Five months post #31 implant removal with bone graft, osteotomy is initiated for a 5x10 mm implant using an existing guide.  A question arises suddenly whether the bone height is reduced.  Therefore a 4.5x10 mm dummy implant is placed with a fixture anchor placed at #30 (Fig.1 A). 

Redo Last Next Xin Wei, DDS, PhD, MS 1st edition 09/18/2019, last revision 09/18/2019