wo1997035807a1optimization of calcium aluminate for use as a bone
Porous calcium aluminate ceramics for bone-graft
Calcium aluminate scaffolds with controlled porosity were processed for bone-graft applications. Indirect fused deposition process was used to fabricate these structures. Phase analyses were done using x-ray diffraction technique on powdered samples of calcium aluminates at different compositions.
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Calcium aluminate cement-based compositions for
Calcium aluminate cement-based compositions for biomaterial applications R.M. Parreiraa T.L. Andradea A.P. Luzb V.C. Pandolfellib I.R. Oliveiraa n a Institute for
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Synthesis and Characterization of Calcium Aluminate
Calcium aluminate has been long involved in the practical applications in the cement and concrete industry as well as in refractories and ceramic materials. Recently new advanced applications of calcium aluminate have appeared in optical and structural ceramics. Calcium aluminates (CA)
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A novel calcium aluminate‐melatonin scaffold enhances bone
Therefore melatonin and platelet‐rich plasma (PRP) were utilized for their known osteoinductive properties. It was hypothesized that melatonin and/or PRP would enhance the osteoinductive and osteoconductive properties of calcium aluminate (CA) scaffolds to promote bone regeneration in a model of calvarial defects.
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New cement based on calcium and strontium aluminates for
Nov 01 2019 · First the desired crystalline phases of calcium and strontium aluminates i.e. dodeca-calcium hepta-aluminate (Ca 12 Al 14 O 33) C 12 A 7 and tri-strontium aluminate (S 3 Al 2 O 6) S ˇ 3 A were obtained by Solution Combustion Synthesis and characterized.
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Calcium silicate/calcium aluminate composite biocement for
(2016). Calcium silicate/calcium aluminate composite biocement for bone restorative application synthesis characterisation and in vitro biocompatibility.
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Evaluation of Calcium Aluminate/Calcium Phosphate Based
The curing of calcium aluminate cement occurs with high water consumption during setting and hardening of prepared pastes. The relatively high strength values of calcium aluminate pastes compared to those of calcium phosphate and also wide range variations in the consistency and formulations make it suitable for a wide range of applications 3 4.
Get PriceThe Application of Melatonin and Platelet-Rich Plasma in
DEVELOPMENT OF A BIOACTIVE CALCIUM ALUMINATE BONE REGENERATIVE SCAFFOLD By William P. Clafshenkel Approved July 28 2011 _____ Paula A. Witt-Enderby Ph.D. Professor of Pharmacology-Toxicology Graduate School of Pharmaceutical Sciences Duquesne University Committee Chair _____ Ellen S. Gawalt
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USB2Artificial bone and joint compositions and
The present invention provides a ceramic porous body for in-vitro and in-vivo use comprising a composition comprising a calcium aluminate (CA) containing phase and optionally at least one of an accelerator a retarder a surfactant a foaming agent a reactive alumina water a fiber and a biologically active material and combinations thereof.
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US Patent Application for Calcium aluminate based paste
The present invention relates to a calcium aluminate based paste forming a chemically bonded biomaterial on hydration thereof for in vivo anchoring of new implants or stabilizing of existing implants in situ to an adjacent bone tissue which paste provides a controlled pH value and temperature as well as initial hardening time. By virtue of the pH value and temperature the paste exhibits
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Calcium aluminate cement used in bone defects induced in
The patterns of the calcium aluminate cement in bone defects experimentally induced in the femur of 12 New Zealand White rabbits were evaluated. The animals were distributed in three experimental groups corresponding to postoperative observation periods of 15 (G15) 30 (G30) and 60 (G60) days. Clinical surgical radiographic and histological appraisals were made to observe the osteoinductor
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The use of ceramics for bone replacement. A comparative
Three different porous ceramics (calcium aluminate calcium hydroxyapatite and tricalcium phosphate) with interlinked pores of two size ranges (150 to 210 micron) were implanted into the skulls of rats and rabbits for up to six months the interaction with surrounding bone which is virtually devoid of bone marrow was then assessed.
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Calcium silicate/calcium aluminate composite biocement for
(2016). Calcium silicate/calcium aluminate composite biocement for bone restorative application synthesis characterisation and in vitro biocompatibility.
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USB2Artificial bone and joint compositions and
The present invention provides a ceramic porous body for in-vitro and in-vivo use comprising a composition comprising a calcium aluminate (CA) containing phase and optionally at least one of an accelerator a retarder a surfactant a foaming agent a reactive alumina water a fiber and a biologically active material and combinations thereof.
