In what situation would you cover the scar of a temporary tracheostomy post-operatively for oral cavity cancer?

There have been some retrospective studies in the literature describing recurrences in the the site of a temporary trachoestomy for head and neck malignancies, although the overall rate appears to be very low. The largest one I could find was this: https://www.sciencedirect.com/science/article/pii/S0385814614000315?_rdoc=1&_fmt=high&_origin=gateway&_docanchor=&md5=b8429449ccfc9c30159a5f9aeaa92ffb