Shear-bond strength between a new format of intra-buccal acrylic bioadhesive drug delivery system and adhesive systems.
OBJECTIVE
An intra-buccal acrylic bioadhesive device designated for drug programmed release that can stay adhered to dental enamel, and also on removable prosthetic restorations, with preventive and/or therapeutic purpose for a large clinical applications based on polymethyl methacrylate/methyl methacrylate/2 hydroxyethyl methacrylate (PMMA/MMA/HEMA) was developed, using the sodium fluoride as an active principle. This bioadhesive was evaluated for its shear bond strength when bonded with different adhesive systems.


METHODS
Two substrates (recently extracted human teeth and acrylic prosthesis basis) were used to obtain the 96 test-specimens. Four adhesive systems (Cyanoacrylate ester, 3M Concise Enamel Bond Resin with or without previous enamel etching, MMA/HEMA or PMMA/MMA/ HEMA) were chosen for the fixation of the bioadhesives to substrate. Artificial saliva or distilled water was used as medium for maintaining the specimens until test.


RESULTS
Statistical analysis showed that the interaction bioadhesives/acrylic prosthesis basis/cyanoacrylate ester adhesive was the most resistant to the physical removal by shearing.


CONCLUSIONS
The newly rounded semi-convex format of acrylic device developed in this study presented satisfactory shear bond strength and might contribute to the comfort of intra-buccal use.
Pedrazzi
V
V
Department of Dental Materials and Prosthodontics, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil. pedrazzi@forp.usp.br
Del Ciampo
J O
JO
Panzeri
H
H
Lara
E Helena Guimarães
EH
Issa
J P Mardegan
JP
Do Nascimento
C
C
D001672:Biocompatible Materials / Q000008:administration & dosage*; D003738:Dental Cements; D017266:Dental Prosthesis; D016503:Drug Delivery Systems; D006801:Humans; D033081:Shear Strength; D014070:Tooth
D001672:Biocompatible Materials; D003738:Dental Cements