Material Processing
Sourav Singha Roy; Sriparna Sarkar; Debashis Chakraborty
Abstract
The limited availability of fossil fuels on the Earth has led researchers to develop new materials that are derived from renewable feedstocks. The polymers produced from the ROP of cyclic esters like (LA and ɛ-CL) are biodegradable, biocompatible, and bioassimilable and thus find major applications ...
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The limited availability of fossil fuels on the Earth has led researchers to develop new materials that are derived from renewable feedstocks. The polymers produced from the ROP of cyclic esters like (LA and ɛ-CL) are biodegradable, biocompatible, and bioassimilable and thus find major applications in various field. The ROP are catalyzed by the metal-based organometallic catalyst and metal-free organocatalyst. This review exemplifies the living and immortal ROP. The advantage of such polymerization is that they produce polymers with controlled molecular weight distribution. For the immortal ROP, more than one polymer chain grows from the single catalytic site in the presence of chain transfer agents (CTAs), and thus catalyst loading is low, which make the process economically more viable. The nature of CTAs and loading of CTAs with respect to the catalyst is crucial as the catalyst should be effective in the presence of CTAs. The review also discusses functionalized CTAs employed for the polymerization in some instances where functionalized polymers are generated.
Material Analysis
Manuel Aparicio-Razo; José Luis Jr. Mongalo-Vázquez; J. A. Yáñez Ramos; Adolfo Navarro-Zárate; Víctor Hugo Santos-Enríquez; Israel Vivanco-Pérez; J. Flores Méndez; Genaro Alberto Paredes-Juárez
Abstract
This review article presents the biological and technological properties of biomaterials: titanium, polyetheretherketone, zirconium and Si3N4, focused on the application of dental implants. The methodology focused on examining different works related to the topics of biocompatibility, biofilm formation ...
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This review article presents the biological and technological properties of biomaterials: titanium, polyetheretherketone, zirconium and Si3N4, focused on the application of dental implants. The methodology focused on examining different works related to the topics of biocompatibility, biofilm formation and adhesion properties, fibroblast proliferation, bone resorption, peri-implant infection, osseointegration, histology, cytotoxicity, toxicity, carcinogenicity, genotoxicity, hemocompatibility, vascularization, mechanical resistance and approval for use by the FDA. The results of the review show that all four biomaterials have favorable properties that can revolutionize implants, however, more studies are needed to confirm the results in the short and medium term.
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