Allergies to Composite Fillings

While there is less sensitivity to composite fillings than the old amalgam ones, patients with allergies must be very cautious.

It is better to err on the side of caution and a screening test for allergies should be performed.

Screening Tests

In order to pinpoint sensitivities to various materials, The Clifford Materials Reactivity Testing (CMRT) was devised.  This is a blood screening technique in the laboratory for the purpose of identifying existing allergies to different chemicals and groups of compounds in a patient.

The CMRT has been added routinely to the Dental panel practice.  Test results are assembled into a single chart and upon review, the skilled dentist can make the decision as to which fillings would be most appropriate and least likely to cause a reaction in an individual.

There is no need to fast or avoid certain foods in the diet prior to having blood drawn for the CMRT. Antibiotics and the majority of medications will also not affect the screening test.

There are more than 11,000 branded dental products and almost 100 chemical compound groups used in dental products that are routinely tested in the Clifford Materials Reactivity Test. The personalized results supply the complete data necessary in selecting the type of restorative materials for each patient.

Sensitivities can change over the course of time.  Yet the CMRT is accurate for 1.5 to 2 years and is accurate in 95% of the tests done.

Anesthesia is not tested in the test however.  If sedation or topical medication is going to be applied, this must be discussed with the patient and a careful history of allergies taken.

Hormone Release

In chemical composition studies, it has been found that a small amount of estrogenic chemicals are released from composite fillings (probably from the sealant used). This can create allergic and health concerns.  However, the amount of these chemicals released, rapidly decreases after the initial few days.

Due to the nature of the hormones released, it would be prudent for pregnant or breast-feeding women to postpone the placement of composite fillings into their teeth until the delivery or such time as the lactation is finished.

While allergic reactions can occur to almost any chemical compound one is exposed to, the toxicity from mercury and amalgams is still viewed as a greater threat than the composite fillings.  Also, depending on the test results, the resin can be applied with a different sealant.