Wiron light The new nonprecious PFM Alloy Dr

Wiron light The new non–precious PFM Alloy Dr. Ulrich Abend R & D Alloys

What do we expect from dental alloys? • Function (mechanical properties, processing by dental technician) • Esthetics • Biological properties – Bio compatible BEGO Dental 2 Interdentdays 2008

Wiron light Casting made simple by excellent melting properties –easy recognition of the proper moment for casting –high fluidity of the melt: reliable filling of the mould –low casting temperature: 1350 °C –reduced preheating temperature: 800°C BEGO Dental 3 Interdentdays 2008

Wiron Light in Fornax T BEGO Dental 4 Interdentdays 2008

Wiron Light torche casting in Fundor T BEGO Dental 5 Interdentdays 2008

Wiron light Easy finishing by smooth surface after casting –low temperatures during casting guarantee little reaction with investment material –thin oxides with light colour –oxides are easy and fast to remove BEGO Dental 6 Interdentdays 2008

Wiron light Reliable results by outstanding mechanical properties –high strength allows production of delicate structures –CTE optimally adjusted: normal cooling, in general –excellent bond strength for many available ceramics –Light oxide for improved aesthetics after veneering BEGO Dental 8 Interdentdays 2008

Wiron light SUMMARY Easy to cast Casting temperature: 1350 °C / 2460 °F Preheating temperature: 800 °C / 1472 °F Easy to grind Light coloured oxide For reliable results Outstanding strength Normal cooling -> www. bego. com BEGO Dental 9 Interdentdays 2008

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VM 13 Finesse Heraceram Carmen Veneered real C&B Noritake Creati on Carat BEGO Dental d. Sign 12 Interdentdays 2008

Corrosion behaviour of precious and non precious alloys

Corrosion & bio compatibility • Corrosion is the key to the bio compatibility of alloys • Reactions occur only if ions are released into the body! • The higher the amount of released ions, the higher the risk of unwanted biological reactions BEGO Dental 14 Interdentdays 2008

Chromium content Non precious alloys do not corrode because of passivation Passivation: formation of mechanical and chemical stable chromium oxide layers 20 % Chromium are necessary for stable layers! BEGO Dental

Non precious alloys (as casted) Layer formed of chromium oxide BEGO Dental

Over 4 weeks cumulated ion release [µg/cm 2] Chromium content vs corrosion BEGO Dental 5000 4500 4283 Ni 67 Cr 14 Mo 8 Ga 7 Fe 5 Ni 65 Cr 23 Mo 9, 5 (Wiron 99) Ni 61 Cr 26 Mo 11 Fe 1 4000 3500 3000 2500 2000 1383 1500 1000 500 322 98 122 15 19 Ni Cr 0 231 34 84 Mo 7 3 Ga Fe

Little booklet offer informations about allergies and testing substances. Available in German, French or English language by BEGO. To find, as well, at the BEGO - Homepage (Trainings. Center, Allergie. Compass) BEGO Dental Interdentdays 2008 18

Wiron light - beryllium-free Wiron 99 remains the BEGO premium nickel-chrome bonding alloy. Wiron 99 users are happy and should stay happy! Wiron light is designed to offer the opportunity to win new customers among the users of beryllium containing alloys! The time is right! More and more technicians will become aware of the danger in regard to beryllium and will swap their alloy. Wiron light provides among other features excellent melting properties, a lighter oxide, a biocertificate and a favourable price (less 15 % compared to Wiron 99) BEGO Dental 19 Interdentdays 2008

BEGO non-precious alloys (1) Ni-Cr Bonding alloys For acrylic veneering Wiron 99 top Wiron light medium Wirocer Plus basic BEGO Dental Wirolloy NB Wirolloy 20 Interdentdays 2008

BEGO non-precious alloys (2) Co-Cr Bonding alloys Wirobond 280 Wirobond C Wirobond SG Partial denture alloys top Wirobond LFC WIRONIUM alloys medium Wironit LA basic Wironit BEGO Dental Wironit XH 21 Interdentdays 2008

Thank you for your attention BEGO Dental 22 Interdentdays 2008