The effects of temperature on the behaviour of an apatitic calcium phosphate cement

Ginebra, Maria‐Pau; Fernández, E.; Driessens, F. C. M.; Boltong, M. G.; Muntasell, J.; Font, Josep; Planell, J. A.

doi:10.1007/bf00134332

Cited by 59 publications

(45 citation statements)

References 3 publications

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“…In a first moment, this fact can be explained by the high liquid-to-powder ratio employed 0.60 mL.g -1 against 0.32-0.34 mL.g -1 normally used for conventional α-TCP cement 8,20,21,25 ; however, this huge amount of liquid was necessary to guarantee the cement moldability. Moreover, the addition of citric acid to cement's liquid phases has also contributed to the high setting times since this compound increases the TCP particles' wettability and cement paste fluidity caused by a deflocculation on the TCP powder which also leads to a lower rate of setting reaction 26 .…”

Section: Discussionmentioning

confidence: 99%

Si-TCP synthesized from "Mg-free" reagents employed as calcium phosphate cement

Motisuke

Carrodeguas²,

Zavaglia

2012

Mat. Res.

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The influence of silicon doping on calcium phosphate cement were explored in this work. α-TCP and Si-α-TCP were prepared by solid state reaction employing "Mg-free" CaHPO 4 , CaCO 3 and CaSiO 3 as precursors. It was possible to obtain TCP powders with low contents of β phase as contaminant. Cement liquid phase was an aqueous solution containing 2.5 wt. (%) of Na 2 HPO 4 and 1.5 wt. (%) of citric acid. The liquid-to-powder ratio was 0.6 mL.g -1. Chemical, physical and mechanical properties of the cement samples were determined by means of XRD, FTIR, XRF, compressive strength and SEM. The calcium phosphate cements obtained achieved satisfactory properties; however, Si-α-TCP presented a decrease on the rate of setting reaction.

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Section: Discussionmentioning

confidence: 99%

Si-TCP synthesized from "Mg-free" reagents employed as calcium phosphate cement

Motisuke

Carrodeguas²,

Zavaglia

2012

Mat. Res.

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“…18 In our case Biocement H set faster at body temperature RESULTS than at room temperature. 6 Further, we found that early contact with aqueous solutions resembling blood and other For Biocement F the results are given in Tables I through body fluids at and after the t I had no effect on its further VI. Table VII shows for which combinations of L/P and setting behavior.…”

Section: Introductionmentioning

confidence: 91%

“…The advantage they have over calcium when going from room temperature to body temperature. 6 phosphate bioceramic is that they do not need to be delivDuring setting there is no dimensional change or any deered in prefabricated forms or as granules, but instead they tectable thermal effect. 7 can be molded during the operation or simply injected into As for dental stone, the so-called Gillmore needles are the bone defect.…”

Section: Introductionmentioning

confidence: 99%

Effect of calcium carbonate on clinical compliance of apatitic calcium phosphate bone cement

Khaϊroun

Boltong

Driessens

et al. 1997

J. Biomed. Mater. Res.

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Clinical requirements for calcium phosphate bone cements were formulated in terms of the initial setting time, the final setting time, the cohesion time, and the ultimate compressive strength. Two cement formulations were tested. Biocement F was made of a powder containing alpha-tertiary calcium phosphate, precipitated hydroxyapatite, and monetite. Biocement D powder also contained CaCO3. The liquid/powder (L/P) ratio of the cement paste and the accelerator concentrations (% Na2HPO4) in the cement liquid were varied. For Biocement F there was a small area of combinations of L/P ratio and percent Na2HPO4 for which all clinical requirements were satisfied. This area covered only pastes that could be applied as doughs. However, Biocement D showed a much larger area of full compliance and it covered both doughlike and injectable pastes.

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“…The cement should not be deformed between times I and F because in that stage of the setting process any deformation could induce cracks [29]. The following handling requirements (in minutes) have been formulated for calcium orthophosphate cements, as a result [134,254]:…”

Section: Setting and Hardeningmentioning

confidence: 99%

Self-Setting Calcium Orthophosphate Formulations: Cements, Concretes, Pastes and Putties

Dorozhkin¹

2012

IJMC

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In early 1980s, researchers discovered self-setting calcium orthophosphate cements, which are a bioactive and biodegradable grafting material in the form of a powder and a liquid. Both phases after mixing form a viscous paste that after being implanted sets and hardens within the body as either a non-stoichiometric calcium deficient hydroxyapatite (CDHA) or brushite, sometimes blended with un-reacted particles and other phases. As both CDHA and brushite are remarkably biocompartible and bioresorbable (therefore, in vivo they can be replaced with a newly forming bone), self-setting calcium orthophosphate cements represent a good correction technique of non-weight-bearing bone fractures or defects and appear to be very promising materials for bone grafting applications. Besides, these cements possess an excellent osteoconductivity, molding capabilities, and easy manipulation. Nearly perfect adaptation to the tissue surfaces in bone defects and a gradual bioresorption followed by new bone formation are additional distinctive advantages of calcium orthophosphate cements. Besides, reinforced formulations are available; those are described as calcium orthophosphate concretes. Furthermore, formulations with high viscosity, such as pastes and putties are also known. The discovery of self-setting formulations has opened up a new era in the medical application of calcium orthophosphates; several commercial compositions have already been introduced as a result. Many more formulations are in experimental stages. In this review, an insight into the self-setting calcium orthophosphate formulations, as excellent biomaterials suitable for both dental and bone grafting applications, has been provided.

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The effects of temperature on the behaviour of an apatitic calcium phosphate cement

Cited by 59 publications

References 3 publications

Si-TCP synthesized from "Mg-free" reagents employed as calcium phosphate cement

Si-TCP synthesized from "Mg-free" reagents employed as calcium phosphate cement

Effect of calcium carbonate on clinical compliance of apatitic calcium phosphate bone cement

Self-Setting Calcium Orthophosphate Formulations: Cements, Concretes, Pastes and Putties

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