Gold Dental Restorations Research Articles

Gold restoration in modern Era: An overview

Aim: To find about the use of gold in modern day restoration and its advantages over other restorations. Objective: This literature reviews about the use of gold restorations in modern era. Background: Direct gold, or gold foil, is the oldest dental restorative material and continues to be used by many dentists today. There are several techniques for placing gold dental restorations, with the most common being cast gold, which is approximately 18 karats. Caste gold for restoration will prevent breakage and fracture when proper preparation is done and also does not flow and change shape. Gold restoration can also be finished to a very smooth surface. Reason: Gold has unique and amazing properties of resilience, malleability and biocompatibility. It is a tried and true method that has been used in dentistry for generations. This paper reviews the use of gold as a restorative material in modern era.

Prevalence of anemia in urban children attending a pediatric hospital of a metro city in south India

Aim: To find about the use of gold in modern day restoration and its advantages over other restorations. Objective: This literature reviews about the use of gold restorations in modern era. Background: Direct gold, or gold foil, is the oldest dental restorative material and continues to be used by many dentists today. There are several techniques for placing gold dental restorations, with the most common being cast gold, which is approximately 18 karats. Caste gold for restoration will prevent breakage and fracture when proper preparation is done and also does not flow and change shape. Gold restoration can also be finished to a very smooth surface.

Urinary platinum levels associated with dental gold alloys.

Platinum concentrations were determined in 50 urine and 20 saliva samples obtained from 50 subjects who had gold dental restorations. In addition, 42 urine and 35 saliva samples were collected from subjects who did not have gold dental restorations. Subjects with gold alloys had significantly (p < .001) higher urinary platinum excretion (mean = 11.9 +/- 8.5 ng/gm creatinine, range = 1.9-45.8 ng/gm creatinine) than controls (mean = 6.2 +/- 3.2 ng/gm, range = 1.9-14.4 ng/gm creatinine). Mean saliva concentrations were significantly higher in subjects with dental gold alloys (526 pg/gm vs. 8.5 pg/gm; p < .001). A laboratory test with 5 commercially available dental gold/platinum alloys showed that 0.1% sodium chloride mobilized platinum within 1 hr (i.e., 1-18 pg/ml) of its introduction. In conclusion, dental gold/platinum alloys appear to be the main source for urinary platinum excretion from the occupationally unexposed population.

Prevalence of Gold Sensitivity in Asymptomatic Individuals with Gold Dental Restorations

Background: The clinical relevance of positive patch test reactions to gold sodium thiosulfate in asymptomatic individuals with gold dental restorations is often unclear. Knowledge of the prevalence of gold sensitivity in individuals with and without gold dental restorations is required to better understand the relevance of these reactions. Objective: To determine the prevalence of positive patch test reactions to gold in asymptomatic individuals with gold dental restorations (goldpatients) compared with similar individuals without gold dental appliances (nongoldpatients). Methods: One hundred thirty-six healthy, asymptomatic patients were patch tested to gold sodium thiosulfate, nickel sulfate and palladium chloride. Readings occurred after 2 days and 7 days. Results: Of the patients tested, 24 of 71 (33.8%) gold patients had a positive reaction to gold versus 7 of 65 (10.8%) of the nongold patients,P < .001. Of those with a positive gold reaction, 12 of 31 (38.7%) also had a positive nickel reaction. Nickel alone was positive in 18 of 71 (25.4%) of gold patients versus 11 of 65 (16.9%) of nongold patients. 19 of 29 (65.5%) of those with a positive nickel reaction also reacted to palladium and 19 of 22 (86.4%) of those with a palladium reaction also reacted to nickel. The rate of allergy to gold computed over a 3-year period for patients patch tested in the Oregon Health Sciences University (OHSU) Contact Dermatitis Clinic was 13.5% (46/342). Conclusions: The prevalence of gold sensitivity in individuals with gold dental restorations is approximately 33.8%. This is significantly greater than the 10.8% prevalence seen in individuals without gold dental appliances, as well as greater than the 3-year rate from the OHSU Contact Dermatitis Clinic. This data should help shed light on issues of clinical relevance.

