Bond Strength of Artificial Teeth Attached to a Microwave-Polymerized Denture Base Resin after Immersion in Disinfectant Solutions.
OBJECTIVE
To evaluate the bond strength between two types of acrylic resin teeth and a microwave denture base resin after immersion in disinfectant solutions for 180 days.


METHODS
Eighty specimens made of acrylic resin teeth (Biotone and Biotone IPN) attached to a microwave polymerized denture base resin (Nature-Cryl MC) were divided into eight groups (n = 10) according to the treatment (distilled water-control, 2% chlorhexidine digluconate, 1% sodium hypochlorite and sodium perborate solution-Corega Tabs). The shear strength tests (MPa) were carried out using a universal testing machine with a 0.5 mm/min speed. Data analysis was performed using ANOVA and multiple comparison Student-Newman-Keuls post hoc test (α = 0.05).


RESULTS
Biotone IPN showed similar results among the groups (distilled water, 8.25 ± 1.81 MPa; chlorhexidine, 7.81 ± 3.34 MPa; hypochlorite, 7.75 ± 3.72 MPa; and Corega Tabs, 7.58 ± 2.27 MPa, whereas Biotone showed significantly lower shear bond strength values for the groups immersed in Corega Tabs (5.25 ± 3.27 MPa) and chlorhexidine (6.08 ± 2.35 MPa).


CONCLUSIONS
Soaking the dentures in 1% sodium hypochlorite could be recommended as a disinfectant solution for dentures fabricated with conventional acrylic resin denture teeth and microwave denture base resin. For dentures fabricated with IPN teeth and microwave denture base resin, all the soaking solutions evaluated in this study could be suggested to denture wearers.
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Univ Estadual Paulista, Araraquara, Brazil. anacarolpero@foar.unesp.br.
Ana Carolina
AC
Pero
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Univ Estadual Paulista, Araraquara, Brazil.
Priscila Mattos
PM
Scavassin
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Univ Estadual Paulista, Araraquara, Brazil.
Élen Massaro
ÉM
Nunes
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Univ Estadual Paulista, Araraquara, Brazil.
Vivian Barnabé
VB
Policastro
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Univ Estadual Paulista, Araraquara, Brazil.
Gabriela
G
Giro
Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Univ Estadual Paulista, Araraquara, Brazil.
Marco Antonio
MA
Compagnoni
D000180:Acrylic Resins; D001840:Dental Bonding; D003819:Denture Bases; D004202:Disinfectants; D006801:Humans; D008422:Materials Testing; D008872:Microwaves; D013499:Surface Properties; D014093:Tooth, Artificial
D000180:Acrylic Resins; D004202:Disinfectants
Artificial tooth; denture bases; denture cleansers; shear strength