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For
over 2,500 years, gold has been the restorative material of choice for
dentistry. Even in today's competitive crown and bridge marketplace, where
dentists can select from a wide range of alloys, amalgams, composites
and ceramic materials, more practitioners are using high gold (greater
than 65%) content alloys. Dentists and their patients have found that
dental restorations that use high gold materials can last a patient's
lifetime - from 20 to 50 years. Biocompatibility
Biocompatibility has always been an important reason for gold's use in
dental restorations. The safety of gold has been scrutinized for centuries.
According to many clinical studies, gold's biocompatibility with the soft
tissue of the oral cavity is unsurpassed. In addition, high gold content
alloys are typically not prone to oxidation, staining or plaque accumulation
- all impacting favorably on gingival health. Performance
Gold outperforms many alternative restorative materials. While other materials
are harder than gold and may cause abrasion damage, gold's wearability
is compatible with opposing teeth. Gold is malleable and flexes much like
natural dentition to adapt to occlusal pressures.1 Gold also provides
fine, smooth margins that resist microleakage, thus significantly reducing
recurrent decay. High gold content alloys offer casting accuracy, easy
definition of anatomy and excellent polishability.2 Value
The long-term durability of high gold content alloys makes them an excellent
value for the patient. Restorations using high gold content alloys can
last up to four times longer than alternative restorative materials. A
recent study found that selected cast and compacted gold restorations
lasted a mean average of 18.5 years, with a range of 5 to 41 years before
needing replacement.3 Thanks to its purity and smoothness, gold maintains
its esthetics. For anterior restorations, such as a coping under a crown,
gold reflects the natural esthetics of original tooth structure. When
looking for superior quality and long-term value, gold is the better choice.
1Wataha,
J.C., Craig, R.G., Hanks, C.T., The Effects of Cleaning on the Kinetics
of In Vitro Metal Release from
Dental Casting Alloys, Journal Of Dental Research, pp. 1417-1422, July
1992.
2Medina, J.E., Bridgeman, R.C., Frazier, K.B., Compacted
Gold Restorations, Clinical Dentistry,
Vol. 4, Chap. 25, pp. 1- 30.
3Medina, J.E., Mjör, I.A., Reasons for Placement, Replacement,
and Age of Gold Restorations in Selected Practices,
Operative Dentistry, Vol. 18, No. 3, May-June 1993.
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