Canal Aberration Assessment in Simulated Root Canals: a Comparative Study.

AIM: The aim of this study was to compare time of preparation and canal aberrations in a simulated root canals after using three different rotary systems: Endostar E5, Endostar E3 and T One File Gold. MATERIALS AND METHODS: A total of 90 endodontic training blocks were used in this study and divided into three groups consisting of 30 each (n = 30). Blocks processing was performed by thirty dentists without any prior experience in rotary instrumentation techniques. In the first group blocks were prepared using Endostar E5, in second one with Endostar E3 and in third one with T One File Gold system. The preparation time was measured. The postoperative image of each block was taken by stereomicroscope and canal aberrations (ledge and instrument fracture) was recorded. Statistical analysis was done by SPSS software. RESULTS: Instrumentation with T One File Gold system is significantly faster compared to instrumentation with Endostar E5 and Endostar E3 systems (p <0.05). There are no statistically significant differences in the type and number of procedural errors between Endostar E5, Endostar E3 and T One File Gold systems when the operators have no previous experience in rotary instrumentation techniques. CONCLUSION: Under the conditions of this study, the incidence of examined canal aberrations were similar for all tested systems. The preparation time was significantly shorter with single file system.

Endodontic treatment as non-surgical alternative in managing multiple periapical lesions / Tratamento endodôntico como alternativa não cirúrgica no monitoramento de uma lesão periapical múltipla

This paper presents non-surgical resolution of an extensive periapical lesion-like-cyst of endodontic origin associated with lower central incisors. Endodontic treatment was performed through full crowns, since patient had circular metal-ceramics bridges in lower jaw. This article is a case report of combined endodontic treatment of multiple periapical lesions at 29 years old male, followed by prosthodontic rehabilitation. Intraoral examination revealed a symptomatic, sore bony hard and soft tissue swelling, mainly confined in lower intercanine sector. Trepanation and apical patency obtained 2 ml of bloody serous exudates. After through biomechanical preparation, a calcium hydroxide/CPMC root canal dressing was applied and periodically renewed for 4 months. The exudates were almost eliminated at treatment onset and significant bone formation was observed at the periapical region in the following months. We can report unexpectedly good bone healing of a large periapical lesion-like- cyst in teeth 31 and 41, following non-surgical root canal treatment, as well as smaller lesions on teeth 34 and 43. After complete root canal treatment, patient was prosthetic rehabilitated additionally. Complete radiographic resolution of the periapical lesion was not observed six months after the root canal filling, but the lesion is obviously smaller. Thus, non-surgical treatment of this supposedly cystic, extensive periapical lesion provided favorable clinical and radiographic response.

Este trabalho apresenta uma resolução não cirúrgica de uma extensa lesão periapical como se fosse uma lesão cística, de origem endodôntica, relacionada com os incisivos centrais inferiores. O tratamento endodôntico foi executado através da coroa total em metalocerâmica.O paciente tinha uma ponte de metalocerâmica inferior. É um relato de caso que combina tratamento endodôntico de lesões múltiplas periapicais em um paciente masculino de 29 anos de idade, em sequência de uma reabilitação oral protética. O exame intraoral revelou uma lesão óssea e inflamação do tecido mole, confinada à região do intercanino inferior. Com trepanação e permeabilidade apical foram obtidos 2 ml de sangue e exudato seroso. Depois por meio de preparação biomecânica, o canal foi forrado com hidróxido de cálcio CPMC e foi aplicado CPMC periodicamente e renovado a cada 4 meses. O exudato foi quase todo eliminado no tratamento e uma neoformação óssea foi observada na região periapical nos meses seguintes. Foi observada boa reparação óssea de uma grande lesão de aparência cística nos dentes 31 e 41 e seguido de tratamento de canal radicular não cirúrgico, bem como em pequenas lesões nos dentes 34 e 43. Após completar o tratamento do canal radicular, o paciente teve, além disso, a reabilitação protética. A resolução radiográfica completa da lesão periapical não foi observada 6 meses após a restauração do canal radicular, mas a lesão tornou-se menor. Assim sendo, o tratamento não cirúrgico deste suposto cisto com extensa lesão periapical, proporcionou uma resposta clínica e radiográfica favorável.