R R Braga

Summary

Country: Brazil

Publications

  1. doi request reprint A critical view on biaxial and short-beam uniaxial flexural strength tests applied to resin composites using Weibull, fractographic and finite element analyses
    Barbara Pick
    Department of Dental Materials, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Cidade Universitaria, 05508 000 Sao Paulo, SP, Brazil
    Dent Mater 26:83-90. 2010
  2. doi request reprint Composite polymerization stress as a function of specimen configuration assessed by crack analysis and finite element analysis
    Roberto R Braga
    Department of Biomaterials and Oral Biology, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 000, Brazil Electronic address
    Dent Mater 29:1026-33. 2013
  3. doi request reprint A comparative study between crack analysis and a mechanical test for assessing the polymerization stress of restorative composites
    Roberto R Braga
    Department of Dental Materials, University of Sao Paulo School of Dentistry, Sao Paulo, SP, Brazil
    Dent Mater 28:632-41. 2012
  4. doi request reprint Adhesion to tooth structure: a critical review of "macro" test methods
    Roberto R Braga
    University of Sao Paulo School of Dentistry, Dept of Dental Materials, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 000, Brazil
    Dent Mater 26:e38-49. 2010
  5. ncbi request reprint Influence of cavity dimensions and their derivatives (volume and 'C' factor) on shrinkage stress development and microleakage of composite restorations
    Roberto R Braga
    Department of Dental Materials, FOUSP, Av Prof Lineu Prestes, 2227, University of Sao Paulo, School of Dentistry, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 22:818-23. 2006
  6. ncbi request reprint Factors involved in the development of polymerization shrinkage stress in resin-composites: a systematic review
    Roberto R Braga
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 21:962-70. 2005
  7. ncbi request reprint Polymerization contraction stress in dual-cure cements and its effect on interfacial integrity of bonded inlays
    Roberto R Braga
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 00508 900, Brazil
    J Dent 30:333-40. 2002
  8. ncbi request reprint Contraction stress of flowable composite materials and their efficacy as stress-relieving layers
    Roberto R Braga
    Depto de Materiais Dentarios da FOUSP, Sao Paulo, SP, Brazil
    J Am Dent Assoc 134:721-8. 2003
  9. ncbi request reprint Alternatives in polymerization contraction stress management
    R R Braga
    University of Sao Paulo, School of Dentistry, Department of Dental Materials, São Paulo SP 05508 900, Brazil
    Crit Rev Oral Biol Med 15:176-84. 2004
  10. ncbi request reprint Influence of time and adhesive system on the extrusion shear strength between feldspathic porcelain and bovine dentin
    R R Braga
    Department of Dental Materials, University of Sao Paulo, School of Dentistry, Sao Paulo, Brazil
    Dent Mater 16:303-10. 2000

