1. If the instrument does not transmit light, will the composite material covered by OptraContact®
    polymerize sufficiently?
    Yes, the composite material will be thoroughly polymerized if the manufacturer's instructions regarding the
    polymerization time for the composite are followed. (top of page)

2. Does the use of OptraContact® affect the marginal quality of the restoration?
    OptraContact® has no effect on the marginal quality of restorations. (top of page)

3. How do you best fill the indentations created by the bi-furcated end of the instrument?
    The indentations are best filled by carefully applying small portions of composite to the indentations using a
    fine condensing instrument. Alternatively, a flowable composite (e.g. Tetric EvoFlow®) may be utilized. (top of page)

4. Do surfaces that are in contact with OptraContact® during polymerization provide reliable bonding?
    Yes, without any difficulty. Freshly polymerized composite contains enough free reactive groups to ensure
    a reliable bond. (top of page)

5. How much pressure do I need to apply to OptraContact®?
    Apply light pressure only. Slightly increase the pressure in large cavities to move the matrix towards
    the neighboring tooth. (top of page)

6. What matrix systems can be used in conjunction with OptraContact®?
    OptraContact® is best used with OptraMatrix® to benefit fully from the advantages of this instrument
    combined with the thinned (10um) matrix band. In addition, OptraContact® is suitable for all popular circular
    and sectional matrices. (top of page)

7. How do I use OptraContact® appropriately when restoring deep cavities?
    When deep cavities are restored, OptraContact® should be utilized with the second composite increment to
    avoid creating contact points that are in an inappropriately low position. However, it is advisable to push the
    matrix towards the neighboring tooth when the first increment is placed (without pressing OptraContact®
    into the composite layer) to achieve a homogeneous proximal surface. (top of page)

8. How do I use OptraContact® when restoring adjacent class II defects?
    The restorations should be placed consecutively. OptraContact® is used on the second restoration. (top of page)

9. Can OptraContact® be employed as a lever to achieve better separation?
    OptraContact® should not be subjected to a high amount of pressure. The surface of OptraContact®
    should be in contact with the matrix. If large cavities and thin enamel walls are present, the enamel walls may
    break if excessive pressure is applied to the matrix. (top of page)

10. Can OptraContact® be used to shape flowable composites?
      It is not advisable to use OptraContract® to shape flowable composites, as these materials should only
      be applied in thin layer thicknesses. (top of page)