How to apply BIOCERAMIC SEALERS Dr Mostafa Anwar

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Bioceramics are materials which include Alumina, Zirconia, Bioactive glass, Glass ceramics, Hydroxyapatite, resorbable Calcium phosphates. • Used in dentistry for • Filling up bony defects • Root repair materials • Apical fill materials • Aids in regeneration etc. • Bioinert: non-interactive with biological systems (Alumina, zirconia) • Bioactive: durable tissues that can undergo interfacial interactions with surrounding tissue (bioactive glasses, bioactive glass ceramics, hydroxyapatite, calcium silicates) • Biodegradable: soluble or resorbable, eventually replaced or incorporated into tissue (Tricalcium phosphate, Bioactive glasses). • for more : • • How to Apply BioCeramic Sealer Easily... • ---------------------------------------------------------------------------- • video content: • 1- single cone obturation technique • 2- what is bioceramic sealers ? • 3- advantages of bioceramic sealers • 4- Bonding of bioceramic sealers • 5- characteristics of bioceramic sealers • 6- examples of bioceramic sealers • ---------------------------------------------------------------------- • Bioceramic-Based Root Canal Sealers • The main functions of root canal sealers are to seal off the • voids, form a bond between the core of the filling material • and the root canal wall, and act as a lubricant. Sealers have • been classified according to chemical composition as zinc • oxide eugenol, calcium hydroxide, glass ionomer, silicone, • resin, and bioceramic-based sealers. • MTA-based sealers (Figs. 35.8A to F) • MTA as sealer • ProRoot Endo Sealer • Fillapex • CPM sealer • MTA Obtura • MTAS experimental sealer • F-doped MTA cements. • Properties • Biocompatibility • Bioceramic-based root canal sealers are biocompatible • which is mainly due to the presence of calcium phosphate • in the sealer. • Flow • Flow of a sealer allows it to fill canals, isthmus, accessory • canals, and voids between the master and accessory cones. • According to ISO 6786/2001, a root canal sealer should have • a flow rate of not 20 mm. Bioceramic-based sealers meet • the ISO requirements of flow. • Retreatability • Bioceramic sealers are difficult to remove from the root • canals during retreatment and post-space preparation. • Solubility • iRoot SP and MTA-Fillapex are highly soluble and do • not meet ANSI/ADA requirements. MTA-Angelus has • low solubility which is consistent with ANSI/ADA • requirements • • Radiopacity • Bioceramic sealers are radiopaque due to presence of bismuth trioxide and barium sulfate. • Antimicrobial Properties • Bioceramic sealers are antimicrobial in nature due to their • alkalinity and release of calcium ions which stimulates • repair by the deposition of mineralized tissue. • Adhesion • Sealing ability of bioceramic-based sealers is because of • following three mechanisms: • 1. Diffusion of the sealer particles into the dentinal • tubules and form mechanical interlocking bonds • 2. Infiltration of sealer’s mineral content into intertubular • dentin forming mineral infiltration zone, produced • after denaturing the collagen fibers with a strong alkaline sealer • 3. Reaction of phosphate with calcium silicate hydrogel • and calcium hydroxide, produced by reaction of calcium silicates in the presence of dentin’s moisture, • resulting in the formation of hydroxyapatite along the • mineral infiltration zone. • Conclusion • When compared to conventional materials used in • endodontic treatments, bioceramic cements are not • only biocompatible but also bioactive as they proved to • be involved in controlling the tissue healing and pulp • regeneration. Seeing the advantages of bioceramics, • recent studies favor bioceramic materials even if not many • products are available for use. Being biocompatible and • bioactive materials, these are used in root perforations, • large apical foramens, and root resorptions. MTA or • MTA-like cements have been used as materials of choice • in regenerative endodontics, vital pulp therapy, and periradicular surgery due to their clinical success rate. Based • on in-progress technology of fabrication, it is expected • that the newer bioceramic cements will overcome drawbacks of previous ones, mainly the discoloration problem. • With further research, bioceramics has the potential to • become the preferred materials for the various endodontic procedures. • Questions • Write short notes on: • MTA • Advantages of bioceramics in endodontics • Biodentine • Bioceramic sealers • Clinical applications of MTA

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