Base de dados : MEDLINE
Pesquisa : D25.339 [Categoria DeCS]
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[PMID]:29203742
[Au] Autor:Faustova MO; Ananieva MM; Basarab YO; Loban' GA
[Ad] Endereço:Higher State Educational Establishment Of Ukraine " Ukrainian Medical Stomatological Academy", Poltava, Ukraine.
[Ti] Título:Neutrophil bactericidal activity through the stages of placement of different dental implants depending on their chemical composition.
[So] Source:Wiad Lek;70(5):921-924, 2017.
[Is] ISSN:0043-5147
[Cp] País de publicação:Poland
[La] Idioma:eng
[Ab] Resumo:INTRODUCTION: The analysis of data provided by implant system manufacturers has demonstrated that implants, i.e. parts screwed into the bone, are of different chemical composition of the implant. Sometimes they have little amount of metal contaminants,which are not biologically passive. THE AIM: To explore the effects produced by dental titanium implants containing metal contaminants on the stimulation of antimicrobial properties of neutrophils. MATERIAL AND METHODS: A total of 24 patients who had from 1 to 4 titanium implants with different chemical compositions were subjected to the comprehensive check-up to this end. The functional activity of neutrophils was evaluated by nitroblue tetrazolium (NBT) reduction test. It was dynamically in 5-7 days after the implant fitting into the bone, and in 3 months after the procedure of implant placement. RESULTS: On the 5-7th day following the placement of implants with weight percentage of titanium (Ti) in the composition from 25 to 50%, the share of active neutrophils significantly increased compared with share of active neutrophils prior the surgical procedure. However, after 3 months, this parameter in patients with implants, whose titanium content was low, remained significantly high. CONCLUSIONS: The placement of dental implants systems led to an increase in the share of active neutrophils in the peripheral blood of the patients in 5-7 days following the procedure of implant insertion. However, this indicator for implant systems with a higher content of Ti in the remote period returned to its original value, which indicates their higher biocompatibility with the tissues of the human body.
[Mh] Termos MeSH primário: Reação a Corpo Estranho/metabolismo
Mediadores da Inflamação/metabolismo
Inflamação/metabolismo
Neutrófilos/metabolismo
Titânio
[Mh] Termos MeSH secundário: Implantes Dentários
Materiais Dentários
Feminino
Seguimentos
Seres Humanos
Masculino
Meia-Idade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Dental Implants); 0 (Dental Materials); 0 (Inflammation Mediators); D1JT611TNE (Titanium)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171206
[St] Status:MEDLINE


  2 / 14299 MEDLINE  
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[PMID]:28459251
[Au] Autor:Spath A; Smith C
[Ad] Endereço:Lecturer, University of California, Los Angeles, California; Private Practice, Newport Beach, California; Mentor, Kois Center, Seattle, Washington.
[Ti] Título:Removal of Modern Ceramics.
[So] Source:Compend Contin Educ Dent;38(5):326-333, 2017 May.
[Is] ISSN:2158-1797
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:With the overwhelming acceptance of lithium disilicate and zirconia, the frequency with which dentists have to remove these materials is increasing, and this can be difficult. Proper cement usage for full-coverage crowns with preparations that have retention and resistance can be helpful if in the future the restoration needs to be removed. When removing these modern materials, bur and laser techniques are both effective means, with each having specific benefits. Materials selection and preparation design are vital when considering areas of risk each patient exhibits and the potential need for removal.
[Mh] Termos MeSH primário: Cerâmica
Coroas
Materiais Dentários
Porcelana Dentária
Lasers
Zircônio
[Mh] Termos MeSH secundário: Cerâmica/química
Cimentos Dentários/química
Falha de Restauração Dentária
Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Dental Cements); 0 (Dental Materials); 0 (lithia disilicate); 12001-21-7 (Dental Porcelain); C6V6S92N3C (Zirconium); S38N85C5G0 (zirconium oxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE


