Made in USA

TECHNICAL BULLETIN

INSTRUCTIONS

 

L-SHA

VISIBLE LIGHT-CURED PAINT-ON RESTORATIVE

 

A new, highly polishable restorative, which offers the handling convenience of Light-Cured materials, combined with outstanding

aesthetics, color stability, durability and versatility.

 

CONTENTS

       

3 g-Shade A-1 (Light)

3 g-Shade A-2 (Universal)

3 g-Universal Opaque

3 g-Shade A-3.5 (Brown)

3 g-Shade B-3 (Yellow)

3 g-Shade C-1 (Light Grey)

5 g-Porcelain Conditioner

5 g-Enamel Conditioner-Etching Agent

Accessories and Instructions

 

This product is recommended for cementing fabricated laminate veneers, restoring acrylic veneers, minor defects in porcelain veneers,

 and for use in Class III and Class V restorations and for limited use in Class I restorations in premolars and selected Class IV restorations

 where aesthetics is of primary importance.

                                 

 

OUTSTANDING FEATURES OF THE MATERIAL

High adhesive strength to etched enamel without the use of bonding agents.

Superior aesthetics due to well balanced opacity and light reflectance.

Excellent color stability.

Reduced oxygen inhibited layer contributes to the ease of finishing.

Does not require refrigeration. Shelf life in excess of two years.

Fast in application – one component restorative system.

Excellent flow of the material facilitates application.

SYMBOL 183 \f "Symbol" \s 8 \h        May be cured with any dental curing instrument operating in the visible range.

PROPERTIES OF THE MATERIAL

L-Sha is a flowable light cure restorative composite material based on BIS-GMA.

FILLER SPECIFICATIONS

COMPOSITION: Blend of radiopaque and fluoride releasing glass

PARTICLE SIZE: Blend of micro and sub micron particles.

PERCENT MASS: 62-72 %.

                                          PHYSICAL PROPERTIES

 

 

Compressive Strength

Diametral Tensile Strength

Flexural Strength

Water Absorption

Water Solubility

220 MPa

43 MPa

110 MPa

<10 µg/mm³

< 1 µg/mm³

 

 

 

 

 

INSTRUCTIONS

 

RESTORATION OF DEFICIENT ENAMEL

1. Prepare the surfaces of the teeth by prophylaxis, using anon-fluoride prophy paste. Wash and dry. Apply enamel conditioner with a

    cotton pledget to the enamel area to be restored.

CAUTION: Avoid contact with soft tissue or exposed dentin. If accidental spill occurs, wash immediately.

2. Wait 90 seconds. Wash the tooth (teeth) and evacuate. Dry with oil-free air or with any commercial dental drying agent. Properly

    conditioned (etched) teeth should have a dull, chalky-white appearance. Highly mineralized teeth may require an additional one to

    two-minute etching to achieve this effect.

3. Isolate the tooth (teeth) to be restored. Select the desired shade of the restorative and dispense onto a mixing pad.

4. Using a disposable brush, apply a thin, smooth layer over the etched, dry enamel and cure for 20 seconds*, holding the tip of the

    light no farther than 2mm from the tooth surface.

5. Wait two minutes before finishing. Abrasives for composites, cones, points, and discs with fine corundum are especially recommended.

     

   

 

 

 

 

 

HEAVILY DISCOLORED TEETH

On heavily discolored teeth (for example, in cases involving discoloration caused by radiological treatment, tetracycline stains,

fluorosis, etc.), the application of an opaque, masking layer is recommended. A universal shade opaque is enclosed in the L-Sha kit. 

After cleaning and etching as described above, a thin layer of the opaque is painted on as an under layer and cured for 20 seconds,

followed by the application of the final coating. The final coating should be applied over the piquing layer immediately after the cure

of the latter. For best adhesion, the piquing layer should be left unfinished or its surface should be roughened.

 

RESTORATION OF ACRYLIC VENEERS

1. Roughen the surface to be restored. Wash away the debris and dry with oil-free air. If a relatively large area of metal base of the cast

    restoration is exposed, the use of the APOLLO is not recommended.

2. Proceed as outlined in points 3-5 of the instructions for restoring enamel (above).

 

RESTORATION OF PORCELAIN VENEERS

1. Roughen the porcelain to be restored with a diamond bur. If gold or non-precious alloy is exposed, extend the restoration over a

    relatively large area of porcelain, ground down to a featheredge around the chipped area. Wash away the debris and dry with oil-free

    air or a dental drying agent.

2. Using a disposable brush, apply a thin layer of Porcelain Conditioner to the prepared porcelain and wait two minutes. Dry with a

    gentle stream of oil-free air. *Any commercial curing instrument is suitable for use with L-Sha. Some curing instruments have,

    however, a very small diameter tip. The area covered by the light emitted from such tip may be smaller than the area of the restoration.

    In such cases, the tip of the light should be moved from place to place in order to assure that every fragment of the restoration has

    been directly irradiated for at least 20 seconds.

3. Proceed as outlined in points 3-5 of the instructions for restoring enamel.

 

CEMENTING OF FABRICATED LAMINATE VENEERS

Appointment 1

1. Select the shade for the veneer.

2. Place gingival deflection cord on facial areas of teeth.

3. Decide on amount of enamel to be removed.

4. Make an impression using any elastomer-type impression material or reversible hydrocolloid. Polyvinylsiloxane impressions are

    preferred, because the refractory material may be cast directly into them.

Comment: Temporary coverage of teeth is usually not needed. However, when used, do not use Eugenol-containing cements.

Appointment 2

1. Make any necessary correction in the veneer to assure good fit. Carefully wipe the surface of the veneer to be bonded with acetone, in

    order to remove oily impurities, which can interfere with bonding.

2. Place deflection cords to block tissue fluids from oozing into gingival margins.

3. Prepare tooth surface by following steps 1 and 2 for Restoration of Deficient Enamel.

4. In case of the use of a ceramic veneer, apply a thin layer of Porcelain Conditioner to the clean surface of the veneer and wait one

    minute. Blow dry.

5. Place mylar strips on both side of the tooth. It the tooth is heavily discolored, mask the discoloration with L-SHA opaque. Follow

    instructions for placing and curing the opaque. Apply a thin layer of the selected shade of L-Sha over the internal surface of the veneer.

6. Place the veneer on the tooth, adjust the position of the veneer and carefully remove the excess.

7. Cure for 30 seconds, placing the tip of the light directly over the veneer. Make sure the entire area of the veneer has been directly

    irradiated, as described in the instruction for Restoration of Deficient Enamel.

8. Perform final trimming, cleaning and polishing, as necessary.

 

STORAGE

 

L-SHA should be preferably stored at temperatures not exceeding 73ºF (23ºC). Under such conditions, its shelf life is at least two years.

Short periods of exposure to temperatures up to 105ºF (40ºC) are allowable. DO NOT FREEZE.

 

All kit components, accessories and auxiliaries are available separately.

 

Dent Zar, Inc.

19643 Trull Brook Dr.

Tarzana, CA 91356

U.S.A.

Head Office

Toll Free: 800-444-1241, Outside U.S. 323-465-3621

 

 

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