CTS242 - Capítulos de Libros
https://hdl.handle.net/10481/38937
2024-03-29T10:09:01ZBiomaterials for catalysed mineralization of dental hard tissues
https://hdl.handle.net/10481/41030
Biomaterials for catalysed mineralization of dental hard tissues
Toledano Pérez, Manuel; Osorio Ruiz, Raquel
Aparicio, Conrado; Ginebra, María Pau
Aesthetic and plastic restorative materials in dentistry are demanded. These materials are resin based, and require demineralization procedures on dentine and enamel, prior to resin application. Infiltration of hydrophilic monomers into demineralized tissue creates a hybrid layer that couples resinous materials to dentine. Resin infiltration is never complete, and monomers will not be effectively polymerized. Therefore, a defective interface susceptible to collagen and resin degradation is formed and jeopardizes longevity of restorations. This chapter discusses biomaterials able to catalyse remineralization of resin-infiltrated collagen matrices, since the remineralized subsurface of the tissue may be resistant to degradation over time.
New Advanced Materials for High Performance at the Resin-Dentine Interface
https://hdl.handle.net/10481/41029
New Advanced Materials for High Performance at the Resin-Dentine Interface
Toledano Pérez, Manuel; Osorio Ruiz, Raquel
This chapter provides a tool for the integration of new concepts and biomaterials related with the resin-dentine interface. The principles of dentine demineralisation and remineralisation that shape modern restorative dentistry practices, as well as considerations for the selection of new materials for different restorative approaches, are emphasised. Re-incorporation of mineral into the demineralised dentine matrix is important since the mineral precipitated may work as a constant site for further nucleation, and the remineralised subsurface of the tissue may be more resistant to subsequent acid attack. This deposition of minerals may be due to both spontaneous precipitation induced by local supersaturation of Ca and P in the presence of non-specific tissue alkaline phosphatase or through heterogeneous nucleation sites provided by phosphoproteins within the dentine collagen matrix. Nucleation is a multistep process involving both protein and mineral transition and suggests a temporally synchronised process. Dentine provides both structural and chemical frameworks, acting as a scaffold for mineral deposition at specific sites. The ultimate goal in the design and improvement of new materials for high performance at the resin-dentine interface is to render a stronger and durable adhesion to dental tissues despite the severe conditions in the oral environment. In the present chapter, glass ionomers, calcium-phosphate cements and doped dental adhesives have been selected to represent the cutting edge biomaterials at the interface.