Biocompatibility studies on glass ionomer cements by primary cultures of human osteoblasts

Glass ionomer cements (GICs) are materials largely employed in the dental field that have been considered recently as cements in orthopaedic surgery for their proven osteogenic features. The aim of this study was to compare the response of cultured human osteoblastic cells to a number of commercial...

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Bibliographic Details
Published in:Biomaterials 1996-07, Vol.17 (13), p.1351-1356
Main Authors: OLIVA, A, DELLA RAGIONE, F, SALERNO, A, RICCIO, V, TARTARO, G, COZZOLINO, A, D'AMATO, S, PONTONI, G, ZAPPIA, V
Format: Article
Language:English
Subjects:
Biocompatible Materials - toxicity
Biological and medical sciences
Cell Adhesion - drug effects
Cell Division - drug effects
Cell Survival - drug effects
Cells, Cultured
Glass Ionomer Cements - toxicity
Humans
Medical sciences
Microscopy, Electron, Scanning
Osteoblasts - cytology
Osteoblasts - drug effects
Osteoblasts - metabolism
Osteocalcin - biosynthesis
Prostheses and Implants
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Technology. Biomaterials. Equipments
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Summary:Glass ionomer cements (GICs) are materials largely employed in the dental field that have been considered recently as cements in orthopaedic surgery for their proven osteogenic features. The aim of this study was to compare the response of cultured human osteoblastic cells to a number of commercial glass ionomer cements in order to provide indications useful for the further development of formulations that have potential for use as cements or implants in repair and replacement of bone tissue. The GICs tested were: Ketac-Fil Aplicap, lonocem lonocap 1,0, GC Fuji II, GC Fuji II LC and Vitremer 3M. Several features such as plating efficiency, adhesion and morphology of the cells were studied, as well as the only specific biochemical parameter of osteoblastic phenotype, namely osteocalcin production. In addition, the colonisation of materials by osteoblastic cells was verified by means of scanning electron microscopy. Altogether, the results obtained indicate that four of the five glass ionomer cements tested are biocompatible, showing vital cells adhering to the materials, proliferating and expressing the biochemical markers of osteoblastic phenotype, whereas Vitremer 3M, although currently employed in the dental field, exhibits a great cytotoxicity toward the cells. The adverse reaction of this GIC can be attributed to the leaching of at least two components of the polyacidic phase evidenced by protonic magnetic resonance analysis (PMR), namely 2-hydroxyethylmethacrylate (HEMA), and an unidentified acidic species. The addition of pure HEMA at the same concentrations found by means of PMR to cultures of osteoblastic cells resulted in a complete cell death. Our results also show that in vitro methods employing primary cultures of human cells specific to the implant sites of prostheses are appropriate and suitable tools for evaluating biocompatibility of materials. Furthermore, this kind of approach can provide indications useful in the design of novel materials as well as in improving the characteristics of the formulations already available.
ISSN:0142-9612
1878-5905
DOI:10.1016/0142-9612(96)88683-2