The use of solvents for gutta‐percha dissolution/removal during endodontic retreatments: A scoping review

Abstract

This scoping review study aimed to map the evidence about solvents' use for gutta‐percha dissolution and removal during endodontic retreatments. The study protocol followed the Joanna Briggs Institute guidelines, available online (https://osf.io/5vy8n/). Reporting was based on PRISMA Extension for Scoping Reviews. We selected dentistry studies that considered the effectiveness of solvents in gutta‐percha dissolution in endodontic retreatments and compared their performance to the use of instrumentation techniques without solvents. The search and study screening were performed in PubMed and Scopus databases by two independent researchers. A descriptive analysis considered the study design, method/technique used for obturation, method/technique used for instrumentation during retreatment, solvent solutions tested, exposure time, and main findings. A total of 41 studies were included. Despite that, most studies suggested that solvents' use may complicate root canal cleanliness, regardless of the type of instrumentation used, and facilitate the presence of gutta‐percha remnants in the root surface. Thus, the use of solvents should be avoided and its use should only be considered if the previous working length was not possible to access without it. Despite that, high heterogeneity was observed, further studies are still encouraged comparing the performance and effects of different solvents in different clinical scenarios.

Retrievability of bioceramic-based sealers in comparison with epoxy resin-based sealer assessed using microcomputed tomography: A systematic review of laboratory-based studies

“…[ 20 ] Nonetheless, clinicians should be cautious with the use of solvents such as chloroform due to its toxicity and carcinogenic potential. [ 59 60 61 62 ] Furthermore, the use of solvents would create a thin layer of plasticized gutta-percha adhering to the root canal wall and its irregularities making the operatory time longer and retreatment procedure challenging. [ 63 64 ] Garrib and Camilleri[ 65 ] reported that a chemical adjunct (10% formic acid) along with mechanical instrumentation is efficient to retreat teeth obturated with gutta-percha and bioceramic sealer as it eliminated over 95% of root canal filling material as well as re-established apical patency and working length.…”

Obturation of Root Canals By Vertical Condensation of Gutta-Percha – Benefits and Pitfalls

“…Effective gutta-percha solvents include e.g. chloroform or eucalyptol (Dotto et al, 2021). It does not adhere to the dentin of the root system and, therefore, all filling techniques using gutta-percha cones require their combination with sealer material.…”

Natural Polymer Eucommia Ulmoides Rubber: A Novel Material

“…Many scientists failed to convert EUR into elastomer for a long time. 18,19 Therefore, to realize the transformation of EUR from plastic to elastic, it is the key to break through the barrier of the crystallization of EUR. Until 1980s, EUR elastomer was first fabricated using vulcanization technology by Yan, thus ending the history that EUR cannot be used as elastic rubber.…”

“…EUR is a crystalline polymer and serves as hard rubber with strong impact resistance performance at the ambient temperature, while NR needs low temperature (−25 °C) or stretch to induce the crystallization. Many scientists failed to convert EUR into elastomer for a long time. , Therefore, to realize the transformation of EUR from plastic to elastic, it is the key to break through the barrier of the crystallization of EUR. Until 1980s, EUR elastomer was first fabricated using vulcanization technology by Yan, thus ending the history that EUR cannot be used as elastic rubber .…”