Deformity

Authors: Wendelburg KM, Lewis DD, Sereda CW, Reese DJ, Wheeler JL.
Journal: VCOT

Our purpose was to report the use of an interlocking nail-hybrid external fixator construct to correct distal femoral deformities in three dogs. Radiographs, computed tomography and a three-dimensional model were used to plan the surgical procedure. A femoral osteotomy or ostectomy was performed at the level of the centre of rotation of angulation in all three dogs. Angular and rotational deformities were corrected acutely. Distraction osteogenesis was performed to lengthen each femur postoperatively.

Authors: Might KR, Hanzlik KA, Case JB, Duncan CG, Egger EL, Rooney MB, Duerr FM.
Journal: Vet Surg

Objective: To determine the effect of proximal ulnar osteotomy (PUO), distal ulnar osteotomy (DUO), and DUO with release of the interosseous ligament (DOLR) on displacement of the proximal ulna at the radioulnar joint. Study Design: Experimental mechanical study. Sample Population: Cadaveric, skeletally mature canine thoracic limb pairs (n=11). Methods: Thoracic limbs disarticulated at the elbow were randomly assigned to 1 of 2 groups: (A) limbs were tested with no treatment (NOTX), then with PUO; (B) limbs were tested with DUO followed by DOLR.

Authors: D. J. F. von Pfeil (1), C. E. DeCamp (2), C. Agnello (3), B. A. Steficek (4)
Journal: VCOT

A five-month-old male, German Shorthaired Pointer dog was presented for severe, bilateral, thoracic-limb-lameness, with elbow swelling, pain, and crepitus. Radiography and computed tomography confirmed bilateral incomplete ossification of the humeral condyles (IOHC), with a non-displaced incomplete fracture of the left medial epicondylar crest and condylar deformity, characterised by enlargement of the trochleas with extension of the disto-medial aspect of the bone below the normal elbow joint level, and a deformed proximo-medial aspect of the ulna and radius.

Category: Deformity - Elbow - Pediatrics
Authors: Ratterree WO, Glassman MM, Driskell EA, Havig ME.
Journal: JAAHA

This report describes a 4 mo old intact male Akita that presented for evaluation of a life-long history of facial swelling and failure to thrive. Physical examination revealed an enlarged cranium with prominent bony swellings on the maxillary bone, excessive laxity and crepitus involving multiple joints, and proprioceptive deficits. Radiographs demonstrated multiple osseous abnormalities including endosteal thickening of the femurs and ilium. Necropsy revealed gross compression of the cerebellum and brainstem.

Authors: Temwichitr J, Leegwater PA, Auriemma E, Van't Veld EM, Zijlstra C, Voorhout G, Hazewinkel HA.
Journal: AJVR

Objective-To study radiographic and genetic aspects of hereditary radial head subluxation in Bouviers des Flandres. Animals-26 related Bouviers des Flandres affected with bilateral subluxation of the radial head, 10 unaffected related dogs, and 29 unrelated Bouviers des Flandres with diagnoses of nonskeletal diseases. Procedures-All dogs were radiographically studied, and their DNA was analyzed with a genome-wide screen of 1,536 single nucleotide polymorphisms. In addition, karyotyping was performed in an unaffected dam and its affected offspring.

Authors: Ting D, Petersen SW, Dejardin LM.
Journal: VCOT

Bone transport osteogenesis, as described by Ilizarov, has been used to resolve segmental bone defects in both human and veterinary patients. These defects are created when a large osseous tumour, sequestrum, or non-union fracture is resected. This report documents two cases in which the principle of bone transport osteogenesis was applied by utilising the Ilizarov technique to bridge large osseous defects resulting from debridement of an infected nonunion fracture (case 1) and debridement of a sequestrum (case 2).

Authors: RUTH J. LAMBERT, DVM 1 and KIRK L. WENDELBURG, DVM, Diplomate ACVS 1
Journal: Vet Surg

ABSTRACT
Objective—To assess whether there is a difference in the mechanical medial proximal tibial angle (mMPTA) measured on a tangential caudocranial (tCdCr) radiographic projection versus a straight caudocranial (sCdCr) projection before and after inducing a varus deformity in the proximal tibia.
Study Design—In vitro study.
Sample Population—Cadaveric canine tibiae (n=4 pair).

Category: Deformity - Knee
Authors: Smit JJ, Temwitchitr J, Brocks BA, Nikkels PG, Hazewinkel HA, Leegwater PA.
Journal: Vet J

Chondrodysplasia (CD) is a disabling, hereditary disease in Labradors with short limbs, warranting genetic screening in families at risk. Segregation analysis of eight litters with 13 affected dogs showed that autosomal recessive inheritance was consistent with the observed incidence of CD in the litters. Possible involvement of eight candidate collagen genes (COL9A1, COL9A2, COL9A3, COMP, MATN3, COL2A1, COL11A1 and COL11A2) and of a sulfate transporter glycoprotein (SLC26A2) gene in eight affected dogs and in 14 related control Labradors was investigated.

Category: Biologics - Deformity
Authors: Lockwood A, Montgomery R, McEwen V.
Journal: VCOT6

Case Description: Two feline littermates were presented to the Auburn University Small Animal Clinic at the age of approximately 10 weeks. Both cats had varus thoracic limb deformities bilaterally and pelvic limb polydactyly. Clinical Findings: Radiographs revealed bilateral radial hypoplasia (hemimelia), generalised cardiomegaly, and pelvic limb polydactyly. Treatment and Outcome: No treatment was instituted. Cardiopulmonary changes will be monitored periodically. Clinical Relevance: The heritability of radial hemimelia has been suggested, but has yet to be proven.