Traditionally, failing mandibular molars are extracted then allowed to heal before implant placement. Considerable loss of alveolus frequently accompanies this. Therapy is lengthy and multi-staged. We wanted to know if might be possible to speed the therapy and reduce the loss of alveolus by placing implants immediately following the extraction. Palabras clave: mandible, implants, sinus, CBCT, extractions, immediate placement, molar