To reduce further exposure, the final/definitive implant remains 4.0 mm in diameter instead of 4.5 mm as designed, followed by sticky bone, particularly palatal (Fig.2,3 * (Ground Cortical Chips, .25-.85 mm)). 

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Xin Wei, DDS, PhD, MS 1st edition 05/14/2020, last revision 05/19/2020