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Choose the widest bevel region to create a retention groove (using a carbide bur) in the abutment and into the implant bevel margin (Fig.6 white area and *). The inner surface of the future crown will have a retention slot, which will lock the abutment and the implant. Also prepare for parallelism (crown seating direction) and occlusal clearance (diamond bur). It is beneficial to ask the lab to make the smallest escape hole in the occlusal surface of the crown so that excess cement for the crown will not enter the gingival crevice.
Xin Wei, DDS, PhD, MS 1st edition 07/11/2020, last revision 07/11/2020