A 71-year-old woman has taken oral alendronate 70 mg weekly for 6 years for osteoporosis and has also taken prednisolone 5 mg daily for rheumatoid arthritis for 3 years. She has type 2 diabetes controlled with metformin; BP 134/80 mmHg. Her mandibular right first molar is non-restorable with a vertical root fracture and needs extraction. She has never had head and neck radiotherapy. Ten weeks after extraction, a CBCT is taken of the area of exposed, painful bone in the right mandibular molar socket. Which radiographic appearance is most typical of this complication?