geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Spectrophotometric evaluation of the effect of high noble, high-palladium and base metal alloys on the color of metal-ceramic restorations


, : Spectrophotometric evaluation of the effect of high noble, high-palladium and base metal alloys on the color of metal-ceramic restorations.

Color match between the restoration and the patient’s natural teeth has always been a source of concern in esthetic dentistry. One of the reasons for a lack of color match between the restoration and the natural teeth is the type of the alloy used in the metallic structure of the restoration. The aim of this study was to assess and compare the effect of 4 alloys on the color of the overlying porcelain: Degobond 4 from the high noble group, Begopal from the high-palladium group, and Super Cast and Minalux from the nickel-chromium base metal group.Materials and In this in vitro study, twenty disks, measuring 2 mm in thickness and 10 mm in diameter, were prepared (5 samples from each alloy). Then Vita 3DMaster 3M2 porcelain was placed on the samples. In addition, 5 control samples, measuring 2 mm in thickness, were prepared from the porcelain. A spectrophotometer was used to determine sample colors, which were evaluated based on CIELAB system. Data was analyzed with one-way ANOVA and Tukey test (α = 0.05). The four alloys in this study exhibited significant differences in a* and b* values from the control group (p value 0.05). There were significant differences in L* values between Supercast and Begopal (p value = 0.009) and between Begopal and the control (p value = 0.013) groups. There were no significant differences in ?E between the alloys.The type of the alloy has an effect on the final color of porcelain; however, this color difference is clinically acceptable.

US$29.90


Other references

Millichap, J.G.; Jones, J.D., 1964: Acid-Base, Electrolyte, And Amino-Acid Metabolism In Children With Petit Mal. Etiologic Significance And Modification By Anticonvulsant Drugs And The Ketogenic Diet. Epilepsia 5: 239-255

Skurikhina L.A., 1983: Genome organization of grayling thymallus thymallus. Biologicheskie Nauki (moscow): 26

McMahon, A.J.; Green, S.T.; Sandler, M.; Hillis, W.S., 1987: Alcoholic ketoacidosis: a case report. A 43-year-old alcoholic presented in coma with ketoacidosis, after three days of nausea and feeling generally unwell, which had been preceded by a prolonged three-week period of heavy alcohol consumption with poor dietary intake. The acidosis resp...

Loukissas, P.; Triantafyllopoulos, N., 2002: Island-community involvement in tourism land-use planning. This chapter shows the importance and the role of community involvement in spatial tourist development and the factor of land development in particular, through specific examples, primarily from the Mediterranean, as well as the Caribbean and Paci...

Ramakrishnan, G.; Wright, M.; Alam, M.; Naylor, C.; Kabir, M.; Zerin, A.; Ferdous, T.; Pedersen, K.; Hennig, B.J.; Donowitz, J.R.; Wegmuller, R.; Haque, R.; Petri, W.A.; Herbein, J.; Gilchrist, C.A., 2016: Rapid assessment of tetanus vaccine-induced immunity in Bangladesh and the Gambia. NlmCategory="UNASSIGNED">We have developed recombinant fragment C based rapid point of care dipstick devices to assess tetanus immunization status using plasma or whole blood. The devices demonstrated specificity of 0.90 and sensitivi...

Zanjani, E.D.; Ruthven, A.; Ruthven, J.; Shaft, D.; Smith, E.; Flake, A.W., 1994: In utero hematopoietic stem cell transplantation results in donor specific tolerance and facilitates postnatal Boosting of donor cell levels. Blood 84(10 SUPPL 1): 100A

Grether, J.K.; Nelson, K.B.; Dambrosia, J.M.; Phillips, T.M., 1999: Interferons and cerebral palsy. Objective: To explore the association of neonatal interferons (IFNs) with spastic cerebral palsy (CP) and with other measured substances. Study design: Assays of archived neonatal blood of 31 predominantly term children with CP and 65 children in...

Ziemba, A.; Nazar, K.; Kaciuba-Uściłko, H.; Bicz, B.; Titow-Stupnicka, E., 1992: Thermal effect of glucose in women with normal carbohydrate tolerance: relationship to body mass index, blood insulin and noradrenaline. Relationships between energy expenditure, body mass index (BMI), blood glucose (BG) responses to glucose ingestion were studied in 35 women aged 22-55 yrs with normal carbohydrate tolerance. In 13 of them plasma insulin (IRI) and catecholamine con...

Rakov, A.I.; Dorfman, M.V., 1966: On the work of the International Committee on Clinical Tumor Classification. Voprosy Onkologii 12(3): 109-114

Savory, A., 1979: Brush control and erosion in perspective under short duration grazing. Beef cattle science handbook6(16): 384-387