The porcelain laminate veneer is a conservative alternative to complete coverage for improving the appearance of an anterior tooth.
What is the laminate veneer?
The porcelain laminate veneer is a conservative alternative to complete coverage for improving the appearance of an anterior tooth. Laminate veneers have evolved over the last several decades to become one of esthefic dentistry’s most popular restorations. A porcelain laminate veneer is an extremely thin shell of porcelain appfied directly to the tooth structure. Tooth preparation is minimal, remaining within enamel. The restoration derives its strength from the ability of a resin composite resin luting agent with a silane coupling agent to bond with etched porcelain and etched enamel.
Indications for laminate veneers include enamel hypoplasia, tooth discoloration, intrinsic staining (such as tetracycline staining}, fractured teeth, clositre of diastemas, and correction of anatomically malformed anterior teeth. When patients are selected appropriately, this method of restoring teeth appears promising, although few long-term results have been reported.
Marginal Discoloration and Loss of Color Stability
The least common problems associated with porcelain laminate veneers are marginal discoloration and loss of color stability. These problems seldom occur because all margins are in cleansable areas often easily finished and polished at the time of cementation and the glazed porcelain surface, which is mostly impervious to extrinsic stain, also protects underlying light-cured (more color stable) resin cement.
Laminate Veneer Technology
Etched laminate veneer technology has demonstrated long-term clinical success. It has proved to be one of the most successful modalities of treatment that modern dentistry has to offer. The relatively few difficulties that have been encountered may be circumvented or eliminated if the practitioner pays close attention to detail. Development of new products and materials is expected to bring longer term success. Modern-day restorations offer great promise for the expanded use of the etched porcelain/resinbonded system for inlays, onlays, crowns, and simple bridges if the ability of bonding to dentin is respected and further researched. Evidence based principals need to determined and followed, like what has been done with laminate veneer bonding to enamel.
Cohesive Failure and Repair
Another rare occurrence is the cohesive failure of either the tooth or the porcelain. In the first instance, the fracture of the underlying tooth is usually the result of poor judgment in selection of the tooth to be veneered. Vital anterior teeth with large existing restorations on the mesial and distal surfaces might be better served with full-coverage porcelain restorations bonded to the additional surface area of the crown preparation on dentin. Nonvital anterior teeth that have at least one surface with large existing restoration and an average-to-large lingual access from root canal therapy should be considered for post core and full-coverage porcelain crowns.
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