Modification of ESIN-osteosynthesis in a Femoral Fracture Model and Its Transmission to Clinical Practice
Elastic stable intramedullary nailing (ESIN) is the standard treatment for displaced diaphyseal femoral fractures in children. However, some literature report high complication rates (10-50%) in complex fractures. Data of our own patients with special emphasis on complications showed also mediocre results. Thus, a biomechanical study was conducted to search for modifications. In this study the stiffness with a 3rd nail implanted was compared to the classical 2 C-shaped configuration. For each of the 3 configurations of retrograde ESIN (titanium nails) eight composite femoral grafts (Sawbones®) with an identical spiral fracture were used: 2C configuration (2 C-shaped nails, 2x3.5 mm), 3CM configuration (3rd from antero-medial, + 1x2.5 mm) and 3CL configuration (3rd from antero-lateral, + 1x2.5 mm). Each group underwent biomechanical testing in 4-point bending, IRO/ERO and axial compression (0°/9°). Due to a significantly higher stiffness of 3CL in the anterior-posterior, internal rotation and 9° compression directions implantation of 3 nails became standard treatment for all dislocated femoral fractures at our department.
All patients were followed prospectively. The following data was collected: Type of osteosynthesis, any kind of complication (additional procedures like cast or external fixateur, Re-Do operations, misalignment, pseudarthrosis, skin irritation, infection), time until full weight bearing and time until implant removal. At follow-up the legs were controlled for a possible length discrepancy and a possible deviation of axis. Patients` satisfaction was controlled by CSQ (clients satisfaction score, Larsen et al 2002). Further on the Harris Hip Score was used. X-ray controls were done as standard care protocol after 1 and 3-4 months (dependend on age).
Level of Evidence IV Keywords: Elastic stable intramedullary nailing, biomechanical testing, fracture, femur, treatment, children, adolescents.
|Study Design:||Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||From Bench to Bedside: Modification of Elastic Stable Intramedullary Nailing With a 3rd Nail in a Femoral Spiral Fracture Model and Its Transmission to Clinical Practice|
- Intraoperative and postoperative complications [ Time Frame: 12 months ] [ Designated as safety issue: No ]All complications will be recorded: Intraoperative and postoperative complications, Re-Do operations
- misalignment [ Time Frame: 12 m ] [ Designated as safety issue: No ]
Follow up X-rays will be measured for misalignment in degrees (sagittal, frontal and transverse plane) Data will be grouped as
a) 1 - 5° b) 6 - 10° c) 11 - 15° d)16 - 20° e) 20 - 30° f) > 30°
- Pseudarthrosis [ Time Frame: 12 m ] [ Designated as safety issue: No ]
- Limb discrepancy [ Time Frame: 12 m ] [ Designated as safety issue: No ]
both legs will be measured from spina iliaca anterior superior to the lateral malleolus in cm.
Results will be grouped as:
a) 0 - 0.5 cm b) 0.6 - 1.0 cm c) 1.1 - 1.5 cm d) 1.6 - 2.0 cm e)> 2 cm
|Study Start Date:||January 2009|
|Study Completion Date:||December 2012|
|Primary Completion Date:||October 2012 (Final data collection date for primary outcome measure)|
Active Comparator: Femoral fracture, ESIN
Prospectively all patients treated with the 3-nail-configuration for dislocated femoral shaft fractures were enrolled; 25 patients are planned, 18 could be enrolled Comparison will be with own previous data of patients treated with the "classical" 2-C-shaped ESIN-osteosynthesis
|Procedure: 3-Nail-ESIN in femoral shaft fractures|