Microstructural And Mechanical Properties Of Human Ribs Joseph

More documents

Recommendations

Info

Walfisch G, Chamouard F, Lestrelin D, Tarriere C, Cassan F, Mack P, Got C, Guillon F, Patel A, Hureau J: Predictive Functions for Thoracic Injuries to Belt Wearers in Frontal Collisions and Their Conversion into Protective Criteria. Proceedings of the 29th Stapp Car Crash Conference, Society of Automotive Engineers, 851722; 1985. Wolff J.: Das Gesetz der Transformation der Knochen. Berlin: Hirschwald; 1892. Yoshikawa T., Turner C.H., Peacock M., Slemenda C.W., Weaver C.M., Teegarden D., Markwardt P., Burr D.B.: Geometric Structure of the Femoral Neck Measured Using Dual- Energy X-ray Absoptiometry. J. Bone Miner. Res., 9: 1053-1064; 1994. 14
Abstract CHAPTER 2 Orientation of Osteons in the <strong>Human</strong> Rib Cage The direction of osteons in cortical bone has been shown to be well correlated with the strongest loading direction of the bone as a whole. Therefore, determining the orientation of osteons in the rib cage is an important step in understanding the behavior of the rib cage under mechanical load. A total of 37 specimens were removed from several rib locations from a male and female cadaver. Eight histological slides were created from each 5 mm long section. Image analysis included the use of a computer algorithm created in Matlab to track the center of each osteon throughout the rib section. Analysis of the results showed variations in the osteon direction between samples taken from the anterior, lateral and posterior surfaces of the rib cage. The average offset angle between the osteon direction and the rib axis was determined to be 4.1, 3.2 and 1.9 degrees for the anterior, lateral and posterior surfaces respectively. The average offset angle for the anterior specimens was significantly higher than that of the posterior rib specimens (P=0.01) The lateral specimens also showed a significantly higher average offset angle than the posterior rib specimens (P=0.01). The results indicate a trend in osteon offset angle between the three locations studied. The offset angle is highest in the anterior region, then decreases in the lateral and is lowest in the posterior regions of the rib cage. Introduction Bone microstructure and its orientation play an important role in determining the response of the bone as a whole. Specifically, knowing the orientation of osteons in cortical bone is an important part in understanding the adaptation of bone to mechanical 15
Page 1 and 2: MICROSTRUCTURAL AND MECHANICAL PROP
Page 3 and 4: Acknowledgements The research descr
Page 5 and 6: Chapter 1 LIST OF FIGURES Figure 1:
Page 7 and 8: Introduction CHAPTER 1 The human th
Page 9 and 10: Background Thorax The thorax is com
Page 11 and 12: The joints between the vertebra and
Page 13 and 14: scale testing, whether it is perfor
Page 15 and 16: The objectives of this study are as
Page 17 and 18: Carter DR, Hayes WC: The Compressiv
Page 19: Martin R.B.: A Theory of Fatigue Da
Page 23 and 24: previous researchers as the directi
Page 25 and 26: Reference Cuts Figure 2: Histologic
Page 27 and 28: In order to separate the canals int
Page 29 and 30: (θaverage) is then calculated (Equ
Page 31 and 32: to facilitate respiration and there
Page 33 and 34: References Black J, Richardson SP,
Page 35 and 36: 1975, Patrick 1974, Ramet 1979). Th
Page 37 and 38: Figure 1: Location of rib specimens
Page 39 and 40: during the application of the strai
Page 41 and 42: Strain Gage I Ixx xx Figure 4: Geom
Page 43 and 44: The strain rates resulting from the
Page 45 and 46: Table 4: Results for cadaver M1 wit
Page 47 and 48: (P=0.05), lateral (P=0.01) and post
Page 49 and 50: posterior region is finally compare
Page 51 and 52: These ribs were chosen for comparis
Page 53 and 54: References Crandall JR, Bass CR, Pi
Page 55 and 56: APPENDIX A: Matlab Algorithms for H
Page 57 and 58: end save 'osteoncoord08A.txt' xy -a
Page 59 and 60: end end end end xcenter(j+1)=(right
Page 61 and 62: % This is a subroutine algorithm th
Page 63 and 64: % extxy{i} and extxy01{i} represent
Page 65 and 66: end d=0; i=1; for i=1:8 ocorin2=int
Page 67 and 68: end d8=d8+1; ocorin7(d7,:)=ocorex1(
Page 69 and 70: save 'int7.txt' int7 -ascii -tabs s
Page 71 and 72:
int01(k,1) & i == 1 65 if int02(j,1
Page 73 and 74:
ext01(k,1) & i == 1 67 if ext02(j,1
Page 75 and 76:
% The algorithm below creates image
Page 77 and 78:
end bwo(xy(i,1)+1,xy(i,2)-1)=1; bwo
Page 79 and 80:
%angle offset with horizontal axis
Page 81 and 82:
end % Interior surface osteon coord
Page 83 and 84:
save 'ext4.txt' ext4 -ascii -tabs s
show all

Microstructural And Mechanical Properties Of Human Ribs Joseph

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?