Keram&Keramik Ec Bond - Porcelain Bonding 20gr

EC Bond — Porcelain Bonding 20 g

Area of use

Bonding material that provides strong adhesion of porcelain to metal frameworks, especially those produced by the laser sinter technique. It can also be used on frameworks made by induction or open casting methods.

Features

• Fine-grained structure allows very easy application
• After firing it forms a yellow-orange color providing excellent pre-opaquing
• Creates resistance to intraoral stresses so porcelain does not separate from the metal
• After firing the surface is rough and textured, helping the porcelain opaquer spread easily and adhere better physically
• Covering property does not create thickness on the metal surface after application
• Can be used safely with any brand of metal and porcelain powder
• Recommended working liquid is K&K standard or extra creamy opaquer liquid
• Recommended sintering values must be followed for best results

Packaging

20 g powder in plastic jars.

Background

With laser-sintered crowns and bridges, calibration loss can reduce laser power and cause micro-cracks that enlarge during porcelain sintering. High laser power can also cause micro metal burns with the same negative effects. EC Bond is designed to tolerate such micro-cracks and eliminate these adverse effects.

EC Bond is a powder material in micro thickness (0.01 to 0.02 mm) for sintered porcelain retention on conventional dental metal alloy crown constructions. Oxide-absorbing materials in its structure absorb the oxide layer on the metal so the glassy binder portion bonds more strongly to the remaining oxide-free metal.

Application area

Used on chrome-cobalt frameworks in metal-ceramic crown and bridge work. EC Bond forms different tones from gold-yellow to orange depending on the metal oxide density.

Instructions — metal preparation

• Blast with aluminum oxide grit
• Clean in an ultrasonic bath, by boiling in pure water for 10 minutes, or with steam
• Dry the metal construction completely and contact only with a clean brush
• Mix EC Bond with Standard or Extra Creamy Opaquer Liquid to a creamy consistency
• Apply thinly and homogeneously on the metal and sinter in the recommended program

Recommended sinter program

• Preheat: 500 C
• Pre-dry time: 4-5 minutes
• Rate: 100 C per minute
• Vacuum start: 500 C
• Vacuum end: 980 C
• Maximum temperature: 980 C
• Hold at maximum: 1 minute
• Continue with the opaquer firing cycle recommended by the porcelain manufacturer

Possible problems and solutions

• Separation from metal: blast after finishing; oxidize then blast again before bonding; avoid excessive oxide; use adequate grit; follow the sinter program (especially rate and max 980 C); avoid repeatedly casting the same metals
• Bonding applied too thick: thick areas and build-ups can crack and separate
• Insufficient pre-dry time: too short pre-dry can make the bonding layer swell or form bubbles and lift from the metal

Safety

• Skin contact: normally does not irritate skin; wash immediately with plenty of water and soap
• Eye contact: rinse continuously with plenty of running water
• Swallowing: seek medical help if needed
• Storage: keep tightly closed in a dry place