Numbness and Nerve Injuries after Implant Placement?

Last Updated October 29, 2019

I placed 4 implants in a fully edentulous mandibular arch in sites 46, 43, 33, 36 on 18 oct 2019. During the implant osteotomy at site 36, there likely was less dense bone surrounding the superior roof of the IAN canal. The implant sank in 3mm subcrestal. The next day post op I called patient for review and was informed about numbness and heaviness on lower left lip and chin, limited to extraoral region only.

Around 28 hours post op from the first surgery, I removed the Nobel Active fixture 4.3x 10mm RP and replaced with Nobel Active 5mm x 8.5mm RP with GBR. 6 hours post op I also prescribed prednisolone, Neurobion and ibuprofen for the patient after the nerve injury. After the second surgery, I called the patient for post op review. Patient told me that she can feel the lower left lip almost completely now. But still feeling numbness and heaviness on lower left chin. What do you think of the chance of nerve injuries and usually how long it takes for recovery?

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