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Dental Surgery Terms Beginning With 'O'

Occlusal X-rays
An X-ray showing full tooth development and placement. On each X-ray the dentist can see the entire arch of teeth in the upper or the lower jaw.

Occlusion
The relationship of the upper and lower teeth when the mouth is closed together.

Onlay
A restoration made of metal, porcelain or acrylic that covers one or more biting surfaces of teeth.

Open bite
The situation where the upper teeth are not able to contact the opposing lower teeth.

Oral and maxillofacial radiologist
A specialist in the production and interpretation of X-ray images and data used in the diagnosis and management of diseases, disorders and conditions of the oral and maxillofacial area.

Oral and maxillofacial surgery
Surgical procedures on the oral cavity including extractions, removal of cysts or tumours and repair of fractured jaws.

Oral cavity
The mouth.

Oral hygiene
Process of keeping cleanliness of the teeth and related structures.

Oral pathologist
The oral health care provider who studies the causes of diseases which alter or affect the oral structures as well as parts of the face and neck.

Oral surgeon
Also known as maxillofacial surgeon, oral surgeon is a dental specialist who has graduated from dental school and completed at least four years of surgical hospital residency. Oral surgeons are trained to diagnose and treat defects, injuries and diseases of the mouth, jaw, teeth, gums, neck and soft tissues of the head.

Orthodontics
A special field in dentistry which involves the prevention, diagnosis and treatment of bite abnormalities or facial irregularities.

Orthodontist
A dental specialist who has graduated from dental school and completed an additional two to three years training program to prevent, diagnose and treat misalignment of teeth, malocclusions and facial development with braces, retainers, headgear and other methods.

Over denture
A denture that fits over the residual roots or the dental implants.

Overbite
The overlap of upper and lower teeth when they close together.