Is It Possible for Gum Tissue to Grow Together if Stitches Came out Too Soon ?

I had 4 lower dental implants with bone grafting, and my stitches came out within a couple of days. Now there is an open 'trench' between my gums where the implants are, and my gums are not connected to each other. Will they eventually grow together on their own? My surgeon will not stitch them back together, and just has me on antibiotics. I am worried that they are not going to heal. Thank you in advance for your time.