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When the tap is removed from the osteotomy of #8, the middle portion of the 3.5x20 mm drill at the site of #9 is seen to pass the socket of the left mesiodens (Fig.6: <).
The nasopalatine neurovascular bundle has been separated for better exposure.
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Xin Wei, DDS, PhD, MS 1st edition 02/03/2013, last revision 01/21/2019