The effect of various media on the conversion of borate microspheres into hydroxyapatite
Çeşitli ortamların borat mikrokürelerinin hidroksiapatite dönüşümü üzerindeki etkisi
- Tez No: 839064
- Danışmanlar: Belirtilmemiş.
- Tez Türü: Yüksek Lisans
- Konular: Metalurji Mühendisliği, Metallurgical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2022
- Dil: İngilizce
- Üniversite: The University of Nottingham
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Mühendislik Bilimleri Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 59
Özet
Borate microsphere is an interesting research area in terms of its ability to convert into hydroxyapatite (HA) which is similar in composition to the inorganic component of bone, and it is widely used in bioengineering applications namely tissue engineering, bone regeneration, and dental filling. Especially, due to their bioactivity, biocompatibility and low chemical durability properties, and large surface area coming from porous structures, the conversion of borate glasses into hydroxyapatite is likely to achieve fully when compared to other silicate-based bioactive glasses. This project aimed to compare the conversion rates of solid and porous borate microspheres and to evaluate the conversion rates of each microsphere in various media which are K2HPO4, Na2HPO4, and phosphate-buffered saline (PBS), TRIS solution (Tris(hydroxymethyl)aminomethane), simulated body fluid (SBF). Thus, borate glasses were split into two parts solid glass microspheres and porous glass microspheres and these glass particles were immersed in 5 different media. The conversion of microspheres into HA was observed at specific time intervals which are day 1, day 3, and day 7 by using SEM, XRD, and EDX. The results showed that the conversion of SGMS started at day 1 in Na2HPO4 while no significant evidence for the conversion into HA for the other media. Moreover, K2HPO4 and Na2HPO4 solutions provided the formation of HA at day 3 for PGMS whereas other solutions did not result in the formation of HA by day 7. The SEM images confirmed the morphologies achieved, EDX data showed a ratio of calcium to phosphorous for SGMS and PGMS and also XRD profiles confirmed the amorphous structure of glass microspheres.
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