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The implant is unstable 4.5 months postop with seemingly excessive bone-implant gap (Fig.10 <). The 5.5x9 mm implant is removed. A 5x17 mm tap is used to change the trajectory and sinus lift, followed by 6x17 one (Fig.11). Finally a 6x14 mm tissue-level implant is placed with insertion torque > 50 Ncm (Fig.12; vs. <20 Ncm (Fig.7,10)) and improved trajectory. An immediate provisional is fabricated to prevent the mesial drifting of the tooth #15. By using the taps and placing the larger and longer implant, the sinus lift is more obvious (compare Fig.10 and 12 (*)).
Xin Wei, DDS, PhD, MS 1st edition 03/16/2017, last revision 03/16/2017