Editing Dental Biomaterials

{{Short description|Synthetic and natural materials used in oral healthcare}}
__TOC__

== Definition ==
'''Dental Biomaterials''' is a multidisciplinary field that combines [[Materials Science]] with clinical dentistry. These materials are engineered to replace missing tooth structure or supporting tissues while maintaining a harmonious relationship with the biological environment of the oral cavity.

== Classification by Material Type ==

=== 1. Dental Ceramics ===
Ceramics are inorganic, non-metallic solids. They are favored for their excellent aesthetics and biocompatibility.
* '''[[Zirconia]]:''' Often called "ceramic steel" due to its high fracture toughness. Used for crowns and implant abutments.
* '''Glass-Ceramics:''' Such as Lithium Disilicate (E.max), which provides superior translucency for anterior restorations.

=== 2. Metallic Materials ===
Metals are used primarily for their strength and ductility.
* '''[[Titanium]]:''' The gold standard for [[Dental Implants]] due to its ability to undergo [[Osseointegration]].
* '''Noble Alloys:''' Gold, Platinum, and Palladium alloys remain the most durable materials for posterior restorations (inlays/onlays).

=== 3. Polymeric Materials ===
Polymers are long-chain molecules used in various dental applications:
* '''Acrylic Resins:''' Used for the base of removable dentures.
* '''Thermoplastics:''' Used for the production of [[Orthodontic Aligners]].

=== 4. Composite Resins ===
A "composite" combines two or more different materials to achieve properties that neither could achieve alone. 
* '''Matrix:''' Usually a resin like Bis-GMA.
* '''Filler:''' Glass or silica particles that provide strength and reduce shrinkage.
* '''Coupling Agent:''' Silane, which bonds the filler to the matrix.

== Biological Requirements ==
For a material to be considered a "biomaterial" in dentistry, it must pass several safety tests:
# '''Acute Toxicity:''' Must not release harmful substances.
# '''Hypersensitivity:''' Must have a low potential for causing allergic reactions (e.g., concerns regarding Nickel).
# '''Pulp Compatibility:''' Materials used in deep cavities must not irritate the dental pulp.

== Future Trends: Bioactive Materials ==
The next generation of biomaterials is shifting from "passive" (inert) to "active."
* '''Remineralizing Materials:''' Releasing fluoride, calcium, or phosphate ions to heal early [[Dental Caries|caries]].
* '''Scaffold Materials:''' Used in tissue engineering to regrow pulp or bone.

== See Also ==
* [[Adhesive Dentistry]]
* [[Restorative Dentistry]]
* [[Zirconia]]

[[Category:Dental Biomaterials]]
[[Category:Materials Science]]