If technicians are allowed to close skin, isn't the gingiva technically part of the integument system?  It seems to me the gingiva heals a lot faster than a skin incision.  In human medicine they don't even close extractions sites but approximate and allow the alveolus to heal from the inside out.  If a doctor feels the technician is competent enough to close the gingiva, then ultimately it falls back on the doctor anyway.