February 2013, Volume 9, Issue 2
Published by AEGIS Communications
Era of a Legend: Panavia™ SA Cement
A combination of bond strength and simplicity is combined in one dual-cure, self-adhesive product.
It has been more than 60 years since investigators first began applying various strategies and approaches in the effort to achieve adhesion of restorative materials. The idea to develop a resin system capable of bonding to tooth substrate was first introduced by Swiss chemist Oskar Haggar in 1949; it was subsequently developed further through many innovations. A major breakthrough occurred in 1981 with the invention of a new adhesive monomer called 10-methacryloyloxydecyl dihydrogen phosphate (MDP) (Figure 1) by the Kuraray Co. in Japan. Since then, MDP technology has been used by Kuraray as a key in adhesive dentistry. More than 20 years since its introduction, MDP has continued to increase in popularity, causing many manufacturers to imitate and use this technology.
Soon after the development of MDP, Kuraray used this adhesive monomer to manufacture the popular Panavia-branded resin cements. Conventional Panavia resin systems require pretreatment of the tooth and/or restorative surfaces. However, through advancements of this technology, Kuraray has developed a new self-adhesive resin cement, Panavia™ SA Cement, which does not require most pretreatments to both the tooth and the prosthetic, thus making adhesive dentistry more user-friendly while keeping its high profile in adhesion.
Panavia SA Cement is a dual-cure, fluoride-releasing cement available in both a simple automix delivery system and an economical handmix system. Panavia SA Cement provides an outstanding level of adhesion to enamel, dentin, metal, and zirconia. Bond strength is virtually unaffected by the dryness or wetness of the adherent surface of the tooth structure. MDP monomers in the cement paste react with the hydroxyapatite of the tooth surface, thereby forming a nano-interaction zone created by polymerized monomer penetrating into a partially demineralized dentin (Figure 2). The high bond strength in combination with the very low water absorption rate of Panavia SA Cement leads to long-lasting marginal integrity. The special feature of this self-adhesive cement development is its unrivaled easy removal of excess cement. The result is an easier cleanup and shorter chairtime without damage to the gingiva.
The automix version offers paste dispensing directly through the mixing tip into the restoration. This fast and easy delivery system provides a satisfying experience on a daily basis. Moreover, the special “Endo tip” makes application easy when applying cement directly into a root canal. Panavia SA Cement Handmix, which does not use a mixing tip, creates less waste. The dentist just dispenses the amount needed per application; 50 to 60 crowns can be achieved with a single syringe.
Panavia SA Cement is indicated for the following: (1.) cementation of crowns, bridges, inlays, and onlays made of porcelain, ceramic, composite resin, or metal; (2.) cementation of porcelain, ceramic, composite resin, or metal restorations on implant abutments; and (3.) cementation of metal cores, resin cores, metal posts, or glass fiber posts.
The development of a highly MDP-concentrated paste for self-adhesive resin cement represents a milestone in dentistry; it offers the means to improve individual well-being, as well as the oral health of the community.
Written by Dinesh Weerasinghe, BDS, PhD
The preceding material was provided by the manufacturer. The statements and opinions contained therein are solely those of the manufacturer and not of the editors, publisher, or the Editorial Board of Inside Dentistry.
For more information, contact:
Kuraray America Co.