Collaborators

Detail Information

Publications40

  1. doi request reprint A critical view on biaxial and short-beam uniaxial flexural strength tests applied to resin composites using Weibull, fractographic and finite element analyses
    Barbara Pick
    Department of Dental Materials, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Cidade Universitaria, 05508 000 Sao Paulo, SP, Brazil
    Dent Mater 26:83-90. 2010
    ..To evaluate the biaxial and short-beam uniaxial strength tests applied to resin composites based upon their Weibull parameters, fractographic features and stress distribution...
  2. doi request reprint Composite polymerization stress as a function of specimen configuration assessed by crack analysis and finite element analysis
    Roberto R Braga
    Department of Biomaterials and Oral Biology, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 000, Brazil Electronic address
    Dent Mater 29:1026-33. 2013
    ..To test the null hypothesis that polymerization-induced stress was not influenced by cavity dimensions and geometries...
  3. doi request reprint A comparative study between crack analysis and a mechanical test for assessing the polymerization stress of restorative composites
    Roberto R Braga
    Department of Dental Materials, University of Sao Paulo School of Dentistry, Sao Paulo, SP, Brazil
    Dent Mater 28:632-41. 2012
    ..Also, both tests would show similar relationships between stress and composite elastic modulus and/or shrinkage...
  4. doi request reprint Adhesion to tooth structure: a critical review of "macro" test methods
    Roberto R Braga
    University of Sao Paulo School of Dentistry, Dept of Dental Materials, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 000, Brazil
    Dent Mater 26:e38-49. 2010
    ..This review focuses on aspects related to specimen geometry and test mechanics of "macro" shear and tensile bond strength tests...
  5. ncbi request reprint Influence of cavity dimensions and their derivatives (volume and 'C' factor) on shrinkage stress development and microleakage of composite restorations
    Roberto R Braga
    Department of Dental Materials, FOUSP, Av Prof Lineu Prestes, 2227, University of Sao Paulo, School of Dentistry, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 22:818-23. 2006
    ..To determine, in vitro, the influence of cavity dimensions on shrinkage stress development and microleakage of composite restorations...
  6. ncbi request reprint Factors involved in the development of polymerization shrinkage stress in resin-composites: a systematic review
    Roberto R Braga
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 21:962-70. 2005
    ..The purpose of this systematic review is to discuss the primary factors involved with polymerization shrinkage stress development...
  7. ncbi request reprint Polymerization contraction stress in dual-cure cements and its effect on interfacial integrity of bonded inlays
    Roberto R Braga
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 00508 900, Brazil
    J Dent 30:333-40. 2002
    ..To compare the polymerization contraction stress of resin cements in dual-cure and self-cure modes, and verify its effect on microleakage and gap formation in class I cavities restored with porcelain inlays...
  8. ncbi request reprint Contraction stress of flowable composite materials and their efficacy as stress-relieving layers
    Roberto R Braga
    Depto de Materiais Dentarios da FOUSP, Sao Paulo, SP, Brazil
    J Am Dent Assoc 134:721-8. 2003
    ..They also measured the stress reduction produced by placing a precured layer of flowable composite under a nonflowable composite...
  9. ncbi request reprint Alternatives in polymerization contraction stress management
    R R Braga
    University of Sao Paulo, School of Dentistry, Department of Dental Materials, São Paulo SP 05508 900, Brazil
    Crit Rev Oral Biol Med 15:176-84. 2004
    ..Moreover, studies with experimental dimethacrylate-based composites and recent developments in low-shrinkage monomers are described...
  10. ncbi request reprint Influence of time and adhesive system on the extrusion shear strength between feldspathic porcelain and bovine dentin
    R R Braga
    Department of Dental Materials, University of Sao Paulo, School of Dentistry, Sao Paulo, Brazil
    Dent Mater 16:303-10. 2000
    ..This study evaluated the extrusion shear strength of the bond between feldsphatic porcelain and bovine dentin at different time intervals, using three adhesive systems based on dual-cure cements and one based on a self-cure cement...
  11. ncbi request reprint Tensile bond strength of filled and unfilled adhesives to dentin
    R R Braga
    Department of Dental Materials, University of Sao Paulo, SP, Brazil
    Am J Dent 13:73-6. 2000
    ..To determine the tensile bond strength of three filled and two unfilled adhesives applied to bovine dentin...
  12. ncbi request reprint Contraction stress determinants in dimethacrylate composites
    F Goncalves
    Dept of Biomaterials and Oral Biochemistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, 05508 000 Sao Paulo, SP, Brazil
    J Dent Res 87:367-71. 2008
    ..We used linear regressions to evaluate the association between polymerization stress and conversion (R(2)=0.905), shrinkage (R(2)=0.825), and modulus (R(2)=0.623)...
  13. doi request reprint Contraction stress related to composite inorganic content
    F Goncalves
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, SP, Brazil
    Dent Mater 26:704-9. 2010
