Embalming Science and Restorative Art
Embalming Science and Restorative Art tests technical judgment: solution math, injection and drainage, cavity treatment, formaldehyde safety, and reconstruction of features before cosmetics.
Core science
- Arterial embalming replaces blood and body fluids with a preservative solution; cavity embalming aspirates and injects the thorax and abdomen.
- Fluid index is grams of formaldehyde per 100 mL. A 20-index fluid is 20% formaldehyde; a 2% arterial solution requires a 10% dilution of that fluid.
- OSHA formaldehyde limits are 0.75 ppm as an 8-hour TWA, 2 ppm STEL, and 0.5 ppm action level; use ventilation, monitoring, and PPE.
Worked example
You need 3 gallons of 2% solution from 20-index fluid. 2% ÷ 20% = 0.10, so use 10% fluid. Three gallons is 384 oz; 10% is 38.4 oz of 20-index fluid plus 345.6 oz water. If you used 30-index fluid, the fraction would be 2/30 = 6.67%, showing why index changes the mix.
Restorative art
Reconstruct major defects with wax, putty, or tissue builder before applying cosmetics; match foundation to skin tone and use lighting that reveals symmetry.
Traps
Confusing index with final strength. Using cavity fluid as arterial fluid. Skipping cavity treatment after good arterial injection. Applying cosmetics over unprepared tissue. Ignoring formaldehyde exposure limits.