  3 / 14299 MEDLINE  
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[PMID]:28459243
[Au] Autor:Shashirekha G; Jena A; Mohapatra S
[Ad] Endereço:Professor, Department of Conservative Dentistry & Endodontics, Institute of Dental Sciences, Siksha 'O' Anusandhan University, Bhubaneswar, Odisha, India.
[Ti] Título:Nanotechnology in Dentistry: Clinical Applications, Benefits, and Hazards.
[So] Source:Compend Contin Educ Dent;38(5):e1-e4, 2017 May.
[Is] ISSN:2158-1797
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Nanotechnology is emerging as an interdisciplinary field that is undergoing rapid development and has brought about enormous changes in medicine and dentistry. Nanomaterial-based design is able to mimic some of the mechanical and structural properties of native tissue and can promote biointegration. Nanotechnology has various applications in dentistry, including dentition renaturalization, therapy for dentin hypersensitivity, complete orthodontic realignment in a single visit, covalently bonding diamondized enamel, enhancing properties of root canal sealers, and continuous oral health maintenance using mechanical dentifrobots. A range of synthetic nanoparticles such as hydroxyapatite, bioglass, titanium, zirconia, and silver nanoparticles are proposed for dental restoration. This review focuses on the developments in the field of nanomaterials in dentistry in the form of tissue regeneration materials, implantable devices, nanocomposites, endodontic sealers etc. and issues of patient safety.
[Mh] Termos MeSH primário: Materiais Dentários
Odontologia/métodos
Nanotecnologia
[Mh] Termos MeSH secundário: Sistemas de Liberação de Medicamentos
Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Dental Materials)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE


  4 / 14299 MEDLINE  
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[PMID]:29182217
[Au] Autor:Pispili M; Pissiotis A; Michalakis K
[Ad] Endereço:Aristotle University of Thessaloniki.
[Ti] Título:The Effect of Surface Preparation of Acrylic Teeth.
[So] Source:Eur J Prosthodont Restor Dent;25(4):209-218, 2017 Dec 01.
[Is] ISSN:0965-7452
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:PURPOSE: To investigate whether the chemical bond between acrylic teeth and heat polymerized PMMA can be altered by chemical and/or mechanical treatment. MATERIALS AND METHODS: One hundred fifty acrylic teeth were divided in groups of 10. Their ridge lap surface underwent mechanical and/or chemical treatments: 1) no treatment, 2) air-abrasion with Al2O3 particles, 3) acid etching with phosphoric acid, 4) application of composite resin bonding agent, 5) application of MMA and ethylmethylketone bonding agent, 6) PMMA monomer application. The teeth were then placed in heat polymerized acrylic resin. Each specimen was compressed with a universal testing machine. Descriptive statistics, one-way ANOVA (α=0.05) and Tukey's HSD test were used. A scanning electron microscope (SEM) was also used to study the fracture areas. RESULTS: Statistically significant differences (p⟨0.001) in the bond strength were found. The strongest bond (239.41 N), was noted in the group treated with sandblasting followed by PMMA monomer application. CONCLUSIONS: Mechanical and/or chemical preparations affect significantly the bond strength between the acrylic resin denture teeth and the PMMA denture base. Air abrasion was the most effective treatment, either alone or combined with other treatments.
[Mh] Termos MeSH primário: Resinas Acrílicas
Colagem Dentária
Materiais Dentários
Polimetil Metacrilato
Preparo Prostodôntico do Dente
[Mh] Termos MeSH secundário: Teste de Materiais
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acrylic Resins); 0 (Dental Materials); 9011-14-7 (Polymethyl Methacrylate)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:171129
[St] Status:MEDLINE
[do] DOI:10.1922/EJPRD_01713Pispili10


