title: The effect of plaster (CaSO4 ·1/2H2O) on the compressive strength, self-setting property, and in vitro bioactivity of silicate-based bone cement.
abstract: Bone cements have been widely used for orthopedic applications. Previous studies have shown that calcium silicon-based bone cements (CSC) were injectable, bioactive, biodegradable, and mechanically strong in the long term, while their short-term compressive strength was low and setting time was too long. On the other hand, plaster (CaSO(4)·1/2H(2)O, POP) sets quickly upon contact with water and has excellent short-term compressive strength. The aim of this study is to prepare CSC/POP composite cements and investigate the effect of POP on the compressive strength, setting time, injectability, degradation, and in vitro bioactivity of the composite cements. The results have shown that POP content plays an important role to modulate the physicochemical property of CSC. The addition of POP into CSC significantly decreased the initial and final setting time and enhanced the short-term compressive strength and degradation rate. The obtained composite cement with 30% POP has been found to possess optimal setting time and short-term compressive strength. In addition, the prepared composite cements still maintain apatite-mineralization ability in simulated body fluids and their ionic extracts have no significant cytotoxicity to L929 cells. The results suggested that the addition of POP into CSC is a viable method to improve their setting properties and short-term compressive strength. The obtained composite cements with the optimized composition of 70% CSC and 30% POP could be potentially used for bone repair application.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Liu
authors.forename: Chengtie
authors.initials: C
authors.lastname: Wu
authors.forename: Weining
authors.initials: W
authors.lastname: Liu
authors.forename: Wanyin
authors.initials: W
authors.lastname: Zhai
authors.forename: Jiang
authors.initials: J
authors.lastname: Chang
mesh_terms: D000818:Animals; D001031:Apatites / Q000737:chemistry; D001826:Body Fluids; D001843:Bone Cements / Q000737:chemistry / Q000633:toxicity; D002133:Calcium Sulfate / Q000008:administration & dosage / Q000737:chemistry / Q000633:toxicity; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D003188:Composite Resins / Q000008:administration & dosage / Q000737:chemistry / Q000633:toxicity; D019245:Compressive Strength; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects; D006801:Humans; D007267:Injections; D008422:Materials Testing; D051379:Mice; D008855:Microscopy, Electron, Scanning; D012823:Silicate Cement / Q000008:administration & dosage / Q000737:chemistry / Q000633:toxicity; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: D001031:Apatites; D001843:Bone Cements; D003188:Composite Resins; D012823:Silicate Cement; D002133:Calcium Sulfate