2018] [Indexed: 10/28/2022]
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Sadid-Zadeh R, Alexander A. Digital workflow to rehabilitate worn dentition on a non-hinge simulated patient. J Prosthet Dent 2018; 120:645-650. [PMID: 29961630 DOI: 10.1016/j.prosdent.2018.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 02/06/2018] [Accepted: 02/06/2018] [Indexed: 11/15/2022]
Abstract
This report describes the complete mouth rehabilitation of worn dentition by using a digital workflow on a non-hinge simulated patient. A dentiform was used to simulate a patient with loss of occlusal vertical dimension. Physical diagnostic waxing along with a digital workflow was then used to re-establish the occlusal vertical dimension at the interim and definitive restoration stages.
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Affiliation(s)
- Ramtin Sadid-Zadeh
- Assistant Professor, Department of Restorative Dentistry, University at Buffalo School of Dental Medicine, Buffalo, NY.
| | - Anthony Alexander
- Resident, Department of Restorative Dentistry, University at Buffalo School of Dental Medicine, Buffalo, NY
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36
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Belli R, Zorzin JI, Lohbauer U. Fracture Toughness Testing of Dental Restoratives: a Critical Evaluation. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s40496-018-0184-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pfeilschifter M, Preis V, Behr M, Rosentritt M. Edge strength of CAD/CAM materials. J Dent 2018; 74:95-100. [DOI: 10.1016/j.jdent.2018.05.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 04/21/2018] [Accepted: 05/08/2018] [Indexed: 11/26/2022] Open
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Xu Z, Yu P, Arola DD, Min J, Gao S. A comparative study on the wear behavior of a polymer infiltrated ceramic network (PICN) material and tooth enamel. Dent Mater 2017; 33:1351-1361. [DOI: 10.1016/j.dental.2017.08.190] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 08/08/2017] [Accepted: 08/31/2017] [Indexed: 11/26/2022]
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Mokhtarpour F, Alaghehmand H, Khafri S. Effect of hydrofluoric acid surface treatments on micro-shear bond strength of CAD/CAM ceramics. Electron Physician 2017; 9:5487-5493. [PMID: 29238488 PMCID: PMC5718852 DOI: 10.19082/5487] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Accepted: 07/26/2016] [Indexed: 11/20/2022] Open
Abstract
Introduction Dental ceramics are appreciated as highly esthetic restorative materials that can simulate the appearance of natural dentition better than other materials. The aim of this study was to evaluate the effect of hydrofluoric acid concentration and etching time on micro-shear bond strength (μSBS) to IPS e.max CAD and Vita Mark II of a dual cured resin cement (Panavia F2.0). Methods This study was an experimental in vitro study, performed in the dental material research center of Babol University of Medical Sciences in 2016. Two hydrofluoric acid concentrations (5% and 10%) and three different etching times (20, 60 and 120 seconds) were used to etch the specimens respectively. A silane coupling agent (Clearfil porcelain activator) and priming and bonding agent (Clearfil SE bond) were used on the etched surfaces in accordance to the manufacturer’s instructions of use. Then resin cement was applied on the prepared ceramic surfaces and light cured. μSBS between resin cement and the porcelains were measured with a universal testing machine. Mode of failure was observed with 40× magnification by means of a Stereo microscope. Data were analyzed with ANOVA and independent-samples t-test and Chi-square tests. Results In both e.max and Vita Mark II groups, μSBS were not significantly different when different etching times (one-way ANOVA) and HF acid concentrations (Independent-samples t-test) were used (p>0.05), but the highest μSBS was shown in e.max specimens etched 60 s with 5% HF and Vita Mark II specimens etched 20 s with 10% HF. μSBS of e.max was significantly higher than Vita Mark II (p=0.00). Conclusion Best surface treatment for e.max and Vita Mark II ceramics is 20 s etch using 5 % hydrofluoric acid.
