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Glossary of Terms for Hip Dysplasia (DDH)

Abduction – Drawing away from the midline of the body

Acetabulum – Cup shaped socket of the hip bone

Adducted/adducted – To move a limb or any other part towards the midline of the body

Arthrogram – x-ray with dye

Bilateral – Affecting both sides

Breech – Position of the baby in the womb, so that it will be delivered buttocks first

Congenital – Present around the time of birth

DDH – Developmental Dysplasia of the Hip Developmental Arising in infancy or childhood and dependent on growth

Dislocated – The head of the thighbone is positioned outside the socket and cannot be re-centred (displaced)

Dysplasia – Lack of normal growth, in the hip often refers to under development

Femoral Head – Ball shaped top of thigh bone

Femur – Thigh bone

Gait – Style of walking

Idiopathic – A condition of which the cause is not known

Instability – In the hip refers to a joint which has too much movement

Lax – Loose

Ligament – Tough band of connective tissue that links two bones together at a joint

Orthopaedics –  A branch of medicine that deals with bones and joints

Ostearthritis – Disease of wear and tear in a joint, casues pain and lack of mobility in the joint

Osteotomy – Surgical division of the bone.

Prognosis –  A prediction of a future outcome

Reduction – To restore a joint to its correct position, closed reduction is done by manipulation. Open reduction is done by surgery

Subluxated – Partial dislocation of a joint, so that the bones are mis-aligned, but still in contact

Tenotomy – The surgical cutting of a tendon

Tendon – A tough fibrous tissue that connects muscle to the bone

Ultrasound – A technique which uses high frequency sound waves to build up a picture of soft tissue and organs in the body

Unilateral –  Affecting one side

X-Ray –  A techinique which uses very low dose radiation to image parts of the body, especially useful for imaging bones