Adult age estimation
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What is an adult?
- Bones have stopped growing longitudinally
- teeth have fully erupted
- generally ~18+
Adult ageing methods look at ______ changes in the skeleton.
Primarily _____ of joint surfaces
- Senescent changes
what are common skeletal collections used?
- Terry collection
- Hammam-Todd collection
- Coimbra identified skeletal collection
- raymond dart collection
Why might there be bias when it comes down to ageing methods?
devised on specific populations
Large canadian age/sex collection
Grant collection - U of T
which is more difficult adult or juvenile ageing?
Adult - very difficult to assign indivduals tight age categories so place age categories with wider age ranges
What are 3 common age systems used, which one is used in our class and what is it divided into?
- North american system
- British system
- continental european system
- We use British system
- -young adult (18-25)
- -young middle adult (26-35)
- -Old middle adult (36-45)
- - Old adult (46+)
what are bones that have not finished fusing in adults?
- Os Coxa
who was Todd T.W?
what collection did he use
Who did he study?
What bone did he study
how many stages did he use? what age frame?
what can be used with this method
studied male and female white skeletons from Hamann-todd collection
Used the pubic symphysis
determined 10 stage ageing system ranging between 16 & 50 years
What is the suchey brooks method?
What specimans did she use?
Skeletons must be ____ first
what bone did she investigate?
Based on american austopsy specimans from los angeles county coroner
different standards for males and females so skeleton must be Sexed first (ancestry not a factor)
ageing with pubic symphysis - suchey brooks
Ageing with auricular surface - developed by who?
using what collection?
why is the auricular surface a useful method?
difficult or easier to use then pubic symphysis?
same for males and females?
frequently preserved when pubic symphyss destroyed
age a lot more difficult to assess than pubic symphysis - requires a lot of pracitse
Ageing with auricular surface using lovejoys method
- 1 - 20-24 billowing and fine granularity
- 2 - 25-29 reduction of billowing but retention of youthful apprearence
- 3 - 30-34 loss of billowing increased granularity
- 4 - 35-29 unifor coarse granularity
- 5 - 40-44 transition from coarse granularity to dense surface
- 6 - 45-49 - completion of densification with complete loss of granularity
- 7- 50-59 - dense irregular surface with rugged topography . Activity in retroauricular surface
- 8- 60+ - breakdown of surface with marginal lipping, macroporosity and marked retroauricular ctivity.
Transverse organisation: youthful billows replaced by striae then all transverse org. lost
texture: youthful fine grain become coarser with age then turns to dense smooth bone which eventually degenerates
Porosity: increases with age- microporosity appreas then macroporosity
regions of ilium used for auricular surface ageing
Apex - portion of auricular surface that articulates with posterior arcuate line
Superior demiface - part of auricular surface below apex
Inferior demiface - part of auricular surface below apex
Retroauricular area - area between auricular surface and posterir inferir iliac spine
ageing with auricular surface (lovejoy)
Read description of phases and see which description best fits auricular surface
don't rely on pictures - only illustrate general features of phases
Who are buckberry and chamberlain (2002)?
What systerm did they develop and for what bone?
Composite scores created that correspond to ____ ___
- Developed system for ageing auricular surface that scores age-related stages for different features:
- -transverse organisation
- -surface texture
- -micro/macro porosity
- -changes in apex
correspond to __Age___ ___Ranges__
Blind tested method on known ___/___ population of ___, London.
Showed revised technique _____ to apply with Low
inter-& intra _____ _____
- Observer error
Who developed method of ageing with cranial sutres?
Mendl and lovejoy
Ageing with auricular surface
transverse organisation -
youthful billows replaced by striae then all transverse organisation lost
- increases with age (micro to macro)
- texture - fine grain to coarse grain, smooth,dense bone
- retroauricular area - bone startss to smooth, eventually exhibits ostephytes and outgrowths
starts out thin and sharp, thickens and becomes blunt with age
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