Patient SA, a 20-year-old man with multiple ageneses. (a) Among other implants, two 3.3-mm diameter implants were placed on each side of the symphysis. (b) After 2 weeks, the site became painful and, radiographically, a 10-mm lacuna had appeared. The patient was placed on antibiotics and the symptoms disappeared. (c) After 5 months, the site had remineralized