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Bone Measurement

Bone Measurement

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Bone Measurement

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Presentation Transcript

  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