  5 / 14299 MEDLINE  
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[PMID]:29182216
[Au] Autor:Viitaniemi L; Abdulmajeed A; Sulaiman T; Söderling E; Närhi T
[Ad] Endereço:Department of Prosthetic Dentistry and Stomatognathic Physiology, University of Turku, FINLAND.
[Ti] Título:Adhesion and Early Colonization of S. Mutans on Lithium Disilicate Reinforced Glass-Ceramics, Monolithic Zirconia and Dual Cure Resin Cement.
[So] Source:Eur J Prosthodont Restor Dent;25(4):228-234, 2017 Dec 01.
[Is] ISSN:0965-7452
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: Monolithic zirconia and glass ceramics are increasingly used in implant crowns. Limited data is available on bacterial adhesion and early biofilm formation on these materials. METHODS: Four different materials were investigated: (1) Lithium disilicate glass-ceramics (LDS), (2) Fully stabilized zirconia (FSZ), (3) Partially stabilized zirconia (PSZ), and (4) Dual curing cement (DCC). The materials' surfaces were characterized with spinning disc confocal microscopy and by water contact angle and surface free energy (SFE) measurements. For the adhesion tests the materials were rolled in suspensions of Streptococcus mutans. Early biofilm formation was studied on the materials and allowing the biofilms to form for 24 h. S. mutans cell counts were determined by plate culturing. ANOVA and post-hoc Tukey's tests (p⟨0.05) were used for statistical evaluation. RESULTS: The LDS surfaces were clearly hydrophilic with the highest SFE value (p⟨0.001). For S. mutans adhesion, the ranking of the materials from lowest to highest was: LDS = FSZ ⟨ DCC ⟨ PSZ (p⟨0.05). No significant differences among the materials were noticed in biofilm formation. CONCLUSIONS: LDS has lower S.mutans adhesion than other materials examined in this study, but the difference was not reflected in early biofilm formation.
[Mh] Termos MeSH primário: Aderência Bacteriana
Biofilmes
Cerâmica
Materiais Dentários
Porcelana Dentária
Cimentos de Resina
Streptococcus mutans/isolamento & purificação
Streptococcus mutans/fisiologia
Zircônio
[Mh] Termos MeSH secundário: Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DCR cement); 0 (Dental Materials); 0 (Resin Cements); 0 (lithia disilicate); 12001-21-7 (Dental Porcelain); 85422-94-2 (Glass ceramics); C6V6S92N3C (Zirconium); S38N85C5G0 (zirconium oxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:171129
[St] Status:MEDLINE
[do] DOI:10.1922/EJPRD_01711Viitaniemi07


  6 / 14299 MEDLINE  
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[PMID]:29182215
[Au] Autor:Abdulhameed N; Roulet JF; Chen C; Hussein H
[Ad] Endereço:PhD Student, Clinical Assistant Professor, University of Florida, College of Dentistry, Department of Restorative Dental Sciences, Center for Dental Biomaterials, 1395 Center Drive, Gainesville Fl 32608 USA.
[Ti] Título:A Measurement Protocol for the Marginal and Internal Fit of All-Ceramic Crowns.
[So] Source:Eur J Prosthodont Restor Dent;25(4):193-200, 2017 Dec 01.
[Is] ISSN:0965-7452
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:AIMS: To evaluate in vitro the influence of firing on marginal and internal fit of all-ceramic milled and pressed lithium-disilicate crowns. MATERIALS AND METHODS: One Standardized model with 1.6mm occlusal and 1.4mm axial reduction was used to fabricate 64 crowns. Using a factorial design, eight groups of lithium disilicate ceramics (n=8) using P=press, C=CAD/CAM, M=monolithic, O=coping, V=veneered, R=as produced: PMR, PMG, POR, PVG, CMR, CMG, COR, CVG. Crowns were produced and cemented on stone dies, then embedded in clear epoxy resin and sectioned into two plains. With a digital microscope, the distance between die and crowns was measured at the occlusal and axial walls. The horizontal/vertical fit at the finishing line of each section were measured as well. RESULTS: For the marginal fit, the analysis shows that the influence of material and design was significant on horizontal and vertical margins, and the influence of finish was significant with horizontal but not vertical margins (p=0.09). For the internal fit, the analysis showed that the axial gap was significantly influenced by material and finish but not by design (p=0.44). CONCLUSIONS: With a few exceptions, horizontal and vertical marginal discrepancies were below 100 µm. Additional firing increased the discrepancies.
[Mh] Termos MeSH primário: Cerâmica
Coroas
Materiais Dentários
Porcelana Dentária
Ajuste de Prótese/métodos
[Mh] Termos MeSH secundário: Planejamento de Prótese Dentária
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Dental Materials); 0 (lithia disilicate); 12001-21-7 (Dental Porcelain)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:171129
[St] Status:MEDLINE
[do] DOI:10.1922/EJPRD_01735Abdulhameed08


