Not typically. NuSmile BioCem will bond to the tooth directly, no etching or priming is required. If the prepared tooth is severely tapered (>15°) or very short (<4mm) it may be advisable to create mechanical undercuts or horizontal grooves in the prepared tooth prior to cementing to provide more surface area and some mechanical retention. If there is very little tooth structure left, using an acid etchant and bonding agent on the tooth prior to cementation may achieve a better bond to the tooth.