Setting defaults in Word API

Question

I am loading a word document using the following code, however, if a previous document has changed any of the default styles, I am inheriting those changed styles in my document. Is there any way to reset the styles to default? I should note that I am trying to stay with V1.1 of the word API

  var body = context.document.body;
  body.clear();
  body.insertFileFromBase64(templateContent, Word.InsertLocation.start);