Neonatal teeth the normal allotment of teeth. Most often natal teeth are mandibular central incisors. They have little root structure and are attached to the end of the gum by soft tissue and are often mobile. Most of the time, natal teeth are not related to a medical condition. However, sometimes they may be associated with: No intervention is usually recommended unless they are causing difficulty to the infant or mother. However some recommend that they be removed as the tooth can cut or amputate the tip of the tongue. They should be left in the mouth as long as possible to
Hinge teeth arrangement of structures known as hinge teeth (often referred to collectively as the "dentition"). Like the ligament, the hinge teeth are also situated along the hinge line of the shell. In most families of bivalves, the two valves of the shell are almost perfectly symmetrical with one another along the hinge line, although the placement and shape of the teeth may differ slightly in the left valve and right valve in order for the two valves to articulate properly. Each related group of bivalves tends to have distinctive hinge teeth, and because of this, examining the arrangement of the hinge