Melbourne Smile Clinic

Are the materials you use bio-compatible?

Biocompatibility
All materials used in the dental setting have been approved by the Australian TGA (therapeutic goods administration)

Resin composites
Resin composites are commonly used routinely as a tooth-coloured filling material. There is concern from members of the public that they contain bisphenol A (BPA) which is thought to have oestrogenic effects on cells. The evidence comes from studies showing that BPA binds to oestrogen receptors in vitro. However, the oestrogenic effect of BPA is 1000-fold less potent than the native oestrogen hormone.

All current resin composites consist of methacrylate monomers (such as Bis-GMA) and DO NOT contain BPA. However, BPA is a synthetic chemical starting point from which all methacrylates are derived – in dentistry as well as many other plastics.

No evidence exists that dental composites have estrogenic effects in vitro or invivo.

Dental ceramics
Dental ceramics are very chemically inert materials and remain stable over very long periods of time. They therefore have excellent biocompatibility.

They furthermore exhibit excellent flexure strength, fracture toughness, wear resistance and colour stability. The ceramics can also be formed into precise shape to replace missing parts of a tooth.

They are an excellent material where a substantial part of a tooth is missing or for crowns.

However, in order to be held onto the tooth, the ceramic restoration has to be bonded to the tooth surface with a cement.  The cement in some cases has to be a resin cement in order to provide the best adhesion.  Resin cements have chemical similarities to resin composites which have been described above.

Reference: Phillips’ Science of Dental Materials, Kenneth J. Anusavice 2007.

Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.
Covid-19 update: Level 3 restrictions in Place
Only dental treatment deemed urgent can be provided and aerosol generating procedures are to be avoided. Patients will be asked to use a 0.2% chlorhexidine or 1.5% hydrogen peroxide mouthrinse prior to starting a procedure. Triage of patients will be carried out before an appointment is booked. Rubber dam for dental procedures will be used as much as possible.  Patients who have tested positive for Covid-19 or are awaiting test results, showing any symptom of covid-19 or have been in contact with an infected person are asked to delay dental visits. Social distancing measures have been set up in the waiting room as well as the staggering of appointments. Patients must use the alcohol-based handrub provided before and after treatment. For more information on restriction levels in Dental Practice, please click here . If you have a dental concern, please call us first to confirm whether the required treatment can be provided at this time. Thank you.