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Affiliation(s)
- Faraneh Mokhtarpour
- Assistant Professor, Department of Esthetic and Restorative Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Homayoon Alaghehmand
- Associate Professor, Dental Materials Research Center, Department of Esthetic and Restorative Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Soraya Khafri
- Ph.D. of Biostatistics, Assistant Professor, Department of Biostatistics and Epidemiology, Faculty member of Biostatistics Sciences, Babol University of Medical Sciences, Babol, Iran
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Rosentritt M, Preis V, Behr M, Hahnel S. Influence of preparation, fitting, and cementation on the vitro performance and fracture resistance of CAD/CAM crowns. J Dent 2017; 65:70-75. [DOI: 10.1016/j.jdent.2017.07.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 06/29/2017] [Accepted: 07/08/2017] [Indexed: 11/24/2022] Open
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Schwindling FS, Rues S, Schmitter M. Fracture resistance of glazed, full-contour ZLS incisor crowns. J Prosthodont Res 2017; 61:344-349. [DOI: 10.1016/j.jpor.2016.12.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/14/2016] [Accepted: 12/23/2016] [Indexed: 10/20/2022]
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Paes PNG, Bastian FL, Jardim PM. The influence of Y-TZP surface treatment on topography and ceramic/resin cement interfacial fracture toughness. Dent Mater 2017; 33:976-989. [PMID: 28662861 DOI: 10.1016/j.dental.2017.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 05/05/2017] [Accepted: 06/07/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Consider the efficacy of glass infiltration etching (SIE) treatment as a procedure to modify the zirconia surface resulting in higher interfacial fracture toughness. METHODS Y-TZP was subjected to 5 different surface treatments conditions consisting of no treatment (G1), SIE followed by hydrofluoric acid treatment (G2), heat treated at 750°C (G3), hydrofluoric acid treated (G4) and airborne-particle abrasion with alumina particles (G5). The effect of surface treatment on roughness was evaluated by Atomic Force Microscopy providing three different parameters: Ra, Rsk and surface area variation. The ceramic/resin cement interface was analyzed by Fracture Mechanics KI test with failure mode determined by fractographic analysis. Weibull's analysis was also performed to evaluate the structural integrity of the adhesion zone. RESULTS G2 and G4 specimens showed very similar, and high Ra values but different surface area variation (33% for G2 and 13% for G4) and they presented the highest fracture toughness (KIC). Weibull's analysis showed G2 (SIE) tendency to exhibit higher KIC values than the other groups but with more data scatter and a higher early failure probability than G4 specimens. SIGNIFICANCE Selective glass infiltration etching surface treatment was effective in modifying the zirconia surface roughness, increasing the bonding area and hence the mechanical imbrications at the zirconia/resin cement interface resulting in higher fracture toughness (KIC) values with higher KIC values obtained when failure probability above 20% was expected (Weibull's distribution) among all the experimental groups.
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Affiliation(s)
- P N G Paes
- Department of Metallurgical and Materials Engineering, Federal University of Rio de Janeiro, COPPE/UFRJ, P.O. Box 68505, CEP 21941-972 Rio de Janeiro, Brazil.
| | - F L Bastian
- Department of Metallurgical and Materials Engineering, Federal University of Rio de Janeiro, COPPE/UFRJ, P.O. Box 68505, CEP 21941-972 Rio de Janeiro, Brazil
| | - P M Jardim
- Department of Metallurgical and Materials Engineering, Federal University of Rio de Janeiro, COPPE/UFRJ, P.O. Box 68505, CEP 21941-972 Rio de Janeiro, Brazil
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AL‐Rabab'ah M, Hamadneh W, Alsalem I, Khraisat A, Abu Karaky A. Use of High Performance Polymers as Dental Implant Abutments and Frameworks: A Case Series Report. J Prosthodont 2017; 28:365-372. [DOI: 10.1111/jopr.12639] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2017] [Indexed: 11/30/2022] Open
Affiliation(s)
- Mohammad AL‐Rabab'ah
- Department of Conservative Dentistry, School of DentistryThe University of Jordan Amman Jordan
| | | | | | - Ameen Khraisat
- Department of Conservative Dentistry, School of DentistryThe University of Jordan Amman Jordan
| | - Ashraf Abu Karaky
- Department of Oral and Maxillofacial Surgery, Oral Medicine and Periodontology, School of DentistryThe University of Jordan Amman Jordan
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Duarte S, Sartori N, Phark JH. Ceramic-Reinforced Polymers: CAD/CAM Hybrid Restorative Materials. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s40496-016-0102-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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