An unusual repair of perforating internal inflammatory root resorption; a case report of endodontic treatment

Internal inflammatory root resorption (IIRR) can occur as a serious complication of dental trauma which leads to progressive loss of the root structure. An early diagnosis could influence the therapeutic approach, but endodontic treatment becomes a challenge with a doubtful prognosis. The present report described an unusual clinical presentation of an IIRR with perforation resulting from a trauma four years previous. A 15-year-old female patient was presented to our service with pain in the maxillary incisor region. Intraoral radiography revealed a large radioloucent area compatible with IIRR, communicating with the periodontium in the middle third on the distal root face of the right central incisor. The root canal of the right central incisor was chemo-mechanically prepared. The calcium hydroxide (CH) intracanal medication was used and renewed periodically four times. The root canal was filled only in the cervical region to the level of resorption by the inverted gutta-percha cone technique. Clinically and radiographically, all follow-up examinations revealed an asymptomatic tooth, evidencing periapical tissue repair and new bone formation. The tooth remained asymptomatic 3 years afterwards. The present case report supports the idea of executing satisfactory intracanal decontamination by chemo-mechanical preparation, thus creating a favourable environment for tissue repair.

Fratura e tempo de uso de instrumentos rotatórios de NiTi no preparo / Fracture and time of use of rotary engine-drive NiTi endodontic instruments in the preparation of curved canals

Foi comparado o número de fraturas e tempo de uso de instrumentos rotatórios ProFile no preparo de canais curvos com duas técnicas de instrumentação. Foram utilizadas a técnica rotatória convencional e a associação das técnicas oscilatória e rotatória no preparo de canais mesiais de molares inferiores com média de grau de curvatura de 28,82°. Apesar de não apresentar diferença estatística, os resultados mostraram que a técnica rotatória fraturou ou distorceu o dobro de instrumentos em relação à combinação das técnicas oscilatória e rotatória e com diferença significante, no tempo de uso dos instrumentos ProFile