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Eight months post socket preservation, the bone density at #2 feels low during osteotomy. The site is underprep not only in depth, but also in diameter (4.0x7.3 mm with 10.5 mm offset), but a 5x7.3 mm implant is ~ 1 mm shy of the purposed depth. Following 4.5x7.3 and 4.0x8.5 mm drills (without air leak), the implant reaches the depth, but with ~ 5 Ncm insertion torque (Fig.1). Placement of the same sized implant at #4 (healed site) is smooth with satisfactory stability (~30 Ncm, Fig.2,3).
Xin Wei, DDS, PhD, MS 1st edition 06/25/2019, last revision 06/25/2019