D.T. LIGHT-POST^®* ILLUSION™
Radiopaque Translucent Fiber Post System

INSTRUCTIONS FOR USE

GENERAL INFORMATION

BISCO’s patented D.T. LIGHT-POST ILLUSION posts are constructed from unidirectional, pretensed, quartz fibers bound in a resin matrix. This design produces a post with flexural strength exceeding that of metal posts but with a modulus of elasticity very close to that of dentin. The low modulus dissipates stress rather than transferring and concentrating stress in the residual root structures as seen with cast or prefabricated metal posts.

The D.T. LIGHT-POST ILLUSION is a color coded post for easy identification. However, the color intrinsically disappears when placed in the canal leaving an aesthetically pleasing translucent post. The color can reappear on demand with a cold water spray to aid with post removal in the event the tooth requires future retreatment.

Due to its translucency, BISCO’s D.T. LIGHT-POST ILLUSION will transmit light and can be used with light-cured or dual-cured cements and adhesives. This post will intimately bond to the tooth structure and core build-up composite while its passive taper respects morphology and conserves tooth structure.

CLINICAL PROCEDURE

These instructions must be followed for validation of the optional 6 year limited warranty on D.T. LIGHT-POST ILLUSION.

PRECAUTION: Gloves must be worn when handling the D.T. LIGHT-POST ILLUSION since the oils on the skin affects the bond strength of the post and the post fibers may irritate the skin.

NOTE: If bonding agents, cementation materials and core materials, other than those identified in these instructions are used, please refer to the manufacturer’s instructions for guidance.

With the tooth endodontically treated and filled with gutta-percha, the remaining tooth structure is prepared according to conventional principles.

1. SELECTION OF POST SIZE

- Size #0.5 Post: Black
Pre-Shaping Drill: Black

- Size #1 Post and Drill: Red

- Size #2 Post and Drill: Yellow

- Size #3 Post and Drill: Blue
    

A. Size and direction of canal is determined by radiographic examination. A mylar radiographic guide showing the various sizes of the posts is included with each system kit.

B. A general recommendation can be followed for post size selection:      

• Post #0.5 - Central and lateral mandibular incisors
  Anywhere else deemed appropriate for this size

• Post #1 - Central and lateral mandibular incisors
  Mesial and distal canals of maxillary molars
  Maxillary and mandibular premolars
  Mesial canals of mandibular molars
  
  
• Post #2 - Lateral maxillary incisors
  Distal canals of mandibular molars
  Palatal canals of maxillary molars
  Maxillary and mandibular canines
  
  
• Post #3 - Maxillary centrals and canines
  Palatal canals of maxillary molars
  Distal canals of mandibular molars
  Large/wide canals

2. CANAL PREPARATION

A. General recommendations for post space preparation:     
                       
            • The post should be 2/3 to 3/4 of the length of the root.
            • A minimum of 3-5mm of gutta-percha should remain at the apex.            
            • Proper isolation must be used.

B. Remove gutta-percha with a #1 or #2 Peeso Reamer, #3 Gates Glidden or a heated endodontic plugger.

C. Shaping the canal:
           
(1) Use the D.T. Pre-Shaping Drill (black) to complete the preliminary preparation. Sodium hypochlorite may be used in the canal as a lubricant, coolant and cleanser with the drill. This instrument determines the final depth to which the post will be placed and serves to guide the final preparation with the subsequent drills.

(2) An endodontic rubber stopper on the shaft of the drill should be used as a guide for determining the length of the preparation with radiographic verification. In order to ensure against root perforation while drilling, make sure the drill is always positioned within the canal.                 

(3) Remove debris from the canal with water followed by drying with paper points.

D. Final canal preparation:             
                       
(1) Use the D.T. Drills in order, starting with the smallest, until the desired final size is accomplished.                                             

PLEASE NOTE: Posts require the sequential use of the drills as follows:

• Size #0.5: Use only the Pre-Shaping Drill (black), no additional use of other drills needed.

• Size #1: Use the Pre-Shaping Drill (black),     
followed by the size #1 Drill (red).                                             

• Size #2: Use the Pre-Shaping Drill (black),
followed by the size #1 Drill (red),
followed by the size #2 Drill (yellow).                                        
                                                           
• Size #3: Use the Pre-Shaping Drill (black),
followed by the size #1 Drill (red),
followed by the size #2 Drill (yellow),
then the size #3 Drill (blue).

(2) Ideally, the final canal preparation allows sufficient space for the post and 30 microns around the post for bonding materials.

3. DETERMINING POST LENGTH

A. Try-in the post and determine the overall length required.
           
B. Remove the post from the canal and cut with a diamond bur or diamond disc.
                       
WARNING: Never use pliers to cut the post since the pressure can destroy the structure of the post. In addition, surface alteration of the post (sandblasting or roughening with a bur) is contraindicated.  

4. POST CEMENTATION
           
When using DUO-LINK™* (Resin Cement) and ONE-STEP^®*/ONE-STEP PLUS (Adhesive)

PRECAUTION: Do not clean the canal using hydrogen peroxide as it may inhibit bonding.

A. Post Space Preparation:                                
                       
(1) To the canal, apply a phosphoric acid etchant such as UNI-ETCH^®* w/BAC for 15 seconds and rinse with water.                             

(2) Blot the canal with a paper point to remove excess moisture.

(3) Apply 2 coats of ONE-STEP/ONE-STEP PLUS to the walls of the canal using an ENDO APPLICATOR.

(4) Blot the canal dry with paper points until the paper point returns dry from the canal.

PLEASE NOTE: The paper point step is important for removal of any pooled adhesive so that there is no interference in complete seating of the post.

