Category: O
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Ostium of the maxillary sinus
Communication between the maxillary sinus and the nasal cavity located at the middle meatus.
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Osteotomy
The intended or desired cutting of a bone; often used to describe the tasks of smoothing, leveling, realigning, or altering external contours of the bone. A surgical operation to cut a bone, especially to relieve pain in a joint. A surgical procedure in which a bone is cut to shorten, lengthen, or change its alignment.…
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Osteotome technique (syn)
Internal sinus graft. A sinus grafting technique whereby the maxillary sinus floor is carefully infractured and the Schneiderian membrane is elevated through an osteotomy prepared and extended in the ridge with an osteotome. The surgical expansion of an osteotomy laterally with or without grafting.
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Osteotome
A beveled chisel for use in cutting or preparing bone. A type of chisel used by surgeons to cut bone. A surgical tool used to cut bone.
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Osteoradionecrosis (ORN)
Necrosis of jaw bone as a late effect of ionizing radiation, which is used in treatment of malignancies of head and neck. It causes vascular changes with reduction in blood flow resulting in hypovascularity, hypocellularity, and hypoxia. Spontaneous necrosis of jaw bone may appear with subsequent ischemic necrosis of the covering mucous membrane and exposure…
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Osteoprotegerin (OPG)
Produced by osteoblasts, OPG acts as a decoy receptor for RANKL and inhibits osteoclastogenesis and osteoclast activation by binding to RANKL.
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Osteopromotive
The quality of a biologic adjunct, growth factor, or graft material which, when added to an osteoinductive graft, tends to increase its level of osteoinductivity.
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Osteopromotion
Sealing off of a bone defect from the surrounding soft connective tissue by placement of a mechanical barrier (membrane), thereby creating a secluded space into which only cells from the walls of the bone defect can migrate. Expanded polytetrafluoroethylene (e‐PTFE) is the best documented membrane material for promoting bone healing and regeneration by encouraging the…
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Osteoprogenitor cell
Relatively undifferentiated cell found on nearly all of the free surfaces of bone. Under certain circumstances, these cells undergo division and transform into osteoblasts or coalesce, giving rise to osteoclasts.
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Osteoporosis
Skeleton pathology distinguished by decreased normal bone mass and mineralized bone density; it is seen most commonly in the elderly. A disease of bone that leads to an increased risk of fracture. A disease in which bones become more fragile and are at increased risk of breaking. A disease of bone that leads to an…