Bone Measurement

1. Bone Measurement “How To” Guide

2. 2 ways to measure bones • Measure lengths and widths • Measure angles

3. Inside Measurement • Nasal Width • Measure at widest spot • Measuring with Calipers – inside measurements • place calipers inside space • spread out until touch both edges of object • read bottom row labeled ‘inside’

4. Reading Calipers: Inside Measurement Second # is the first spot bottom and top lines match up. Read as a decimal. = .1 Measurement 40.1 mm First # is where 0 lines up. = 40

5. You try… What is the inside measurement reading? Answer: 35.1mm

6. Outside Measurement • Nasal Height • Nasion to Nasal Spine Nasion Nasal spine • Measuring with Calipers – outside measurements • place calipers on outside of area • bring in until touch both edges of object • read top row labeled ‘outside’

7. Reading Calipers: Outside measurement First # is where 0 lines up. = 40 Measurement 40.1 mm Second # is the first spot bottom and top lines match up. Read as a decimal. = .1

8. You try… What is the outside measurement reading? Answer: 10.1mm

9. Measurement with a protractor 2. 0 line along one side of angle 1. Dot directly under 90 at vertex of angle 3. Measurement value where angle’s other side crosses protractor Answer: 120 degrees

10. You try…. What is the measurement of this angle? Answer: 70 degrees

11. Pelvic measurement: sub-pubic angle • dot of protractor on pubic • symphysis where bones meet ramus of L. ischium Pubic symphysis • 0 line along ramus of • left ischium • read measurement on ramus of • right ischium Answer: 77 degrees

12. Sources Ward’s Natural Sciences. 2002. Sherlock Bones: Identification of skeletal remains. p.10,11,12, 16, and pelvis, skull