| 摘要 |
A dental post (10) for securely retaining a dental restoration (52) on a prepared tooth stub (40). The dental post is formed of an elongated cylindrical pin (12) having a longitudinal axis. Helical grooves (26) are provided about the periphery of the pin for retaining the pin secured within a cement prepared bore (48) within the tooth stub (40). An outer contour is formed along the longitudinal length of the pin (12) to define annular (26, 28) retaining ledges axially spaced apart along the pin interspersed with inwardly tapered pin sections. The ledges serve to aid in the retention of the pin in the bore and increase the strength of the pin reducing the possibility of pin shear. |
