HD (hip dysplasia)

The HD is largely genetically determined, so many breed associations, the high-demand for freedom for breeding. Since the wrong diet and attitude formation and may promote the progression of the disease, is a multifactorial (dependent on many factors) Done. Clinically, HD is reflected in the increasing movement restriction and pain to the pathological remodeling of the hip occur as a result. In advanced stages, only the hip joint with or without removal of a hip replacement, a significant improvement of the cause.This is not possible, can be a long lasting pain often sufficient to maintain a quality of life.

The expression of clinical symptoms of HD vary depending on the age and stage of disease. In relatively young animals, aged between one half to one year, it comes to pain, because the femoral head in acetabulum inadequate maintenance refers only and its abnormal mobility pain registering nerve fibers of the periosteum of the glenoid rim are irritated. Older animals are pain due to progressive degenerative changes (osteoarthritis) of the hip joint are rare.

A beginning HD manifests itself in increasing pain when walking, the dog will not run far longer, often sits down, screaming and playing occasionally shows an unstable response. When giving the hind limb, the pelvis in the direction of the works shown sideways. With movements of the joint, a pops, clicks or grinding of the joint may be heard.  If you find a vet of the symptoms is the immediate response to the wise.

 

A key evaluation criterion is the Norberg angle.  It is defined as the angle, the line connecting the centers of both femoral heads and the front edge of the socket is removed from the.

With an HD-free animals should be more than 105 °.

The breeding evaluation of HD recording is only through the race breed associations approved appraisers possible to the veterinarian, a contribution of the X-ray images.

Germany is usually between five different degrees of severity distinction.

HD-severity
A	HD-Free	In every respect inconspicuous joints, Norberg angle 105 ° or more. Sometimes even when the A1 pan edge even further embraces the femur.
B	HD suspect	Femoral head or acetabulum are slightly uneven and the Norberg angle is 105 ° (or more), or Norberg angle is less than 105 ° but uniform femoral head and acetabulum.
C	Light HD	Femoral head and acetabulum are uneven, Norberg-angle 100 ° or smaller.  Any slight osteoarthritic changes.
D	Mean HD	Femoral head and acetabulum are markedly uneven part with contortions. Norberg angle greater than 90 °. This leads to arthritic changes and / or changes to the glenoid rim.
E	Heavy HD	Noticeable changes in the hip joints (for example, part contortions), Norberg angle of 90 °, the acetabular rim is flattened considerably.There will be various arthritic changes.

 

Sometimes, the AD levels yet A1 and A2, B1 and B2, C1 and C2 and D1 and D2 divided into.

This classification does not determine the severity of the symptoms experienced by the individual dog.

HD-names in the Netherlands

Netherlands	Germany	Description
HD-	HD A	HD-Free
HD Tc	HD B	HD suspect
HD ±	HD C	Light HD
HD +	HD D	Mean HD
HD + +	HD E	Heavy HD

 

Good conformation and uniform moderate movement affected dog can hold a long symptom-free.

At birth, the hip joint is largely made of cartilage and bone in time and if converted to.  From the 7th Week of life is the onset of ossification of the pelvic socket identified. This shows how sensitive puppies in this area have and how important an appropriate diet and an outlet are just puppies.

Between 4 and 7 Months to close the growth plates of the pelvic socket and between 7  and 11  Month, the growth in length of the femur been det.

The basis of HD, therefore, developed within the first 6 months in which the connective tissue of this area is still growing in

The inheritance of a weakness in the hip area is the dominant mode of inheritance with several genes in inherited.  This is called genetic disposition.  This means, however, that a formation of HD, other factors are necessary.

To grow rapidly through much of nutritious food, often coupled with an increased weight load is not evenly formed joints. Too much movement, jumping, climbing stairs, etc. to overload these areas as well. Irregularities in the joint are particularly burdened.

 

The body tries these areas through increased calcium deposition and thickening in balance.This leads to a deterioration of the joint shape and in addition to inflammation and recognizable lameness

Prepared by the Rhodesian Ridgeback breeders:
Mashambani

& Mhangura