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Fig.1: The side view of a Marking Bur (MB) and 4.5 mm single drill (SD).
Fig.2: The tip of MB is sharp, making a dimple of the initial osteotomy so that SD does not wobble while it is being used.
Xin Wei, DDS, PhD, MS 1st edition 11/24/2016, last revision 11/24/2016