DevelopmentalDysplasiaHip

DevelopmentalDysplasiaHip - Developmental Dysplasia of the...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Developmental Dysplasia of the Hip Heather Roche April 4 , 2002
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Previously known as congenital dislocation of the hip implying a condition that existed at birth developmental encompasses embryonic, fetal and infantile periods includes congenital dislocation and developmental hip problems including subluxation, dislocation and dysplasia
Background image of page 2
Normal Growth and Development Embryologically the acetabulum, femoral head develop from the same primitive mesenchymal cells cleft develops in precartilaginous cells at 7th week and this defines both structures 11wk hip joint fully formed acetabular growth continues throughout intrauterine life with development of labrum birth femoral head deeply seated in acetabulum by surface tension of synovial
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The cartilage complex is 3D with triradiate medially and cup-shaped laterally interposed between ilium above and ischium below and pubis anteriorly acetabular cartilage forms outer 2/3 cavity and the non-articular medial wall form by triradiate cartilage which is the common physis of these three bones fibrocartilaginous labrum forms at margin of acetabular cartilage and joint capsule inserts just above its rim
Background image of page 4
articular cartilage covers portion articulating with femoral head opposite side is a growth plate with degenerating cells facing towards the pelvic bone it opposes triradiate cartilage is triphalanged with each side of each limb having a growth plate which allows interstitial growth within the cartilage causing expansion of hip joint diameter during growth In the infant the greater trochanter, proximal femur and intertrochanteric portion is cartilage 4-7 months proximal ossification center appears which enlarges along cartilaginous anlage until adult life when only thin layer of articular cartilage persists
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Development cpn’t Experimental studies in humans with unreduced hips suggest the main stimulus for concave shape of the acetabulum is presence of spherical head for normal depth of acetabulum to increase several factors play a role spherical femoral head normal appositional growth within cartilage periosteal new bone formation in adjacent pelvic bones development of three secondary ossification centers normal growth and development occur through balanced growth of proximal femur, acetabulum and triradiate cartilages and the adjacent bones
Background image of page 8
DDH Tight fit between head and acetabulum is absent and head can glide in and out of acetabulum hypertrophied ridge of acetabular cartilage in superior, posterior and inferior aspects of acetabulum called “ neolimbus” often a trough or grove in this cartilage due to pressure from femoral head or neck 98% DDH that occur around or at birth have these changes and are reversible in the newborn 2% newborns with teratologic or antenatal dislocations and no syndrome have these changes
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
Development in treated DDH different from normal hip goal is to reduce the femoral head asap to provide the stimulus
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

Page1 / 60

DevelopmentalDysplasiaHip - Developmental Dysplasia of the...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online