Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «O»:
Osteoclasia: Destruction and reabsorption of bone
tissue, as occurs when broken bones heal....
Osteoclasis: The surgical
destruction of bone tissue. Osteoclasis is performed to reconstruct a bone that
is malformed, often a broken bone that healed improperly. The bone may be broken
and then reshaped with the aid of
metal pins, casting, and bracing....
Osteoclast: A cell that nibbles at and breaks down bone and is responsible for bone resorption.
Osteoclasts are large multinucleate cells (cells with more than one nucleus) that differentiate from another type of cell called a macrophage.
In normal bone, bone formation and bone resorption are close...
Osteoclastoma: A type of bone tumor characterized by massive destruction of bone near the end (epiphysis) of a long bone. The site most commonly struck by this tumor is the knee -- the far end of the femur and the near end of the tibia. The tumor is often coated by new bony growth. It causes pain an...
Osteocyte: A bone cell....
Osteodystrophy: A bone disorder that adversely
affects bone growth. See also renal osteodystrophy....
Osteodystrophy, renal: A bone growth disorder
caused by chronic kidney failure (renal disease). Also
known as renal osteodystrophy....
Osteogenesis: The production of bone....
Osteogenesis imperfecta: Brittle bone
disease. Osteogenesis imperfecta (OI) is not one but a group of
genetic diseases, all of which affect collagen in connective tissue
in the body and all of which result in fragile bones. The best known
types are types I and II....
Osteogenesis imperfecta congenita
congenita: See: Osteogenesis imperfecta type II. ...
Osteogenesis imperfecta tarda
Osteogenesis imperfecta tarda:
See: Osteogenesis imperfecta type I. ...
Osteogenesis imperfecta type 1
Osteogenesis imperfecta type 1: An
inherited connective tissue disorder
featuring bone fragility and blue sclerae (blue whites of
the eyes). This is the classic form of "brittle bone disease."
Osteogenesis imperfecta type 1 is an autosomal dominant trait. (One copy of the mutant
gene is enoug...
Osteogenesis imperfecta type 2
Osteogenesis imperfecta type 2:
An inherited connective tissue disorder with extremely severe bone fragility. This is the lethal form of "brittle bone disease."
Osteogenesis imperfecta type 2 is a recessive trait with males and females affected. Two copies
of the mutant gene are needed to cause t...
Osteogenesis imperfecta with blue sclerae
Osteogenesis imperfecta with blue
sclerae: See: Osteogenesis imperfecta type I.
Osteogenesis, electrically stimulated
Osteogenesis, electrically stimulated: Bone
growth caused by implanting electrodes in an area of bone
and sending electrical current to them. This procedure may
be used to jump-start the healing process when a bone has