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Abstract

Case Description—An 8-month-old crossbred dog was evaluated because of an oronasal fistula following 2 previous attempts to surgically correct a secondary palate defect.

Clinical Findings—Three months after initial evaluation and successful closure of the soft palate section of the secondary palate defect via 2 surgeries, an oronasal fistula was present. The oronasal fistula was predominantly right sided, involving the rostral third of the hard palate and, at the widest aspect, spanning the transverse palate at the level of the maxillary canine teeth.

Treatment and Outcome—Following CT of the rostral aspect of the skull, rapid prototyping technology was used to create a stereolithographic model of the skull, allowing fabrication of a customized titanium plate for intranasal stenting. The titanium plate was inserted via a rostral nasal approach and secured rostrally with 1.5-mm screws and caudally with 2.4-mm screws from the nasal bridge. An oronasal fistula formed laterally at the edge of the plate, but bonding of a dental glass ionomer product resulted in successful resolution of the fistula.

Clinical Relevance—Results suggested that rapid prototyping and creation of customized implants may provide an option for the management of large or nonreconstructible oronasal defects in dogs.

Restricted access
in Journal of the American Veterinary Medical Association

Abstract

Objective—To develop an in vivo CT method to measure inclination angles and motion of the sacroiliac joints in dogs of performance breeds.

Animals—10 German Shepherd Dogs and 12 Greyhounds without signs of lumbosacral region pain or neurologic problems.

Procedures—CT of the ilium and sacrum was performed in flexed, neutral, and extended hind limb positions. Lines were drawn on volume-rendered images acquired in the flexed and extended positions to measure motion of the ilia relative to the sacra. Inclination angles of the synovial and ligamentous components of the sacroiliac joints were measured on transverse-plane CT images acquired at cranial and caudal locations. Coefficients of variance of measurements were calculated to determine intraobserver variability.

Results—Coefficients of variance of measurements ranged from 0.17% to 2.45%. A significantly higher amount of sacroiliac joint rotational motion was detected for German Shepherd Dogs versus Greyhounds. The cranial synovial joint component had a significantly more sagittal orientation in German Shepherd Dogs versus Greyhounds. No significant differences were detected between breeds for x- or y-axis translational motion or caudal synovial or ligamentous joint component inclination angles.

Conclusions and Clinical Relevance—The small amounts of sacroiliac joint motion detected in this study may buffer high-frequency vibrations during movement of dogs. Differences detected between breeds may be associated with the predisposition of German Shepherd Dogs to develop lumbosacral region signs of pain, although the biological importance of this finding was not determined. Future studies are warranted to compare sacroiliac joint variables between German Shepherd Dogs with and without lumbosacral region signs of pain.

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in American Journal of Veterinary Research