When a 4x11 mm IBS implant and 5x4(2) mm pair abutment are placed, the distal thread is exposed (Fig.4 >), the abutment contacts the opposing tooth (data not shown) and there is 2.7 mm clearance from IAC.  Retrospectively a shorter implant should be placed to reduce the chance of distal thread exposure.

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Xin Wei, DDS, PhD, MS 1st edition 01/19/2017, last revision 01/01/2020