Gold inlays have for a long time been known as high quality restorations. Since dental amalgam is no longer applicable as filling material in Norway, the need for gold inlays has expanded, especially in patients having high chewing force and tooth abrasions who need replacement of their old amalgam fillings.
The cement is undoubtedly the weak point of the gold restoration. Minor misfit in the initial adaptation or direct chewing load on the marginal portion of the restoration, water-based cements can easily be worn away and give the possibility for plack retention followed by recurrent caries. Because of the cost for replacement recurrent caries is more unfortunate by the gold inlays than for the less expensive alternative materials. Placing the margins of the gold preparation in occlusal area may be unfavorable and cusp coverage is therefore used. In addition, sound tooth substance must often be removed in order to achieve sufficient mechanical retention. The result is a bulky and, to many patients, esthetically unacceptable restoration.
The goal of the survey was to see if resin based cements were suitable for cementing gold inlays, and if they could solve the problem with the vulnerable cement margin and reduce the need for extended tooth preparation.
In our study, three resin based cements were compared with zinc phosphate cement. The results showed that the cement margin did not increase with the use of resin based cement; they resisted erosive attack better and bonded the gold specimens to dentin statistically significant better than the zinc phosphate cement.
Alternative sementer til gullinnlegg
Svendsen G, Dahl JE.
Nor Tannlegeforen Tid. 2015; 125: 420–4.