human 6 molar tooth tooth periapical disease 6 Humans 4 Molar 4 Article 3 Periapical Periodontitis 3 diagnostic imaging 3 male 3 root canal obturation 3 Female 2 Male 2 Maxilla 2 Oils, Volatile 2 Root Canal Obturation 2 Root Canal Preparation 2 X-Ray Microtomography 2 adult 2 alveolar bone 2 antiinfective agent 2 case report 2 clinical article 2 controlled study 2 dental caries 2 drug effect 2 essential oil 2 female 2 maxilla 2 micro-computed tomography 2 osteolysis 2