title: Sealing ability of castor oil polymer as a root-end filling material.
abstract: The purpose of this study was to evaluate the sealing ability of castor oil polymer (COP), mineral trioxide aggregate (MTA) and glass ionomer cement (GIC) as root-end filling materials. Forty-five single-rooted human teeth were cleaned and prepared using a step-back technique. The apical third of each root was resected perpendicularly to the long axis direction. All teeth were obturated with gutta-percha and an endodontic sealer. After, a root-end cavity with 1.25-mm depth was prepared using a diamond bur. The specimens were randomly divided into three experimental groups (n=15), according to the root-end filling material used: G1) COP; G2) MTA; G3) GIC. The external surfaces of the specimens were covered with epoxy adhesive, except the root-end filling. The teeth were immersed in rhodamine B dye for 24 hours. Then, the roots were sectioned longitudinally and the linear dye penetration at the dentin/material interface was determined using a stereomicroscope. ANOVA and Tukey's tests were used to compare the three groups. The G1 group (COP) presented smaller dye penetration, statistically different than the G2 (MTA) and G3 (GIC) groups (p<0.05). No statistically significant difference in microleakage was observed between G2 and G3 groups (p>0.05). The results of this study indicate that the COP presented efficient sealing ability when used as a root-end filling material showing results significantly better than MTA and GIC.
authors.affiliation: Dental School of São José dos Campos, São Paulo State University, São José dos Campos, SP, Brazil.
authors.forename: Giovana Ribeiro
authors.initials: GR
authors.lastname: de Martins
authors.forename: Claudio Antonio Talge
authors.initials: CA
authors.lastname: Carvalho
authors.forename: Marcia Carneiro
authors.initials: MC
authors.lastname: Valera
authors.forename: Luciane Dias
authors.initials: LD
authors.lastname: de Oliveira
authors.forename: Leonardo
authors.initials: L
authors.lastname: Buso
authors.forename: Alessandra Sverberi
authors.initials: AS
authors.lastname: Carvalho
mesh_terms: D017607:Aluminum Compounds; D001704:Biopolymers; D017610:Calcium Compounds; D002368:Castor Oil; D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D004338:Drug Combinations; D005899:Glass Ionomer Cements; D006801:Humans; D010087:Oxides; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials; D017640:Silicates
chemical_list: D017607:Aluminum Compounds; D001704:Biopolymers; D017610:Calcium Compounds; D004338:Drug Combinations; D005899:Glass Ionomer Cements; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D002368:Castor Oil