(5) Light cure ONE-STEP/ONE-STEP PLUS for a minimum of 10 seconds at 500 mW/cm². Position the light as close as possible to the canal opening. Light access is necessary for curing ONE-STEP/ONE-STEP PLUS in the canal.    

B. Post Cementation:                             
                       
(1) Coat the post with ONE-STEP/ONE-STEP PLUS and light cure for 10 seconds at 500 mW/cm².
                                   
(2) Thinly coat the post with DUO-LINK and then apply DUO-LINK to the canal using the Dual-Syringe:

a. Remove the Dual-Syringe cap and express some material to confirm that the syringe is free of voids.

b. Attach the root canal tip to the mixing tip and then attach mixing tip to Dual-Syringe.

c. Express DUO-LINK directly into the canal working in an apical to coronal direction.

(3) Quickly seat the post into the canal. Maintain firm pressure for 5-10 seconds once the post is seated.                                    
           
(4) Remove excess cement and light cure for 40 seconds at 500 mW/cm² by placing the light tip on the post.

(5) Once the cement has set, proceed with the core build-up.

When using BisCem^®* (Self-Adhesive Resin Cement)
           
PRECAUTION: Do not clean the canal using hydrogen peroxide or EDTA as it may inhibit bonding.
           
A. Post Space Preparation:                                
                       
(1) Thoroughly rinse the canal with water.                           
           
(2) Blot the canal dry with paper points.

B. Post Cementation:                             
           
(1) Thinly coat the post with BisCem and then apply BisCem to the canal using the Dual-Syringe:                     

a. Remove the Dual-Syringe cap and express some material to confirm that the syringe is free of voids.

b. Attach the root canal tip to the mixing tip and then attach mixing tip to Dual-Syringe.

c. Express BisCem directly into the canal working in an apical to coronal direction.

(2) Quickly seat the post into the canal. Maintain firm pressure for 5-10 seconds once the post is seated.

(3) Remove excess cement. (To aid in excess cement removal, initially light cure the cement for 2–3 seconds). Light cure for 20–30 seconds at 500 mW/cm² by placing the light tip on the post.

(4) Once the cement has set, proceed with the core build-up.           

5. CORE BUILD-UP

If using LIGHT-CORE™* (Light-Cured Core Material) and ONE-STEP/ONE-STEP PLUS (Adhesive)

(1) Clean all surfaces that will receive the core material (including the post) with a slurry of pumice and CAVITY CLEANSER™* (disinfectant) or pumice and water. Rinse and dry.

(2) Etch the tooth structure for 15 seconds using a phosphoric acid etchant, such as UNI-ETCH w/BAC.            

(3) Apply 1–2 coats of ONE-STEP/ONE-STEP PLUS. Gently air dry to evaporate the solvent. Light cure for 10 seconds at 500 mW/cm².

(4) Dispense desired amount of LIGHT-CORE onto a light-protected mixing pad by turning the syringe handle clockwise.

NOTE: To prevent excessive material from extruding from syringe, turn handle counterclockwise immediately after the desired amount is dispensed.

(5) Place core material into the preparation (and around post) in increments (not to exceed 5mm).

(6) Light cure each increment for a minimum of 20 seconds at 500 mW/cm². (Or a minimum of 30 seconds if using LIGHT-CORE BLUE).

6. FINAL PREPARATION

Conventional principles of tooth preparation (with proper ferrule) must be followed for optimal results.

— Preparation for final restoration must end on sound tooth structure.

— There must be 1.5mm of sound tooth structure beyond the core material.

— Positive horizontal and vertical walls should exist.

7. POST REMOVAL

The D.T. LIGHT-POST ILLUSION greatly aids in the post removal process in the event retreatment is required. A cold water spray on the post during the removal process causes the color to reappear in the post allowing visibility to ensure the entire post has been fully removed. A D.T. LIGHT-POST REMOVAL KIT is available through BISCO. See POST REMOVAL TECHNIQUE description and instructions available with the D.T. LIGHT-POST REMOVAL KIT. (X-80692P)

* Unapproved sterilization may render the post unusable.

STORAGE: Store all components except BisCem at room temperature (20°C/68°F - 25°C/77°F). Refrigerate BisCem when not in use (2°C/36°F - 8°C/46°F). DO NOT STORE IN DIRECT SUNLIGHT OR ARTIFICIAL LIGHT. See individual component labels for specific expiration dates.

PRECAUTION: Unpolymerized resins may cause skin sensitization in susceptible persons. In case of contact with the skin, wash thoroughly with soap and water. Phosphoric acid of UNI-ETCH is a severe eye irritant and tissue irritant. If accidentally instilled into the eye, flush with copious amounts of water and seek medical attention immediately. In case of contact with other tissues, rinse immediately with plenty of water for several minutes. Injury may result if UNI-ETCH is allowed to remain on the skin or mucosa for extended periods of time.

WARRANTY: BISCO, Inc. recognizes its responsibility to replace products if proven to be defective. BISCO, Inc. does not accept liability for any damage 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. Optional 6 year limited warranty is available.

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

                       
Patents: EP 1 115 349, EP 0 432 001, EP 1 776 933, U.S. 5,328,372, U.S. 5,890,904 & Patents Pending.

* D.T. LIGHT-POST is a registered trademark of RTD France.
D.T. LIGHT-POST ILLUSION is developed by RTD France.
DUO-LINK, LIGHT-CORE and CAVITY CLEANSER are trademarks of BISCO, Inc.
ONE-STEP, UNI-ETCH and BisCem are registered trademarks of BISCO, Inc.
U.S. only.

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-165R1
Rev. 8/08