Composites of bovine hydroxyapatite (BHA) and ZnO

Gündüz, Oğuzhan; Erkan, Eray M.; Dağlılar, Sibel; Salman, Serdar; Agathopoulos, Simeon; Oktar, Faik N.

doi:10.1007/s10853-008-2497-1

Cited by 41 publications

(40 citation statements)

References 25 publications

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“…Simulation results showed deviation of 4% comparing to the results achieved by experimental tests [21]. Fig.…”

Section: Test Ementioning

confidence: 65%

“…The production cost is lower that of synthetic HA. Moreover, BHA accommodates several trace elements, which play an important role in biological performance of biomaterial after implantation [21][22][23][24][25]. It has been suggested that incorporation of ZnO in BHA matrix can improve mechanical (e.g.…”

Section: In Test (D)mentioning

confidence: 99%

“…Fuzzy output sets were: the density of BHA-ZnO composite (d) 1.9÷3 g/cm 3 , compressive strength (σ) 19÷75 MPa, and Vickers microhardness 49÷600 HV, based on experimental results presented by Gunduz et al [21]. Input and output space were divided into fuzzy sets, with linguistic names given: "very small (VS), small (S), medium (M), large (L), very large (VL), and very very large (VVL)".…”

Section: Test Ementioning

confidence: 99%

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Fuzzy reasoning system design and assessment of load-bearing endoprostheses and their fabrication processes

Sobieszczyk¹

2012

Archives of Metallurgy and Materials

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Five attempts of an application of a fuzzy reasoning approach to problems encountered in biomechanics and engineering of biomaterials are presented. They include: (A) assessment of maximum contact stress acting on endoprosthesis, (B) design of sintering plan to obtain a porous/scaffold implant, (C) design of oxidation plan to obtain nanotubular oxide structure on the Ti alloy, (D) and (E) design of deposition of hydroxyapatite coating on the Ti alloy. The fuzzy reasoning system is shown to well predict: the maximum contact stress estimation on acetabular surface of the load-bearing hip joint endoprosthesis for chosen and given Wiberg's angle values and patient's body weight; the optimal geometry of scaffold's architecture; the geometry of TiO 2 nanotubular layer on titanium surface and directions of the adjustment of fabrication conditions; the ratio of Ca/P and the coating crystallinity; effects of control factors (sintering temperature and content of ZnO) on mechanical properties of BHA-ZnO composite. A small deviation of the predicted values from those obtained in the course of experiments can be decreased by improvement of the proposed fuzzy model i.e. adjusting fuzzy membership functions of input and output variables.Keywords: biomaterials, fuzzy reasoning, predictionZaproponowano pięć zastosowań podejścia rozumowania rozmytego do rozwiązania problemów w dziedzinie biomechaniki oraz inżynierii biomateriałów. Obejmują one: (A) oszacowanie maksymalnych naprężeń kontaktowych działających na endoprotezę, (B) zaprojektowanie procesu spiekania dla otrzymania porowatego implantu, (C) opracowanie planu utleniania w celu otrzymania struktury nanorurkowej na stopach Ti, (D) oraz (E) zaprojektowanie osadzania powłoki hydroksyapatytowej na stopach Ti. System wnioskowania rozmytego umożliwił poprawne oszacowanie: maksymalnych naprężeń kontaktowych na powierzchnię panewki w endoprotezie stawu biodrowego przenoszącej obciążenia dla wybranych wartości kąta Wiberg'a oraz masy ciała pacjenta; optymalną geometrię architektury rusztowania implantu; optymalną geometrię nanorurkowej warstwy tlenku TiO 2 na powierzchni tytanu oraz optymalizację warunków procesu jej wytwarzania; stosunek molowy Ca/P oraz krystaliczność powłoki; wpływ określonych czynników (temperatura spiekania oraz zawartość ZnO) na włsności mechaniczne kompozytu BHA-ZnO. Zauważono niewielkie odchyłki przewidywanych wartości od parametrów uzyskanych w trakcie przeprowadzania eksperymentów, które mogą zostać zmniejszone poprzez odpowiednie dostrojenie modelu rozmytego, np. poprzez regulację rozmytych funkcji przynależności dla zmiennych wejściowych i wyjściowych.

