In this study, the solubility of 3D-printed restorations made of VarseoSmile Crown plus were tested, since the dimensions, color, and in very unfavorable circumstances even the mechanical properties of composite restorations may be affected by the extraction (= leaching) of components.
Solubility is of great importance in the evaluation of biocompatibility. When substances formed from processes of dissolution with saliva are released into the oral cavity, undesired biological reactions (allergic or toxic) may be triggered. The extent of such reactions depends on the type and quantity of the released substances, amongst other things.
The solubility of composites is determined through extraction tests. To this end, test specimens made of VarseoSmile Crown plus, which were manufactured under serial conditions, were stored in a solvent for one and three days. Different polar solvents (water and ethanol) were used in order to simulate various saliva compositions.
The eluates (= solutions) obtained in this manner were analyzed via gas chromatography – mass spectrometry (GC-MS) for composite constituents that entered the solution. GC-MS is an analysis method with extremely low detection limits for organic substances.
For VarseoSmile Crown plus, the tests yielded no evidence of constituents having entered the solution, regardless of solvent used. Thus, there is only an exceedingly low risk of undesired biological reactions.
Under the study conditions selected, VarseoSmile Crown plus yielded no substances in the detectable area. Therefore, the risk of conceivable risk to patients, e.g. through allergies, can be classified as exceedingly low.
The above information is based on a scientific study of the solubility of VarseoSmile Crown plus, conducted by:
International Advising Centre for the Compatibility of Dental Materials (BZVZ) of the Ludwig-Maximilians-Universität München, Germany
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