    ..The aim of this investigation was to evaluate the influence of inorganic fraction on polymerization stress and its determinants, namely, volumetric shrinkage, elastic modulus and degree of conversion...
  14. ncbi request reprint Mechanical properties of resin cements with different activation modes
    R R Braga
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
    J Oral Rehabil 29:257-62. 2002
    ..g. filler content and monomer type) affect the flexural strength of composites. No statistical difference was detected in the flexural modulus among the different groups...
  15. pmc Ethanol wet-bonding challenges current anti-degradation strategy
    F T Sadek
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, SP, Brazil
    J Dent Res 89:1499-504. 2010
    ..The results led to rejection of the null hypothesis and highlight the concept of biomimetic water replacement from the collagen intrafibrillar compartments as the ultimate goal in extending the longevity of resin-dentin bonds...
  16. ncbi request reprint Influence of shade and storage time on the flexural strength, flexural modulus, and hardness of composites used for indirect restorations
    P F Cesar
    Department of Dental Materials, Faculty of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
    J Prosthet Dent 86:289-96. 2001
    ..Composite systems developed specifically for indirect application are said to have enhanced mechanical properties due to their elevated monomer conversion...
  17. doi request reprint Six-month evaluation of adhesives interface created by a hydrophobic adhesive to acid-etched ethanol-wet bonded dentine with simplified dehydration protocols
    Fernanda T Sadek
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP, Brazil
    J Dent 38:276-83. 2010
    ....
  18. ncbi request reprint Composite shrinkage stress as a function of specimen dimensions and compliance of the testing system
    Marcelo F Witzel
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
    Dent Mater 23:204-10. 2007
    ..Stress distribution was evaluated using finite element analysis (FEA)...
  19. doi request reprint Polymerization stress, flow and dentine bond strength of two resin-based root canal sealers
    S F C Souza
    School of Dentistry, Federal University of Maranhao, São Luiz, MA 65085 580, Brazil
    Int Endod J 42:867-73. 2009
    ..To compare two resin-based root canal sealers (AH Plus and dual cure Epiphany) in terms of flow, polymerization stress and bond strength to dentine...
  20. ncbi request reprint Factors affecting photopolymerization stress in dental composites
    C S Pfeifer
    Department of Biomaterials and Oral Biochemistry, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227 São Paulo, SP, Brazil
    J Dent Res 87:1043-7. 2008
    ..The group with the highest stress/degree of conversion exhibited the lowest RP(max), so it can be assumed, within the limitations of this study, that the conversion was most closely related to stress development...
  21. ncbi request reprint Polymerization stress of resin composites as a function of system compliance
    Flávia Gonçalves
    University of Sao Paulo, Department Biomaterials and Oral Biochemistry, Sao Paulo, Brazil
    Dent Mater 24:645-52. 2008
    ..Evaluate the effect of testing system compliance on polymerization stress and stress distribution of composites...
  22. doi request reprint Influence of BisGMA, TEGDMA, and BisEMA contents on viscosity, conversion, and flexural strength of experimental resins and composites
    Flávia Gonçalves
    Department of Dental Materials, University of Sao Paulo, Sao Paulo, Brazil
    Eur J Oral Sci 117:442-6. 2009
    ..Partial or total replacement of TEGDMA by BisEMA increased eta, which was associated with the observed decreases in DC and FS. Although the BisGMA content influenced the DC, it did not affect the FS results...
  23. ncbi request reprint In vitro wear simulation measurements of composite versus resin-modified glass ionomer luting cements for all-ceramic restorations
    Roberto R Braga
    Department of Dental Materials, University of Sao Paulo, School of Dentistry, Sao Paulo, Brazil
    J Esthet Restor Dent 14:368-76. 2002
    ....
  24. ncbi request reprint Photoinitiator content in restorative composites: influence on degree of conversion, reaction kinetics, volumetric shrinkage and polymerization stress
    Carmem S Pfeifer
    Department of Biomaterials and Oral Biochemistry, School of Dentistry, University of Sao Paulo, Brazil
    Am J Dent 22:206-10. 2009
    ..To determine the influence of rate of polymerization, degree of conversion and volumetric shrinkage on stress development by varying the amount of photoinitiators in a model composite...
  25. doi request reprint Influence of irradiant energy on degree of conversion, polymerization rate and shrinkage stress in an experimental resin composite system
    Fernanda C Calheiros
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, FOUSP, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 24:1164-8. 2008
    ....
  26. doi request reprint Bis-GMA co-polymerizations: influence on conversion, flexural properties, fracture toughness and susceptibility to ethanol degradation of experimental composites
    Carmem S Pfeifer
    Biomaterials and Oral Biochemistry Department, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, 05508 900, SP, Brazil
    Dent Mater 25:1136-41. 2009
    ....
  27. doi request reprint One-year stability of resin-dentin bonds created with a hydrophobic ethanol-wet bonding technique
