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Adhesion and growth of human osteoblast-like cells on aliphatic polyesters with different chemical composition, surface roughness and modification with hydroxyapatite

Vagaska B., Bacakova L., Pamuła E., Lisa V., Dobrzyński P.

Inżynieria Biomateriałów

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2006

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R. 9, nr 58-60

4-7

EN

In this study we have investigated the effect of three groups of polymeric foils on the behavior of MG 63 osteoblast-like cells. These included (1) poly(L-lactide) (PLLA) compared with newly synthesized copolymer of L-lactide and trimethylene carbonate (PLTMC 50:50), (2) three samples made of glycolide and epsylon-caprolactone copolymer (PGCap) with different surface roughness and topography, and finally (3) copolymer of glycolide with L-lactide (PGLA) compared with its modification with hyroxyapatite deposits. On the 1st and 4th day of cultivation the cell number on all of the samples was lower than on control polystyrene culture dish. However, on day 8 after seeding, the values on the tested samples caught up with the control polystyrene. In the first group the cell number of PLTMC was higher than on polystyrene or PLLA. In the second group, the number of cells on PGCap samples of the lower surface roughness (RRMS 130 and 180 nm) was significantly higher than that on the control polystyrene, whereas on the PGCap samples with the rounghness in micrometers, it was comparable to the value on the polystyrene. Moreover, the surface roughness influenced the cell adhesion area. The cells on the sample with the highest roughness index were roundly shaped and their adhesion area was significantly lower, because the cells were restricted in their spreading by the surface structure of the material. In the last group, the number of cells on day 8 on the polymer with hydroxyapatite deposits was significantly higher than on standard tissue culture polystyrene dish, as well as on unmodified PGLA foil, which suggested that hydroxyapatite supports cell proliferation.

2

Wczesny okres obserwacji bioresorbowalnego kompozytu kopolimeru P(LLA/GLA) wprowadzonego w kość udową królika : badania doświadczalne

Bajor G., Adwent M., Cieślik-Bielecka A., Starzak P., Proszek M., Chłopek J., Sabat D., Cieślik T.

Inżynieria Biomateriałów

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2004

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R. 7, nr 38-42

228-231

PL

Celem prowadzonych badań doświadczalnych jest ocena kompozytów kopolimerów polilacyd/poliglikolid w warunkach dotkankowej implantacji. Badania przeprowadzono na grupie 30 królików nowozelandzkich z okresami kontroli przypadającymi na 1, 2, 3, 6, 12, 24, 48 tydzień. Zwierzętom implantowano badane kompozyty w nasadę dalszą kości udowej, oraz tkanki miękkie grzbietu. Wykonano badania kliniczne, radiologiczne, histopatologiczne oraz morfologiczne. W kolejnych okresach obserwacji (po 3-6 tygodniu) wokół wszczepu obecna byłą dojrzała tkanka kostna.

EN

The aim of this study was evaluation of the lactide/glycolide composites with carbon fibres in vivo. The experimental study was carried out on 30 New Zealand white rabbits. The implants were placed in the femoral and soft tissues of the back. The control periods were determined as 1, 2, 3, 6, 12, 24, 48 were clinical, radiological, and histopathological and laboratory tests performed. In consecutive periods of the observations (after 3-6 weeks) round about graft has been found mature bone tissue. Preliminary study results are very optimistic and give hope for getting good material for implants. Preliminary study results are very optimistic and give hope for getting good material for implants.

3

Sześciotygodniowy okres obserwacji wszczepów P(LLA/GLA)+C wprowadzonych w kość udową królika

Bajor G., Adwent M., Cieślik-Bielecka A., Starzak P., Proszek M., Sabat D., Cieślik T.

Inżynieria Biomateriałów

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2004

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R. 7, nr 38-42

231-234

PL

Celem prowadzonych badań doświadczalnych jest ocena kompozytów kopolimerów polilacyd/poliglikolid z włóknem węglowym w warunkach dotkankowej implantacji. Badania przeprowadzono na grupie 30 królików nowozelandzkich z okresami kontroli przypadającymi na 1, 2, 3, 6, 12, 24, 48 tydzień. Zwierzętom implantowano badane kompozyty w nasadę dalszą kości udowej, oraz tkanki miękkie grzbietu. Wykonano badania kliniczne, radiologiczne, histopatologiczne oraz morfologiczne. W 3 tygodniu doświadczenia wszczep w kości udowej otoczony był przez kość, w której stwierdzono cechy aktywnej angiogenezy. Po 6 tygodniach doświadczenia kanał wszczepu pokryty był warstwą dojrzałej kości zbitej bez cech aktywności osteoblastycznej. W tkankach miękkich wszczep otaczała torebka łącznotkankowa. Wstępne wyniki wypływające z doświadczenia należy ocenić jako bardzo obiecujące dla pozyskania dobrego materiału implantacyjnego.

EN

The aim of this study was evaluation of the lactide/glycolide composites with carbon fibres in vivo. The experimental study was carried out on 30 New Zealand white rabbits. The implants were placed in the femoral and soft tissues of the back. The control periods were determined as 1, 2, 3, 6, 12, 24, 48 were clinical, radiological, and histopathological and laboratory tests were performed. Three weeks observation reveled that in the femoral implant was directly joint to the bone and active process of angiogenesis was present. After 6 weeks of the experience the graft canal were covered by mature compact bone without any osteoblast activity traits. In the soft tissues implant was surrounded by fibrous capsule. Preliminary study results are very optimistic and give hope for getting good material for implants.

4

Synteza kopolimerów glikolidu z epsilon-kaprolaktonem z wykorzystaniem niskotoksycznych związków cyrkonu

Dobrzyński P., Bero M., Kasperczyk J.

Zeszyty Naukowe. Chemia / Politechnika Śląska

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2001

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z. 146

67-70

EN

The aim of this paper is to show a new method of copolymerization of glycolide with epsilon-caprolactone with the use of low toxic zirconium (IV) compounds, namely acetyloacetonate and chloride as initiators. The use of such initiators enabled to obtain copolymers with very good, reaching 100% yield and possessing good mechanical properties. The reactivity of the initiators was defined and the chain propagation process was examined. Thanks to their properties the obtained copolymers can be successfully applied as degradable surgical implants or controlled release drug carriers.