Spinal fusion is surgery to permanently connect
two or more vertebrae in your spine, eliminating motion between them. Spinal
fusion involves placing extra bone (bone graft) to fill the space between two
spinal vertebrae. The bone graft material used in spinal fusion may be in a
preformed shape, or it may be contained within a plastic, carbon fiber or metal
cage. Currently scoliosis is defined as a lateral deviation of the normal
vertical spine. But in fact, the curve is three-dimensional resulting in a
complex deformity.
Congenital scoliosis - a structural anomaly in
the vertebrae.
Neuromuscular - in which there is an imbalance of
the function of the muscles leading on to structural deformity of spine.
Spinal deformities
could result from a variety of causes and in a majority of adolescents, the
exact cause is unknown (idiopathic). Other causes for a spinal deformity are
vertebral anomalies that occur by birth or as a manifestation of some other
disease (eg neurofibromatosis, polio, cerebral palsy and Marfans syndrome). In
adults, spinal deformity can be due to degenerative conditions, previous spinal
surgery or even childhood deformities that have persisted. Doctors classify
scoliosis as congenital, neuromuscular and Idiopathic.
Congenital scoliosis- It results from embryological malformation of one or more
vertebrae and may occur in any location of the spine. Because the abnormality
is present from birth, it is detected at an early age.
Neuromuscular scoliosis-
this is secondary to neurological or muscular diseases and includes
scoliosis associated with cerebral palsy, spinal cord trauma, muscular
dystrophy, spinal muscular atrophy, and spina bifida. This type of scoliosis
generally progresses more rapidly often requires surgical treatment.
Idiopathic scoliosis- Scoliosis is considered idiopathic when
the exact cause is not known. It comprises about 80% of all cases and is
diagnosed during puberty.
Surgicaltreatment of scoliosis is employed if the cure at detection is of greater
magnitude (> 40). The aim of surgical correction is to achieve a
well-balanced spine in which the patient's head, shoulders and trunk are
centered over the pelvis. This is done by using instrumentation to reduce the
magnitude of the deformity and obtaining fusion in order to prevent future
curve progression. The spine has normal curves if seen from the sides and is
seen as a straight column from the front. But in certain conditions the spine
shows curvatures from the front and it is called scoliosis. The abnormal
forward bending of the spine is called kyphosis.
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