Sorption, solubility, shrinkage and mechanical properties of "low-shrinkage" commercial resin composites

Letícia C. Boaro, Flávia Gonçalves, Thayse C. Guimarães, Jack Ferracane, Carmem Pfeifer, Roberto R. Braga

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Objective: This study determined the volumetric shrinkage, degree of conversion, sorption, solubility, and flexure properties (before and after aging) of commercial dental composites identified as "low shrinkage". Methods: Six Bis-GMA-based composites (Point 4, ELS, Filtek Supreme, Aelite LS Posterior, Filtek Z250 and Heliomolar), a silorane-based (Filtek LS) and a dimer dicarbamate dimethacrylate-based composite (N'Durance) were studied. Total shrinkage was measured in a mercury dilatometer (n = 3). Elastic modulus and flexural strength was determined by the three point bending test before and after 4 months aging in 75% ethanol solution (n = 10). Sorption and solubility in water was assessed according to ISO 4049. Additionally, composite degree of conversion was determined using near-IR spectroscopy (n = 3). Data were analysed using one-way/two-way ANOVA or Kruskal-Wallis, and Tukey's test. Student's t-test was used to compare storage periods (α = 0.05). Results: The volumetric shrinkage values ranged between 1.5% (Filtek LS) and 3.4% (Point 4). The materials presented different behaviors regarding aging in ethanol, as evidenced by the large range in values of percentage reduction for elastic modulus (26-75%) and flexural strength (25-86%). Sorption values ranged from 8.2 μg/mm3 (Aelite LS Posterior) to 38.2 μg/mm3 (Point 4). Solubility values ranged from -1.5 μg/mm3 (Filtek LS) to 5.7 μg/mm3 (Aelite LS Posterior). The degree of conversion values at 10 min ranged between 28% (Filtek LS) and 73% (Point 4). At 72 h after curing the values ranged between 39% (Filtek LS) and 83% (Point 4). Significance: Among the materials identified by their manufacturers as "low shrinkage", only Filtek LS presented statistically lower values of shrinkage compared to composites based on conventional dimethacrylates, but lower degree of conversion as well. Overall materials with higher filler content presented higher initial values of flexural properties. However, their resistance to ethanol degradation seems to be influenced by different compositional factors and, therefore, cannot be directly related to water sorption results.

Original languageEnglish (US)
Pages (from-to)398-404
Number of pages7
JournalDental Materials
Volume29
Issue number4
DOIs
StatePublished - Apr 2013

Fingerprint

Composite Resins
Solubility
Sorption
Ethanol
Resins
Elastic Modulus
Mechanical properties
Composite materials
Bisphenol A-Glycidyl Methacrylate
Water
Aging of materials
Mercury
Bending strength
Silorane Resins
Spectrum Analysis
Analysis of Variance
Tooth
Elastic moduli
Dental composites
Students

Keywords

  • Degree of conversion
  • Low shrinkage composites
  • Mechanical properties
  • Sorption

ASJC Scopus subject areas

  • Dentistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Medicine(all)

Cite this

Sorption, solubility, shrinkage and mechanical properties of "low-shrinkage" commercial resin composites. / Boaro, Letícia C.; Gonçalves, Flávia; Guimarães, Thayse C.; Ferracane, Jack; Pfeifer, Carmem; Braga, Roberto R.

In: Dental Materials, Vol. 29, No. 4, 04.2013, p. 398-404.

