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1. Oper Dent. 1996 Jan-Feb;21(1):36-41. Links
E-Z Gold: the new Goldent.
• Alperstein KS,
• Yearwood L,
• Boston D.
Temple University School of Dentistry, Department of Operative
Dentistry, Philadelphia, PA 19140, USA.
E-Z Gold is a new direct filling gold material that is similar to
existing powdered gold formulations but more user-friendly. It is a
mixture of pure gold powder and wax (less than 0.01% organic
wax), wrapped in gold foil introduced to the dental profession in
the late 1980s, and similar metallurgically to gold foil and
powdered gold (Goldent) in that, when properly and thoroughly
compacted, it has comparable properties: inertness
(biocompatibility) and permanence. E-Z Gold's manipulative
characteristics are similar to that of a very stiff amalgam, yet
more sticky (cohesive) than gold foil, hence the name E-Z Gold.
There is no reported research related to physical properties
regarding shear, tensile, and cohesive strength. One can assume
that E-Z Gold is similar to old Goldent but with improved softness
and working characteristics. Clinical experience in the use of this
new restorative direct filling gold material has been encouraging.
We anticipate that in the near future, clinical and laboratory
research comparing this gold to other types of direct filling golds
will be forthcoming.
Oper Dent. 1994 Jan-Feb;19(1):16-9. Links
Stopfgold: a new direct filling gold.
• Lambert RL.
University of Colorado Health Sciences Center, School of Dentistry,
Department of Restorative Dentistry, Denver 80262.

2. A new direct gold material that is considerably different from other
direct golds has been available since 1989. The advantages of this
material are that the final restoration exhibits greater density than
other forms of granular gold and has a 50% increase in shear
strength when compared to gold foil. Clinical experience with the
use of this new restorative material has been encouraging. Further
clinical and laboratory research comparing this material with the
other types of direct gold is anticipated.
Scand J Dent Res. 1993 Apr;101(2):78-83. Links
Human pulpal response to direct filling gold restorations.
• Johansson G,
• Bergman M,
• Anneroth G,
• Eskafi M.
Department of Dental Materials and Technology, Faculty of Odontology,
University of Umea, Sweden.
Class V cavities were prepared in 47 caries-free premolars
intended to be extracted for orthodontic reasons. A powdered gold
filling material, Goldent, which can be hand condensed, was used
for direct fillings. The following test groups were used: (A) cavity
preparation, no filling, (B) cavity filled with Goldent only, (C)
cavity lined with Tubulitec and filled with Goldent, (D) cavity with
Goldent filling, sealed with IRM, and (E) positive and negative
controls. The teeth were extracted after 1-200 days and the pulpal
response was histologically examined. The results revealed that
only in Group B, i.e. when the cavity was filled with Goldent, was
the risk of a pulpal reaction obvious, although the material per se
(Group D) did not influence the pulpal tissue to any serious
degree. Probably the Goldent material cannot provide a marginal
seal tight enough to prevent microleakage, allowing
microorganisms to give rise to pulp damage and inflammation. In
those cases where the cavity had been isolated with Tubulitec liner
before the gold restoration was made, the pulp was effectively
protected from damage caused by microorganisms.

3. J Tenn Dent Assoc. 1997 Oct;77(4):36-40. Links
Preventive resin restorations vs. amalgam restorations: a three-
year clinical study.
• Cloyd S,
• Gilpatrick RO,
• Moore D.
Department of General Dentistry, U.T., Memphis, USA.
A three-year clinical study was completed at the College of
Dentistry comparing the overall performance of Class I amalgam
restorations with preventive resin restorations (PRRs). Seventy-
four PRRs and fifty-two amalgam restorations were placed in the
posterior teeth of thirty-eight patients. The PRR was composed of
two materials: P-50 (3M Corp.), a heavily filled composite resin,
and White Sealant (3M Corp.), a light-cured sealant. Fast-set
Dispersalloy (Johnson and Johnson Corp.) was used for the
amalgam restorations. The restorations were evaluated at six
months, one year, two years and three years. The USPHS/Ryge
system was used to evaluate anatomic form, marginal adaptation,
marginal discoloration and recurrent caries of both type
restorations. A restoration was considered a failure if any part of
the restoration was replaced due to secondary caries. There were
two failures of PRRs at six months, and four failures at one year.
Failures were due to non retention of the sealant of the PRR and
possibly related to operator error. The failures were easily repaired
and removed from the study. No PRR failed at the two or three
year evaluations. No amalgam restoration failed within the three
year period.