Kerf Wall Squareness
Definition
The angle of the kerf walls relative to the bone surface; square walls indicate a stable, perpendicular saw stroke; canted walls indicate an angled stroke or implement wobble.
- Feature measured
- Angle of kerf walls relative to bone surface
- Square walls indicate
- Stable, perpendicular stroke
- Canted walls indicate
- Angled stroke or implement wobble
- Trauma category
- Sharp-force trauma, sawn bone
Common questions
Why does wall squareness matter for reconstructing a dismemberment?+
Consistent square walls across multiple kerfs suggest a controlled, repeated cutting motion at a fixed angle, while variable canting between kerfs can indicate hesitation, a struggle, multiple attempts, or a change of implement during the act.
Does canted wall angle alone identify the type of saw used?+
No, wall angle mainly reflects the operator's stroke direction and control rather than the saw type itself. Tooth shape, set pattern, and blade thickness, read from the kerf floor and walls together, are needed to narrow down the class of saw.
Related terms
- Breakaway Spur
- A chip or spur of cortical bone on the exit face of a saw kerf, produced when the final tooth exits the...
- Class Characteristics
- Features deliberately or systematically imparted to a group of items by design or manufacture, such as the calibre of a bullet, the...
- False-Start Kerf
- A short, incomplete saw mark adjacent to the main kerf, produced when the cutter repositioned the saw after an unsatisfactory initial entry...
- Hinge Fracture
- A curved crack running from the deepest point of a chop kerf to the opposite cortex, producing a free-floating triangular fragment; characteristic...
- Incised Wound
- A wound produced by a sharp-edged implement. Margins are clean, without contusion or bridging. Depth is less than length in a classic...
- Kerf
- The groove or channel cut into bone by a sharp implement; its width, wall angle, floor texture, and profile are the primary...
- Residual Tooth Marks
- Individual tooth impressions in the floor of an incomplete saw kerf, allowing direct measurement of tooth geometry and TPI when the saw...
- Tooth Set
- The lateral bending of saw teeth alternately left and right of the blade body, producing a kerf wider than the blade itself;...
- TPI (Teeth per Inch)
- The number of teeth on a saw blade per inch of blade length; determines the spacing of striation marks on the kerf...