Clinical Comparison Of Classical And Direct-Veneered Galvanoinlay
A. Pfitzner*, B. Sigusch, E. Glockmann
(Dept. Of Conserv. Dentistry, Univ. Of Jena, Germany)
Galvanoinlays are indicated where patients need a tooth-colored restoration of class-II cavities in posterior teeth, with the cavities approximally not bordering on enamel.
 
A study was undertaken with the objective to compare, for this indication, the classical galvanoinlay (group 1) with the direct-veneered galvanoinlay (group 2) over a period of 24 months. In the latter case, the gold frame extends only to the enamel-dentin boundary and also limits the cavity on the cervoproximal side. After cementing, the substructure was sandblasted and coated with silane and finally with a microretentive opaquer. A composite filling, porcelain or composite inlay was integrated with the metallic base by a resinous bonding composite.
 
Within a period of 24 months, both galvanoinlay versions were applied to 60 class-II lateral teeth each, with even shares of upper and lower jaw teeth. Quality was assessed at 6-month recall intervals by two independent examinators applying Ryge's criteria. In group 2, the retention rate for all inlays (gold frame/secondary filling) was 100 %, and the criteria of marginal fissure/step formation, surface homogeneity, approximal contact and aesthetics were given assessments of "very good", whereas only 50% of the inlays in group 1 were free from defects; in 35.4 % of all cases, at least one of Ryge's criteria was negative, and 15.5 % of all inlays had to be removed within the observation period because of extended veneer defects.
 
The preliminary results of the long-term clinical test show that the direct-veneered galvanoinlay proved distinctly superior to the classical version.
 
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