Effects of hydroxypropyl methylcellulose and other gelling agents on the handling properties of calcium phosphate cement

✍ Scribed by Cherng, A. ;Takagi, S. ;Chow, L. C.

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 182 KB
• Volume: 35
• Category: Article
• ISSN: 0021-9304
• DOI: 10.1002/(sici)1097-4636(19970605)35:3<273::aid-jbm1>3.0.co;2-e

✦ Synopsis

The calcium phosphate cement (CPC) used in cellulose (CMC), chitosan acetate, and chitosan lactate were this study was formed by combining equimolar amounts used as cement liquids. Hardening time was measured by of tetracalcium phosphate (TTCP) and dicalcium phosphate the Gilmore needle test; resistance to washout was evaluated anhydrous (DCPA). This powder, when mixed with water, by the disintegration of the cement specimen in water with sets to a hard cement in about 30 min. However, the water-agitation; and mechanical strength was evaluated by the meabased CPC paste is not highly cohesive and is vulnerable to surement of diametral tensile strength and compressive washout until hardening occurs. The objectives of this study strength. Handling properties were greatly improved by the were to investigate the effects on handling properties, wash-addition of HPMC, CMC, chitosan acetate, and chitosan lacout resistance, cement hardening behavior, and mechanical tate. Hardening time was retarded by the additions of HPMC properties of adding several gelling agents to CPC paste.

and CMC, and mechanical strength was weakened by the Aqueous solutions that contained a mass fraction of 2-4% of addition of either the chitosan lactate or the chitosan acetate. hydroxypropyl methylcellulose (HPMC), carboxyl methyl-