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A 4.5x9(1) mm Magicore is placed with 35 Ncm (insertion torque) after 4.3 mm Magic Drill; a 4.5 mm healing abutment is inserted (Fig.7 H). An error occurs because of using 1 mm cuff of the Magicore. Ideally 3 or 4 mm cuff should have been used because of reduction in the ridge by ~ 3 mm (Fig.2). The result of the error is failure of placing the implant at the desirable depth (<9 mm). The coronal threads are exposed and have to be covered by bone graft (autogenous bone and allograft (.5-1.5 mm) (Fig.8 *), followed by collagen dressing.
Splinted provisional is fabricated #30 and 31 one month postop. The patient returns for final restoration (single units) nearly 4 months postop (Fig.11). Since the margin is subgingival, please fabricate a screw type crown for #30.
PA is taken immediately post tightening and cementation (Fig.14, 5 months postop). It appears that new bone has grown between the most coronal threads (arrows).
Xin Wei, DDS, PhD, MS 1st edition 11/01/2016, last revision 10/15/2018