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yxfbbiedtj · Wysłany: Pon 16:17, 14 Mar 2011

Gold deposits of the Clinical Evaluation of crown

Body 6 months after the repair of a 3-year track observation. The results showed: 120 successful, three failed in 2 patients found to have mild gum inflammation. l2 cases of primary nickel-chromium alloy-porcelain crown cervical margin of the black lines were treated with crown of gold deposits, gum color, shape normal, no gingival inflammation. 3 Discussion General PFM color is not natural, easily oxidized metal edge of the neck caused gingival black line,[link widoczny dla zalogowanych], stimulation of the gums caused by gingivitis and other diseases. Although better than the normal metal ceramic crown fused to metal crown, but the casting might change the composition of the impurities or affect the alloy's biocompatibility; casting crown edge effects such as edge sometimes there is not complete, do not close the edge contraction joint problems; cast metal ceramic crown thickness within the 0.4rain, than the crown of gold deposition thickness 0.2rain about double the relative reduction in the thickness of porcelain limited, difficult to restore a sense of the natural tooth color levels; the increase oxidation temperature within the crown black, color not natural, can not achieve the best aesthetic effect. Crown of gold deposited by using electroplating techniques, the crown is only 0.2rain thick, conducive to the plastic surface of ceramic powder to increase the level of flu, and after deposition of 99.99% of the crown was warm yellow gold, heating does not change color after, close to the color of dentin, so the crown of gold deposits can reach the ideal aesthetic _IJ. Gold with anti-corrosive, very few of the oral soft tissues and allergic reactions. Traditional PFM enhanced by the oxidation of alloy composition the combination of metal and porcelain; and gold deposited by the crown 667 * is a powder and ceramic powder particles by the formation of gold mixed with agent - gold clay to enhance their combination. Thus, the combination of gold in the two metal components and as the only good biocompatibility _2J. Because the crown is formed by electroplating deposition, this technique requires only use new materials, so to avoid the metal casting process shrinkage produced, uneven, impurities and other issues. In general, the highest edge of the gap, if less than 50 postal l,[link widoczny dla zalogowanych], l available clinical effects of long-lasting repair. Produced by deposition of gold plating deposition porcelain crown, porcelain crowns before and after sintering fused the gap in the l9-60panE3l. Therefore, the accuracy of the edge is golden crown another feature of the deposition, reducing the gingival inflammation. The thickness of the crown of gold deposits generally 0.2rain, in such crown on 1-1.5rain thick porcelain, with the traditional PFM,[link widoczny dla zalogowanych], a decrease of the amount of tooth preparation, help to protect the living dental pulp. Porcelain crown of gold deposits in the intensity of the performance of the flexural capacity of porcelain, gold and porcelain crown deposits and gold deposits of the binding strength of the crown itself, ... 1, where the key is the combination of metal and porcelain. Many experimental studies have shown that E2-3J, the gold deposits on the anterior porcelain crown stump pressure load, the fracture load values when> 150N (anterior teeth in the mouth, chewing an average force of 100-150N). After 6 months of a 3-year follow-up observations of all 96 cases a total of 128 restorations, only three fail, the failure rate was only 2.3%, 1 case of anterior teeth for the pile off the retention problem, 2 cases of ceramic porcelain collapse, occurred in the molars, indicating that the effect of short-term fix l clinical satisfaction,[link widoczny dla zalogowanych], long-term clinical results remains to be seen. Crown of gold deposition is a significant advantage of the natural tooth color and precise marginal fit, so, in the outpatient follow-up, are generally well-received. L2 cases, especially the original alloy-porcelain crown ordinary poor, gold deposition effect of crown restored more obvious, the first black gum line disappeared, followed by the natural color than the original. In this group of cases reviewed in the gums were normal, 2 cases of gingivitis patients, 1 patient was overhanging edges, that is, restoration of tooth width ratio of the edge of shoulder width, and cause mild inflammation, and 1 patients with full mouth Gingivitis, that is not done crown gingival margin are red, swollen gums, so this two cases are not included in the failed cases. Gold deposit in terms of aesthetics of porcelain, edge seal,[link widoczny dla zalogowanych], biocompatibility, or strength, etc. can be used as an alternative to traditional casting crown to promote the use of chemicals. [
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