The invention provides a root canal filler (10) that can be positioned and secured within a cleaned root canal (12) of a tooth under reconstruction, the root canal filler (10) having a body ( 1 1) which operatively seals against all side walls of the root canal (12) and increases stability of a reconstructed tooth by providing a strengthened link between a crown (17) of a reconstructed tooth and side walls of the root canal (12).
