FTIR and XRD investigations on the thermal stability of hydroxyapatite during hot pressing and pressureless sintering processes

Rapacz-Kmita, Alicja; Paluszkiewicz, C.; Ślósarczyk, A.; Paszkiewicz, Z.

doi:10.1016/j.molstruc.2004.11.070

Cited by 170 publications

(94 citation statements)

References 7 publications

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“…While the HAP crystal structure is present over the entire temperature range, there is partial transformation/decomposition of the HAP phase that becomes more pronounced with increased temperature. HAP is known to undergo dehydroxylation to oxyhydroxyapatite (OHAP), and to transform into several calcium phosphates, such as TTCP or β-TCP, as described by Rapacz-Kmita et al [18]. In the present study, HAP dehydroxylation starts at 650 °C with further decomposition to β-TCP from 750 °C.…”

Section: Influence Of Temperaturesupporting

confidence: 60%

Mechanical, pH and Thermal Stability of Mesoporous Hydroxyapatite

Kamieniak

Kelly

Banks

et al. 2017

J Inorg Organomet Polym

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Section: Influence Of Temperaturesupporting

confidence: 60%

Mechanical, pH and Thermal Stability of Mesoporous Hydroxyapatite

Kamieniak

Kelly

Banks

et al. 2017

J Inorg Organomet Polym

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“…Figure 4 showed the FT-IR spectra of pure gelled β-glucan, HAp ceramics and composite. Characteristics bands due to PO 4 3-ions were visible in the spectrum [38]. All these bands were also present in composite spectrum.…”

Section: General Characteristics Of Compositementioning

confidence: 84%

Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair

et al. 2013

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Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair IntroductionHydroxyapatite (HAp), especially in a porous form, is appreciated as a bone filler due to its biocompatibility, bioactivity, osteoconductivity, minimal risk of appearance of allergic reactions, lack of carcinogenic properties and lack of sensitivity to sterilization processes [1][2][3]. There are numerous commercially available bone graft materials based on biologic and synthetic HAp, including ProOsteon ® (Interpore Cross International, USA), Endobon (BIOMET Orthopaedics, Switzerland), Cerapatite (Ceraver Osteal, France), Synatite (SBM, France) and others. HAp may serve not only as a bone filler but also as a carrier of active substances: antibiotics, chemiotherapeutics, growth factors, etc. [4][5][6][7][8][9]; it can also be used in composites, as a factor increasing their cytocompatibility, bioactivity, osteoconductivity, adhesion of coatings and compression modulus [10][11][12][13][14]. On the other hand, HAp application is often limited due to its relatively poor resorption and slow replacement by the host bone after implantation, substantially high Young modulus, and low fracture toughness [15,16], although these properties may be improved by addition of elasticity-increasing polymers. It is considered that polymer-ceramic composites reveal superior properties (at least in some aspects) over polymer and ceramic alone [17]. However, most polymers used for bone filler fabrication meet only some of the criteria for implantable materials.Bone replacing material such as ceramics or crushed bone offers an insufficient surgical handiness, especially when the orthopedic surgeon has to handle granules (in case of defects in maxillary bone) or scaffolds (rigid and non-adaptable to the implantation site). Some commercially available biomaterials contain the artificial or natural polymers serving as plasticizing agents and thus significantly reduce this inconvenience. Among them, EasyGraft TM (Degradable Solutions SA, Switzerland), Plexur M and P (Osteotech, USA) and Cerapatite-Collagen (Ceraver Osteal, France) can be listed. EasyGraft TM contains PLGA-coated β-TCP granules which hardens into a compact mass via partial and temporary PLGA dissolution by organic solvent; Plexur M and P are composed of cortical bone and resorbable artificial polymer; Cerapatite-Collagen, made from HAp granules and naturally-derived collagen fibers, becomes elastic after hydration with blood or saline. Bone or ceramic granules and powders may also be turned into a paste using collagen gels (e.g., Tecnoss ® Gel O; Tecnoss, Italy) or fibrin glue [18,19]. However, the natural polymeric compounds used in commercially available composites (collagen, fibrin glue) originate from animal sources; this can be considered as a limiting factor because of the increased risk of transmissible contamination (e.g. viruses) and undesirable immune responses. Thus, the necessity of careful purification of these animal polymers exacts the high price of fin...

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“…[314] FTIR showed vibrational bands around 604, 632, 962, 1031 and 1095 cm -1 (Figure 1b), which are typical for a calcium phosphate apatite. [351] Acicularshaped apatite particles, with dimensions ranging from 200 to 400 nm in length and 20 to 50 nm in width, were observed in TEM images (Figure 1c). …”

Section: Physicochemical Characterization Of the Synthesised Apatitementioning

confidence: 99%

Instructive composites for bone regeneration

Barbieri¹

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FTIR and XRD investigations on the thermal stability of hydroxyapatite during hot pressing and pressureless sintering processes

Cited by 170 publications

References 7 publications

Mechanical, pH and Thermal Stability of Mesoporous Hydroxyapatite

Mechanical, pH and Thermal Stability of Mesoporous Hydroxyapatite

Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair

Instructive composites for bone regeneration

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