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by Kalibeck on 08 February 2008 - 10:02
This is from thr OFA's official explanation of their grades..their pictures & text...all credited to the OFA. Excellent (Figure 1): this classification is assigned for superior conformation in comparison to other animals of the same age and breed. There is a deep seated ball (femoral head) which fits tightly into a well-formed socket (acetabulum) with minimal joint space. There is almost complete coverage of the socket over the ball.
Good
Good (Figure 2): slightly less than superior but a well-formed congruent hip joint is visualized. The ball fits well into the socket and good coverage is present.
Fair
Fair (Figure 3): Assigned where minor irregularities in the hip joint exist. The hip joint is wider than a good hip phenotype. This is due to the ball slightly slipping out of the socket causing a minor degree of joint incongruency. There may also be slight inward deviation of the weight-bearing surface of the socket (dorsal acetabular rim) causing the socket to appear slightly shallow (Figure 4). This can be a normal finding in some breeds however, such as the Chinese Shar Pei, Chow Chow, and Poodle.
Borderline
Borderline: there is no clear cut consensus between the radiologists to place the hip into a given category of normal or dysplastic. There is usually more incongruency present than what occurs in the minor amount found in a fair but there are no arthritic changes present that definitively diagnose the hip joint being dysplastic. There also may be a bony projection present on any of the areas of the hip anatomy illustrated above that can not accurately be assessed as being an abnormal arthritic change or as a normal anatomic variant for that individual dog. To increase the accuracy of a correct diagnosis, it is recommended to repeat the radiographs at a later date (usually 6 months). This allows the radiologist to compare the initial film with the most recent film over a given time period and assess for progressive arthritic changes that would be expected if the dog was truly dysplastic. Most dogs with this grade (over 50%) show no change in hip conformation over time and receive a normal hip rating; usually a fair hip phenotype.
Mild
Mild Canine Hip Dysplasia (Figure 5): there is significant subluxation present where the ball is partially out of the socket causing an incongruent increased joint space. The socket is usually shallow only partially covering the ball. There are usually no arthritic changes present with this classification and if the dog is young (24 to 30 months of age), there is an option to resubmit an radiograph when the dog is older so it can be reevaluated a second time. Most dogs will remain dysplastic showing progression of the disease with early arthritic changes. Since HD is a chronic, progressive disease, the older the dog, the more accurate the diagnosis of HD (or lack of HD).
Moderate
Moderate Canine Hip Dysplasia: there is significant subluxation present where the ball is barely seated into a shallow socket causing joint incongruency. There are secon
by Kalibeck on 08 February 2008 - 10:02
Moderate
Moderate Canine Hip Dysplasia: there is significant subluxation present where the ball is barely seated into a shallow socket causing joint incongruency. There are secondary arthritic bone changes usually along the femoral neck and head (termed remodeling), acetabular rim changes (termed osteophytes or bone spurs) and various degrees of trabecular bone pattern changes called sclerosis. Once arthritis is reported, there is only continued progression of arthritis over time.
Severe
Severe HD (Figure 6): assigned where radiographic evidence of marked dysplasia exists. There is significant subluxation present where the ball is partly or completely out of a shallow socket. Like moderate HD, there are also large amounts of secondary arthritic bone changes along the femoral neck and head, acetabular rim changes and large amounts of abnormal bone pattern changes.
Other Hip Dysplasia Registries—An Approximation
|
OFA |
FCI (European) |
BVA (UK/Australia) |
SV (Germany) |
|---|---|---|---|
|
E |
A-1 |
0-4 (no > 3/hip) |
Normal |
|
G |
A-2 |
5-10 (no > 6/hip) |
Normal |
|
F |
B-1 |
11-18 |
Normal |
|
B |
B-2 |
19-25 |
Fast Normal |
|
M |
C |
26-35 |
Noch Zugelassen |
|
Mod |
D |
36-50 |
 by senta on 08 February 2008 - 12:02 So sorry for you.
I have one question: why x-ray so late with 2 years?
Normally x-ray with 12 month I think.  by Rezkat5 on 08 February 2008 - 12:02
OFA does not give a rating here until 2 years of age. You can only have prelims done before then. The German A Stamp can be done at 12 months of age. by Blitzen on 08 February 2008 - 14:02 IF OFA was right and this dog did have normal hips at 12 months, that seems to be another good indication that xrays at 12 months aren't always diagnostic and a final evaluation should not be issued until the dog is older. SV's 12 month lower limit for an evaluation could be too young to catch all the dysplastic dogs and some could slip throught the cracks and be used for breeding. That might answer some of the questions about why there seems to be so much HD in this breed even when there are generations of clear dogs in the pedigree. IMO another xray would not get this dog an OFA number; I believe she is moderately to severely dysplastic, quite a profound change from having normal hips at 12 months. Some manipulation might improve the fit of the balls in the sockets, but there is a lot of remoldeling at the necks and flattening of the heads which is not the result of a poorly positioned xray; it's the result of a loose fit and wear and tear on the hip joints. To me this xray looks like it is positioned correctly. Having said that, I don't want to discourage Reno from having her done again if she feels that's the right thing to do. Can't hurt. by senta on 08 February 2008 - 15:02 That has nothing to do with the age of the dog. I let x-rayed my female with 4 years in elbows. Result normal like with a younger dog.
I asked because another reason: If you know the dog has bad hips with 12 month you doesnt need to work with him, better to use him for normally family dogs without sport ect.
If this dog has HD with 2 years - he has had HD with 12 month too.
BUT: ever in former times one white, like the hip is - the better one can decide for the future of the dog.
It is normal that a GSD is fully trained in the age of two years. If it bad hips has - full training makes it only worse. Therefore it is to be known better with 12 months the truth. by eichenluft on 08 February 2008 - 15:02 did Cheryl say this dog had normal hips at 12 months? I didn't catch that, and looking at the hips now (major bone remodeling, I doubt it.
molly by Blitzen on 08 February 2008 - 16:02 Senta, the point is that at 12 months you might not always be able to tell which dogs are normal and which dogs aren't. So, for some dogs, 12 months is too young for a final xray. The xray here is a prime example of a dog that was said to have normal hips at 12 months, but now looks dysplastic at 24 months. I assume most breeders want to know the truth, not just get an ZW or an OFA number. Certainly if I had a GSD that was certified by the SV at only 12 months of age, I'd want to take another look at the hips when that dog was at least 24 months old to be sure there were no changes. I'd be especially insistant on that if this dog produced more than the expected number of dysplastic progeny. OFA used to issue numbers at 12 months too until they learned that some of those dog were turning up dysplastic when they were older. They then raised their lower age limit to 24 months for a permanent evaluation. There is no upper age limit as far as I know. by Blitzen on 08 February 2008 - 16:02 I agree, Molly, and it shakes my faith in the OFA even more. by eichenluft on 08 February 2008 - 16:02 again, I don't think Reno said that THIS dog was x-rayed normal at 12 months??????? As far as I can tell, the 2-year x-rays shown here are the first ones. So I don't think there is reason to believe the hips were normal at 12 months and dysplastic now.
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