Surface and mechanical properties of adhesives with calcium phosphates challenged to different storage media
Braz. j. oral sci
;
19: e200181, jan.-dez. 2020. ilus
Artículo
en Inglés
| BBO, LILACS
| ID: biblio-1152205
ABSTRACT
Aim:
To evaluate the behavior of experimental dental adhesives with hydroxyapatite (HAp), alpha-tricalcium phosphate (α-TCP) or octacalcium phosphate (OCP) after storing them in three different media dry storage, distilled water, or lactic acid.Methods:
An experimental adhesive resin was formulated with bisphenol A glycol dimethacrylate, 2-hydroxyethyl methacrylate, and photoiniciator/co-initiator system. HAp(GHAp), α-TCP (Gα-TCP), or OCP (GOCP) were added to the adhesive resin at 2 wt.%, and one group remained without calcium phosphates to be used as a control (GCtrl). The adhesives were evaluated for surface roughness, scanning electron microscopy (SEM), and ultimate tensile strength (UTS) after storing in distilled water (pH=5.8), lactic acid (pH=4) or dry medium.Results:
The initial surface roughness was not different among groups (p>0.05). GHAp showed increased values after immersion in water (p<0.05) or lactic acid (p<0.05). SEM analysis showed a surface variation of the filled adhesives, mainly for Gα-TCP and GHAp. GHApshowed the highest UTS in dry medium (p<0.05), and its value decreased after lactic acid storage (p<0.05).Conclusions:
The findings of this study showed that HAp, OCP, and α-TCP affected the physical behavior of the experimental adhesive resins in different ways. HAp was the calcium phosphate that most adversely affected the surface roughness and the mechanical property of the material, mainly when exposed to an acid medium
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Polímeros
/
Resistencia a la Tracción
/
Ácidos
/
Fosfatos de Calcio
/
Recubrimientos Dentinarios
Idioma:
Inglés
Revista:
Braz. j. oral sci
Asunto de la revista:
Odontología
Año:
2020
Tipo del documento:
Artículo
País de afiliación:
Brasil
/
Uruguay
Institución/País de afiliación:
Federal University of Rio Grande do Sul/BR
/
University of the Republic/UY
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