Research output: Contribution to journalArticle

Boaro, Letícia C. ; Gonçalves, Flávia ; Guimarães, Thayse C. ; Ferracane, Jack ; Pfeifer, Carmem ; Braga, Roberto R. / Sorption, solubility, shrinkage and mechanical properties of "low-shrinkage" commercial resin composites. In: Dental Materials. 2013 ; Vol. 29, No. 4. pp. 398-404.
@article{9272ca1c04cf460daea96d303688de59,
title = "Sorption, solubility, shrinkage and mechanical properties of {"}low-shrinkage{"} commercial resin composites",
abstract = "Objective: This study determined the volumetric shrinkage, degree of conversion, sorption, solubility, and flexure properties (before and after aging) of commercial dental composites identified as {"}low shrinkage{"}. Methods: Six Bis-GMA-based composites (Point 4, ELS, Filtek Supreme, Aelite LS Posterior, Filtek Z250 and Heliomolar), a silorane-based (Filtek LS) and a dimer dicarbamate dimethacrylate-based composite (N'Durance) were studied. Total shrinkage was measured in a mercury dilatometer (n = 3). Elastic modulus and flexural strength was determined by the three point bending test before and after 4 months aging in 75{\%} ethanol solution (n = 10). Sorption and solubility in water was assessed according to ISO 4049. Additionally, composite degree of conversion was determined using near-IR spectroscopy (n = 3). Data were analysed using one-way/two-way ANOVA or Kruskal-Wallis, and Tukey's test. Student's t-test was used to compare storage periods (α = 0.05). Results: The volumetric shrinkage values ranged between 1.5{\%} (Filtek LS) and 3.4{\%} (Point 4). The materials presented different behaviors regarding aging in ethanol, as evidenced by the large range in values of percentage reduction for elastic modulus (26-75{\%}) and flexural strength (25-86{\%}). Sorption values ranged from 8.2 μg/mm3 (Aelite LS Posterior) to 38.2 μg/mm3 (Point 4). Solubility values ranged from -1.5 μg/mm3 (Filtek LS) to 5.7 μg/mm3 (Aelite LS Posterior). The degree of conversion values at 10 min ranged between 28{\%} (Filtek LS) and 73{\%} (Point 4). At 72 h after curing the values ranged between 39{\%} (Filtek LS) and 83{\%} (Point 4). Significance: Among the materials identified by their manufacturers as {"}low shrinkage{"}, only Filtek LS presented statistically lower values of shrinkage compared to composites based on conventional dimethacrylates, but lower degree of conversion as well. Overall materials with higher filler content presented higher initial values of flexural properties. However, their resistance to ethanol degradation seems to be influenced by different compositional factors and, therefore, cannot be directly related to water sorption results.",
keywords = "Degree of conversion, Low shrinkage composites, Mechanical properties, Sorption",
author = "Boaro, {Let{\'i}cia C.} and Fl{\'a}via Gon{\cc}alves and Guimar{\~a}es, {Thayse C.} and Jack Ferracane and Carmem Pfeifer and Braga, {Roberto R.}",
year = "2013",
month = "4",
doi = "10.1016/j.dental.2013.01.006",
language = "English (US)",
volume = "29",
pages = "398--404",
journal = "Dental Materials",
issn = "0109-5641",
publisher = "Elsevier Science",
number = "4",

}

TY - JOUR

T1 - Sorption, solubility, shrinkage and mechanical properties of "low-shrinkage" commercial resin composites

AU - Boaro, Letícia C.

AU - Gonçalves, Flávia

AU - Guimarães, Thayse C.

AU - Ferracane, Jack

AU - Pfeifer, Carmem

AU - Braga, Roberto R.

