Oper Dent. 1996 Jan-Feb;21(1):36-41.
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.
Stopfgold: a new direct filling gold. • Lambert RL.
University of Colorado Health Sciences Center, School of Dentistry, Department of Restorative Dentistry, Denver 80262.
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.
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.
J Tenn Dent Assoc. 1997 Oct;77(4):36-40.
Preventive resin restorations vs. amalgam restorations: a threeyear 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). Seventyfour 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.