<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Holderegger C</dc:creator>
  <dc:creator>Sailer I</dc:creator>
  <dc:creator>Schuhmacher C</dc:creator>
  <dc:creator>Schläpfer R</dc:creator>
  <dc:creator>Hämmerle C</dc:creator>
  <dc:creator>Fischer J</dc:creator>
  <dc:date>2008</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">OBJECTIVES
The objectives of this in vitro study were (1) to assess the bond strength of the universal cement RelyX Unicem to dentin and to compare it with three conventional resin cements, (2) to test the influence of aging on their bonding capacity and (3) to test the influence of the operator on bonding quality by performing the same test in two different centers.


METHODS
160 third molars, divided into 80 for tests at the University of Zurich (Z) and 80 for tests at the University of Berne (B), were assigned to 2 x 8 subgroups of 10 teeth each. The specimens were prepared with the corresponding bonding agents and acrylic rods were luted either with RelyX Unicem (U), RelyX ARC (A), Multilink (M) or Panavia 21 (P). All specimens were stored in water for 24h (W) and half of the specimens were subjected to 1500 cycles of thermocycling (5 degrees C and 55 degrees C) (T). Bond strength was measured by means of a shear test.


RESULTS
After water storage RelyX Unicem exhibited lowest bond strength (UWZ: 9.2+/-1.6 MPa, UWB: 9.9+/-1.2 MPa, AWZ: 15.3+/-6.0 MPa, AWB: 12.2+/-4.3 MPa, MWZ: 15.6+/-3.3 MPa, MWB: 12.4 MPa+/-2.4, PWZ: 13.4+/-2.9 MPa, PWB: 14.9+/-2.6 MPa). Thermocycling affected the bonding performance of all four cements. However, bond strength of RelyX Unicem was least influenced by thermocycling (UTZ: 9.4+/-2.9 MPa, UTB: 8.6+/-1.3 MPa, ATZ: 11.4+/-6.3 MPa, ATB: 13.3+/-3.7 MPa, MTZ: 15.4+/-3.1 MPa, MTB: 10.3+/-2.4 MPa, PTZ: 11.1+/-2.8 MPa, PTB: 11.3+/-2.8 MPa).


SIGNIFICANCE
Although the bond strength of RelyX Unicem to dentin was lower in comparison to RelyX ARC, Multilink and Panavia 21, its bond strength was less sensitive to variations in handling and aging.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>https://sonar.ch/global/documents/4335</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dental.2007.11.021</dc:relation>
  <dc:relation>info:eu-repo/semantics/altIdentifier/pmid/18190957</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:source>Dental materials : official publication of the Academy of Dental Materials. - 2008</dc:source>
  <dc:subject xmlns:ns1="xml" ns1:lang="en">Acrylic Resins</dc:subject>
  <dc:subject xmlns:ns2="xml" ns2:lang="en">Bisphenol A-Glycidyl Methacrylate</dc:subject>
  <dc:subject xmlns:ns3="xml" ns3:lang="en">Dental Bonding</dc:subject>
  <dc:subject xmlns:ns4="xml" ns4:lang="en">Dentin</dc:subject>
  <dc:subject xmlns:ns5="xml" ns5:lang="en">Humans</dc:subject>
  <dc:subject xmlns:ns6="xml" ns6:lang="en">Materials Testing</dc:subject>
  <dc:subject xmlns:ns7="xml" ns7:lang="en">Phosphates</dc:subject>
  <dc:subject xmlns:ns8="xml" ns8:lang="en">Polyethylene Glycols</dc:subject>
  <dc:subject xmlns:ns9="xml" ns9:lang="en">Polymethacrylic Acids</dc:subject>
  <dc:subject xmlns:ns10="xml" ns10:lang="en">Resin Cements</dc:subject>
  <dc:subject xmlns:ns11="xml" ns11:lang="en">Shear Strength</dc:subject>
  <dc:subject xmlns:ns12="xml" ns12:lang="en">Stress, Mechanical</dc:subject>
  <dc:subject xmlns:ns13="xml" ns13:lang="en">Temperature</dc:subject>
  <dc:subject xmlns:ns14="xml" ns14:lang="en">Time Factors</dc:subject>
  <dc:subject xmlns:ns15="xml" ns15:lang="en">Water</dc:subject>
  <dc:title xmlns:ns16="xml" ns16:lang="en">Shear bond strength of resin cements to human dentin.</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>