Research of Calcium Phosphates Using Fourier Transform Infrared Spectroscopy

Bērziņa-Cimdiņa, Līga; Borodajenko, Natālija

doi:10.5772/36942

Cited by 348 publications

(412 citation statements)

References 19 publications

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“…The peak V 3 , hydroxyl stretch carbonate and phosphate were observed between 1300 and1650cm -1 [18] 976 and 1190cm -1 [18,19]respectively, where the highest peaks was observed for sample 99CaP which contains 1wt% of SA but the increasing wt% of SA led to a decreasein intensity. The peak for C1-H deformation manunuronic acid residue and hydroxyl stretch phosphate V 4 was observed between 878.9-882.4 cm -1 [17] and 520-600cm -1 [18,20,21] respectively where both of these peaks were observed in sample 97CaP. Based on the results,the addition of the SA influenced the intensity peaks of the composite where the formation of chemical bonds occurred between both materials.…”

Section: Fourier Transform Infra-red (Ftir)mentioning

confidence: 74%

Powder Characterization of Calcium Phosphate/Collagen for Bone Implant Application

et al. 2017

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Abstract. Calcium phosphate (CaP) is a type of bioceramic material that is biocompatible and bioactive. It is usually used for bone implant application but it lacks mechanical strength. Therefore, sodium alginate (SA), a natural polymer, is combined with CaP to improve its properties of the CaP via precipitation method. The powder formed is then characterized by using FESEM, EDX, FTIR and DTA. Based on the FESEM result, it was confirmed that the SA particles were well embedded and homogeneously dispersed throughout the CaP matrix whereas the EDX result showed that the CaP and SA are pure and were not contaminated with other materials or substances.The FTIR result showed that the intensity of some peaks (3100-3600 cm-1 and 1585-1625cm-1) increased due to the addition of SA but for some peaks the addition of SA leads to a decrease in intensity (1650-1300cm-1 and 1190-976cm-1).This proves that the addition of SA in CaP influenced the intensity peaks and it was confirmed that chemical bonds were formed between these two substances. Meanwhile, the DTA result showed that CaP dehydroxylation occurred in the range of 650-13000C and the thermal degradation of SA happened at 245.80C but the SA thermal degradation temperature improved when it was added to the CaP matrix.

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Section: Fourier Transform Infra-red (Ftir)mentioning

confidence: 74%

Powder Characterization of Calcium Phosphate/Collagen for Bone Implant Application

et al. 2017

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“…However, this vibration mode can be related to the vibrations of the P-O bond in the Р 2 О 7 group as a result of decomposition of the inorganic phosphate complexes. Indeed, these vibration modes have been observed under thermal decomposition of inorganic compounds [45].…”

Section: Resultsmentioning

confidence: 99%

“…The analysis of the obtained IR spectra was performed based on a number of data taken from a set of reference sources, where human mixed saliva and hard dental tissues, as well as phosphates related to the formation of dentin and enamel were investigated by means of IR spectroscopy [5,38,[41][42][43][44][45]. A list of the active vibrations in the spectra of the first and second stages of the study, the ranges, and the frequencies with the peaks of vibration bands are presented in Table 1 along with their assignments to the groups of vibrations.…”

Section: Resultsmentioning

confidence: 99%

“…The use of IR-spectroscopy is appropriate due to its high precision, non-invasive character, clarity and selectivity, especially in dental research [38,[41][42][43][44][45][46].…”

Section: Discussionmentioning

confidence: 99%

“…Hence, the application of IRspectroscopy for the analysis of the changes in the molecular composition of the oral fluid is a logical and tested approach demonstrating high-precision results [4,5,41,36]. All the vibration mods of the samples were signed in accordance of the reference sources of IR spectroscopy [5,38,[41][42][43][44][45] and tabulated in Table 2.…”

Section: Infrared Microspectroscopy Analysismentioning

confidence: 99%

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Does dentifrice provide the necessary saturation of ions in oral fluids to favour remineralisation?

Seredin¹,

Goloshchapov²,

Yuri³

et al. 2018

Russ Open Med J

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Background -Changes in the molecular composition of mixed human saliva using endogenous and exogenous methods of caries prevention were studied and the duration of these changes in relation to the initial state of the oral fluid was determined. Material and Methods -In total, 200 European healthy, addiction-free, university-educated males and females, aged 22-30 were recruited for the study. Participants collected their mixed saliva samples after the use of a multi-mineral toothpaste (exogenous prevention) and after three days of taking a calcium glycerophosphate tablet (endogenous prevention). In the first stage of the study, samples of mixed saliva were analysed by infrared (IR) lab spectrometer and equipment of infrared microspectroscopy beamline at the Australian Synchrotron (Victoria, Australia) was used in the second stage of study. Results -Based on the experimental data obtained by IR-spectroscopy technique, the mineral/organic and carbon/phosphate ratios were calculated. The changes in the organic mineral balance of the oral cavity induced by these two preventive methods were analysed. The statistical significance of the results for the confidence level of p is indicated. The data shows that changes in the molecular composition of mixed saliva when using an exogenous method of caries prevention only provides a short-term effect, continuing for the first 30 minutes after the preceding prevention. Moreover, calcium glycerophosphate tablets can change the organic-mineral balance in mixed saliva, increasing the content of mineral groups and complexes. The content of endogenous, biologically accessible phosphate groups and complexes in the mixed saliva exceeds by approximately 12% that of the mixed saliva before the use of the prevention agents. Conclusion -Use of calcium glycerophosphate tablets in combination with brushing (a combination of endogenous and exogenous prevention methods) leads to the long-term presence of high concentrations of ions, mineral complexes and groups (phosphates) in the oral fluid.

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Mg Biodegradation Mechanism Deduced from the Local Surface Environment under Simulated Physiological Conditions

González

Lamaka

Mei

et al. 2021

Adv Healthcare Materials

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Although certified magnesium-based implants are launched some years ago, the not well-defined Mg degradation mechanism under physiological conditions makes it difficult to standardize its use as a degradable biomaterial for a wide range of implant applications. Among other variables influencing the Mg degradation mechanism, monitoring the pH in the corrosive solution and, especially, at the corroding interface is important due to its direct relation with the formation and stability of the degradation products layer. The interface pH (pH at the Mg/solution interface) developed on Mg-2Ag and E11 alloys are studied in situ during immersion under dynamic conditions (1.5 mL min -1 ) in HBSS with and without the physiological amount of Ca 2+ cations (2.5 × 10 -3 m). The results show that the precipitation/dissolution of amorphous phosphate-containing phases, that can be associated with apatitic calcium-phosphates Ca 10-x (PO 4 ) 6-x (HPO 4 or CO 3 ) x (OH or ½ CO 3 ) 2-x with 0 ≤ x ≤ 2 (Ap-CaP), promoted in the presence of Ca 2+ generates an effective local pH buffering system at the surface. Thus, high alkalinization is prevented, and the interface pH is stabilized in the range of 7.6 to 8.5.

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Research of Calcium Phosphates Using Fourier Transform Infrared Spectroscopy

Cited by 348 publications

References 19 publications

Powder Characterization of Calcium Phosphate/Collagen for Bone Implant Application

Powder Characterization of Calcium Phosphate/Collagen for Bone Implant Application

Does dentifrice provide the necessary saturation of ions in oral fluids to favour remineralisation?

Mg Biodegradation Mechanism Deduced from the Local Surface Environment under Simulated Physiological Conditions

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