Case report: "C-SHAPED MANAGEMENT with THERMAFIL SYSTEM£

RiassuntoObiettiviL’anatomia del secondo molare mandibolare è altamente variabile. I canali C-Shaped rappresentano una sfida per il clinico nella sagomatura, detersione, ma soprattutto durante la fase di otturazione. Lo scopo del seguente lavoro è illustrare la versatilità del sistema Thermafil in questo tipo di anatomie canalari.Materiali e MetodiViene presentato un case series di 3 secondi molari mandibolari C-Shaped destinati altrattamento endodontico. Glide path e sagomatura sono stati eseguiti con PathFile e ProTaper fino ad F2. EDTA 10% e NaOCl 5% sono stati usati come irriganti. L’otturazione è stata eseguita con sistema Thermafil.Risultati e ConclusioniI controlli radiografici mostrano un’adeguata distribuzione della guttaperca ed un omogeneo sigillo apicale. A due anni i casi risultano asintomatici e si evidenzia la guarigione periradicolare. La tecnica presentata sembra facilitare la gestione della complessa anatomia canalare C-Shape.SummaryAimThe anatomy of mandibular second molar is highly variable. C-Shaped canals rapresent a challenge for the clinician in saping, cleaning, but mainly during obturation. The aim of this study is to illustrate the versatility of Thermafil System in such complex anatomy.Material and MethodsA case series of 3 C-shaped mandibular second scheduled for root canal treatment is presented. Glide path and shaping were performed with PathFile e ProTaper up to F2. EDTA 10% and NaOCl 5% solutions were utilised as irrigants. Obturation was accomplished with Thermafil system.Results and ConclusionRadiographic imaging showed an adequate distribution of thermoplasticised guttapercha with homogeneous apical seal. At 2 years follow up all cases appeared symptoms-free and showed periradicular health. The present technique appeared user-friendly and reliable in managing complex C-Shaped anatomy

Textural and mineralogical constitution of mineral trioxide aggregate: A comparison among different products

Objectives: To determine the mineralogical, chemical, and microtextural differences between commercially available MTA products, clarifying common differences with Portland and between each other. Materials and methods: The study was done on four commercially available MTA cements, that is Ogna Aureoseal®, Proroot white MTA®, Angelus white and gray MTA® and on a commercial Portland cement. After preliminary X-ray diffraction characterization of the powder, the samples were consolidated following the same procedure used in clinical practice. The consolidated material was embedded in epoxy and polished, and subsequently investigated, by means of SEM-EDS analysis of back-scattered electron images on all samples and of quantitative compositional mapping on MTA. Results: The MTA and Portland cements differ for the grain size, the hydration rate, and homogeneity of the set products, and for lower Fe and S content in MTA. Previously reported presence of opacizing agents (Bi2O3 and CaWO4) was confirmed in all samples, whereas low Al content was not observed in all MTA. Although the MTA products are all mainly composed by di-calcium and tri-calcium silicates, the post-setting texture and the chemical and mineralogical constitution differ. Finer texture was observed in Ogna Aureoseal® and Proroot white MTA®; in Ogna Aureoseal® the presence of apatite and Ca-tungstate was reported; Mg and Al content changed in samples, following the clinker composition. Conclusions: Significant differences exist between Portland cement and MTA, but also among different MTA formulations. MTA products can be classified as a form of Portland cement, specifically modified for dentistry purposes. © 2011 Società Italiana di Endodonzia. Published by Elsevier Srl. All rights reserved