Ivoclar Vivadent SR Nexco Paste - Manual (Page 58)

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SUBSEQUEnt adjUStmEntS
Subsequent adjustments, e.g. during cut-back or after final polymerization in the lab
Adjustments with SR Nexco components
1. roughen the areas to be adjusted with a coarse diamond or carefully blast with aluminium oxide al
2
o
3
(80–100 µm,
disposable blasting medium) at 2 bar (29 psi) pressure. Sandblasting improves the mechanical bond. this measure
roughens and thus substantially increases the surface.
2. after blasting, remove blasting medium residue with oil-free compressed air.
3. do not apply connector, Bonder or modelling Liquids to the sandblasted surfaces.
4. Immediately after blasting, apply the Sr nexco materials and precure each segment for 20 seconds with the Quick.
5. cover the entire veneer evenly with a thin layer of Sr Gel.
6. Place the restoration on the object holder.
7. conduct final polymerization (see Polymerization table).
8. after completion of the final polymerization, remove Sr Gel under running water.
9. finish and polish the restoration as described above.
Intraoral adjustments
Subsequent adjustments which may become necessary can be applied with Sr nexco material or a micro-filled direct
restorative (e.g. Heliomolar
® ). If composite materials are used for adjustments, polishing might cause a step to develop
due to the different hardnesses of the materials.
Repair/adjustments of SR Nexco veneers
Adjustments with SR Nexco material or Heliomolar
1. clean the entire veneer for shade determination.
2. adequate isolation is required, preferably with a rubber dam.
3. roughen the areas to be adjusted with a coarse diamond (80–100 µm) with water irrigation and bevel the margins.
clean the restoration with water and carefully blow dry.
4. apply Heliobond, disperse to a thin layer and light-cure for 10 seconds (e.g. Bluephase ® ).
5. Subsequently, apply the selected Sr nexco or Heliomolar materials and cure with a curing light.
6. after curing, finish the excess material with suitable finishers.
7. Use water irrigation for polishing with astropol
® or optraPol ® nG. make sure to observe the individual polishing steps
in order to obtain a smooth surface with a high gloss.
Repairing/adjusting metal areas entirely surrounded by composite
1. clean the entire veneer to determine the shade.
2. adequate isolation is required, preferably with a rubber dam.
3. roughen the areas to be adjusted with a coarse diamond (80–100 µm) with water irrigation and bevel the composite
margins. clean the restoration with water and carefully blow dry. alternatively, the metal surface may be roughened
with an intraoral sandblasting device or by means of silicoating (observe manufacturer's instructions).
4. Use a brush to apply monobond ® Plus to the areas to be adjusted and allow to react for 60 seconds. Subsequently,
dry with oil-free air.
5. apply Heliobond, disperse to a thin layer and light-cure for 10 seconds (e.g. Bluephase).
6. Subsequently, apply the selected Sr nexco or Heliomolar materials and cure with a curing light.
7. after curing, finish the excess material with suitable finishers.
8. Use water irrigation for polishing with astropol or optraPol nG. make sure to observe the individual polishing steps in
order to obtain a smooth surface with a high gloss.
Repairing exposed metal surfaces which are not entirely surrounded by composite
1. clean the entire veneer to determine the shade.
2. Use a rubber dam.
3. Bevel the margins of the areas to be repaired with a diamond grinding instrument with water irrigation. roughen the
metal surface with an intraoral sandblasting device or by means of silicoating (observe manufacturer's instructions).
clean the restoration with water and carefully blow dry.
4. Use a brush to apply monobond Plus to the areas to be repaired and allow to react for 60 seconds. Subsequently, dry
with oil-free air.
5. apply Heliobond, disperse to a thin layer and light-cure for 10 seconds (e.g. Bluephase).