PORCELAIN PRIMER is a single component silane coupling agent in an alcohol and acetone base that is used to improve the adhesive bond between porcelain and composite. Silane is a dual function monomer consisting of a silanol group that reacts with the porcelain surface, and a methacrylate group that co-polymerizes with the resin matrix of the composite. Silane coupling agents are known to enhance the wettability of glass substrates by composite resins, increase physical, mechanical and chemical bonding of composite to porcelain, and yield a greater resistance to water attack at the bonding interface.

Prior to applying silane, the porcelain repair site must be etched with PORCELAIN ETCHANT* (4% or 9.5% hydrofluoric acid). This process allows porcelain to become not only highly porous, but also highly receptive to the silane by creating reactive hydroxyl groups on the surface of the porcelain.

Indications:
A. Porcelain (silica-based) Repair
B. Bonding Etched Porcelain Restorations

Do not use this product until you have thoroughly read and understood this document. Extreme care must be taken to protect the patient, operator and assistant. These individuals must wear protective eyewear. The operator and assistant must also wear protective gloves.

A. Porcelain Repair
1. Isolate the area to be repaired with a rubber dam.

2. It is best to prepare the porcelain using a long bevel.

3. Sandblast exposed metal and/or surrounding porcelain area to be repaired for 1-2 seconds. An option to sandblasting is to abrade surfaces with a coarse diamond bur. Rinse with water and air dry.

4. BARRIER GEL* may be placed to protect areas where etching is not desired.

5. Apply PORCELAIN ETCHANT to the dried repair site. Bisco's 4% concentration requires 3-4 minutes. Bisco's 9.5% concentration requires 1-2 minutes. To evacuate hydrofluoric acid vapors, hold evacuator tip adjacent to repair site. Monitor the etch site throughout the entire procedure.
PRECAUTION: Confirm that PORCELAIN ETCHANT syringe tip is adequately placed and tightly attached. Test the etchant to confirm that it is flowing freely from the syringe tip by expressing a small amount onto a mixing pad. If there is resistance to flow, DO NOT proceed. Replace tip and test flow again before using on patient.

NOTE: Not all ceramic systems are etchable. Contact your laboratory for manufacturer's instructions. Etching times may vary with various ceramic materials.

6. Suction the area to remove the PORCELAIN ETCHANT. Rinse with copious amounts of water. Then air dry. The etched surface may appear dull and frosty. The procedure can be repeated but this is usually not necessary if instructions are carefully followed.

7. Apply 1-2 thin coats of PORCELAIN PRIMER with a brush to the etched surface of the porcelain and allow to dwell for 30 seconds. Dry with air syringe.

8. Apply an adhesive:
ALL-BOND 2^®* USERS: Mix PRIMERS A & B (1:1) in a mixing well and apply 2 coats to the prepared metal. Air dry for 5-6 seconds.
-If metal is visible, use DUAL-CURED OPAQUER*. Shake bottles well and mix base and catalyst (1:1). Apply a thin layer to mask metal. Allow to self cure or to prevent slumping, light cure for 30 seconds. Apply a thin layer of PORCELAIN BONDING RESIN* (HEMA-free resin) to porcelain and opaqued metal. Light cure for 20 seconds. Continue with step 9.
ONE-STEP^®*/ONE-STEP PLUS USERS: Dispense ONE-STEP/PLUS into a mixing well and apply one coat to the porcelain and metal. Air dry thoroughly to evaporate the solvent. Light cure for 10 seconds.
-If metal is visible, use DUAL-CURED OPAQUER. Shake bottles well and mix base and catalyst (1:1). Apply a thin layer to mask metal. Allow to self cure or to prevent slumping, light cure for 30 seconds. Apply one additional coat of ONE-STEP/PLUS to the porcelain and opaqued metal. Thoroughly air dry to evaporate the solvent. Light cure for 10 seconds. Continue with step 9.

9. Proceed with composite layering and finishing. The preferable composite should be a hybrid or nanohybrid, such as AELITE™* ALL-PURPOSE BODY. Microfilled composites are not recommended for porcelain repair.

B. Etched Porcelain Restorations
NOTE: Not all ceramic products are etchable. If the laboratory has not etched the porcelain restoration, contact the laboratory and/or the ceramic manufacturer for proper etching instructions.

1. Brush on 1-2 thin coats of PORCELAIN PRIMER to the internal surface of the etched porcelain restoration and wait for 30 seconds. Dry with air syringe.
NOTE: Surface of the porcelain will look the same prior to and after PORCELAIN PRIMER application.

2. ALL-BOND 2 USERS: Apply a very thin layer of PORCELAIN BONDING RESIN (HEMA-free resin) to the internal surface. Do NOT light cure!
ONE-STEP/ONE-STEP PLUS USERS: Apply 1 coat of ONE-STEP/PLUS. Gently but thoroughly air dry to evaporate the solvent. Do NOT light cure!

3. Continue with cementation procedures.

STORAGE: Store at room temperature (22°C/72°F). Refer to individual component labels for specific expiration dates.

PRECAUTIONS: PORCELAIN ETCHANT is a severe eye and tissue irritant. If accidentally splashed into the eye, flush with copious amounts of water for 15 minutes and seek medical attention immediately.

If PORCELAIN ETCHANT comes into contact with other tissues: rinse affected area immediately with copious amounts of water for several minutes. Injury may result if etchant is allowed to remain on the skin or mucosa for any length of time.

WARRANTY: Bisco, Inc. recognizes its responsibility to replace products if proven to be defective. Bisco, Inc. does not accept liability for any damages or loss, either direct or consequential, stemming from the use of or inability to use the products as described. Before using, it is the responsibility of the user to determine the suitability of the product for its intended use. The user assumes all risk and liability in connection therewith.

CAUTION: U.S. Federal law restricts this device to sale by or on the order of a dental professional.

* PORCELAIN PRIMER, PORCELAIN ETCHANT, DUAL-CURED OPAQUER, PORCELAIN BONDING RESIN and BARRIER GEL are manufactured by Bisco, Inc.
AELITE is a trademark of Bisco, Inc.
ALL-BOND 2 and ONE-STEP are registered trademarks of Bisco, Inc.

BISCO, INC.
1100 W. Irving Park Road
Schaumburg, IL 60193
U.S.A.
847-534-6000
1-800-BIS-DENT
www.bisco.com

CE ADMINISTRATOR
Bisico France -
Mr. Fred Picavet
L'Opera- BP. 60
13680 Lançon De Provence
France
Phone: 33-490-42-9292
Fax: 33-490-42-9261

IN-017R2
Rev. 7/06