scholarly journals Comparison of Cup Setting Angle Accuracy between Computed Tomography-Based and Computed Tomography-Free Navigation in the Same Patients with Crowe's Classification I or II Hip Dysplasia

2021 ◽  
Vol 13 ◽  
Author(s):  
Nobuhiro Kaku ◽  
Hiroaki Tagomori ◽  
Hiroshi Tsumura
Keyword(s):  
Computed Tomography ◽  
Hip Dysplasia ◽  
Setting Angle

Morphometric assessment of hip dysplasia in a cat treated by juvenile pubic symphysiodesis

2016 ◽  
Vol 29 (05) ◽  
pp. 433-438
Author(s):  
John Culvenor ◽  
Craig Bailey ◽  
Alen Lai
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Hip Dysplasia ◽  
Simple Procedure ◽  
Promising Treatment ◽  
Design Case ◽  
Sector Angle ◽  
Morphometric Assessment ◽  
Acetabular Rim

SummaryObjective: To quantitatively evaluate the change of the coxofemoral joints using computed tomography and distraction index in a cat with hip dysplasia treated by juvenile pubic symphysiodesis.Study Design: Case report.Animal: Eighteen-week-old female entire Maine Coon cat.Results: Juvenile pubic symphysiodesis resulted in changes in the distraction index, acetabular angle, dorsal acetabular rim angle, dorsal acetabular sector angle, and clinical improvement at the six month follow-up. No intra-operative or postoperative complications were recorded.Conclusions: Juvenile pubic symphysiodesis performed at 18 weeks of age resulted in improvement in hip joint conformation and hip laxity in a dysplastic cat.Clinical relevance: Juvenile pubic symphysiodesis may be a promising treatment for feline hip dysplasia and is a safe and technically simple procedure to perform. Further investigations are warranted.

Virtual Bernese osteotomy using three-dimensional computed tomography in hip dysplasia

2011 ◽  
Vol 132 (4) ◽  
pp. 447-454 ◽  
Author(s):  
Dong Hun Suh ◽  
Dae Hee Lee ◽  
Woong Kyo Jeong ◽  
Sang Won Park ◽  
Chang Ho Kang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Hip Dysplasia ◽  
Three Dimensional

scholarly journals Computed tomography reveals hip dysplasia in Smilodon: Implications for social behavior in an extinct Pleistocene predator

2020 ◽  
Author(s):  
Mairin A. Balisi ◽  
Abhinav K. Sharma ◽  
Carrie M. Howard ◽  
Christopher A. Shaw ◽  
Robert Klapper ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Los Angeles ◽  
Hip Dysplasia ◽  
Social Strategies ◽  
Mammal Species ◽  
Historical Interpretation ◽  
Congenital Condition ◽  
Patterns Of Behavior ◽  
The Individual ◽  
The Right

AbstractReconstructing the behavior of extinct species is challenging, particularly for those with no living analogues. However, damage preserved as paleopathologies on bone can record how an animal moved in life, potentially reflecting patterns of behavior. Here, for the first time, we use computed tomography (CT) to assess hypothesized etiologies of pathology in a pelvis and associated right femur of an adult Smilodon fatalis saber-toothed cat, one of the best-studied mammal species from the Pleistocene-age Rancho La Brea asphalt seeps, Los Angeles, California. The pelvis exhibits massive destruction of the right acetabulum that previously was interpreted, for nearly a century, to have resulted from trauma and infection. We evaluated this historical interpretation using CT imaging to supplement gross morphology in identifying symptoms of traumatic, infective, or degenerative arthritis. We found that the pathologic distortions are inconsistent with degenerative changes that started only later in life, as in the case of infective or traumatic arthritis. Rather, they characterize chronic remodeling that began at birth and led to degeneration of the joint over time. These findings suggest that this individual suffered from hip dysplasia, a congenital condition common in domestic dogs and cats.The individual examined in this study reached adulthood (at least four to seven years of age) but never could have hunted properly nor defended territory on its own. As such, this individual, and other critically pathologic Smilodon like it, likely survived to adulthood by association with a social group that assisted it with feeding and protection. The pathologic specimens examined here in detail are consistent with a spectrum of social strategies in Smilodon supported by a predominance of previous studies. This application of a relatively new and interdisciplinary technique to an old question therefore informs the longstanding debate between social and solitary hypotheses for the behavior of an extinct predator.

