7 Multiple shades are available, as well as corresponding try-in pastes (dependent upon the manufacturer). In addition, dependent upon the type of adhesive, a silane coupling agent may be necessary for bonding to the restoration. A detailed bonding protocol may exist for success, including pretreatment of the tooth and the intaglio surface of the restoration. There are self-cure, dual-cure and light-cure versions of this cement. They have multiple indications, and each needs to be thoroughly investigated before use.
1 The two categories that will be addressed here are adhesive and self-adhesive cements.Īdhesive resin cements have been around longer than self-adhesive cements. This general classification is the most widely used classification of cements in modern dentistry. Resin cements are a general classification of cements, with many advancements creating subcategories. It is imperative that proper retention and resistance form be followed for successful cementation with RMGI cements. 5,6 They are indicated for multiple types of restorations, though reports indicate that leucite and feldspathic restorations have an incidence of fracture if luted with RMGI. RMGI cements are attractive to clinicians because they release fluoride ions, don’t require additional bonding adhesives and have little or no postoperative sensitivity. RMGI cements represent an improvement over traditional GI cements with the addition of methacrylate monomers.4 They have an improved flexural strength, are biocompatible, and although they’re classified as luting cements, they provide a greater bond than traditional GI cements. Traditional glass ionomer (GI) cements have been utilized for more than 40 years however, in the early 1990s, resin modified glass ionomer (RMGI) cements were introduced.
There is only a physical connection, no chemical connection (or bond). 2Ī luting cement merely creates a seal between the restoration and the tooth. It should also be stressed that no specific cement satisfies all the requirements of every clinical situation therefore, product knowledge is imperative. Each has not only specific indications but also specific protocols to ensure success. With variations in nomenclature, there are three main classifications of cements that are widely used and accepted in clinical practice: luting, self-adhesive resin and adhesive resin cements. Understanding the materials and cement selection is paramount for consistent predictable outcomes. The intent is to minimize stress in the decision-making process for dental cementation. This article examines the most commonly used cements, in conjunction with the most commonly used restorations. Even among materials, the type of restoration-crown, veneer, onlay, inlay, etc.-can have a profound impact on cement selection.
These restorations have evolved to a point that industry pioneers may have never imagined however, failure can occur if the restorations are not handled and cemented properly. In addition to the diverse range of cements available, dentistry has also evolved to offer many options for indirect restorations. 1 With each generation of cement come new indications, directions, handling properties and techniques. Manufacturers of dental materials have made minor changes with profound impacts in each generation of cements, which has created a highly diverse portfolio that can be confusing to decipher. This article should help clinicians make better decisions when it comes to cementation and indirect restorative dentistry.ĭental cementation has progressed dramatically since the introduction of zinc oxide eugenol in the 1850s. Cementation of indirect restorations is no exception, because several opinions exist in regard to adhesion dentistry. A practical clinical approach to understandingĬlinical dentistry is filled with many processes and decisions that ultimately determine the fate and quality of the care provided.
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