The arrow points to a hole in the palate in this dog caused by improper closure of the gum over the teeth sockets after extraction. This is called an oronasal fistula or ONF.
In most cases this is a procedure only for board certified dentists as it requires extensive dissection to create enough tissue to close the hole without tension of the suture line.”
The gum tissue has been freed from the bone and is ready for suturing
This is immediately postoperative closure of the oronasal fistula in this dog.