Gutta-percha endodontic filling points are composed primarily of which material by percentage weight?

Gutta-percha endodontic points are composed of: approximately 66% zinc oxide (filler, provides rigidity and radiopacity), 20% gutta-percha polymer (matrix, trans-polyisoprene), 11% heavy metal sulfates (radiopacifiers such as barium sulfate), and 3% waxes and resins (plasticizers). Zinc oxide is the largest component by weight, making it the correct answer. This is consistent with multiple published analyses and confirmed by the Wiley dental textbook collection. The gutta-percha polymer gives the material its name and provides elasticity and thermoplastic properties that allow condensation and thermoplasticization techniques.