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An Urban Experience
WSVA7-0161 ORTHOPEDICS
DETERMINATION OF MAXIMAL DENSITY LOCATION OF DOGS FEMUR (OS FEMORIS) BASED ON DENSITOMETRIC MEASUREMENTS DATA
N. Oborins1, A. Ilgažs1, S. Aleksandr2
1Latvian University of Agriculture- Faculty of Veterinary Medicine, Clinical institute, Jelgava, Latvia
2Estonian University of Life Sciences, Department of Clinical Veterinary Medicine, Tartu, Estonia
Introduction
Densitometry may be used as a diagnostic tool in predicting potential orthopedic problems in dogs. The study describes the densitometric measurements data of femur (os femoris) in 15 dogs.
Objectives
The purpose of the study was to determine statistically proven maximal density location in femur in dogs.
Methods
Series of densitometric measurements in three different points of femur: proximal (collum femoris), medial (corpus femoris) and distal (facies poplitea) in dogs with different age and breed were conducted to determine maximal density location. LUNAR DPX-IQ densitometer was used on femoral bone prepared from soft tissues, results were obtained in g/cm2. We hypothesized that medial part of femur has the maximal density.
Results
Measurements showed that despite of dogs age and weight, density of bone structure is much higher in the medial point of femur. Average density in proximal point is 0,363 g/cm2, in medial point 0,537 g/cm2 and in distal point 0,372 g/cm2.
WSVA7-0260 ORTHOPEDICS
TREATMENT OF A MASSIVE OSTEOCHONDRITIC LESION IN THE LATERAL FEMORAL CONDYLE WITH A CUSTOM RESURFACING IMPLANT AND PATIENT-SPECIFIC INSTRUMENTATION
C. Zindl1, H. Radke1, R.G. Whitelock1, M.J. Allen2
1Department of Veterinary Medicine, Queen’s Veterinary School Hospital, Cambridge, United Kingdom 2Department of Veterinary Medicine, Surgical Discovery Centre, Cambridge, United Kingdom
Introduction
Osteochondrosis dissecans (OCD) lesions in the
femoral condyle are common in large breed dogs. The reconstruction of very large, or irregularly shaped, defects can be extremely challenging. In the human knee, metallic focal resurfacing implants are available.
Objectives
The objective of this case study was to resurface a large OCD lesion in a young large breed dog with a custom made metallic implant and to determine the short- and long-term clinical outcome.
Methods
A 1.5 year old, neutered female, Bucovina Shepherd Dog, (46kg) was referred for treatment of bilateral femoral condyle OCD. Computed tomography (CT), identified
the presence of very large subchondral defects in the most caudal aspect of the lateral femoral condyle (12mm x 15mm (left) and 10mm x 18mm (right)). A custom implant was designed and manufactured by BioMedtrix LLC. Patient specific surgical guides were designed and fabricated by 3D printing. The implant was positioned on the prepared femoral condyle after lateral synovectomy and meniscectomy. After recovery the patient was discharged with antibiotics and analgesia.
Results
Post-operative radiographs confirmed satisfactory prosthesis positioning. Although mild lameness is still evident on force plate examination at 6 and 12 weeks post-surgery, clinical recovery has been very good.
Conclusions
A custom resurfacing implant is a reasonable option for managing extensive defects in the lateral femur. 3D printing of surgical guides is fast, easy and affordable.
42ND WORLD SMALL ANIMAL VETERINARY ASSOCIATION CONGRESS AND FECAVA 23RD EUROCONGRESS
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Conclusions
The hypothesis was proven. Corpus femoris was indicated as a point of maximal density in dogs.
   
































































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