A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

O

Occlusion:
closure; relationship of the upper and lower teeth upon closure

Onlay:
laboratory produced restoration covering one or more cusps of a tooth

Oral and maxillofacial surgeon:
a dental specialist who manages the diagnosis & surgical treatment of diseases, injuries, and deformities of the mouth and supporting structures; Requires four additional years of training after dental school

Oral cavity:
the mouth

Oral hygiene:
process of maintaining cleanliness of the teeth and related structures

Oral and maxillofacial surgery:
surgical procedures on the mouth including extractions, removal of cysts or tumors, and repair of fractured jaws

Oral pathologist:
dentist specializing in the study of oral diseases

Orthodontics:
dental specialty that treats misalignment of teeth

Osseous:
boney

Overbite:

vertical overlap of the front teeth

Overdenture:
denture that fits over residual roots or dental implants

Overjet:
horozontal overlap of the front teeth