Durelon – carboxylate cement for fixation and lining

durelon
Durelon is a carboxylate cement for fixation and lining.

Two variants of the powder,“normal curing” and “fast curing”, and two consistencies of the liquid, “universal” and “low viscosity”, are available.

Two delivery versions of the “universal” liquid, dropper bottle and dosing syringe, are available. The “low viscosity liquid” is available with a dropper bottle only.

Either of the powder variants and the “universal” liquid may be used for lining. Any of the combinations can be employed for fixation.

Indications

  • Cementation of inlays, onlays, crowns, and bridges made from metal or metal-ceramics or veneered with composite
  • Cementation of inlays, onlays, crowns, and bridges made from composite or ceramics provided these are suitable for conventional cementing
  • Cementation of pins and screws provided these are suitable for conventional cementing
  • Cementation of orthodontic bands
  • Linings

Durelon is not suitable for cementation from/to titanium-based restorations, since cement discoloration can occur on the points which come into contact with titanium.

Preparation

  • To provide for optimal adhesion, carefully clean enamel, dentin, and the restoration to be cemented. Blow the cavity dry in only 2-3 intervals with water and oil-free air or dab dry with cotton pellets. Do not overdry!
  • The cavity should be just so dry that the surface has a semi-gloss appearance. As is the case with every type of cement, overdrying can result in post-operative sensitivity.
  • Dry the surfaces of the restoration with air.
  • Avoid further contamination by saliva.

Pulp protection
To prevent pulp irritation, cover areas in vicinity to the pulp by applying small amounts of hardsetting calcium hydroxide material prior to taking an impression for the final restoration.

Durelon – Dosing

Powder:

  • Assemble the dosing rod prior to use.
  • Press the dosing rod into the powder, and then remove excess powder with some instrument.
  • Dose the powder onto a mixing block or glass plate by lightly tapping the dosing rod.
  • Avoid underdosing the powder (especially in free dosing), since this may impair the quality of the cement.

Liquid Dropper Bottle:

  • Holding the bottle vertically, dispense single droplets next to the powder by lightly squeezing the bottle.
  • Recap the bottle immediately after use.

Liquid Dosing Syringe:

  • Insert the enclosed plunger and dose the desired number of scale units.
  • Keep the plunger for subsequent use with other syringes.
  • Reseal the dosing syringe immediately after use.

Mixing ratio
1 dose powder Durelon = 1 dosing rod filling.
1 dose liquid = 1 drop from the bottle or 1 small scale unit from the dosing syringe.
Durelon

The following powder/liquid mixing ratios apply:

  • for fixations: 0.15 g powder :0.10 g liquid universal or
  • 0.20 g powder :0.10 g liquid low viscosity,
  • for linings:     0.25 g powder :0.10 g liquid universal.

These quantities are not identical to the quantities required for one application!

Mixing
Mix Durelon at an ambient temperature of 20-25°C/68-77°F with a metal spatula. Place all powder into the liquid in one move and mix until a homogeneous consistency is attained.

Durelon – Application

–   Protect the working area from water and saliva during the application and setting phase.

–   Coat neighboring teeth or crowns with Vaseline to make removal of excess material easier.

–   Apply a thin layer of cement to the internal surface of the crown and the prepared tooth.

– Do not overfill the crown as hydrostatic pressure in tightly fitting crowns may lead to discomfort of the pulp.

–   Then seat the restoration.

–   Wash metal instruments with cold water before Durelon has set.

Times
The following times are valid at an ambient temperature of 23°C/73°F and 50% relative humidity:

indic2

Processing times are shortened at higher temperatures and prolonged at lower temperatures than those stated (e.g., mixing on a chilled glass plate). Using a larger quantity of powder also shortens the processing time. Exceeding these processing times (apparent by the matte surface of the paste) leads to a loss of adhesion to enamel and dentin.

Removing Excess Material

  • To simplify cleaning, remove any excess material shortly before definitive setting of the material using an instrument. Be careful to avoid pulling any material from the seam.
  • After the setting time has elapsed remove any remaining excess material, e.g., with a probe.

After Removal of Excess and Setting

  • Examine carefully the sulcus of the treated teeth and the surrounding area; remove any remaining cement residues.

Notes

  • Dose the liquid directly prior to mixing to avoid the evaporation of ingredients.
  • Powder and liquid bottles and the dosing syringe should be carefully resealed after use.

Storage and Shelf-life
Store the product at 15-25°C/59-77°F.
Do not use after the expiration date.

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