How to manage a lingual concavity perforation?

I was performing an osteotomy on a lower left second molar. The patient had very limited mouth opening so performing the osteotomy was difficult. I ended up perforating the lingual cortical plate. I placed the implant but didnt realize I had the lingual plate fenestration. There was good primary stability.No hematoma formation. Patient just feels sore. How would I manage this case? Access to graft the lingual concavity is quite challenging for this patient.