Analysis of the film thickness of a root canal sealer following three obturation techniques

Abstract

The aim of this study was to obtain a quantitative analysis of the film thickness of a root canal sealer formed after filling by three different techniques. Thirty human maxillary incisors were selected and access cavities were prepared using high-speed diamond stones and water spray. A size #15 K-Flexofile was introduced in the canal of each specimen until it was seen just at the apical foramen. The working length was determined to be 1 mm short of that position and the canals were prepared to an apical size of #45 K-Flexofile. Copious irrigation with 5.25% NaOCl (sodium hypochlorite) was used during and after instrumentation. The samples were divided into three groups and obturated as follows: G1 - lateral condensation, G2 - lateral condensation with an accessory cone, and G3 - continuous wave of condensation. The samples were evaluated in the cervical, middle and apical thirds. The film thickness of the root canal sealer was measured through a microscopic evaluation. Statistical analysis was obtained using the Wilcox test. Statistical analysis showed significant differences between G3 and G1, G3 and G2 (p < 0.05). In general, the lowest film thickness was observed in the continuous wave of condensation (G3). Lateral condensation with an accessory cone (G2) and lateral condensation (G1) demonstrated poorer results in this study, showing a higher film thickness. The small film thickness of the sealer obtained by the continuous wave of condensation technique may increase the clinical performance of this technique.

Niobium pentoxide as a new filler for methacrylate‐based root canal sealers

“…These results represent an important physical property of experimental root canal sealer, because the ability to create a thin film of sealer could promote a better seal (de Deus et al . ). Although the group containing 120 wt% of Nb 2 O 5 had flow values that were not in accordance with ISO 6876 (Standardization ), a commercially available and widely used resin‐based root canal sealer has lower values than established by standardization (Almeida et al .…”

Interfacial adaptation and thickness of bioceramic-based root canal sealers

“…It was previously reported that a hermetic seal was formed inside the root canal when single cone technique was used with EndoSequence BC 19) . Different methods have been used to assess sealer thickness: grid system 8) , linear measurement to the area with higher film thickness 25) , and quantification of area percentage occupied by sealer 26) . In the current study, percentage of area occupied by sealer was used as it is reliable and applicable.…”

Evaluation of epoxy resin sealer after three root canal filling techniques by confocal laser scanning microscopy

“…Resin‐based sealers present suitable physic‐chemical properties, such as appropriated setting time, flow, low viscosity, radiopacity >3 mm of aluminum, appropriate particle size and pH, and low superficial tension (Martin‐Bauza et al,2010). Sealer layer should be thin, homogeneous, and continuous to achieve great sealing ability (De Deus et al,2003). The sealer layer thickness is important for the treatment success, especially when it appears in thick layers, damaging the sealing capacity of the filling system (Bamiduro et al,1992).…”