Perth Glossary Of Dental Terms O


This is a glossary of terms for your information.

Aria Dental recommends that you understand dental terms and words that may be used in the course of dialogue with our Dentists and Dental Staff.

Please do not hesitate to seek further clarification, if necessary.

All our staff will be happy to assist in your understanding.


  • Occlusion: The relationship of the upper and lower teeth upon closure.
  • Onlay: A laboratory-produced restoration covering one or more cusps of a tooth.
  • Oral and Maxillofacial Surgeon: A dental specialist who manages the diagnosis and surgical treatment of diseases, injuries and deformities of the mouth and supporting structures.
  • Oral and Maxillofacial Surgery: Surgical procedures on the mouth including extractions, removal of cysts or tumours, and repair of fractured jaws.
  • Oral Cavity: The mouth.
  • Oral Hygiene: The process of maintaining cleanliness of the teeth and related structures.
  • Oral Pathologist: A dentist specialising in the study of oral diseases.
  • Orthodontics: Orthodontics is somewhat similar to prosthodontics, since both use artificial means of replacing, repairing, or correcting the smile and jaw. However, where prosthodontics focuses on bridges, dentures, and implants, orthodontics involves dental braces and other appliances. Whether traditional metal braces or innovative invisible braces are used, the effect is normally a straight smile in a relatively short time.
  • Osseous: Relating to bone.
  • Osseointegration: Derives from the Greek osteon, bone, and the Latin integrare, to make whole. The term refers to the direct structural and functional connection between living bone and the surface of a load-bearing artificial implant. Osseointegration has enhanced the science of medical bone and joint replacement techniques as well as dental implants.
    Osseointegration is also defined as: “the formation of a direct interface between an implant and bone, without intervening soft tissue”. An osseointegrated implant is a type of implant defined as “an endosteal implant containing pores into which osteoblasts and supporting connective tissue can migrate”. Applied to oral implantology, this refers to bone grown right up to the implant surface without interposed soft tissue layer. No scar tissue, cartilage or ligament fibres are present between the bone and implant surface. The direct contact of bone and implant surface can be verified microscopically.
  • Overbite: A vertical overlap of the front teeth.
  • Overdenture: A denture that fits over residual roots or dental implants.
  • Overjet: A horizontal overlap of the front teeth.