Adhesive dentistry is a branch of dentistry which mainly deals with adhesion or bonding of the adhesive material or cements to the natural substance of teeth, enamel and dentin. Tooth bonding techniques have various clinical applications including operative and preventive dentistry as well as esthetic and pediatric dentistry, prosthodontics, and orthodontics. As a modern science, adhesive dentistry studies the nature and strength of the adhesion to dental hard tissues, properties of adhesive materials, causes and mechanisms of failure of the bonds, clinical techniques for bonding and newer applications for bonding such as bonding to the soft tissue.