Abstract: A tooth tapering control guide can be used to create an accurate and consistent taper angle for a target tooth. The guide includes a telescoping member which may be secured to a tooth that is adjacent to the target tooth. The telescoping member includes an upper rod and a lower rod that are telescopically connected. The upper rod of the telescoping member is generally L-shaped, including a vertical portion and a horizontal portion that extends normal to the vertical portion. The horizontal portion includes a rectangular slot along its lower surface and a clasp rod that is slidable within the slot. The vertical portion telescopically receives the lower rod. The clasp rod includes a clasp at a lower end that is attachable to a drill. Once the drill clasp is secured to the drill, the drill bit can be maintained at a constant angle (e.g., 90 degrees) with respect to the target tooth.