The medical specialty of dentistry deals with all issues involving the teeth, gums, jaw and mouth. Examples of dentistry sub-specialties include pediatric dentistry, which addresses dental problems in children, orthodontics, which deals with crooked and misaligned teeth, and periodontology, which treats problems with gums and surrounding tissue. Popular dentistry procedures include bone graft, crowns, veneers, dental implants, and root canal. Dentistry also covers aesthetic treatments that focus mainly on the altering of appearance of the teeth and mouth, such as tooth jewelry, tooth whitening, and smile makeovers.