Developmental Dysplasia of the Hip (DDH)

Developmental Dysplasia of the Hip or DDH is generally the preferred term for babies and children with hip dysplasia since this condition can develop after birth. DDH is a medical term for general instability, or looseness, of the hip joint. Doctors use a number of different terms for hip dysplasia depending on severity and time of occurrence. These names include:

  • Hip Dysplasia
  • Developmental Dislocation of the Hip (DDH)
  • Hip Dislocation
  • Developmental Dysplasia of the Hip (DDH)
  • Acetabular Dysplasia
  • Congenital Dislocation of the Hip (CDH)

The term Congenital Dislocation of the Hip (CDH) tends to refer to a defect where something is missing or added to normal tissues. In the case of DDH, the infant/child’s joint is otherwise normal except for the instability.

 

Hip Joint Anatomy

Hip Joint anatomy

The hip is a “ball-and-socket” joint that is held together by ligaments.

The ball is called the “femoral [fem-er-uhl] head” which is the top of the femur or thigh bone.

The socket is called the “acetabulum” [as-i-tab-yuh-luhm] and is a part of the pelvis.

The femoral head fits into the acetabulum creating the hip joint. This joint is normally held tightly in place by the surrounding ligaments and joint capsule.

 

Severity of Developmental Dysplasia of the Hip (DDH)

human hip joint as it should appearSubluxation when the ball is not aligned properly with the socket. A mild form of hip dysplasiaLow Dislocation when the ball is just outside of the socket. A more serious form of hip dysplasia. High dislocation - the ball is completely removed from the hip socket. A severe form of hip dysplasia.

Types of hip dysplasia

Hip dysplasia has a wide range of severity. In some children the ligaments around the hip joint are loose allowing the hip to subluxate. This is when the ball is no longer centered in the socket. Other times the ball is slightly or completely dislocated from the socket.


Learn about Causes of Hip Dysplasia »

  • Social Media Links

  • Translate Link

    Para ver en Español Click Aquí

  • SubNav Menu

  • Hippo CTA

  • Child CTA

  • Wrist Bands Block

    Hip Dysplasia Brochures
  • Adult CTA

  • Latest News

    Latest News

    view all

    Middle East Pediatric Orthopedic Surgery Conferenc...

    Oct 20

    Thanks to your donations, the International Hip Dysplasia Institute (I...

    New Guidelines for Infant Hip Dysplasia

    Sep 25

    American Academy of Orthopedic Surgeons releases new practice guidelin...

    Surgery

    Sep 19

    Preparing for surgery as an adult As far as most people are concerned...

  • Latest Stories

    Latest Stories

    view all

    Sam Bowen

    May 20

    Here is the story of one mums fight against the social stigmatism asso...

    Gina Jay

    Apr 01

    Gina Jay is an author, advocate, mother, wife, and creator of the fu...

    Allison

    Oct 21

    Casting all your cares upon Him because He cares for you. I Peter 5:7 ...