USE OF COMPOSITE BONE GRAFT IN LONG BONE FRACTURE HEALING STABILISED BY INTRAMEDULLARY PINNING IN CANINES
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Date
2017
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Rajasthan University of Veterinary and Animal Sciences, Bikaner
Abstract
The present study was conducted on 14 clinical cases of dogs with
diaphysial fractures of Humerus, Femur and Tibia/Fibula. Based on the technique
used, the animals were divided into two groups. In group I fractures in 8 dogs
were repaired with IM pins along with cerclage wires wherever required. In group
II fractures in 6 dogs were stabilized by using intra-medullary pinning and a
composite graft of calcium hydroxyapatite and fresh autologous bone marrow
aspirate was applied at the fracture site Pre-operative clinical and radiographic
examination was performed in all the cases. Orthopaedic surgeries were assisted
by intraoperative fluoroscopy wherever required. The process of fracture healing
was assessed on the basis of clinical and radiographic examination performed
during the follow up period. Clinically, lameness was graded in to 5 degrees from
0 to 4 in increasing order of severity on the basis of amount of weight bearing on
the affected limb during station and walking and pain at fracture site.
Radiographically, the process of healing was graded in 5 grades from 1 to 5 in
decreasing order of healing on the basis of amount of callus formation and
visibility of fracture line on post-operative radiographs. At 60th postoperative day
functional outcome in all cases was determined and graded as excellent, good,
fair and poor. Dogs in group II started partial weight bearing earlier than other
groups with a mean 3.33 ± 0.61 days. Least lameness was recorded at 30th
and 60th post-operative day in dogs of group II. At the time of complete weight
bearing, radiographic evaluation revealed best healing in dogs of group II. In
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group I fracture repair occurred with minimal callus formation. Functional
outcome was excellent in 10 cases, good in 3 cases and fair in 1 case. The
complications recorded in group I were IM pin migration in case A7 and swelling
at fracture site in cases A3 and A5 and group II , seroma formation at the level of
trochanteric fossa in A2 and A5 Complications recorded in group II were seroma
formation B and,B3. wound dehiscence and pin migrationin case B1. Implants
were removed in selected cases on satisfactory performance of the affected
limbwith complete healing of fracture supported by radiographic examination.in
some cases implants were removed due to the development of post-operative
complications.
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