  7 / 14299 MEDLINE  
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[PMID]:28449757
[Au] Autor:Brignardello-Petersen R
[Ti] Título:No evidence of an association between an allergy to dental materials and dental hygiene products and symptomatic oral lesions.
[So] Source:J Am Dent Assoc;148(5):e53, 2017 05.
[Is] ISSN:1943-4723
[Cp] País de publicação:England
[La] Idioma:eng
[Mh] Termos MeSH primário: Materiais Dentários
Higiene Bucal
[Mh] Termos MeSH secundário: Seres Humanos
Hipersensibilidade
Úlceras Orais
[Pt] Tipo de publicação:REVIEW; COMMENT
[Nm] Nome de substância:
0 (Dental Materials)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE


  8 / 14299 MEDLINE  
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[PMID]:29292414
[Au] Autor:Schwindling FS; Rammelsberg P; Krisam J; Rues S
[Ti] Título:Adjustment of retention of all-ceramic double-crown attachments.
[So] Source:Int J Comput Dent;20(4):409-421, 2017.
[Is] ISSN:1463-4201
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: Double-crown attachments, such as conical crowns (CCs), can retain removable partial prostheses. Digital manufacturing enables the use of innovative materials such as zirconia, and new workflows. The aim of this study was to investigate options for the adjustment of retention forces of all-zirconia CCs. MATERIALS AND METHODS: Single zirconia primary crowns were produced with convergence angles (α) of 3 and 4 degrees, together with monolithic zirconia secondary crowns (n = 8 for α = 3 degrees; n = 8 for α = 4 degrees). Retention was measured by fitting the crowns with forces F = 12.5 to 100 N, and evaluating the magnitudes of the forces required for loosening (L). L/F ratios were recorded, and the coefficient of friction (µ0) was calculated. To limit the maximum force required for loosening, and to prevent high tensile stresses within the crowns, the width of the occlusal gap between the primary and secondary crowns was limited by the implementation of occlusal stops. RESULTS: True convergence angles were more conical than expected, by approximately 0.3 degrees. For α = 3 degrees and α = 4 degrees, L/F ratios were 0.308 (SD 0.04) and 0.208 (SD 0.068), respectively. The overall coefficient of static friction was µ0 = 0.113. Maximum retention forces were successfully controlled; the average values were 12.1 N (SD 4.5 N) for zirconia occlusal stops, and 12.8 N (SD 3.3 N) for composite occlusal stops. CONCLUSION: The clinically desired L/F ratio of 1/3 was achieved by selecting 3-degree burs for fabrication of all-zirconia CCs. It is possible to limit retention, thereby reducing tensile stress in the circumferential direction in secondary crowns.
[Mh] Termos MeSH primário: Coroas
Materiais Dentários
Planejamento de Prótese Dentária
Retenção em Prótese Dentária
Zircônio
[Mh] Termos MeSH secundário: Análise do Estresse Dentário
Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Dental Materials); C6V6S92N3C (Zirconium); S38N85C5G0 (zirconium oxide)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:180103
[St] Status:MEDLINE


