Induction of specific cell responses to a Ca(3)SiO(5)-based posterior restorative material.
OBJECTIVE
A Ca(3)SiO(5)-based cement has been developed to circumvent the shortcomings of traditional filling materials. The purpose of this work was to evaluate its genotoxicity, cytotoxicity and effects on the target cells' specific functions.


METHODS
Ames' test was applied on four Salmonella typhimurium strains. The micronuclei test was studied on human lymphocytes. The cytotoxicity (MTT test), the Comet assay and the effects on the specific functions by immunohistochemistry were performed on human pulp fibroblasts.


RESULTS
Ames' test did not show any evidence of mutagenicity. The incidence of lymphocytes with micronuclei and the percentage of tail DNA in the Comet assay were similar to the negative control. The percentage of cell mortality with the new cement as performed with the MTT test was similar to that of biocompatible materials such as mineral trioxide aggregate (MTA) and was less than that obtained with Dycal. The new material does not affect the target cells' specific functions such as mineralization, as well as expression of collagen I, dentin sialoprotein and Nestin.


CONCLUSIONS
The new cement is biocompatible and does not affect the specific functions of target cells. It can be used safely in the clinic as a single bulk restorative material without any conditioning treatment. It can be used as a potential alternative to traditionally used posterior restorative materials.
Laurent
Patrick
P
Laboratoire IMEB - ERT 30, Faculté d'Odontologie, Université de la Méditerranée, 27 Boulevard Jean Moulin, 13355 Marseille Cedex 05, France.
Camps
Jean
J
De Méo
Michel
M
Déjou
Jacques
J
About
Imad
I
D000293:Adolescent; D001641:Bicuspid; D017610:Calcium Compounds / Q000633:toxicity*; D002478:Cells, Cultured; D024042:Collagen Type I / Q000096:biosynthesis; D003738:Dental Cements / Q000633:toxicity*; D003782:Dental Pulp / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D003785:Dental Pulp Capping; D003793:Dental Restoration, Permanent; D003804:Dentin / Q000187:drug effects* / Q000378:metabolism; D016326:Extracellular Matrix Proteins / Q000096:biosynthesis; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D007381:Intermediate Filament Proteins / Q000096:biosynthesis; D008422:Materials Testing; D008963:Molar; D009152:Mutagenicity Tests; D009419:Nerve Tissue Proteins / Q000096:biosynthesis; D064231:Nestin; D010750:Phosphoproteins; D012795:Sialoglycoproteins; D017640:Silicates / Q000633:toxicity*; D014074:Tooth Calcification / Q000187:drug effects; D018675:Toxicity Tests; D000099311:Dentin Sialophosphoprotein
D017610:Calcium Compounds; D024042:Collagen Type I; D003738:Dental Cements; D016326:Extracellular Matrix Proteins; D007381:Intermediate Filament Proteins; D009419:Nerve Tissue Proteins; D064231:Nestin; D010750:Phosphoproteins; D012795:Sialoglycoproteins; D017640:Silicates; D000099311:Dentin Sialophosphoprotein; C577484:NES protein, human; C506393:tricalcium silicate