This was a 15 year old girl with a large peri-apical lesion in relation to the the left mandibular first molar. The tooth had a guarded restorative prognosis. The goal of endo in this case was to hold the tooth for a longer period before placing implants and also get some bone to fill in which would make implant placement more viable. I held the tooth with calcium hydroxide dressing for 5 months, saw some bone-fill and obturated the tooth. A crown was also placed. 3-year recall shows the tooth still going strong.