| 摘要 |
A tooth preparation or dental restoration modification apparatus comprises a material removal device for removing material from an object such as a tooth or dental restoration form, a guide element operatively connected to the material removal device for enabling a guiding of the material removal device under the control of an operator, and a light projector for projecting a visible point of light onto a predetermined location on the object, thereby serving as an indicator to the operator that material is to be removed from the object at the location.
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