Article 1 Complex canal system 1 Missed anatomy 1 Second mandibular premolar 1 Two roots Uncommon anatomies 1 adult 1 anatomical variation 1 buccal mucosa 1 case report 1 clinical article 1 clinical examination 1 dental prophylaxis 1 dental restoration 1 edetic acid 1 human 1 hypochlorite sodium 1 kerr pulp canal sealer 1 male 1 mandibular second premolar 1 percussion 1 restorative dentistry 1 retreatment 1 root canal filling material 1 root canal obturation 1 thermafil 25 1 tongue 1 tooth radiography 1 tooth root canal 1 zinc oxide eugenol 1