PY - 2013/4

Y1 - 2013/4

N2 - Objective: This study determined the volumetric shrinkage, degree of conversion, sorption, solubility, and flexure properties (before and after aging) of commercial dental composites identified as "low shrinkage". Methods: Six Bis-GMA-based composites (Point 4, ELS, Filtek Supreme, Aelite LS Posterior, Filtek Z250 and Heliomolar), a silorane-based (Filtek LS) and a dimer dicarbamate dimethacrylate-based composite (N'Durance) were studied. Total shrinkage was measured in a mercury dilatometer (n = 3). Elastic modulus and flexural strength was determined by the three point bending test before and after 4 months aging in 75% ethanol solution (n = 10). Sorption and solubility in water was assessed according to ISO 4049. Additionally, composite degree of conversion was determined using near-IR spectroscopy (n = 3). Data were analysed using one-way/two-way ANOVA or Kruskal-Wallis, and Tukey's test. Student's t-test was used to compare storage periods (α = 0.05). Results: The volumetric shrinkage values ranged between 1.5% (Filtek LS) and 3.4% (Point 4). The materials presented different behaviors regarding aging in ethanol, as evidenced by the large range in values of percentage reduction for elastic modulus (26-75%) and flexural strength (25-86%). Sorption values ranged from 8.2 μg/mm3 (Aelite LS Posterior) to 38.2 μg/mm3 (Point 4). Solubility values ranged from -1.5 μg/mm3 (Filtek LS) to 5.7 μg/mm3 (Aelite LS Posterior). The degree of conversion values at 10 min ranged between 28% (Filtek LS) and 73% (Point 4). At 72 h after curing the values ranged between 39% (Filtek LS) and 83% (Point 4). Significance: Among the materials identified by their manufacturers as "low shrinkage", only Filtek LS presented statistically lower values of shrinkage compared to composites based on conventional dimethacrylates, but lower degree of conversion as well. Overall materials with higher filler content presented higher initial values of flexural properties. However, their resistance to ethanol degradation seems to be influenced by different compositional factors and, therefore, cannot be directly related to water sorption results.

AB - Objective: This study determined the volumetric shrinkage, degree of conversion, sorption, solubility, and flexure properties (before and after aging) of commercial dental composites identified as "low shrinkage". Methods: Six Bis-GMA-based composites (Point 4, ELS, Filtek Supreme, Aelite LS Posterior, Filtek Z250 and Heliomolar), a silorane-based (Filtek LS) and a dimer dicarbamate dimethacrylate-based composite (N'Durance) were studied. Total shrinkage was measured in a mercury dilatometer (n = 3). Elastic modulus and flexural strength was determined by the three point bending test before and after 4 months aging in 75% ethanol solution (n = 10). Sorption and solubility in water was assessed according to ISO 4049. Additionally, composite degree of conversion was determined using near-IR spectroscopy (n = 3). Data were analysed using one-way/two-way ANOVA or Kruskal-Wallis, and Tukey's test. Student's t-test was used to compare storage periods (α = 0.05). Results: The volumetric shrinkage values ranged between 1.5% (Filtek LS) and 3.4% (Point 4). The materials presented different behaviors regarding aging in ethanol, as evidenced by the large range in values of percentage reduction for elastic modulus (26-75%) and flexural strength (25-86%). Sorption values ranged from 8.2 μg/mm3 (Aelite LS Posterior) to 38.2 μg/mm3 (Point 4). Solubility values ranged from -1.5 μg/mm3 (Filtek LS) to 5.7 μg/mm3 (Aelite LS Posterior). The degree of conversion values at 10 min ranged between 28% (Filtek LS) and 73% (Point 4). At 72 h after curing the values ranged between 39% (Filtek LS) and 83% (Point 4). Significance: Among the materials identified by their manufacturers as "low shrinkage", only Filtek LS presented statistically lower values of shrinkage compared to composites based on conventional dimethacrylates, but lower degree of conversion as well. Overall materials with higher filler content presented higher initial values of flexural properties. However, their resistance to ethanol degradation seems to be influenced by different compositional factors and, therefore, cannot be directly related to water sorption results.

KW - Degree of conversion

KW - Low shrinkage composites

KW - Mechanical properties

KW - Sorption

UR - http://www.scopus.com/inward/record.url?scp=84875229112&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875229112&partnerID=8YFLogxK

U2 - 10.1016/j.dental.2013.01.006

DO - 10.1016/j.dental.2013.01.006

M3 - Article

VL - 29

SP - 398

EP - 404

JO - Dental Materials

JF - Dental Materials

SN - 0109-5641

IS - 4

ER -