BisBlock^TM
Oxalate Dentin Desensitizer

GENERAL INFORMATION

BisBlock is an oxalate dentin desensitizer. Its primary purpose is to provide desensitization of the natural dentition. BisBlock's patented technique is unique because it incorporates the total-etch procedure prior to oxalate and adhesive placement. This technique provides long-lasting effects due to oxalate crystal formation deep within the dentinal tubules as opposed to other techniques utilizing oxalate which form crystals only on the surface of the tubules. BisBlock works best with adhesives such as the ALL-BOND^®* and ONE-STEP^®* Adhesive Systems.

BASIC TECHNIQUE:

• Etch the tooth (15 sec.) and rinse,
• Gently air dry 2-3 seconds,
• Apply BisBlock (allow to dwell for 30 sec.) and rinse (re-etching enamel, if enamel margin is present),
• Apply adhesive ONE-STEP PLUS or ALL-BOND 2 (per instructions) and light cure, and
• Continue with case specific procedures.

DETAILED TECHNIQUE PER INDICATION:

A. Desensitization of Exposed Root Surfaces*

ETCH:
1. Etch exposed root surface with 32% phosphoric acid, such as UNI-ETCH^®*, for 15 seconds. Rinse thoroughly with water and gently air dry 2-3 seconds so that there is no visible water on the surface of the tooth.

DESENSITIZE:
2. Apply BisBlock and allow to dwell for 30 seconds. Rinse thoroughly with water, leaving the surface slightly, but visibly, moist for wet bonding.

APPLY ADHESIVE:
3. Apply an adhesive, such as ONE-STEP or ONE-STEP PLUS. (See section APPLYING ADHESIVE.)

* NOTEWORTHY: For additional patient comfort, warm the etchant, BisBlock, rinsing water and adhesive to body temperature, prior to application.

B. Desensitization Prior to Placing Direct Restorations

ETCH:
1. 1. Etch preparation with 32% phosphoric acid, such as UNI-ETCH, for 15 seconds. Rinse thoroughly with water and gently air dry 2-3 seconds so that there is no visible water on the surface of the tooth.

DESENSITIZE:
2. Apply BisBlock and allow to dwell for 30 seconds. Rinse thoroughly. If enamel margin is present, re-etch with UNI-ETCH for at least 15 seconds. Rinse thoroughly leaving the surface slightly, but visibly, moist for wet bonding.

APPLY ADHESIVE:
3. Apply an adhesive, such as ONE-STEP, ONE-STEP PLUS or ALL-BOND 2. (See section APPLYING ADHESIVE.)
4. Continue with restorative procedure.

C. Desensitization Prior to Temporization for Indirect Restoration

ETCH:
1. Etch preparation with 32% phosphoric acid, such as UNI-ETCH, for 15 seconds. Rinse thoroughly with water and gently air dry 2-3 seconds so that there is no visible water on the surface of the tooth.

DESENSITIZE:
2. Apply BisBlock and allow to dwell for 30 seconds. Rinse thoroughly. If enamel margin is present, re-etch with UNI-ETCH for at least 15 seconds. Rinse thoroughly leaving the surface slightly, but visibly, moist for wet bonding.

APPLY ADHESIVE:
3. Apply an adhesive, such as ONE-STEP, ONE-STEP PLUS or ALL-BOND 2. (See section APPLYING ADHESIVE.)
4. Remove the oxygen-inhibited layer with an alcohol-moistened cotton pellet and make an impression.
5. Continue with temporization procedure.
CAUTION: To prevent the temporary restoration from bonding to the tooth, coat the preparation with a lubricant (glycerine or petroleum jelly), except for 1-2mm at the margins for adhesion to the temporary cement.

At Cementation Appointment:
1. Remove temporary.
2. Clean preparation with a slurry of pumice and water. Rinse and dry.
3. Utilizing 32% phosphoric acid, such as UNI-ETCH, as a cleanser, apply to preparation for 15 seconds. Rinse thoroughly and dry.
4. Apply an adhesive, such as ONE-STEP, ONE-STEP PLUS or ALL-BOND 2. (See section APPLYING ADHESIVE.)
5. Continue with permanent cementation procedures.

APPLYING ADHESIVE:

A. Applying ONE-STEP or ONE-STEP PLUS

1. With the surface visibly moist, apply a minimum of two generous coats of ONE-STEP (OS) or ONE-STEP PLUS (OS+). (To activate UNIT-DOSE VIAL, see instructions on pouch.)
2. Using a gentle stream of air, thoroughly evaporate the solvent from the OS or OS+.
NOTE: The surface should be shiny. If not, apply more OS or OS+ and evaporate solvent.
3. Light-cure for a minimum of 10 seconds.

B. Applying ALL-BOND 2

1. With the surface visibly moist, mix ALL-BOND 2 Primers A & B and apply a minimum of five generous coats.
2. Using a gentle stream of air, thoroughly evaporate the solvent from the A & B.
NOTE: The surface should be shiny. If not, apply more A & B and evaporate solvent.
3. Apply one coat of D/E Resin and air thin.
4. Light-cure for 20 seconds.

STORAGE: Do not refrigerate. Store at room temperature (22°C/72°F). See individual component labels for specific expiration dates.

PRECAUTIONS: BisBlock may cause skin sensitization in susceptible persons. In case of contact with the skin, wash thoroughly with soap and water.

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.

* BisBlock and TYRIAN are trademarks of BISCO, Inc.
ALL-BOND, ONE-STEP and UNI-ETCH are registered trademarks of BISCO, Inc.
OptiBond Solo is a trademark of SDS/Kerr
Prime & Bond and NT are trademarks of Dentsply/Caulk

BISCO, Inc.
1100 W. Irving Park Rd.
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-132R2
Rev. 5/06

See U.S. Patents:
6,406,529 & 6,506,055