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“…Simulation results showed deviation of 4% comparing to the results achieved by experimental tests [21]. Fig.…”

Section: Test Ementioning

confidence: 65%

Section: In Test (D)mentioning

confidence: 99%

Section: Test Ementioning

confidence: 99%

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Fuzzy reasoning system design and assessment of load-bearing endoprostheses and their fabrication processes

Sobieszczyk¹

2012

Archives of Metallurgy and Materials

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“…It can be seen that a heterogeneous coating and embedment of FAp fine particles (58 nm) onto the surface of ZnO nanorod shape particle was achieved by mechanochemical process after 5 h. Hence, we reach to an important conclusion that using suitable conditions in mechanochemical process leads to the preparation of composite nanopowders with mechanically coated particles. This new approach to mechanosynthesis of bionanocomposites has the potential to revolutionize the field of biomaterials from dental cement powders to bone repair and augmentation [21,22].…”

Section: Resultsmentioning

confidence: 99%

“…According to the literature [21], ZnO is very popular in the daily dental practice, because it is the main substitute of some polycarboxylates, in temporary dental cement powders, or in the formula of dental impression materials. In vitro studies have shown that Zn has direct, specific proliferative effect on osteoblastic cells and a potent and selective inhibitory effect on osteoclastic bone resorption.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical Synthesis of Fluorapatite-Zinc Oxide (FAp-ZnO) Composite Nanopowders

Fahami

2012

ISRN Ceramics

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Fluorapatite-zinc oxide (FAp-ZnO) composite nanopowders were successfully prepared via mechanochemical process. Characterization of the products was carried out by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) analysis, energy dispersive X-ray spectroscopy (EDX), and field-emission scanning electron microscopy (FE-SEM) techniques. Results revealed that in the absence of ZnO which produced by hydrothermal method, the single-phase FAp had high-crystalline structure with appropriate morphological features. Furthermore, after 5 h of milling in the presence of 5 wt.% ZnO, FAp-5 wt.% ZnO, composite nanopowders with no impurity phase was obtained. Structural studies illustrated that the milling up to 5 h was not accompanied by a remarkable change in the structural features. Moreover, the gained composite powders presented an average crystallite size of about 40 nm for FAp. The FE-SEM observations indicated that the experimental outcome had a cluster-like structure which consisted of several small particles. Finally, results propose a new approach to prepare commercial amounts of novel FAp-based composite nanopowders with high quality and suitable structural and morphological features.

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Biocomposites and Hybrid Biomaterials Based on CaPO₄

Dorozhkin¹

2016

Calcium Orthophosphate‐Based Bioceramics and Biocomposites

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Composites of bovine hydroxyapatite (BHA) and ZnO

Cited by 41 publications

References 25 publications

Fuzzy reasoning system design and assessment of load-bearing endoprostheses and their fabrication processes

Fuzzy reasoning system design and assessment of load-bearing endoprostheses and their fabrication processes

Mechanochemical Synthesis of Fluorapatite-Zinc Oxide (FAp-ZnO) Composite Nanopowders

Biocomposites and Hybrid Biomaterials Based on CaPO₄

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Composites of bovine hydroxyapatite (BHA) and ZnO

Cited by 41 publications

References 25 publications

Fuzzy reasoning system design and assessment of load-bearing endoprostheses and their fabrication processes

Fuzzy reasoning system design and assessment of load-bearing endoprostheses and their fabrication processes

Mechanochemical Synthesis of Fluorapatite-Zinc Oxide (FAp-ZnO) Composite Nanopowders

Biocomposites and Hybrid Biomaterials Based on CaPO4

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Biocomposites and Hybrid Biomaterials Based on CaPO₄