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Bone Measurement
“How To” Guide
2 ways to measure bones
• Measure lengths and widths
• Measure angles
Inside MeasurementNasal 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’
First # is where0 lines up. = 40
Second # is the first spotbottom and top linesmatch up. Read as a decimal. = .1
Measurement 40.1 mm
Reading Calipers: Inside Measurement
You try…What is the inside measurement reading?
Answer:35.1mm
Outside MeasurementNasal Height
• Nasion to 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’
Nasion
Nasal spine
First # is where0 lines up. = 40
Second # is the firstspot bottom and top lines match up. Read as a decimal. = .1
Measurement 40.1 mm
Reading Calipers: Outside measurement
You try…What is the outside measurement reading?
Answer:10.1mm
Measurement with a protractor
1. Dot directly under 90 at vertex of angle
2. 0 line along one side of angle
3. Measurement value where angle’s other side crosses protractor
Answer: 120 degrees
You try….
What is the measurement of this angle?
Answer: 70 degrees
Pelvic measurement: sub-pubic angle• dot of protractor on pubic symphysis where bones meet
Pubic symphysis ramus ofL. ischium
• 0 line along ramus of left ischium
• read measurement on ramus of
right ischium
Answer: 77 degrees
Sources
Ward’s Natural Sciences. 2002. Sherlock Bones: Identification of skeletal remains.p.10,11,12, 16, and pelvis, skull