When a 4.5x20 mm tap (Fig.7 T) is inserted, the new bone gained is limited (red line).
It appears that when a 7x17 mm implant is placed (Fig.8), the bone contact is increased vertically (red line) as the diameter of the implant increases. ^: sinus floor; *: bone present apical to the implant.
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Xin Wei, DDS, PhD, MS 1st edition 07/02/2013, last revision 08/03/2019