scholarly journals Pengaruh Rasio HA/TCP terhadap Karakteristik Komposit BCP-Gelatin-CMC sebagai Bahan Injectable Bone Substitute

2020 ◽  
Vol 1 (2) ◽  
pp. 15-20
Author(s):  
Mochammad Dachyar Effendi ◽  
Nandang Suhendra

Penambahan bahan semen tulang kedalam rongga tulang dapat menjadi salah satu alternatif untuk mencegah kerusakan tulang akibat osteoporosis. Kelemahan utama dari bahan implant ortopedik berbasis hydroksiapatit sinter adalah bahan dalam bentuk solid dimana dalam aplikasi pembedahan, sulit untuk mengisi rongga tulang dengan ukuran tertentu. Alternatif yang nyaman untuk bahan pengisi tulang suspensi adalah dengan  menggunakan bahan Injectable bone substitute. Dalam studi ini dipelajari komposisi material Injectable Bone substitute dengan matrik berupa polimer CMC-gelatin dan HA/TCP sebagai filler. Dilakukan variasi rasio Hidroksiapatit (HA) / tri-calcium phosphate (TCP) (70:30; 50:50; 40:60)  untuk  mempelajari pengaruhnya terhadap sifat-sifat fisik dan mekanik campuran. Hasil uji FTIR menunjukkan gugus fungsi fosfat (PO43-) gugus fungsi karboksil dan gugus fungsi NH2 yang merujuk kepada  bahan penyusunnya. Peningkatan porositas karena perubahan morfologi dikonfirmasi oleh gambar mikroskop polaritas. Hasil uji tekan menunjukkan berkurangnya  nilai kuat tekan dengan bertambahnya konsentrasi TCP dalam campuran. Semua kelompok uji menunjukkan kemiripan struktural dengan tulang cancellous dalam sifat porositas dan kekuatan mekanik.

Author(s):  
Pluta Klaudia ◽  
Walczyk Dorota ◽  
Sobczak-Kupiec Agnieszka ◽  
Malina Dagmara ◽  
Tyliszczak Bozena

2020 ◽  
Vol 34 (2) ◽  
pp. 59-71
Author(s):  
Antonia Ressler ◽  
Karla Zadro ◽  
Hrvoje Ivanković ◽  
Marica Ivanković ◽  
Matija Cvetnić ◽  
...  

Nanocomposite structure of the bone can be mimicked by chitosan/hydroxyapatite (CS/HAp) composite scaffold. Biological hydroxyapatite (HAp) contains various ions, which have a crucial role in bone growth. The aim of the present work was to synthesize biomimetic hydroxyapatite and prepare composite scaffolds based on chitosan, where HAp was synthesised from hen eggshells, seashells and cuttlefish bone. The powders were composed of nano-structured calcium deficient HAp and amorphous calcium phosphate (ACP). In the as-prepared powders, Sr2+, Mg2+ and Na+ ions were detected as a result of using biogenic precursor of Ca2+ ions. Highly porous CS/HAp structures have been prepared by freeze-gelation technique. The CS/HAp scaffolds have shown highly porous structure with very well interconnected pores and homogeneously dispersed HAp particles. The MTT assay of CS/HAp scaffolds has shown no toxicity, and the live/dead assay has confirmed good viability and proliferation of seeded cells.


2010 ◽  
Vol 30 (12) ◽  
pp. 2563-2567 ◽  
Author(s):  
Christian Bergmann ◽  
Markus Lindner ◽  
Wen Zhang ◽  
Karolina Koczur ◽  
Armin Kirsten ◽  
...  

2007 ◽  
Vol 361-363 ◽  
pp. 119-122 ◽  
Author(s):  
J.H. Lim ◽  
J.H. Park ◽  
Eui Kyun Park ◽  
Hae Jung Kim ◽  
Il Kyu Park ◽  
...  

An appropriate scaffold, which provides structural support for transplanted cells and acts as a vehicle for the delivery of biologically active molecules, is critical for tissue engineering. We developed a fully interconnected globular porous biphasic calcium phosphate ceramic scaffold by adopting a foaming method, and evaluated its efficiency as a bone substitute and a scaffold for bone tissue engineering by in vitro and in vivo biocompatible analysis and its osteogenic healing capacity in rat tibial bone defects. They have spherical pores averaging 400um in diameter and interconnecting interpores averaging 70um in diameter with average 85% porosity. They elicited no cytotoxicity and noxious effect on cellular proliferation and osteoblastic differentiation during the cell-scaffold construct formation. Also the bone defects grafted with fully interconnected globular porous biphasic calcium phosphate ceramic blocks revealed excellent bone healing within 3 weeks. These findings suggest that the fully interconnected porous biphasic calcium phosphate scaffold formed by the foaming method can be a promising bone substitute and a scaffold for bone tissue engineering.


2012 ◽  
Vol 529-530 ◽  
pp. 300-303 ◽  
Author(s):  
R.P. Félix Lanao ◽  
J.W.M. Hoekstra ◽  
Joop G.C. Wolke ◽  
Sander C.G. Leeuwenburgh ◽  
A.S. Plachokova ◽  
...  

Periodontitis is one of the most common inflammatory diseases, which can lead to early tooth loss. The conventional treatment of periodontitis is to arrest the disease progression. Most reconstructive procedures involve application of bone substitutes, barrier membranes or a combination of both into the bony defects. Calcium phosphate cements (CPCs) are the predominant type of bone substitute material used for reasons of injectability and hence perfect filling potential for bone defects. Recently, injectable apatitic CPCs demonstrated to be more rapidly degradable when combined with poly (lactic-co-glycolic) acid (PLGA) microspheres. Further, PLGA microspheres can be used as a delivery vehicle for growth factors. In this study, the performance of injectable CPCs as a bone substitute material for alveolar bone defects created in Beagle dogs was evaluated. Four CPC-formulations were generated by incorporating hollow or dense PLGA microspheres, either or not loaded with the growth factors (platelet derived growth factor (PDGF) and insulin-like growth factor (IGF). Implantation period was 8 weeks. Bone formation was based on histological and histomorphometrical evaluation. The results demonstrated that filling alveolar bone defects with CPC-dense PLGA revealed significant more bone formation compared to CPC-hollow PLGA either or not loaded with IGF and PDGF. In summary, we conclude that injectable CPC-dense PLGA composites proved to be the most suitable material for a potential use as off the shelf material due to its good biocompatibility, enhanced degradability and subsequent bone formation.


2006 ◽  
Vol 2 (5) ◽  
pp. 557-565 ◽  
Author(s):  
Hua Liu ◽  
Hong Li ◽  
Wenjun Cheng ◽  
Yuan Yang ◽  
Minying Zhu ◽  
...  

2011 ◽  
Vol 30 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Ching-Lien HUNG ◽  
Jen-Chang YANG ◽  
Wei-Jen CHANG ◽  
Chih-Yuan HU ◽  
Yong-Ho LIN ◽  
...  

2017 ◽  
Vol 19 (5) ◽  
pp. 802-811 ◽  
Author(s):  
Marcelo José Uzeda ◽  
Rodrigo Figueiredo de Brito Resende ◽  
Suelen Cristina Sartoretto ◽  
Adriana Terezinha Neves Novellino Alves ◽  
José Mauro Granjeiro ◽  
...  

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