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Kuusisto N, Abushahba F, Syrjänen S, Huumonen S, Vallittu P, Närhi T. Zirconia implants interfere with the evaluation of peri-implant bone defects in cone beam computed tomography (CBCT) images even with artifact reduction, a pilot study. Dentomaxillofac Radiol 2023; 52:20230252. [PMID: 37641961 DOI: 10.1259/dmfr.20230252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023] Open
Abstract
OBJECTIVES Three-dimensional cone beam computed tomography (CBCT) imaging can be considered, especially in patients with complicated peri-implantitis (PI). Artifacts induced by dense materials are the drawback of CBCT imaging and the peri-implant bone condition may not be assessed reliably because the artifacts are present in the same area. This pilot study investigates the performance of the artifact reduction algorithm (ARA) of the Planmeca Viso G7 CBCT device (Planmeca, Helsinki, Finland) with three different implant materials and imaging parameters. METHODS Three pairs of dental implants consisting of titanium, zirconia, and fiber reinforced composite (FRC) were set into a pig mandible. A vertical defect simulating peri-implantitis bone loss was made on the buccal side of one of each implant. The defect was identified and measured by two observers and compared to the actual dimensions. In addition, the bone structure and the marginal cortex visibility between the implants were estimated visually. RESULTS The bone defect and its dimensions with the zirconia implant could not be identified in any image with or without the metal artifact reduction algorithm. The bone defect of titanium and FRC implants were identified with all three imaging parameters or even without ARA. The interobserver agreement between the two observers was almost perfect for all categories analyzed. CONCLUSION Peri-implantitis defect of the zirconia implant and the peri-implant bone structure of the zirconia implants cannot be recognized reliably with any ARA levels, or any imaging parameters used with the Planmeca Viso G7. The need for ARA when imaging the peri-implant bone condition of the titanium and FRC implants may be unnecessary.
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Affiliation(s)
- Niina Kuusisto
- Department of Oral Pathology and Radiology, Institute of Dentistry, University of Turku, Turku, Finland
- Department of Radiology, Päijät-Häme Central Hospital, Lahti, Finland
| | - Faleh Abushahba
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, Turku, Finland
| | - Stina Syrjänen
- Department of Oral Pathology and Radiology, Institute of Dentistry, University of Turku, Turku, Finland
| | - Sisko Huumonen
- Institute of Dentistry, University of Eastern Finland, Kuopio, Finland
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland
| | - Pekka Vallittu
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Turku, Finland
- Welfare Division, City of Turku, Turku, Finland
| | - Timo Närhi
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, Turku, Finland
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Matthes de Freitas Pontes K, Fontenelle ISDO, Nascimento CD, Oliveira VDC, Albuquerque Garcia B, Silva PGDB, Henrique LDS, de Souza KM, Pontes CDB. Clinical study of the biofilm of implant-supported complete dentures in healthy patients. Gerodontology 2021; 39:148-160. [PMID: 33660315 DOI: 10.1111/ger.12547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 02/08/2021] [Accepted: 02/12/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The purpose of this study was to quantify the area covered by biofilm and identify bacteria and yeasts present in mandibular acrylic resin full-arch implant-supported fixed prostheses. BACKGROUND Biofilm control of implant-supported fixed prosthesis is hampered by their design, and it can cause oral and systemic problems, mainly in immunocompromised patients like the elder. Knowledge about microbiota reinforces the awareness about the need for periodic professional cleaning maintenance. MATERIALS AND METHODS Twenty prostheses were unscrewed, washed in 0.89% sodium chloride, stained with eosin 1% and photographed. The area covered by biofilm was digitally delimited and quantified. Biofilm samples were collected, diluted up to 1:107 , seeded in chromogenic agar media and incubated for 48 hours, at 37°C, for counting of colony-forming units (CFU/mL). DNA hybridization was performed to complement the identification and quantification of microorganisms. Data were analyzed using Mann-Whitney test, Spearman correlation and Fisher's exact test (α = .05). RESULTS An average of 62% of the gingival surface of the prostheses was covered by biofilm. Enterococcus spp. (5.82 ± 1.38 log10 CFU/mL) and Staphylococcus aureus (5.75 ± 2.02 log10 CFU/mL) showed higher prevalence in cultures. Patients with five implants had less biofilm compared to those with four implants (P = .031) but had higher Escherichia coli counts (P = .039). In DNA hybridization, Streptococcus pneumoniae, Veillonella parvula and Fusobacterium nucleatum presented higher quantification and were present in all the samples; patients over 65 years old contained more Candida tropicalis (P = .049); prostheses on five implants presented lower quantification for several species. CONCLUSION Biofilm was present on all prostheses, containing potentially pathogenic microorganisms. The number of implants may play a role in quantification of biofilm and in microorganism counts.
