The Best of Both Worlds: A New Self-Adhesive Resin Luting Cement
Stephen Poss, DDS
Manufacturers of resin cements often field questions concerning indications and contraindications, delivery systems, handling, working time, dentinal conditioning, and more. One product, G-Cem Self-Adhesive Resin Luting Cement (GC America, Inc, Alsip, IL), is a dual-cured cement indicated for a range of restorations: metal/porcelain-fused-to-metal (PFM); all-ceramic inlays, onlays, crowns and bridges; composite crowns; and prefabricated metal, fiberglass, and ceramic endodontic posts. Its capsule and automix delivery options provide compatibility with single and multiple units. In addition, G-Cem combines the best properties of seventh-generation resin adhesives with those of resin-modified glass-ionomer cements, resulting in chemical bonds that seal and protect moist or dry preparations. G-Cem’s mechanical properties include small particle size, resulting in minimized film thickness and accurate restorative fit.
Clinical decisions regarding product selection become less difficult with G-Cem because of its array of applications and minimized postoperative sensitivity. The following case depicts its use with a zirconia crown on an endodontically treated tooth.
A healthy 42-year-old woman presented with a missing PFM crown caused by endodontic treatment. The temporary filling was removed, and a post and core were placed (Figure 1). The first molar was prepared for an all-ceramic crown using standard impressioning and provisionalization. After laboratory processing, the pressed-ceramic restoration was placed on the laboratory model for in vitro inspection (Figure 2 and Figure 3). At the cementation appointment, the provisional was removed, and the fit and esthetics of the restoration were verified in vivo. Before cementation, the preparation was rinsed and air-dried, and the all-ceramic crown was cleaned and silanated. Translucent G-Cem was evenly distributed on the internal aspect of the crown, which was then placed on the preparation (Figure 4). With firm pressure applied, the excess cement was cleaned with a microbrush and the margins of the restoration were lightcured for 2 to 4 seconds, creating a gel state of G-Cem that rendered the excess cement easy to remove (Figure 5). To complete clean-up, floss was carefully placed through the contacts to remove any interproximal cement. Because of the type of all-ceramic case, the restoration was cured for 20 seconds per surface to ensure a stable, retentive final restoration (Figure 6).
One Cement, an Array of Applications
G-Cem Self-Adhesive Resin Luting Cement provides numerous opportunities for use by the clinician. In addition to its many indications, the unique chemistry allows for hydrophilicity while penetrating the dentinal tubules and uses hydrophobic tendencies when sealing the tooth, resulting in a functional, comfortable, esthetic restoration.
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GC America, Inc
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About the Author
Stephen Poss, DDS