    Fernanda T Sadek
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, SP, Brazil
    Dent Mater 26:380-6. 2010
    ..Dentin bonding performed with hydrophobic resins using ethanol-wet bonding should be less susceptible to degradation but this hypothesis has never been validated...
  28. ncbi request reprint Contraction stress related to degree of conversion and reaction kinetics
    R R Braga
    Department of Dental Materials, University of Sao Paulo, School of Dentistry, Sao Paulo, Brazil
    J Dent Res 81:114-8. 2002
    ..Degree of conversion showed a pronounced influence on stress. Increased inhibitor concentration reduced curing rate and contraction stress in composites, without compromising the final degree of conversion...
  29. ncbi request reprint Effect of photoactivation protocol and radiant exposure on monomer conversion and flexural strength of a resin composite after water and ethanol storage
    F Goncalves
    Department of Dental Materials, University of Sao Paulo, School of Dentistry, Av Prof Lineu Prestes, 2227, Sao Paulo, 05508 900, Brazil
    J Biomed Mater Res B Appl Biomater 82:89-92. 2007
    ....
  30. doi request reprint Understanding contradictory data in contraction stress tests
    J B C Meira
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227 São Paulo, SP 05508 000, Brazil
    J Dent Res 90:365-70. 2011
    ..However, if shrinkage and modulus were inversely related, their magnitudes and interaction with rod material determined the stress response...
  31. ncbi request reprint Degree of conversion and mechanical properties of a BisGMA:TEGDMA composite as a function of the applied radiant exposure
    Fernanda C Calheiros
    Department of Biomaterials and Oral Biochemistry, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
    J Biomed Mater Res B Appl Biomater 84:503-9. 2008
    ..Verify the influence of radiant exposure (H) on composite degree of conversion (DC) and mechanical properties...
  32. ncbi request reprint Correlation between microleakage and cement thickness in three Class II inlay ceramic systems
    W Romão
    Department of Dental Materials, University of Sao Paulo, Brazil
    Oper Dent 29:212-8. 2004
    ..No correlation was found between cement thickness and microleakage either in enamel or dentin for any of the ceramic systems...
  33. doi request reprint Influence of matrix composition on polymerization stress development of experimental composites
    Flávia Gonçalves
    Department of Dental Materials, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 26:697-703. 2010
    ....
  34. doi request reprint Influence of the bonding substrate in dental composite polymerization stress testing
    Letícia C Boaro
    University of Sao Paulo, Department of Dental Materials, School of Dentistry, Av Prof Lineu Prestes, Sao Paulo, SP, Brazil
    Acta Biomater 6:547-51. 2010
    ..24)(a); DU: 0.83(0.30)(B)/1.68(0.46)(a); HM: 0.81(0.27)(B)/1.64(0.54)(a). The tested hypothesis was confirmed, as the composites showed the same ordering both in the polymerization stress test using PMMA rods and in the microleakage test...
  35. doi request reprint Vertical root fracture in upper premolars with endodontic posts: finite element analysis
    Andrea F V Santos
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
    J Endod 35:117-20. 2009
    ..Tensile stress peaks for the nonbonded models were approximately three times higher than for the bonded or intact models, therefore confirming the second hypothesis...
  36. ncbi request reprint Influence of radiant exposure on contraction stress, degree of conversion and mechanical properties of resin composites
    Fernanda C Calheiros
    Department of Dental Materials, University of Sao Paulo, School of Dentistry, Av Professor Lineu Prestes, 2227, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 22:799-803. 2006
    ..To verify the influence of radiant exposure (H) on contraction stress (CS), degree of conversion (DC) and mechanical properties of two restorative composites...
  37. ncbi request reprint Influence of photoactivation method on conversion, mechanical properties, degradation in ethanol and contraction stress of resin-based materials
    Marcelo F Witzel
    Department of Dental Materials, School of Dentistry, Av Prof Lineu Prestes, 2227, Cidade Universitaria, Sao Paulo, Sao Paulo, SP, Brazil CEP 05508 000
    J Dent 33:773-9. 2005
    ....
  38. ncbi request reprint Relationship between contraction stress and degree of conversion in restorative composites
    Fernanda C Calheiros
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Av Prof Lineu Prestes, 2227, Sao Paulo, SP 05508 900, Brazil
    Dent Mater 20:939-46. 2004
    ..To verify the relationship between contraction stress and degree of conversion (DC) in different composites (Filtek Z250, Filtek A110, Tetric Ceram and Heliomolar)...
  39. ncbi request reprint Influence of local factors on composite shrinkage stress development--a finite element analysis
    Josete B C Meira
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, SP, Brazil
    J Adhes Dent 9:499-503. 2007
    ....
  40. ncbi request reprint The suitability of different FEA models for studying root fractures caused by wedge effect
    Josete B C Meira
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
    J Biomed Mater Res A 84:442-6. 2008
    ..In these models, sigma max)orientation did not represent a situation where vertical root fracture would occur due to wedge effect. Adhesion between post and dentin significantly reduced sigma max...