Title Page
Contents
ABSTRACT 9
1. Introduction 11
2. Materials and Methods 14
2.1. Sample Preparation 14
2.2. Surgical Procedures 16
2.2.1. Group A (Nitinol Staple) 16
2.2.2. Group B (No.2 FiberWire Suture) 16
2.2.3. Group C (2 mm FiberTape Suture) 16
2.3. Biomechanical Testing 20
2.3.1. Longitudinal shear (cranial - caudal) 20
2.3.2. Lateral distraction 20
2.3.3. Torsion (ventral - dorsal) 20
2.4. Statistical Analysis 21
3. Results 24
3.1. Loads at 1 mm Displacement 24
3.1.1. Longitudinal shear (cranial - caudal) 24
3.1.2. Lateral distraction 24
3.1.3. Torsion (ventral - dorsal) 24
3.2. Loads at 2 mm Displacement 25
3.2.1. Longitudinal shear (cranial - caudal) 25
3.2.2. Lateral distraction 25
3.2.3. Torsion (ventral - dorsal) 25
3.3. Failure Loads 25
3.3.1. Longitudinal shear (cranial - caudal) 25
3.3.2. Lateral distraction 26
3.3.3. Torsion (ventral - dorsal) 26
3.4. Displacement at Failure 28
3.4.1. Longitudinal shear (cranial - caudal) 28
3.4.2. Lateral distraction 28
3.4.3. Torsion (ventral - dorsal) 28
3.5. Type of Failure 30
4. Discussion 36
5. Conclusion 40
References 41
Abstract (in Korean) 48
Table 1. Loads(N) at 1 mm, 2 mm and Failure Displacement (Mean ± SD) 27
Table 2. Displacement at Failure (mm) 29
Table 3. Type of Failure 31
Figure 1. The 3D bone model of canine sternums and ribs 15
Figure 2. Illustrations of the methods of median sternotomy closure 18
Figure 3. Materials of sternal closure technique 19
Figure 4. An Illustration of Directions of load application on sternal models 22
Figure 5. Photographs of Biomechanical tensile force testing 23
Figure 6. Box-Whisker plot of loads at 1 mm, 2 mm displacement and failure in longitudinal shear experiment. 32
Figure 7. Box-Whisker plot of loads at 1 mm, 2 mm displacement and failure in lateral distraction experiment. 33
Figure 8. Box-Whisker plot of loads at 1 mm, 2 mm displacement and failure in torsion experiment. 34
Figure 9. Box-Whisker plot of displacement at failure in all experiments. 35