Bioactive dental materials

What are Bioactive dental materials?

Bioactive dental materials release compounds that help regenerate or maintain dental structures. In the past fluoride release was the only mineral that was in bioactive materials. Today we have materials that also release calcium and phosphate ions. Dentists use bioactive materials to remineralize dentin, repair bony defect, and maintain dental prosthetic margins

Another definition of bioactive dental materials

A bioactive dental material is something that forms a layer of hydroxyapatite or apatite like substance when immersed in saliva or a solution containing inorganic phosphate.  Bioactive refers to the materials ability to induce a response from a living cell.  It’s unclear if this definition excludes fluoride releasing dental materials, but I have fluoride releasing material on this page.

How do bioactive dental materials work?

Release of calcium from these materials, is what makes all of the non-flouride only bioactive materials work. This calcium works to help pulpal healing, promote immediate bonding and sealing, stimulate hydroxyl-apatite, and form secondary dentin. The material design often includes a biocompatible matrix material, bioactive molecules, or additive molecules and ions.

Classifications of bioactive dental materials

Primarily we have calcium silicates and calcium aluminates but the bioactive dental materials often contain some mixture of both. This only refers to the calcium releasing bioactive materials not the fluoride only materials.

• Calcium silicate materials similar to MTA (Portland cement)
• Calcium silicate with phosphate and without aluminum
• The calcium silicates with mostly tricalcium silicate
• Calcium aluminate
• Calcium aluminate and glass ionomer

 

Specific bioactive dental materials by trade name

Many of these materials are very similar. I am not including those materials in the table above.

• ACTIVA (Pulpdent) comes as both a filling and liner
• Beautifil  (ShofuDental) comes as restorative filling material
• BioCem  (NuSmile) this is the exact same as ACTIVA cement and I heard just repackaged for NuSmile.
• TheraCal LC (BISCO) is a dental liner

Why do dentists use bioactive materials?

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MTA mineral trioxide aggregate

MTA was the bioactive dental material that jump-started the interest in the field. It consists of portland cement 75%, bismuth oxide 20%, and gypsum 5% and trace amounts of silicon dioxide, calcium oxide, magnesium oxide, potassium sulfate, and sodium sulfate.  Portland cement is tricalcium aluminate, dicalcium silicate, tricalcium silicate, and tetracalcium aluminoferrite.  The removal of tetracalcium aluminoferrite removes the gray color and creates White MTA.

Information about some bioactive dental materials

TheraCal is in a new class of materials called resin-modified calcium silicate RMCS.

MTA Fillapex is resin base endodontic sealer and is similar to Fillapex MTA cement.

Biodentine by Septodent is a calcium silicate product. It is very similar to MTA with some improvements. Biodentine is made of tricalcium silicate, dicalcium silicate, calcium carbonate, calcium oxide, iron oxide, and zirconium dioxide as a radiopacifier. The liquid portion is calcium chloride and a polymer.

Activa Bioactive by Pulpdent is a bioactive cements that releases flouride, calcium and phosphate.  I have been told that BioCem by NuSmile is actually made by someone else and the only other product availabe is Activa so….

MTA research

MTA beats biodentine in furcation perforation repair. Assed Bezerra Silva JOE 2017

Ceramir cement by Doxa

Ceramir is a hybrid material consisting of calcium aluminate and glass-ionomer components. It’s new and I’ve seen conflicting reports on whether or not it’s actually better in any way. Pameijer shows that micro-leakage of Ceramir is the same as Rely x luting plus in the short term. Ceramir does test higher than other cements for antibacterial properties. Unosson  Of course the main reason we have interest in Ceramir is due to it’s ability to remineralize at the margin. Alhuwayrini It is testing as acceptable retention.  Jefferies J Clin Dent 2009 Jefferies 3 year test

Bioactive dental liners

TheraCal LV by Bisco, Activa BioActive Base/Liner and Biodentine.

Giomer products

Giomer products have been around for a long time but Shofu’s new line of Beutifil products are nice and like all giomers release fluoride.

Bioactive dental material articles

Dental today article is very nice and so is this review article.

Other similar topics to bioactive dental materials

Bioceramic dental materials are under the umbrella of bioactive dental materials.

Bioceramic materials include alumina, zirconia, bioactive glass, hydroxyapatite, and resorbable calcium phosphates. They are chemically and dimentionally stable, biocompatible, and osteoconductive. Biocermic materials are non-corrosive, bioinert, bioactive, and biodegradable, soluble or resorbable.

Bioactive molecule delivery systems should be in own post since this is tissue engineering

Bioactive molecules are active signaling molecules that both initiate and maintain cellular responses. They are one of the basic principles of tissue engineering triad; those three being stem cells, scaffolds, and bioactive molecules. The challenges dentistry has in using bioactive molecules is that high concentrations can be toxic to cells, bioactive molecules have may have a short half-life, and maintaining a high enough concentration for the therapeutic time period.

Dentistry uses bone morphogenic protein BMP for bone grafting, well technically we use rh-BMP2.

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