Etching a hybrid glass ionomer-composite
a. is necessary for composite resin bonding  
b. is not necessary for composite resin bonding  
c. is necessary for adding a glass ionomer cement for repair  
d. is not necessary for adding a glass ionomer cement for repair  
e. a 3-5 second etch with 10% phosphoric acid is recommended

1 Answer

Answer :

b. is not necessary for composite resin bonding

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