Prevalence of gold sensitivity in asymptomatic individuals with gold dental restorations

Background: The clinical relevance of positive patch test reactions to gold sodium thiosulfate in asymptomatic individuals with gold dental restorations is often unclear. Knowledge of the prevalence of gold sensitivity in individuals with and without gold dental restorations is required to better understand the relevance of these reactions. Objective: To determine the prevalence of positive patch test reactions to gold in asymptomatic individuals with gold dental restorations (gold patients) compared with similar individuals without gold dental appliances (nongold patients). Methods: One hundred thirty-six healthy, asymptomatic patients were patch tested to gold sodium thiosulfate, nickel sulfate and palladium chloride. Readings occurred after 2 days and 7 days. Results: Of the patients tested, 24 of 71 (33.8%) gold patients had a positive reaction to gold versus 7 of 65 (10.8%) of the nongold patients, P < .001. Of those with a positive gold reaction, 12 of 31 (38.7%) also had a positive nickel reaction. Nickel alone was positive in 18 of 71 (25.4%) of gold patients versus 11 of 65 (16.9%) of nongold patients. 19 of 29 (65.5%) of those with a positive nickel reaction also reacted to palladium and 19 of 22 (86.4%) of those with a palladium reaction also reacted to nickel. The rate of allergy to gold computed over a 3-year period for patients patch tested in the Oregon Health Sciences University (OHSU) Contact Dermatitis Clinic was 13.5% ( 46 342 ). Conclusions: The prevalence of gold sensitivity in individuals with gold dental restorations is approximately 33.8%. This is significantly greater than the 10.8% prevalence seen in individuals without gold dental appliances, as well as greater than the 3-year rate from the OHSU Contact Dermatitis Clinic. This data should help shed light on issues of clinical relevance.

Prevalence of Gold Sensitivity in Asymptomatic Individuals with Gold Dental Restorations

Prevalence of Gold Sensitivity in Asymptomatic Individuals with Gold Dental Restorations

The prevalence of gold sensitivity in asymptomatic individuals with gold dental restorations

The prevalence of gold sensitivity in asymptomatic individuals with gold dental restorations

A Rabbit Lung Model for Testing Reaction to Inhaled Dental Restorative Particles

A study was designed to test the outcome of the deposition of particles of plastic composite dental restorative material in rabbit lungs. Grinding and polishing these restorations in situ produces some particles in the 0.5- to 10-microns size range that easily enter and remain in human lungs and are associated with industrial lung disease. Dental restorative plastic material was ground in the laboratory, suspended in saline solution, and injected transtracheally into four New Zealand white rabbits. Two control rabbits were similarly injected with saline solution transtracheally. Twenty-four hours later, the rabbits were injected with 1 mCi of 67Ga citrate intravenously and subsequently reanesthetized for scanning. Baseline scans were obtained in the six animals prior to the injection of the test particles. Positive gallium scans were obtained 72 h after the administration of particulate material in the four test rabbits. The gallium scans of the control rabbits remained no different from baseline. The study was repeated one month later. The animals were killed seven days after the last gallium scan. Light microscopy and transmission electron microscopy of the lungs of the test animals showed foci of chronic inflammation around particles of the restorative material. Particles were in vacuoles within alveolar macrophages and also free in interstitium. Control animals had normal histologic conditions. Silver amalgam and gold dental restorations have years of clinical use but the new plastic composite restorative materials are rapidly being introduced into human clinical dental practice. Normal use involves polymerization, grinding, and polishing of the material within the mouth. The chronic inflammation in the lungs of rabbits indicates a need to test dental restorative material for lung biocompatibility before further, extensive clinical use.