[Water absorption of five dental resins used in bonded restorations].
The actual restorative dentistry need to bond material which are under the constraint of saliva likely, as all liquid, to enter inside the product with time and to modify its characteristics. In this study, we compare the behaviour of five materials opposite water absorption, in vitro, until one year: two composite resins (Tetric et Pertac II), two ceromer (ceromer (Tetric ceram et Tetric flow) and one compomer (Hytac(r)). Each pastille weight is expressed in percentage of initial weight. All materials loose weight in the first hours except Tetric ceram which stay stable. At 48 h, all materials except Pertac II get back their initial weight. At long-term, all the materials are stable with a profit of 1% for Hytac, 0.5% for Tetric, Tetric ceram et Tetric flow and a loss of à 0.3% for Pertac II. As a result of this study, we understand why the clinical used of Hytac must be done following strict conditions.
Gillet
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Laboratoire Odontologique de Recherches, Université Victor Segalen Bordeaux 2, France.
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D000042:Absorption; D002516:Ceramics / Q000737:chemistry; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003793:Dental Restoration, Permanent / Q000379:methods*; D005899:Glass Ionomer Cements / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D018709:Statistics, Nonparametric; D013997:Time Factors; D014867:Water; D017155:Wettability
D020770:Compomers; D003188:Composite Resins; C113072:EBS adhesive system; D005899:Glass Ionomer Cements; D008689:Methacrylates; D010756:Phosphoric Acids; C090969:Tetric; C121818:Tetric ceram; C111841:ceromer; C105429:hytac; C452226:tetric flow composite resin; D014867:Water