title: Factors affecting the bond strength of denture base and reline acrylic resins to base metal materials.
abstract: OBJECTIVE
  The shear bond strengths of two hard chairside reline resin materials and an auto-polymerizing denture base resin material to cast Ti and a Co-Cr alloy treated using four conditioning methods were investigated.
  
  
  METHODS
  Disk specimens (diameter 10 mm and thickness 2.5 mm) were cast from pure Ti and Co-Cr alloy. The specimens were wet-ground to a final surface finish of 600 grit, air-dried, and treated with the following bonding systems: 1) air-abraded with 50-70-µm grain alumina (CON); 2) 1) + conditioned with a primer, including an acidic phosphonoacetate monomer (MHPA); 3) 1) + conditioned with a primer including a diphosphate monomer (MDP); 4) treated with a tribochemical system. Three resin materials were applied to each metal specimen. Shear bond strengths were determined before and after 10,000 thermocycles.
  
  
  RESULTS
  The strengths decreased after thermocycling for all combinations. Among the resin materials assessed, the denture base material showed significantly (p<0.05) greater shear bond strengths than the two reline materials, except for the CON condition. After 10,000 thermocycles, the bond strengths of two reline materials decreased to less than 10 MPa for both metals. The bond strengths of the denture base material with MDP were sufficient: 34.56 MPa for cast Ti and 38.30 for Co-Cr alloy.
  
  
  CONCLUSIONS
  Bonding of reline resin materials to metals assessed was clinically insufficient, regardless of metal type, surface treatment, and resin composition. For the relining of metal denture frameworks, a denture base material should be used.
authors.affiliation: Division of Fixed Prosthodontics, Nagasaki University Hospital, Nagasaki, Japan.
authors.forename: Naomi
authors.initials: N
authors.lastname: Tanoue
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Matsuda
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Yanagida
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumura
authors.forename: Takashi
authors.initials: T
authors.lastname: Sawase
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000704:Analysis of Variance; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003819:Denture Bases; D003823:Denture Rebasing; D008422:Materials Testing; D058105:Polymerization; D033081:Shear Strength; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014025:Titanium / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D003722:Dental Alloys; D014025:Titanium
references.citation: Eur J Prosthodont Restor Dent. 2008 Jun;16(2):81-4
references.pmid: 18637384
references.citation: J Prosthet Dent. 2000 Jan;83(1):50-7
references.pmid: 10633022
references.citation: J Dent. 2006 Aug;34(7):436-43
references.pmid: 16310302
references.citation: Int J Prosthodont. 2000 May-Jun;13(3):205-8
references.pmid: 11203633
references.citation: J Oral Rehabil. 2002 Feb;29(2):121-6
references.pmid: 11856389
references.citation: Int J Prosthodont. 2010 May-Jun;23(3):246-8
references.pmid: 20552091
references.citation: Dent Mater J. 2011;30(2):143-50
references.pmid: 21383520
references.citation: J Oral Rehabil. 1999 Aug;26(8):631-4
references.pmid: 10447815
references.citation: Dent Mater. 2005 Mar;21(3):287-96
references.pmid: 15705436
references.citation: Dent Mater. 1995 Mar;11(2):82-6
references.pmid: 8621038
references.citation: Dent Mater. 2004 Nov;20(9):804-13
references.pmid: 15451235
references.citation: J Adhes Dent. 2010 Jun;12(3):223-9
references.pmid: 20157664
references.citation: J Prosthet Dent. 2006 Jul;96(1):59-67
references.pmid: 16872932
references.citation: J Prosthet Dent. 1996 Aug;76(2):194-9
references.pmid: 8820813
references.citation: Dent Mater. 2005 Dec;21(12):1087-97
references.pmid: 15878194
references.citation: J Dent. 2006 Feb;34(2):117-22
references.pmid: 15994000
references.citation: J Prosthet Dent. 2012 Feb;107(2):114-27
references.pmid: 22304746
references.citation: J Prosthet Dent. 1999 Oct;82(4):462-7
references.pmid: 10512967
references.citation: J Prosthet Dent. 1999 Mar;81(3):270-6
references.pmid: 10050113
references.citation: Dent Mater J. 2006 Mar;25(1):120-4
references.pmid: 16706306
references.citation: J Prosthodont Res. 2012 Jan;56(1):58-64
references.pmid: 21324770
references.citation: Gerodontology. 2012 Jun;29(2):e858-64
references.pmid: 22103841
references.citation: Gerodontology. 2010 Jun;27(2):147-53
references.pmid: 19508322
references.citation: Int J Prosthodont. 1999 Mar-Apr;12(2):129-34
references.pmid: 10371914
references.citation: Dent Mater. 2007 Feb;23(2):193-7
references.pmid: 16490245
references.citation: Dent Mater. 2006 Jun;22(6):545-52
references.pmid: 16221488