<prompt> A diagnostic wax-up is indicated when ___.Re-establishing anterior guidanceA provisional fixed prosthesis is to be fabricatedUncertainty exists regarding estheticsAll of the above  <response>: It is recommended that any time there is a question regarding the treatment outcome involving a prosthetic device, or the need to produce templates for provisional restorations that reproduce a desired form of teeth, a diagnostic wax-up should be generated. 