• Journal of Veterinary Clinics
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• v.40 no.4
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• pp.268-275
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• 2023

In this paper, we designed 3D-printed orthopedic splint models for patient-specific external coaptation on fracture healing and analyzed the stability of the models through finite element method (FEM) analysis under compressive load conditions. Polylactic acid (PLA) and acrylonitrile-butadiene-styrene (ABS) based 3D splint models of the thicknesses 1, 3, 5 and 7 mm were designed, and Peak von Mises stress (PVMS) and maximum displacement (MD) of the models were analyzed by FEM under compressive loads of 50, 100, 150, and 200 N. The FEM results indicated that PVMS and MD values, regardless of material, had a negative correlation with the thickness of the models and a positive correlation with the compressive load. There was a risk of splint deformation under conditions more extreme than 100 N with 5 mm thickness. For successful clinical application of 3D-printed orthopedic splints in veterinary medicine, it is recommended that the splint should be produced not less than 5 mm thickness. Also, it is expected to be stable when the splint is applied to situations with a compressive load of 100 N or less. There is an advantage of overcoming the limitations of the existing bandage method through 3D-printing technology as well as verifying the stability through 3D modeling before application. Such 3D printing technology will be widely used in veterinary medicine and various fields as well as orthopedics.

• Journal of Veterinary Clinics
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• v.29 no.1
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• pp.8-11
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• 2012

The results of surgical repair for pelvic factures in 31 dogs were reviewed. Lameness and weight bearing scores were used to evaluate functional recovery of the hind limbs. Simple fracture occurred in sacroiliac joint (n = 5) and ilium (n = 3). Pelvic fractures had acetabular (n = 7) and non-acetabular fractures (n = 23). Acetabular fracture cases were composed of additional surgical treatments with femoral head and neck ostectomy (FHNO) (n = 4) and only acetabular rim fixation (n = 3). Simple fractures had more rapid initial and complete recovery times than multiple fractures. Non-acetabular fracture cases (initial recovery time: 2.7 weeks, complete recovery time: 9.1 weeks) had more rapid initial and complete recovery times than acetabular fracture cases (8.4, 12.5 weeks) (p < 0.05). In addition, the cases of additional surgical treatment with FHNO (5.3, 7 weeks) had more rapid mean recovery times than surgical treatment without FHNO (11.1, 16.3 weeks). Surgical approach with FHNO in acetabular fracture was an alternative method to treat pelvic fractures in small breed dogs.

• Journal of Veterinary Clinics
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• v.33 no.1
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• pp.51-57
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• 2016

In this study, the features of canine lymphoma on fluorine-18 fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) were evaluated in three small breed dogs. In case 1, ultrasonography and CT indicated neoplastic involvement of the sternal, right axillary, submandibular, lower cervical, tracheobronchial, mesenteric, and sublumbar lymph nodes; spleen; and liver. However, intense FDG uptake on PET/CT images was detected only for the lymph nodes and spleen. No FDG uptake by the liver was detected for case 1 despite the confirmation of lymphoma by cytology. In case 2, ultrasonography and CT indicated neoplastic involvement of the axillary, mesenteric, and sublumbar lymph nodes and the spleen, while intense FDG uptake on PET/CT images was detected for the axillary and a few mesenteric lymph nodes, and the spleen. FDG uptake was additionally observed from popliteal lymph nodes, however there was no uptake by the sublumbar lymph nodes and some mesenteric lymph nodes. In case 3, neoplastic changes in the splenic, mesenteric, and sublumbar lymph nodes and spleen were suspected on ultrasonography, and lower cervical and popliteal lymph node involvements were additionally detected on PET/CT. Compared to ultrasonography, repeated PET/CT showed increased FDG uptake by the lymph nodes at an earlier stage after chemotherapy in case 3. This study illustrated the features of PET/CT in canine lymphomas and compared those to ultrasonography and CT findings. FDG uptakes were not detected from some lesions which were suspected to be neoplastic involvement in case 1 and 2. We could not clearly explain the reason of this result in the present study because cytological or histological examination was not performed for lesions that showed different results on ultrasonography, CT, and PET/CT. Further studies on the subclassification of canine lymphoma and the sensitivity and specificity of PET/CT for the detection of canine lymphoma are required. PET/CT data can provide useful information for predicting the therapeutic response at an early stage after treatment.