Surgical Precision I

As a surgeon, I have never felt that my scalpel is as precise as media claims to be until guided surgery is introduced.  The implants at #14 and 19 are placed as precisely as planned as well as painlessly and quickly (Fig.1-4).  What else can we ask for?  The gingiva around the healing abutment (5.5x3 mm) at #19 is erythematous (Fig.5).  Later a longer healing abutment is used (Fig.6 (5.5x5 mm)).  There is no bone loss 5 months or 7 months postop (Fig.6-9).  The abutment screw is loose 3 months post cementation due to unfavorable crown/implant ratio.  Bicon implants will be in consideration to reduce screw loosening if implants are to be placed at #15 and 18.  The abutment screw at #14 becomes loose 10 months post cementation; after retorque at 30 Ncm, the abutment is incompletely seated (Fig.11).  It remains the same after use of 4.6 and 5.6 mm profile drills (Fig.12).  A healing abutment is placed.  When the patient returns, use planning kit and try to place a 5.2x5.5(2) cemented abutment.  In fact it works (Fig.13).

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Xin Wei, DDS, PhD, MS 1st edition 09/25/2018, last revision 02/24/2020