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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
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