My father-in-law is around 70 years old. He has generalized chronic periodontitis since around last 10 years. He complaints of severe pain in max right 3rd molar after accidental contact with mandibular teeth. Tooth has grade 1 mobility. Adjacent tooth is grossly decayed and has only a portion of cusp remaining. I haven't examined his mouth. He cannot undergo extraction due to his medical condition. He's on anticoagulants after angioplasty since last five years. The pain is sharp shooting in nature and lingers on several hours after onset. Please suggest me what would be best for him at the moment. I am a final year student of dentistry.