Method and composition for control of gypsum operation time for orthopedics

Abstract

A method for controlling the operation time of the gypsum composition used in orthopaedics is disclosed. Said gypsum composition is prepared from medical gypsum and the aqueous solution in Wt ratio of (1-4):(1-5) through stirring. Said aqueous solution contains water, polyhydroxy and solidifying assistant in a certain ratio.

Description

technical field [0001] The present invention relates to a method for controlling the operation time of a gypsum composition for orthopedics and the gypsum composition for orthopedics. Background technique [0002] Using gypsum as a bone substitute is a known technology in the medical field, but it is an emerging technology as an injectable bone substitute, such as US Patent No. 6251139. The main difficulty of this emerging technology is that the operating time (working time) and semi-solidification time (semi-solidification time) of orthopedic plaster are not easy to control. The so-called operating time here refers to the time required from the time when the orthopedic gypsum is mixed with the aqueous solution until it is impossible (or extremely difficult) to extrude the mixed orthopedic gypsum composition from the syringe; and the so-called semi-setting time refers to The time required from the time when the orthopedic gypsum is mixed with the aq...

AI Technical Summary

Problems solved by technology

Traditional orthopedic gypsum compositions have a rather narrow range of half-setting time and operating time. For example, the half-setting time is 2.5 to 3 minutes, and the operating time is 3.5 to 4 minutes. Within 2.5 minutes, inject it into the body fluid, and the orthopedic gypsum composition will disperse; 2.5 to 3 minutes after mixing, it cannot be guaranteed that it will not disperse; 3.5 to 4 min