Questions and Answers

 A Question by a fifth year student

Question

What is the influence of eugenol containing temporary cements on composite bonding?

Answer 

Eugenol-containing provisional material was found to affect

the bond strength to resin restoration/cement, but this effect

was not statistically significant within  seven-days .

However, some studies claimed that  

this effect could be significant when shorter duration, or

different adhesive systems were employed. Therefore, more

studies are needed for stronger evidence on the effect of

eugenol containing temporaries on the bond strength under

controlled variables.

Procedure

1.  Use Eugenol-containing temporary  as

directed by manufacturers.

2. Wait at least for one week prior to replacement of

eugenol-containing temporary materials with resinous final

materials .

3.Remove Eugenol  properly from the tooth structure before bonding.

4.  Perform proper bonding technique for dentin.

Dual bonding procedure is recommended before

temporization.

Dual bonding technique  :

1.     Apply dentin bonding agent on dentin surface and light cure

2.     Add Zinc oxide eugenol  for 1 week

3.     Remove ZOE temporary filling

4.     Apply dentin  bonding agent again together with composite  and light cure.

Bertchinger C ,Paul SJ

Dual application of dentin bonding agent

Am J Dent 1996

 Eduardo Schwartzer FMC, Fabrício Aulo Ogliari, Vicente

Castelo Branco Leitune, Susana Maria Werner Samuel.

Influence of zinc oxide-eugenol temporary cement on bond strength of an all-

in-one adhesive system to bovine dentin.

Brazilian Journal of Oral Sciences 2007