Preliminary report: rapid prototyping models for Dysplastic hip surgery

Open Medicine ◽  
2011 ◽  
Vol 6 (3) ◽  
pp. 266-270 ◽  
Author(s):  
R. Dhakshyani ◽  
Y. Nukman ◽  
N. Abu Osman ◽  
C. Vijay
Keyword(s):  
Computed Tomography ◽  
Rapid Prototyping ◽  
Preliminary Report ◽  
Hip Dysplasia ◽  
Physical Models ◽  
Orthopaedic Surgeon ◽  
Medical Field ◽  
Fused Deposition ◽  
Dysplastic Hip ◽  
Deposition Models

AbstractRapid prototyping (RP) is a technology used to produce physical models. The RP application is applied in the medical field to build anatomy models from high resolution multiplanar data such as Computed tomography (CT). CT of a female patient diagnosed with hip dysplasia was obtained prior to surgery. Specific software was used to prepare the physical model of the patient and was produced using fused deposition machine. Pre fused deposition models (FDM) were given to the orthopaedic surgeon to plan for the dysplastic hip dysplasia. The patient was scanned again using CT after surgery and a post model was produced. The outcome of the surgery was seen clearly by viewing the post model. Orthopaedic surgeon commented on his experience of using the models for the hip dysplasia surgery. These models were found to be very useful for pre surgery planning, determining procedure, implant sizes, positioning, bone grafting which also reduced surgery time by forty percent and increased surgeon confidence as rehearsal prior to actual surgery was made possible. This paper provides an understanding of the benefits of using RP models in hip dysplasia surgery as a good way to enhance both orthopaedic surgeon skill and knowledge.

EFFECTS OF PELVIC AND FEMORAL POSITIONING ON CANINE NORBERG ANGLE MEASUREMENTS AND TEST–RETEST RELIABILITY: A COMPUTED TOMOGRAPHY-BASED SIMULATION STUDY

2014 ◽  
Vol 26 (06) ◽  
pp. 1450076 ◽  
Author(s):  
Ching-Ho Wu ◽  
Cheng-Chung Lin ◽  
Hsuan-Lun Lu ◽  
Tung-Wu Lu ◽  
Lih-Seng Yeh
Keyword(s):  
Computed Tomography ◽  
Hip Dysplasia ◽  
Pelvic Tilt ◽  
Common Disease ◽  
Full Extension ◽  
Joint Measurement ◽  
Projection Model ◽  
Retest Reliability ◽  
Test Retest Reliability ◽  
Norberg Angle

Canine hip dysplasia is a common disease in dogs, often diagnosed by using the Norberg angle (NA), an index for the laxity of the hip joint. Measurement of the NA can be affected by the pelvic and femoral positioning during imaging, the effects and test–retest reliability of which have not been documented. To bridge the gap in knowledge, computed tomography data from 11 Labrador Retriever dogs were obtained and used to generate synthetic ventrodorsal radiographs of the hip for NA measurements via a perspective projection model. Twenty-five synthetic radiographs of the hips were generated at positions defined by combinations of five pelvic tilt angles (-20° to 20° at 10° intervals) and five femoral elevation angles (from full extension to 40° at 10° intervals). For each radiograph, the NA was measured three times by each of the two experienced veterinarian examiners. It was found that both the increase in caudal pelvic tilt and femoral elevation increased the measured NA, although the intra- and inter-examiner reliability was very good for a given hip position. The current results suggest that careful positioning of the pelvis and femur during radiographic imaging is critical for accurately measuring the NA, and thus the laxity of the hip, for the clinical diagnosis of hip dysplasia.

scholarly journals Methods of diagnosis of hip dysplasia in dogs

2021 ◽  
Vol 37 ◽  
pp. 00043
Author(s):  
Elena Lyubchenko ◽  
Irina Bondarenko ◽  
Tatyana Timofeeva
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Hip Joint ◽  
Hip Dysplasia ◽  
Disease Process ◽  
Test System ◽  
Knee Joints ◽  
X Rays ◽  
Resonance Imaging ◽  
X Ray

To diagnose hip dysplasia, you can use a test system, the essence of which is to create a subhabitation in the hip joint of the dog, laid on the side, while there is a click in the joint, which means that the test is positive, while the pressure on the knee joint of the hip joint does not happen. The most common method of diagnosing dysplasia worldwide is X-ray, in which the age of the dogs studied should be more than a year, and large and giant breeds are studied in the range of one to one and a half years, with the animal laid on the back so that the X-ray image shows the pelvis with the wings of the iliac bone and femurs, including the knee joints, therefore, it is also necessary to use sedation, which allows you to comply with all the requirements for styling. The resulting X-rays are assessed according to the main Xray characteristics of the hip joint, taking measurements on six parameters presented in the text of this article, and determining the type of dysplasia. Computed tomography and magnetic resonance imaging can reveal the instability of the pathology in the hip joint and improve understanding of the disease process.

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