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Affiliation(s)
- Karina Matthes de Freitas Pontes
- Department of Restorative Dentistry, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Brazil.,Postgraduate Program in Dentistry, Federal University of Ceará, Fortaleza, Brazil
| | | | - Cássio do Nascimento
- Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Viviane de Cássia Oliveira
- School of Dentistry of Ribeirão Preto - Oral Rehabilitation Laboratory, University of São Paulo, Ribeirão Preto, Brazil
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Cervino G, Cicciù M, Herford AS, Germanà A, Fiorillo L. Biological and Chemo-Physical Features of Denture Resins. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3350. [PMID: 32731445 PMCID: PMC7435594 DOI: 10.3390/ma13153350] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 06/30/2020] [Accepted: 07/20/2020] [Indexed: 12/29/2022]
Abstract
In the dental field, the study of materials has always been the basis of the clinical practice. Over the years, with the evolution of materials, it has been possible to produce safe and predictable prosthetic devices, with ever better aesthetic features, biocompatibility and patient satisfaction. This review briefly analyzes the features of dental resin materials to underline the biological, microbiological and chemo-physical characteristics. The main aim of prosthodontics is to rehabilitate patients and therefore improve their quality of life. Dental resins are the main materials used for the production of dentures. Once solidified, these polymers have different mechanical or surface characteristics. The results of the literature on these characteristics were analyzed and some new brand dental resins, known as modern resin, were subsequently evaluated. The new materials are undoubtedly a step forward in the creation of dental prostheses, and also in all subsequent maintenance phases. This review shows how changing the chemical structure of the resins could have microbiological influences on the growth and management of the biofilm, and also physical influences in terms of its mechanical characteristics. The development of new materials is a constant goal in dentistry in order to obtain increasingly predictable rehabilitations.
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Affiliation(s)
- Gabriele Cervino
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, University of Messina, Policlinico G. Martino, Via Consolare Valeria, 98100 Messina, Italy; (G.C.); (L.F.)
| | - Marco Cicciù
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, University of Messina, Policlinico G. Martino, Via Consolare Valeria, 98100 Messina, Italy; (G.C.); (L.F.)
| | - Alan Scott Herford
- Department of Maxillofacial Surgery, Loma Linda University, Loma Linda, CA 92354, USA;
| | - Antonino Germanà
- Department of Veterinary Sciences, University of Messina, 98122 Messina, Italy;
| | - Luca Fiorillo
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, University of Messina, Policlinico G. Martino, Via Consolare Valeria, 98100 Messina, Italy; (G.C.); (L.F.)