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Influence of tricalcium aluminate phase on in vitro
Influence of tricalcium aluminate phase on in vitro biocompatibility and bioactivity of calcium aluminate bone cement
Get PriceRepair of Bone Defects Filled with New Calcium Aluminate
The aim of this study was to evaluate and compare the repair of bone defects filled with calcium aluminate cement (EndoBinder) mineral trioxide aggregate (MTA) and calcium hydroxide. Methods After mixing the cements were inserted into bone defects (3.3 mm) mechanically created in the right and left tibias of 30 rats (Rattus norvegicus Wistar).
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In vitro Bioactivity Assessment of Novel Composites Based
areas. Calcium aluminate cement has been of great interest to researchers as bone cement 7 due to their high mechanical properties and bioactivity 9 10. However this type of cement shows long setting times which limits their use for some medical applications. In previous studies 11 it
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A novel calcium aluminate‐melatonin scaffold enhances bone
Therefore melatonin and platelet‐rich plasma (PRP) were utilized for their known osteoinductive properties. It was hypothesized that melatonin and/or PRP would enhance the osteoinductive and osteoconductive properties of calcium aluminate (CA) scaffolds to promote bone regeneration in a model of calvarial defects.
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Chemical physical and mechanical properties of a novel
Aug 18 2010 · Results The calcium aluminate cement without additives had a setting time of approximately 60 min and when combined with Li 2 CO 3 it decreased to 10 min. The material also released Ca 2 ions and alkalinized the medium. Moreover the addition of additives (dispersant plasticizer and radiopacifier) improved its properties resulting in a
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Development and characterization of α-tricalcium phosphate
and hence a slower bone substitution 8 . Therefore it is difficult to increase the strength of these cements without negatively affecting other properties. In the late 1990s the Swedish company Doxa Certex AB proposed the use of calcium aluminate cements
Get PriceEvaluation of Calcium Aluminate/Calcium Phosphate Based
The curing of calcium aluminate cement occurs with high water consumption during setting and hardening of prepared pastes. The relatively high strength values of calcium aluminate pastes compared to those of calcium phosphate and also wide range variations in the consistency and formulations make it suitable for a wide range of applications 3 4.
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US Patent Application for Calcium aluminate based paste
The present invention relates to a calcium aluminate based paste forming a chemically bonded biomaterial on hydration thereof for in vivo anchoring of new implants or stabilizing of existing implants in situ to an adjacent bone tissue which paste provides a controlled pH value and temperature as well as initial hardening time. By virtue of the pH value and temperature the paste exhibits
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Impact of calcium aluminate cement with additives on
Calcium aluminate-based cement (CAC) represents a promising alternative since it exhibits favorable physicochemical characteristics such as its thermal coefficient of and chemical composition similar to the tooth and human bone 9but also due to the bioactivity i. e. its
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Chemical physical and mechanical properties of a novel
Aug 18 2010 · Results The calcium aluminate cement without additives had a setting time of approximately 60 min and when combined with Li 2 CO 3 it decreased to 10 min. The material also released Ca 2 ions and alkalinized the medium. Moreover the addition of additives (dispersant plasticizer and radiopacifier) improved its properties resulting in a
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Intermediate conversion kinetics in ticalcium aluminate
Apart from its use as a cement phase other applications of C 3 A for exam-ple as a catalyst support 3 and as a doping material to improve the biocompatibility and bioactivity of calcium aluminate bone cement 4 have emerged in recent years.Despite a long history of application the kinetics of formation of C 3 A have eluded consensus and
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In vitro Bioactivity Assessment of Novel Composites Based
areas. Calcium aluminate cement has been of great interest to researchers as bone cement 7 due to their high mechanical properties and bioactivity 9 10. However this type of cement shows long setting times which limits their use for some medical applications. In previous studies 11 it
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(PDF) Solid–solid reaction kinetics Formation of
When impurities such as Kþ Naþ Si4þ and Fe3þ are a doping material to improve the biocompatibility and bioac- incorporated into C3A crystals it is called celite which melts tivity of calcium aluminate bone cement4 has emerged in at about 13508C and assists the other reactions in the rotary recent years. cement kiln.1 During hydration
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In vitro Bioactivity Assessment of Novel Composites Based
areas. Calcium aluminate cement has been of great interest to researchers as bone cement 7 due to their high mechanical properties and bioactivity 9 10. However this type of cement shows long setting times which limits their use for some medical applications. In previous studies 11 it
Get PriceThe Application of Melatonin and Platelet-Rich Plasma in
DEVELOPMENT OF A BIOACTIVE CALCIUM ALUMINATE BONE REGENERATIVE SCAFFOLD By William P. Clafshenkel Approved July 28 2011 _____ Paula A. Witt-Enderby Ph.D. Professor of Pharmacology-Toxicology Graduate School of Pharmaceutical Sciences Duquesne University Committee Chair _____ Ellen S. Gawalt
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