A method of making a metal one-piece custom post member for non- parallel rooted teeth, including preparation of two root canals of the tooth by using a drill, making a funnel-shaped parallel fixing of entries in the root canals, inserting two posts made of burn-out plastic and sized to the root canals, into the canals, such that upper ends of the posts extend out therefrom, each plastic post having a body shaped as a partially flattened round stick, providing a flattened circle cross- section, one end thereof forming an enlarged cap shaped similarly to the body, treating upper ends of the posts that extend out of the canals with a self-curing resin to bind the posts together to form a plastic one- piece custom post member, removing the plastic one-piece custom post member from the tooth, casting a metal one-piece custom post member of the same size and dimensions from the plastic one-piece custom post member such that the metal one-piece custom post member has two metal posts extending therefrom, each being sufficiently thin so as to be flexible, and securing the cast metal one-piece custom post member in the tooth, with each metal post extending within one root canal, thereby dividing a required section of the tooth to attain a best possible tensile strength which is distributed over the two posts of the metal one- piece custom post.
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