Gutta-percha points are primarily used in endodontics for root canal obturation. The largest component of these points is zinc oxide, which provides the bulk and rigidity necessary for the point to maintain its shape within the root canal. Zinc oxide also offers radiopacity and antimicrobial properties, aiding in the effective sealing and prevention of reinfection. The gutta-percha resin, although essential for flexibility and thermoplasticity, constitutes a smaller proportion. The dominance of zinc oxide ensures the point's mechanical stability during obturation procedures.

Reference: Endodontics: Principles and Practice, Mahmoud Torabinejad, Edition 6.