Mechanical properties of a permanent dental restorative material based on calcium aluminate

Abstract

This paper deals with some important mechanical properties (hardness, dimensional stability, compressive and flexural strength) of an experimental version of a translucent calcium aluminate dental restorative material. All samples investigated have been made from pre-pressed tablets, with a compaction degree of approximately 60%, hydrated using a 0.15 wt % Li salt solution as an accelerator. The samples were stored in water at 37 degrees C between the measurements. As reference materials one composite, Tetric Ceram, and one glass ionomer, Fuji II, were used with specimens prepared according to the manufacturer's recommendations. For the reference materials some of the properties were published data. The results show that the calcium aluminate material has sufficient mechanical properties to be used as a permanent dental restorative taking as a reference the ISO 9917 and the ISO 4049 as well as the reference materials. In addition the results indicate that the mechanical properties are controlled by the microstructure, which is mainly determined by the grain size of the filler.

Characterization of Calcium Aluminate Cement Phases when in Contact with Simulated Body Fluid

“…Calcium aluminate-based cement (CAC) has already been studied for biomedical applications as endodontics [2][3][4][5][6] . This material presented good physical and mechanical properties 7 , biocompatibility 8,9 and acted as a chemical and mechanical barrier against bacterial microleakage 4 .…”

“…Recent studies involving the use of CAC are based on commercial products comprising a mixture of different crystalline phases [2][3][4][5][6][7] . In vitro characterization of commercial CAC has been carried out in simulated body fluid solutions (SBF) prepared according to Kokubo's (KSBF) or Rigo's (RSBF) techniques.…”

Hydroxyapatite Formation on a Novel Dental Cement in Human Saliva

“…Attempts have been made to develop materials that promote dental remineralization of the tooth by releasing Ca 2+ and PO 4 2− ions, but so far no truly bioactive dental material has been made commercially available [4]. One material that is considered to have remineralizing properties and the necessary mechanical properties to function as a dental material is calcium aluminate (CA) [5, 6]. The main mechanism behind bioactive properties of a material has been connected to its negatively charged surface and its release of calcium, phosphate, and hydroxyl groups.…”

Synthesized mesoporous silica and calcium aluminate cement fillers increased the fluoride recharge and lactic acid neutralizing ability of a resin-based pit and fissure sealant

“…Glass-ionomer sealants, which have a high rate of becoming dislodged, demonstrate high fluoride release and recharge properties but resin materials cannot recharge with fluoride 6,7) . Calcium aluminate cements have mechanical properties that allow them to be used as bioactive direct restorative materials 8) . These materials also show potential for use for defluoridation of water 9) .…”