| Term | Definition |
| arch wire | main wire framework |
| bracket | welded or soldered to a band |
| close bite | overbite |
| corrective orthodontics | braces |
| distocclusion | buck teeth |
| elastics | rubber bands |
| interceptive orthodontics | space maintainers used in growing children |
| ligature wire | fine wire to tie the main arch wire into the brackets |
| macrodontia | unusually large tooth |
| microdontia | unusually small tooth |
| malocclusion | abnormal or malposition |
| open bite | incisors do not pass one another on the vertical axis |
| orthodontics | specialty that deals with the diagnosis and treatment of malocclusions |
| prognathia | developmental malocclusions |
| preventive orthodontics | appliances to maintain space |
| debride | scraping away |
| gingivectomy | surgical removal of gum tissue |
| gingivitis | inflammation of the gums |
| gigivoplasty | surgical repair of the gums |
| necrotizing ulcerative gingivitis | an infection of the gums |
| osteoplasty | surgical repair of the alveolar bone |
| pericoronitis | inflammation around the crown of a partially erupted tooth |
| periodontics | specialty that deals with the diagnosis and treatment of the periodontium |
| periodontium | tissue that surrounds and supports the teeth |
| periodontitis | inflammation of the tissues |
| periodontosis | advanced inflammation and destruction of the gingiva |
| sublingual calculus | calculus deposited below the gingiva |
| sulcus | space between the free gingiva and the tooth |
| supragingival calculus | calculus deposited above the gingiva |