An object, usually a metal bar, placed into the mouth of a horse, held on by a bridle and used with reins to direct and guide the animal. Occasionally made of other materials, including rubber.May be solid or jointed and may have rollers or other attachments added, usually in the center.
There are 32 teeth in the human mouth, including the wisdom teeth at the back that most people have removed. But how many of them do we seriously need? This question has exercised dentists since the dawn of the NHS with its cash-limited budget for treatment.
The ânormalâ adult human has 32 teeth. An adult should have 32 teeth with 8 incisors, 4 canines, 8 premolars, and 12 molars which include the four wisdom teeth. Humans develope 2 sets of teeth in their lives. the first set known as baby teeth began to come though at about age 6 months. They eventually have about 20 teeth as children before they began to lose them. The second, permanent set of teeth consists of 32 teeth. Twenty-eight of them appear between the ages of about 6 and 12 years. Secondary teeth do not push deciduous teeth out of their sockets; instead, a group of cells (odontoclasts) forms in front of tip of second tooth and dissolves the base of first tooth.