Phocal Fo

Phocal: easy interproximal therapy

July 19, 2013
A new product exhibited at this week’s RDH UOR is Phocal from Colldent. Maria Perno Goldie, RDH, MS, provides details about the fluoride disks that are designed to decrease interproximal decay.
A new product can been seen at the 2013 RDH Under One Roof (UOR), and it is a product called Phocal, by Colldent, which are fluoride disks designed to decrease interproximal decay. Colldent’s new Phocal product gives oral health professionals an easy and effective alternative to address incipient interproximal tooth decay. The thin, round Phocal disks can be easily inserted between the teeth to deliver a concentrated, site-specific fluoride treatment when incipient interproximal caries is probable or detected. They deliver the necessary fluoride to prevent decay, arrest the progress of incipient lesions, and enhance remineralization at natural interproximal tooth sites and at tooth-restoration margins between teeth.
Phocal fluoride disks are designed to: Offer improved access to hard-to-reach interproximal sites; provide an immediate therapeutic alternative to the “wait-and-see” approach; avoid the eventual need to excavate and remove interproximal decay; deliver a low, but concentrated and effective dosage of fluoride directly to the affected tooth surfaces for approximately 10 minutes before biodegrading; and create nanoscopic pH-sensitive fluoride reservoirs which remain active for 2-3 months at the enamel interproximal surface.
There is a video on the website.(1) There is also an insertion guide(2) and instructions for use.(3) Phocal topical fluoride disks are provided in two forms: pink acidulated phosphate fluoride Apf disks and yellow non-acidic sodium fluoride pHn disks. These thin, round disks contain 1.23% fluoride ions. Once positioned interproximally, they rapidly expand, soften into a gel and release fluoride for approximately 10 minutes before biodegrading. This release period can be increased as explained in the Directions for Use.(3)

Each Phocal Apf disk contains 0.103 mg of sodium fluoride and 0.009 mg of hydrogen fluoride in a matrix of FD&C red 3, gum arabic, gelatin (of marine origin), propolis wax, phosphoric acid, sodium benzoate and water. These disks induce an optimized low pH environment that cleans and etches tooth surfaces and facilitates fluoride penetration and stimulates remineralization.

Each Phocal pHn disk contains 0.122 mg of sodium fluoride in a matrix of gum arabic, gelatin (of marine origin), propolis wax, sodium benzoate and water. These disks are less acidic than the Phocal Apf disks and will not etch ceramic crowns or tooth-colored restorations while inducing fluoridation and remineralization.

There are warnings for the product, including (but not limited to) the following: in rare cases, sensitivity or adverse reactions may be experienced. In such cases immediately remove the disks while preventing swallowing and refer the patient to a physician; patients less than 12 years old and patients with special needs should remain under professional supervision until the Phocal disks have biodegraded or have been removed; the disks are not intended for systemic ingestion and should be kept out of children’s reach; if more than 20 disks are accidently swallowed, seek immediate medical assistance; Phocal should not be applied in sites with: gingival inflammation, immediately prior to or after oral soft tissue surgery and in cases of known allergies to any of the Phocal ingredients.(3) Phocal disks have been developed for use only by licensed professionals in the dental care setting.

An in vitro interproximal enamel fluoride uptake study was done on these fluoride delivery vehicles.(4) The conclusion of the study, which simulated interproximal sites, showed that the disks used with or without NaF varnish significantly enhanced enamel fluoride uptake. The clinical implications are that these disks, when used alone or with NaF varnish, have the potential to effectively deliver fluoride to interproximal carious lesions.(4)

For additional information, call the company or visit the website.(5,6)

4. Jodaikin A, Cooley WE, Lippert F, and Martinez-Mier EA. In Vitro Interproximal Enamel Fluoride Uptake as a Function of Fluoride Delivery Vehicles. Compendium Supplement – Colldent, May 2013, Volume 34, Issue 4.
5. 888-PHOCAL-3 (746-2253).

Maria Perno Goldie, RDH, MS

To read previous RDH eVillage FOCUS articles by Maria Perno Goldie, click here.

To read more about interproximal decay and dental hygiene, click here.