Skeletal Histomorphometry
Definition
Microscopic counting of secondary osteons and fragmentary osteons per unit area of cortical bone cross-section as a supplementary age indicator; requires destructive sampling but provides age-related information independent of surface morphological changes.
- What is counted
- Secondary and fragmentary osteons per unit area
- Sample type
- Cortical bone cross-section, thin sectioned
- Sampling method
- Destructive, requires removing bone tissue
- Key advantage
- Independent of surface morphology changes
Common questions
Why use histomorphometry when other age indicators exist?+
It draws on internal bone microstructure rather than joint surface wear, so it remains useful when the pelvis or cranial sutures are damaged, missing, or otherwise unreadable.
What limits its routine use in casework?+
It requires destructive sampling, cutting and thin-sectioning bone, which is not always permissible or practical, so it is typically reserved as a supplementary method rather than a first-line one.
Related terms
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- Cranial Suture Closure
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- Dental Cementum Annulations
- Annual bands in the dental cementum (analogous to tree rings) that can be counted microscopically from a thin tooth section to estimate...
- Ectocranial Scoring
- Assessment of cranial suture closure from the outer surface of the skull; slightly later than endocranial closure and more easily assessable on...
- Iscan-Loth Method
- A nine-phase scoring system for the sternal end of the right fourth rib (1984-1985), providing separate male and female reference data for...
- Meindl-Lovejoy Vault System
- A five-site composite scoring system for ectocranial suture closure at midlambdoid, lambda, obelion, anterior sagittal, and bregma sites, derived from the Hamann-Todd...
- Over-50 Ceiling
- The documented failure of most standard skeletal phase methods to distinguish ages above approximately 50 to 55 years with useful precision; a...
- Sternal Rib End
- The anterior (medial) end of the rib that articulates with the sternum via costal cartilage; its progressive pit formation, wall porosity, and...
- Wormian Bones
- Accessory ossicles (Inca bones) within cranial sutures, particularly the lambdoid; their presence interrupts suture scoring and must be noted before applying Meindl-Lovejoy...