XRD and FTIR crystallinity indices in sound human tooth enamel and synthetic hydroxyapatite

Reyes‐Gasga, J.; Martínez-Piñeiro, Esmeralda; Rodríguez-Álvarez, Galois; Tiznado-Orozco, Gaby E.; Garcı́a-Garcı́a, R.; Brès, E.

doi:10.1016/j.msec.2013.07.014

Cited by 171 publications

(112 citation statements)

References 26 publications

Supporting

Mentioning

102

Contrasting

Unclassified

Order By: Relevance

“…In amorphous calcium phosphate, due to lattice distortion, PO 4 vibration bending mode is usually seen as a single broad band [39]. The finding of the present study indicated better crystallinity and bigger crystal size of NeoMTA Plus than of MTA Angelus [38]. The crystallinity index of both NeoMTA Plus and MTA Angelus (4.8 ± 0.37 and 3.7 ± 0.52, resp.)…”

Section: Discussionmentioning

confidence: 44%

“…The crystallinity index of both NeoMTA Plus and MTA Angelus (4.8 ± 0.37 and 3.7 ± 0.52, resp.) falls in the range recorded for synthetic hydroxyapatite (3.6-6.07), but it is generally higher than that recorded for sound human tooth enamel (3.23) [38].…”

Section: Discussionmentioning

confidence: 52%

“…FTIR has been used as a reliable quantitative technique to measure the crystallinity index (a measure of crystal size and perfection) of biological as well as synthetic hydroxyapatite [11,38,39]. For this purpose, the splitting of PO 4 vibration bending mode (515-630 cm and longitudinal optical frequency, has been used as an indication of the hydroxyapatite's crystallinity [11,38,39].…”

Section: Discussionmentioning

confidence: 99%

“…For this purpose, the splitting of PO 4 vibration bending mode (515-630 cm and longitudinal optical frequency, has been used as an indication of the hydroxyapatite's crystallinity [11,38,39]. In amorphous calcium phosphate, due to lattice distortion, PO 4 vibration bending mode is usually seen as a single broad band [39].…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Chemistry and Bioactivity of NeoMTA Plus™ versus MTA Angelus® Root Repair Materials

Zeid

Alamoudi

Khafagi³

et al. 2017

Journal of Spectroscopy

View full text Add to dashboard Cite

Objectives. To analyse the chemistry and bioactivity of NeoMTA Plus in comparison with the conventional root repair materials. Method and Materials. Unhydrated and hydrated (initial and final sets) materials were analysed by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). For bioactivity study, small holes of dentin discs were filled with either materials, immersed in PBS for 15 days, and analysed with FTIR and scanning electron microscope with energy dispersive X-ray (SEM/EDX). The calculation of crystallinity and carbonate/phosphate (CO 3 /PO 4 ) ratio of surface precipitates (from FTIR) and calcium/phosphate (Ca/P) ratio (from EDX) was statistically analysed using t-test or ANOVA, respectively, at 0.05 significance. Results. Both materials are tricalcium silicate-based that finally react to be calcium silicate hydrate. NeoMTA Plus has relatively high aluminium and sulfur content, with tantalum oxide as an opacifier instead of zirconium oxide in MTA Angelus. NeoMTA Plus showed better apatite formation, higher crystallinity and Ca/P but lower CO 3 /PO 4 ratio than MTA Angelus. SEM showed globular structure with a small particle size in NeoMTA Plus while spherical structure with large particle size in MTA Angelus. Conclusion. Due to fast setting, higher crystallinity, and better bioactivity of NeoMTA Plus, it can be used as a pulp and root repair material.

show abstract

Section: Discussionmentioning

confidence: 44%

Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Chemistry and Bioactivity of NeoMTA Plus™ versus MTA Angelus® Root Repair Materials

Zeid

Alamoudi

Khafagi³

et al. 2017

Journal of Spectroscopy

View full text Add to dashboard Cite

show abstract

“…This was also confirmed by recording the ATR spectra of physical mixtures of HA and chitosan containing from 1% to 30% of chitosan; in all cases the characteristic peaks of chitosan were not visible (data not shown). The crystallinity index calculated from the infrared data, using a method previously described [21,22] (Table 3), showed that the control HA and the HA prepared in the presence of CNTs had similar crystallinity to fresh bone and enamel, as reported by Reyes-Gasga et al [23]; however, the presence of only polymer induced a decrease in the crystallinity index. XRD patterns of the composites (Figs.…”

Section: Synthesis and Characterisation Of Ha Compositessupporting

confidence: 64%

Synthesis of carbon nanotubes loaded hydroxyapatite: Potential for controlled drug release from bone implants

et al. 2016

View full text Add to dashboard Cite

Carbon nanotubes (CNTs) can support the building of flexible and porous scaffolds for bone regeneration. Various studies have looked at the mixing of CNTs with hydroxyapaptite for the formulation of bone implants. In the present work, we report the one step preparation and characterisation of chitosan/hydroxyapatite/CNTs composite materials obtained by wet precipitation of hydroxyapatite (HA) in the presence of chitosan or its amphiphilic derivative N-octyl-O-sulphate chitosan and CNTs. The in situ precipitation of HA assured inclusion of the polysaccharide and the CNTs in the HA structure and provided materials with the ability to control the release of different model drugs.

show abstract

Rapid Customization of Biomimetic Cartilage Scaffold with Stem Cell Capturing and Homing Capabilities for In Situ Inductive Regeneration of Osteochondral Defects

Zeng,

Chen,

Wei

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Abstract3D printing of articular cartilage tissue faces challenges like replicating its complex structure, time‐consuming in vitro stem cell culture, and a lack of robust in situ regeneration methods for osteochondral defects (OC). In response, an innovative approach utilizing pre‐designed bioink modular units for one‐step printing and immediate implantation is proposed, circumventing the need for prior in vitro stem cell cultivation. The resulting printed scaffold not only accurately reproduces the three‐layer structure and material gradient of articular cartilage tissue but also attains impressive compressive strength (6.3 MPa) through the reinforcement of hydroxyapatite nanofibers and the establishment of chemical bonds with hydrogels. Moreover, the scaffold integrates stem cell capturing and homing layers on its bottom and top layers via chemical crosslinking aptamer and loading poly (lactic‐co‐glycolic acid) (PLGA) nanospheres encapsulated with stromal cell‐derived factor‐1α (SDF‐1α), respectively. This design enables the specific capture of bone marrow mesenchymal stem cells (BMSCs) in vivo through aptamer interaction, followed by their mobilization to home in on the hyaline cartilage layer via the chemotaxis of SDF‐1α concentration gradient. Within the scaffold's microenvironment, these BMSCs undergo differentiation into distinct cells for each layer, effectively contributing to the repair of OC defects in rabbits.

show abstract

XRD and FTIR crystallinity indices in sound human tooth enamel and synthetic hydroxyapatite

Cited by 171 publications

References 26 publications

Chemistry and Bioactivity of NeoMTA Plus™ versus MTA Angelus® Root Repair Materials

Chemistry and Bioactivity of NeoMTA Plus™ versus MTA Angelus® Root Repair Materials

Synthesis of carbon nanotubes loaded hydroxyapatite: Potential for controlled drug release from bone implants

Rapid Customization of Biomimetic Cartilage Scaffold with Stem Cell Capturing and Homing Capabilities for In Situ Inductive Regeneration of Osteochondral Defects

Contact Info

Product

Resources

About