Glossary

OC

Osteochondral

Occlusal loading

Dental The restoration is in occlusal contact with the opposing dentition in maximal intercuspal position and/or excursions

OCT

Occipito-cervico-thoracic

ODM

Original Development & Design Manufacturing

OEM

Original Equipment Manufacturer

OFP

operation free period

one-piece

One-piece dental implants do not only consist of the artificial root, but are also firmly connected to the abutment that supports the dental crown. Advantages: – No micro-cleft with hygienic problems – Smaller implants possible, smaller wound, faster surgery – Simplified definitive care, cheaper Disadvantages – Insertion divergences (can be corrected in some systems by …

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One-piece abutment

Dental An abutment that connects into the implant without the use of an additional screw. The abutment can be retained by cements, friction (press-fit), or screw threads.

One-piece implant

Dental The implant in which the endosseous and transmucosal portions consist of one unit which presents a surface without a joint to the tissues.

oral

“Oral” relates to the mouth.

Organoids

Organoids are multicellular structures that can be derived from adult organs or pluripotent stem cells. Early versions of organoids range from simple epithelial structures to complex, disorganized tissues with large cellular diversity.  

Orthodontic implant

Dental Any implant used during orthodontic treatment as anchorage for orthodontic tooth movement.

Osseointegration

The term refers to the direct structural and functional connection between living bone and the surface of a load-bearing (Albrektsson et al. in 1981) artificial implant. A more recent definition (by Schroeder et al.) defines osseointegration as “functional ankylosis (bone adherence)”, where new bone is laid down directly on the implant surface and the implant …

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Osteoblast

A fully differentiated cell that originates in the embryonic mesenchyme and, during the early development of the skeleton, functions in the formation of bone tissue. Osteoblasts synthesize the collagen and glycoproteins that form the bone matrix, and also produce inorganic salts. With growth, they develop into osteocytes.

Osteoclast

Large multinucleated cell, arising from mononuclear precursor of the hematopoietic lineage, that functions in the breakdown and resorption of osseous tissue.

Osteocyte

An osteoblast that has become embedded within the bone matrix, occupying a flat oval cavity (bone lacuna). Cells found in bone lacunae send, through canaliculi, slender cytoplasmic processes that make contact with processes of other osteocytes.

Osteoinduction

Osteoinduction involves the stimulation of osteoprogenitor cells to differentiate into osteoblasts that then begin new bone formation. The most widely studied type of osteoinductive cell mediators are bone morphogenetic proteins (BMPs).  

Osteoinductive

De novo production of bone out of pluripotent reserve cells (stem cells), they are present in perivascular tissue and bone and they may activated through morphogene factors. Osteoinductive substances must lead to an ektope bone building at an extraskeletal place.

Osteolysis

Osteolysis is an active resorption of bone matrix by osteoclasts. Although osteoclasts are active during the natural formation of healthy bone the term “osteolysis” specifically refers to a pathological process. Osteolysis may occur around implants by inflammation, immunological response, tumors, cysts or changes in the bone’s structural load.

Osteotomy

Any surgical procedure in which bone is transected or cut.

Overdenture

Dental Removable partial or complete denture, which may be implant-supported or implant-tissue-supported. The prosthesis is retained by attachments.

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