During healing process of tooth extraction socket, bony flakes or sequestra can result from sockets of extracted teeth and patient can feel roughness with the tongue in the socket area. Bone expands to the point that causes disruption in blood supply to the bone and causes death of bone shards and they come out as splinters. These small bone fragments are more common in case of difficult or surgical tooth extraction. They are quite common and can cause some discomfort and pain to the patient. You will be able to remove these small splinters on your own. They will be fine in some time. If you keep rubbing them with tongue, then it can interfere with healing. You can continue with warm saline rinses 3-4 times a day for faster healing of extraction socket to take place. Keep extraction socket area clean to avoid any secondary infections and follow the instructions of your dentist to avoid any complications. For more info on complications after teeth extraction, visit…….   http://www.identalhub.com/dental-complications-after-tooth-extraction-881.aspx