  9 / 14299 MEDLINE  
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[PMID]:29370163
[Au] Autor:Loison-Robert LS; Tassin M; Bonte E; Berbar T; Isaac J; Berdal A; Simon S; Fournier BPJ
[Ad] Endereço:School of Dentistry, Paris Descartes University, Sorbonne Paris Cité, Paris, France.
[Ti] Título:In vitro effects of two silicate-based materials, Biodentine and BioRoot RCS, on dental pulp stem cells in models of reactionary and reparative dentinogenesis.
[So] Source:PLoS One;13(1):e0190014, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Calcium silicate-based cements are biomaterials with calcium oxide and carbonate filler additives. Their properties are close to those of dentin, making them useful in restorative dentistry and endodontics. The aim of this study was to evaluate the in vitro biological effects of two such calcium silicate cements, Biodentine (BD) and Bioroot (BR), on dental stem cells in both direct and indirect contact models. The two models used aimed to mimic reparative dentin formation (direct contact) and reactionary dentin formation (indirect contact). An original aspect of this study is the use of an interposed thin agarose gel layer to assess the effects of diffusible components from the materials. RESULTS: The two biomaterials were compared and did not modify dental pulp stem cell (DPSC) proliferation. BD and BR showed no significant cytotoxicity, although some cell death occurred in direct contact. No apoptosis or inflammation induction was detected. A striking increase of mineralization induction was observed in the presence of BD and BR, and this effect was greater in direct contact. Surprisingly, biomineralization occurred even in the absence of mineralization medium. This differentiation was accompanied by expression of odontoblast-associated genes. Exposure by indirect contact did not stimulate the induction to such a level. CONCLUSION: These two biomaterials both seem to be bioactive and biocompatible, preserving DPSC proliferation, migration and adhesion. The observed strong mineralization induction through direct contact highlights the potential of these biomaterials for clinical application in dentin-pulp complex regeneration.
[Mh] Termos MeSH primário: Materiais Dentários
Polpa Dentária/efeitos dos fármacos
Dentina/efeitos dos fármacos
Silicatos/farmacologia
Células-Tronco/efeitos dos fármacos
[Mh] Termos MeSH secundário: Materiais Biocompatíveis
Proliferação Celular/efeitos dos fármacos
Citoesqueleto/efeitos dos fármacos
Polpa Dentária/citologia
Polpa Dentária/metabolismo
Matriz Extracelular/efeitos dos fármacos
Seres Humanos
Concentração de Íons de Hidrogênio
Técnicas In Vitro
Microscopia Eletrônica de Varredura
Modelos Biológicos
Estresse Oxidativo/efeitos dos fármacos
RNA Mensageiro/metabolismo
Reação em Cadeia da Polimerase em Tempo Real
Células-Tronco/citologia
Células-Tronco/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Biocompatible Materials); 0 (Dental Materials); 0 (RNA, Messenger); 0 (Silicates)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180126
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190014


  10 / 14299 MEDLINE  
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[PMID]:29293633
[Au] Autor:García-Sanz V; Paredes-Gallardo V; Mendoza-Yero O; Carbonell-Leal M; Albaladejo A; Montiel-Company JM; Bellot-Arcís C
[Ad] Endereço:Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain.
[Ti] Título:The effects of lasers on bond strength to ceramic materials: A systematic review and meta-analysis.
[So] Source:PLoS One;13(1):e0190736, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Lasers have recently been introduced as an alternative means of conditioning dental ceramic surfaces in order to enhance their adhesive strength to cements and other materials. The present systematic review and meta-analysis aimed to review and quantitatively analyze the available literature in order to determine which bond protocols and laser types are the most effective. A search was conducted in the Pubmed, Embase and Scopus databases for papers published up to April 2017. PRISMA guidelines for systematic review and meta-analysis were followed. Fifty-two papers were eligible for inclusion in the review. Twenty-five studies were synthesized quantitatively. Lasers were found to increase bond strength of ceramic surfaces to resin cements and composites when compared with control specimens (p-value < 0.01), whereas no significant differences were found in comparison with air-particle abraded surfaces. High variability can be observed in adhesion values between different analyses, pointing to a need to standardize study protocols and to determine the optimal parameters for each laser type.
[Mh] Termos MeSH primário: Cerâmica
Materiais Dentários
Lasers
Teste de Materiais
[Pt] Tipo de publicação:JOURNAL ARTICLE; META-ANALYSIS; REVIEW
[Nm] Nome de substância:
0 (Dental Materials)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180103
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190736



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