A stone or foci of canal wall calcification is the presence of a stone or calcium salt deposit at the site. Stones or foci of canal wall calcification are usually the subject of an imaging report, meaning that stones or calcium salt deposits are present at the site. Stone formation is associated with occupational factors, dietary habits, genetics, systemic metabolic abnormalities, prolonged localized obstruction, or other causes. Calcified foci are associated with prolonged local irritation of parts of the tissue, chronic infections, and calcium salt metabolism. Whether it is stones or calcified foci or both, further detailed examination is needed to find out the cause of the disease and carry out corresponding treatment. It is important to note that stones are not only treated by the stone itself, but also by prevention of the cause or trigger of the stone to prevent its re-formation.