GAP Australasian Dentist Mar Apr 2020

22 Austràlàsiàn Dentist proàuàtà A Breakthrough from the innovators of adhesion and silane technology By Dinesh Weerasinghe, BDS, PhD, Senior Technical and Marketing Manager, Dental Division, Kuraray America It has been more than 60 years since investigators first began applying various strategies and approaches in an 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 further developed through many innovations. A major breakthrough occurred in 1981 with the invention of a new adhesive monomer called 10-meth-acryloyloxydecyl dihydrogen phosphate (MDP) by Kuraray Co. Ltd, in Japan. Since then, MDP technology has been used by Kuraray as a key technology 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 pre-treatment of the tooth and/or restorative surfaces. Depending on the type of prosthetic material (eg. Lithium disilicate, Zirconia), dentists should learn how to properly pre-treat before cementation to achieve optimal adhesion. Hydrofluoric acid etching, followed by silanisation, is a routine clinical protocol to durably bond to glass ceramics. For dental zirconia, acidic monomer (10-MDP) pre-treatment is required for optimal adhesion. Due to the confusion of these specific pre-treatment methods, many dentists preferred resin-modified glass ionomers that required no pre-treatment. However clinically, glass ionomers provided inferior bond strengths and poor marginal sealing, compared to resin cements. In 2019 at IDS in Germany, Kuraray Noritake Dental introduced PANAVIA SA Cement Universal, the world’s first cement containing the unique Long Carbon-chain Silane (LCSi) monomer and MDP built into the cement paste, which excludes the need for a separate primer. This allows dentists to cement all restorative materials without any confusion about which pre-treatment to use for a given type of prosthetic material. Kuraray Noritake Dental uses smart technology to stabilise our newly developed silane by keeping the hydrophobic and hydrophilic components in separate compartments of the syringe. Furthermore, the catalysts and accelerators in the cement have a unique chemistry, which enables the dentist to remove excess cement very easily. PANAVIA SA Cement Universal provides the features of glass ionomers and Kuraray’s legendary adhesive technology which brings the value of resin cementation to dentists and patients for durable restorations. For more information visit www.kuraraynoritake.com – email rhonda@morita.com.au or phone 0488 002 029. àew àroducts from Kuraray àoritake Dental Less technique sensitive Rely on the proven CLEARFIL pedigree Virtually eliminates post-op sensitivity Superior bond strength over other leading universal bonds Universal Bond Quick from the makers of CLEARFIL ™ SE Bond 2 FREE TRIAL clearfil.com.au/trial PANAVIA SA Cement Universal’s MDP and silane are stabilsed in hydrophilic and hydrophobic compartments, respectively, for stable room temperature storage. PANAVIA SA Cement Universal (Kuraray Noritake Dental) can cement all restorative materials without the need for a separate primer.