Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_
Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_ Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_
Poster Topic: Trauma - Femur Abstract number: 26337 A BIOMECHANICAL ANALYSIS OF LOCKING PLATE FIXATION WITH MINIMALLY INVASIVE PLATE OSTEOSYNTHESIS IN A SUBTROCHANTERIC FRACTURE MODEL Hee-June KIM, Chang-Wug OH, Sung-Ki PARK Kyungpook National University Hospital, Daegu (KOREA) Objective: to establish the relative fixation strengths of a locking plate, a dynamic condylar screw-plate, and a long proximal femoral nail.Methods: The study involved three groups of composite large femoral synthetic bones of 5 specimens per group; plating using a locking compression plate-distal femur (LCP-DF), plating using a dynamic condylar screw-plate (DCS), and nailing using long proximal femoral nail (long PFN). A gap osteotomy model was used to simulate a comminuted subtrochanteric femur fracture. A vertical load was applied at 10 mm/min until femur failure. Results: Fixation strength (load/moment to failure) of LCP DF (1330 N, range; 1217~1460 N) was 26.6% and was greater in axial loading than DCS (1050.5 N, range; 956.4~ 1194.5 N) and 250% less in axial loading than long PFN (3633.1N, range; 3337.2~4020.4N) (P = 0.002). Ultimate displacement in axial loading was similar for LCP-DF (18.4mm, SD=1.44), DCS (18.3mm, SD=3.25), and long PFN (16.7mm, SD=1.82).Conclusions: The LCP-DF construct proved stronger than the DCS in terms of ultimate strength by biomechanical testing of a simulated subtrochanteric femur fracture with comminution. Although the nail construct proved strongest, the biomechanical performance of the locking plate construct may lend credence to the use of a locking plate versus the DCS plate for minimally invasive plate osteosynthesis of subtrochanteric femur fractures, which may be technically difficult to fix using a nail. 530
Poster Topic: Trauma - Femur Abstract number: 26543 CASE REPORT: UNUSUAL CASE OF REFRACTURE OF THE FEMORAL SHAFT IN A 16-YEAR OLD BOY Christian GIESSAUF, Karl GRUBER District hospital of Weiz, Austria, Weiz (AUSTRIA) IntroductionDue to open growth plates fractures of the long bones in teenagers represent a challenge for both the surgeon and the implant. Case ReportWe present a 16-year old boy who sustained a left femoral shaft fracture due to a motorcycle accident. Concomitantly, he had an open fracture of the left patella. He was normal weight (body mass index 20.7) Plate osteosynthesis of the femoral shaft and fixation of the patella with Kirschner wires and screws were performed the same day. Radiographs were taken routinely every second week. The patient was free of complaints 2 months after surgery. Under permission of full weight-bearing he sustained a refracture of the femur and a breakage of the plate. The implant was removed and the fracture was stabilized by intramedullary nailing. Seven months later the patient presented with a re-fracture of the femur and a bending of the intramedullary nail without having a proper accident. The nail was removed and after delayed bone healing resolved by distal dynamic sampling the patient was able to return to work 18 months after the first operation and reached his preinjury level of activity 2 years after the initial operation.Discussion The initial operation was performed by open reduction and internal fixation with plate osteosynthesis due to open growth plates. No implant failure was detected and no reason for breakage of the plate and bending of the nail was found. It still remains unclear weather the patient concealed further accidents or untimely full weight-bearing. 531
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Poster<br />
Topic: Trauma - Femur<br />
Abstract number: 26543<br />
CASE REPORT: UNUSUAL CASE OF REFRACTURE OF THE FEMORAL SHAFT<br />
IN A 16-YEAR OLD BOY<br />
Christian GIESSAUF, Karl GRUBER<br />
District hospital of Weiz, Austria, Weiz (AUSTRIA)<br />
IntroductionDue to open growth plates fractures of the long bones in teenagers<br />
represent a challenge for both the surgeon and the implant. Case ReportWe present<br />
a 16-year old boy who sustained a left femoral shaft fracture due to a motorcycle<br />
accident. Concomitantly, he had an open fracture of the left patella. He was normal<br />
weight (body mass index 20.7) Plate osteosynthesis of the femoral shaft and fixation<br />
of the patella with Kirschner wires and screws were performed the same day.<br />
Radiographs were taken routinely every second week. The patient was free of<br />
complaints 2 months after surgery. Under permission of full weight-bearing he<br />
sustained a refracture of the femur and a breakage of the plate. The implant was<br />
removed and the fracture was stabilized by intramedullary nailing. Seven months<br />
later the patient presented with a re-fracture of the femur and a bending of the<br />
intramedullary nail without having a proper accident. The nail was removed and after<br />
delayed bone healing resolved by distal dynamic sampling the patient was able to<br />
return to work 18 months after the first operation and reached his preinjury level of<br />
activity 2 years after the initial operation.Discussion The initial operation was<br />
performed by open reduction and internal fixation with plate osteosynthesis due to<br />
open growth plates. No implant failure was detected and no reason for breakage of<br />
the plate and bending of the nail was found. It still remains unclear weather the<br />
patient concealed further accidents or untimely full weight-bearing.<br />
531