Marginal adaptation of four tooth-coloured inlay systems in vivo.
This study investigates the margin quality of four different tooth-coloured inlay systems using computer-aided quantitative margin analysis under scanning electron microscopy. Three types of restorations involved chairside procedures using a commercial CAD-CAM apparatus: one type of inlay restoration was milled from preformed glass ceramic blocks, the other two inlay types were milled from preformed porcelain blocks. The fourth system was based on an experimental indirect composite inlay system. Each inlay type was luted with its respective dual-curing luting composite, which was supplied with the system. After 6 months of clinical service, all four systems revealed a significant percentage of submargination indicating occlusal wear of the luting composite. The porcelain inlays and the composite inlays luted with their respective experimental luting composite showed the best marginal adaptation. Luted glass ceramic inlays, in particular, suffered from a significantly higher percentage of inlay margin fractures (9 per cent) and marginal openings (4 per cent) than the other systems. A possible explanation is that the glass ceramic subsurface structure at the inlay-lute interface was weakened by etching with ammonium bifluoride.
Van Meerbeek
B
B
Department of Operative Dentistry and Dental Materials, Catholic University of Leuven, Belgium.
Inokoshi
S
S
Willems
G
G
Noack
M J
MJ
Braem
M
M
Lambrechts
P
P
Roulet
J F
JF
Vanherle
G
G
D000134:Acid Etching, Dental; D001185:Artificial Intelligence; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003738:Dental Cements / Q000737:chemistry; D003743:Dental Enamel / Q000648:ultrastructure; D003775:Dental Polishing; D003776:Dental Porcelain / Q000737:chemistry*; D006801:Humans; D007284:Inlays; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties
D003188:Composite Resins; D003738:Dental Cements; D003776:Dental Porcelain