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Fiber-Reinforced Composites for Dental Applications. BIOMED RESEARCH INTERNATIONAL 2018; 2018:4734986. [PMID: 30515400 PMCID: PMC6236806 DOI: 10.1155/2018/4734986] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 09/19/2018] [Indexed: 11/18/2022]
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Murat S, Alp G, Alatalı C, Uzun M. In Vitro Evaluation of Adhesion of Candida albicans on CAD/CAM PMMA-Based Polymers. J Prosthodont 2018; 28:e873-e879. [PMID: 29962017 DOI: 10.1111/jopr.12942] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2018] [Indexed: 01/05/2023] Open
Abstract
PURPOSE To compare the amount of adherent Candida albicans to different CAD/CAM poly(methyl methacrylate) (PMMA)-based polymers and conventional heat-polymerized PMMA after long-term thermal cycling. MATERIALS AND METHODS The specimens were subjected to 10,000 thermal cycles (5-55°C) and divided into two groups, uncoated and pellicle-coated. Surface roughness and contact angles of the specimens were measured. The surface morphology was observed with scanning electron microscopy (SEM). An adhesion test was performed by incubating the disk specimens in C. albicans suspensions at 37°C for 2 hours, and the adherent cells were counted under an optical microscope. The data were analyzed statistically using a variance analysis and Tukey HSD post hoc comparison test. The correlation between measurements was tested using a Pearson correlation analysis (α = 0.05). RESULTS CAD/CAM polymers generally showed statistically significant lowest Ra and contact angle values, whereas conventional PMMA showed the highest Ra and contact angle values in the uncoated group (p < 0.05). Pellicle coating essentially increased contact angle of all materials and reduced the differences in a number of Candida cells on the materials (p < 0.05). Candida adhesion was statistically significantly greatest on conventional PMMA when compared to CAD/CAM polymers. A strong positive correlation was found between the surface roughness of the specimens (p < 0.05) and the amount of adhered cells, whereas no correlation was found between hydrophobicity of the specimens and the amount of adhered cells (p > 0.05). CONCLUSIONS CAD/CAM PMMA-based polymers may be preferable to reduce Candida-associated denture stomatitis in long-term use.
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Affiliation(s)
- Sema Murat
- Department of Prosthodontics, Ankara University Faculty of Dentistry, Ankara, Turkey
| | - Gülce Alp
- Department of Prosthodontics, Okan University Faculty of Dentistry, Istanbul, Turkey
| | - Canan Alatalı
- Department of Medical Microbiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Meltem Uzun
- Department of Medical Microbiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
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de Castro DT, Valente MLC, da Silva CHL, Watanabe E, Siqueira RL, Schiavon MA, Alves OL, Dos Reis AC. Evaluation of antibiofilm and mechanical properties of new nanocomposites based on acrylic resins and silver vanadate nanoparticles. Arch Oral Biol 2016; 67:46-53. [PMID: 27023401 DOI: 10.1016/j.archoralbio.2016.03.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 12/09/2015] [Accepted: 03/12/2016] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The purpose of this study was evaluate, for the first time, the impact of incorporation of nanostructured silver vanadate (β-AgVO3) in antibiofilm and mechanical properties of dental acrylic resins (poly(methyl methacrylate), PMMA). DESIGN The β-AgVO3 was synthesized and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, and microanalysis (SEM/EDS). Resins specimens were prepared with 0-10% wt.% β-AgVO3 and characterized by SEM, XRD and optical microscopy. The antibiofim activity of the samples against Candida albicans and Streptococcus mutans was investigated by XTT reduction test, colony-forming units (CFUs), and confocal laser scanning microscopy (CLSM). The flexural strength, hardness, and surface roughness of the samples containing β-AgVO3 were compared with the pure PMMA matrix. RESULTS The incorporation of 10% β-AgVO3 significantly reduced the metabolic activity of C. albicans and S. mutans (p<0.05). There was a reduction in microbial load (CFU/mL) of microorganisms for the different concentrations used (p<0.05), which was confirmed by confocal microscopy. The addition of β-AgVO3 did not change the mechanical properties of hardness and surface roughness of the resins (p>0.05). However, flexural strength decreased with the addition of amounts greater than 1% (p<0.05). CONCLUSIONS β-AgVO3 additions in dental acrylic resin may have an impact on inhibition of biofilm of main microorganisms associated with dental prostheses. However, the viability of clinical use should be evaluated in function of changed promoted in some mechanical properties.
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Affiliation(s)
- Denise T de Castro
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Mariana L C Valente
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Cláudia H L da Silva
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Evandro Watanabe
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Renato L Siqueira
- Postgraduate Program in Materials Science and Engineering-PPG-CEM, Federal University of São Carlos-UFSCAR, São Carlos, SP, Brazil
| | - Marco A Schiavon
- Department of Natural Sciences, GPQM -Research Group of Materials Chemistry, Federal University of São João del Rei-UFSJ, São João del Rei, MG, Brazil
| | - Oswaldo Luiz Alves
- Laboratory of Solid State Chemistry, State University of Campinas (UNICAMP), Campinas, Brazil
| | - Andréa C Dos Reis
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil.
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