Influence of water content on hardening and handling of a premixed calcium phosphate cement

Engstrand, JohannaUppsala universitet,Tillämpad materialvetenskap,Materials in Medicine (författare)

Handling of calcium phosphate cements is difﬁcult, where problems often arise during mixing, transferring tosyringes, and subsequent injection. Via the use of premixed cements the risk of handling complications is reduced. However, for premixed cements to work in a clinical situation the setting time needs to be improved. The objective of this study is to investigate the inﬂuence of the addition of water on the properties of premixed cement. Monetite-forming premixed cements with small amounts of added water (less than 6.8 wt.%) were prepared and the inﬂuence on injectability, working time, setting time and mechanical strength was evaluated. The results showed that the addition of small amounts of water had signiﬁcant inﬂuence on the properties of the premixed cement. With the addition of just 1.7 wt.% water, the force needed to extrude the cement from a syringe was reduced from 107 (±15)N to 39 (±9)N, the compression strength was almost doubled, and the setting time decreased from 29 (±4)min to 19 (±2)min, while the working time remained 5 to 6 h. This study demonstrates the importance of controlling the water content in premixed cement pastes and how water can be used to improve the properties of premixed cements.

Åberg, Jonas,1982-Uppsala universitet,Tillämpad materialvetenskap,Materials in Medicine(Swepub:uu)jooab683 (författare)
Engqvist, HåkanUppsala universitet,Tillämpad materialvetenskap,Materials in Medicine(Swepub:uu)hakaengq (författare)
Uppsala universitetTillämpad materialvetenskap (creator_code:org_t)

Ingår i:Materials science & engineering. C, biomimetic materials, sensors and systems: Elsevier BV33:1, s. 527-5310928-49311873-0191

Av författaren/redakt...: Engstrand, Johan ...; Åberg, Jonas, 19 ...; Engqvist, Håkan

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Keramteknik

MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Medicinsk biotek ...; och Biomaterialveten ...

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