
Dentistry is defined as the evaluation, diagnosis, prevention, and/or treatment of diseases, disorders, and/or conditions of the oral cavity, maxillofacial area, and/or the adjacent and associated structures using surgical, nonsurgical, or related procedures. Concern for oral care is increasing due to rising prevalence of tooth decay, periodontal diseases, tooth erosion, and tooth sensitivity Dentists use various tools for different procedures such as removing cavity and cleaning teeth. These tools are made of metals such as stainless steel and tungsten carbide. Dental drills are available in various designs. Dental drill is basically composed of an air turbine, a hand-piece and tungsten carbide drill bit. Hand piece is a tube shaped slender connecting drill bit with the driving motor. Drill bit is the essential part of dental drill. Dental drills are constructed from a variety of raw materials such as metals and polymers. The most advance hand piece is made with titanium. Electric operated dental drill generate large amount of heat. It performs cutting action smoothly. Dental drill is frequently used by dentists and dental practitioners for treating cavities in diseases such as dental caries and abscesses, as to restore teeth. It bores through tooth enamel and removes or clean plaque from the surface of the tooth. After drilling the tooth completely, accurately and properly, it is prepared for filling with suitable material and crown to strengthen teeth. It also helps in reducing further damage. New innovations and technological advancement are replacing dental drill with lasers. Nowadays, a new method known as air-abrasive technology is used by dentists of treating cavities. In this new method dentist blasts away parts of the tooth surface without using a drill.