| Properties of dentino-pulp protective funds INTRODUCTION: Different dental cements are used for coronal fillings, root canal fillings or even prosthesis sealing. The choice of the cement(s) is made according to the clinical case and their physicochemical properties. Protective funds are biomaterials compatible with the living organism which is the pulp. | |
| Biological properties “biocompatibility”: |
They constitute the essential part of what is required of a protective fund. There are six of them:
– – perfect solubility in water and tissue fluids;
– – alkaline pH closest to that of the living tissues in contact (the pH of a healthy pulp is 7.4);
– – non-toxicity and non-allergenic tendency;
– – no irritation of other dental and periodontal tissues;
– – safety for the oral mucosa;
– – high efficiency, even at low concentration.
| anti-inflammatory properties: |
They complement the previous ones in the search for the restoration of normal condition of the pulp tissue; anti-inflammatory, but also anti-infectious.
The protective base must:
– – have a lasting anti-infectious action, however weak it may be;
– – prevent any putrefaction.
It was based on these requirements that it was considered appropriate to add antiseptics, antibiotics and anti-inflammatories to the materials.
| physicochemical properties: |
– – No staining of teeth.
– – No unpleasant odor or taste.
– – Adhesion to the dentin surface.
– – Sufficient mechanical resistance to the pressure of the sealing material.
– – Compatibility with restorative materials.
| Technical qualities: |
– – Good conservation of the preparation.
– – Ease of introduction.
A perfect product, but impossible to preserve or too delicate to handle, would quickly be abandoned.
One last quality would be desirable: radiopacity; no protective background comes close to this ideal,
CONCLUSION :
The protective funds have the role of preserving the potential of dentino-pulpal healing and preventing any aggression of the pulp by the restorative materials. The choice of the material(s) can only be made by using the physicochemical characteristics of each product. In summary, the biological quality, the potential for isolation, the mechanical particularity of the materials, the possibility of reinforcing the residual tissue structures by adhesion are the main factors of clinical choice.
Properties of dentino-pulpal protective funds
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