Increasing Use of Bioceramics in Endodontics: A Narrative Review

Abstract:

Successful outcomes of root canal treatment, in addition to a multitude of factors, also depends on the prevention of reinfection of the root canal space. The ultimate goal of root canal treatment is prevention or healing of apical periodontitis. The use of biologically active materials to seal root canal systems has been extensively proposed in contemporary endodontics to realise this goal. There are several commercial formulations of bioceramics available based on minor variations in composition which could have potentially important changes in properties in the clinical situation. This narrative review serves to provide brief information on the different formulations of bioactive ceramics that are available to a dentist.

METHODOLOGY:
Gray MTA Plus/ MTA Plus is a powder and liquid/ gel system. The powder consists of fine inorganic substance similar to that of ProRoot MTA. Liquid or gel may be used for cavity liner/base, pulp capping, pulpotomy, root apexification,resorption/perforation repair or root-end filling material. The water-based gel (with water soluble thickening agents and polymer) imparts washout resistance and faster setting, which the liquid does not. The manufacturer recommends mixing the powder with gel into a syrupy, stringy consistency when used as a root canal sealer during obturation. NeoMTA Plus is a powder-gel system. The powder components are an extremely fine powder primarily tricalcium and dicalcium silicate, quite similar to that of white ProRoot MTA, but contains no bismuth oxide in order to prevent tooth staining. Tantalum oxide is used as the radiopacifier.

RESULTS:
The manufacturer claims that this material achieves washout resistance in less than three minutes (MTA Plus is about five minutes), thus allowing continuation of the restorative procedure. Also it has a 20-minute working time and a 50-minute setting time when mixing to a putty consistency. Thus, the setting time of both MTA Plus and NeoMTA Plus are depending on the consistency of the mixed material. The setting time of MTA Plus was found retarded when in contact with fluids; about 128 minutes in dry condition and about 1,052 minutes in contact with physiological solution. While the hydration of the core material was not affected by contact with the different solutions but the periphery exhibited microcracking, leaching of calcium hydroxide, partial decalcification of calcium silicate hydrate, and interaction with a physiological solution resulted in inhibition of hydration.The compressive strength was significantly lower when MTA Plus mixed with liquid was exposed to the biological fluid compared with saline. However the material mixed with gel was not affected in this condition.

CONCLUSIONS:
Although there has been increasing use of the bioceramic products, i.e. cements and sealers, in endodontics since the introduction of MTA and evident proof of its clinical outcomes, further studies are still required in the area of root canal sealer.
Oralhealth. 2018 May, 81(3):1705-28.
Jeffrey Wen, Wei Chang, Chonrada Praisarnti, Prasanna Neelakantan
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NeoMTA Plus is a stainproof, tricalcium silicate-based bioactive cement that can be used universally for vital pulp and other endodontic indications in primary and permanent teeth. NeoMTA Plus is a bioceramic cement that triggers the healing process. With NeoMTA Plus, general dentists, pediatric dentists, and endodontists now have a superior and reasonably priced bioceramic. Dentists praise the multi-use NeoMTA Plus because it mixes more smoothly, is easier to dispense and the unique gel enables more stable placement, washout resistance and faster clinical setting.

New, stain-free light color:

Ideal for pediatric dentistry—won’t discolor teeth
Liquids such as sodium hypochlorite won’t cause discoloration

Multiple indications:

Pulp-capping to base/liner
Pulpotomies to apexification
Sealer to perforation repair
Root-end filling to resorption

Non-cytotoxic

Inhibits bacterial growth* *Tested in vitro. Not a disinfectant

Grey MTA Plus is a bioceramic tricalcium silicate-based Dental Cement, which is slightly more radiopaque than (white) MTA. The light silvery color of MTA Plus is visible during placement. Grey MTA Plus is indicated for both Vital Pulp Therapy and Endodontic procedures. General dentists and endodontists praise the multi-use Grey MTA Plus because it mixes more smoothly and is easier to dispense. The unique gel enables more stable placement, washout resistance and faster clinical setting.

Multiple indications:

Pulp-capping to Base/Liner
Pulpotomies to Apexification
Sealer to Perforation Repair
Root-end Filling to Resorption

New, light grey color:

More radiopaque than the leading white MTAs
Visible for precise placement
Inhibits bacterial growth in vitro of Staphylococcus aureus, Escherichia coli, Enterococcus faecalis, Pseudomonas aeruginosa.
Non-cytotoxic

Better mixing, handling and placement:

Finer powder mixes more easily and smoothly
Dispense as little as 0.1 gm
Unique gel for stable placement
Washout resistant
No special equipment required

Smart, convenient packaging:

Protects fine powder in desiccant-lined bottle
Easy to dispense powder as needed
Dropper-tip gel bottle minimizes waste