Evaluation of Effects of Different Core & Veneer Thickness Combination on Translucency of Two All Ceramic System: An in Vitro Study"

BHUMIKA SANGTANI; KAVITA MARU; MANISH SANGTANI; ARCHITA GANGWAL

doi:10.22159/ajpcr.2025v18i2.53579

Authors

BHUMIKA SANGTANI Citysmile Dental Clinic, Damoh, Madhya Pradesh, India.
KAVITA MARU Department of Prosthodontics, SAIMS and PGI, Indore, Madhya Pradesh, India.
MANISH SANGTANI District Hospital, Damoh, Madhya Pradesh, India
ARCHITA GANGWAL Department of Dentistry, SAIMS & PGI, Indore, Madhya Pradesh, India

DOI:

https://doi.org/10.22159/ajpcr.2025v18i2.53579

Keywords:

Core and veneer thickness, IPS e-max CAD, IPS e-max PRESS

Abstract

Objectives: The study aimed to evaluate the effect of change in thickness of core or veneer ceramic on translucency of two types of Lithium Di Silicate Glass Ceramic IPS e-max PRESS and IPS e-max CAD.

Methods: A total of 56 disks (IPS e.max PRESS, IPS e.max CAD; Ivoclar Vivadent), 15 mm in diameter with different thicknesses (0.80 mm, 1.00 mm), were fabricated as core materials with the lost wax and heat-press techniques, according to the manufacturer’s recommendations. They were divided into groups (n=7), the size of which was determined by power analysis (Δ=0.2; power=0.80; α=0.05). Each core material was veneered with its compatible veneer ceramic (IPS e.max PRESS, IPS e.max CAD. All surfaces were measured by profilometry to ensure consistency within the groups. A glass disk (1.5 mm) positive control (group P) and a metal core (1.5 mm) negative control (group N) were prepared. The translucency parameter (TP) values were calculated using spectrophotometry to calculate the color differences of the specimens over black and white backgrounds.

Results: IPS e.max PRESS and IPS e.max CAD depicted decreasing order or mean % transmittance as 0.15477 for IPS e.max PRESS (0.5+0.5), 0.14431 IPS e.max PRESS (0.8+0.2), 0.06671 IPS e.max CAD (0.5+0.5), 0.06297 IPS e.max CAD (0.8+0.2). The difference between these groups was found to be statistically significant (p<0.05). However, not significant difference found between Group 1 IPS e.max PRESS (0.8+02)-Group2 IPS e.max PRESS (0.5+0.5) and Group5 IPS e.max CAD (0.8+0.2)-Group6 IPS e.max CAD (0.5+0.5) pairs (p>0.05). One-way analysis of variance found significant differences among the TP values of the ceramic groups (p<0.05).

Conclusion: When overall thickness was increased to 1.5 mm, keeping similar veneer at 0.5 mm IPS e-max CAD exhibited better esthetic outcome than IPS e-max PRESS. Interaction of core and veneer are different with different ceramic systems at different thicknesses. Most appropriate ceramic material can be decided based only on specific clinical situation being faced.

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References

Pilkington EL. Esthetics and optical illusions in dentistry. J Am Dent Assoc. 1936;23(4):641-51.

Anusavice KJ. Phillips’ Science of Dental Materials. South Asia: 2014. p. 451.

Printz H. Pierre Fauchard and his works. Dent Cosmos. 1923;65:827-30.

Balkaya MC, Cinar A, Pamuk S. Influence of firing cycles on the margin distortion of 3 all-ceramic crown systems. J Prosthet Dent. 2005;93(4):346-55. doi: 10.1016/j.prosdent.2005.02.003, PMID 15798685

Barizon KT, Bergeron C, Vargas MA, Qian F, Cobb DS, Gratton DG, et al. Ceramic materials for porcelain veneers. part I: Correlation between translucency parameters and contrast ratio. J Prosthet Dent. 2013;110(5):397-401. doi: 10.1016/j.prosdent.2013.06.008, PMID 23998620

Magne P, Belser U. Bonded Porcelain Restorations in the Anterior Dentition: A Biomimetic Approach. Chicago: Quintessence Publishing; 2002. p. 293-334.

Holloway JA, Miller RB. The effect of core translucency on the aesthetics of all-ceramic restorations. Pract Periodontics Aesthet Dent. 1997;9(5):567-74; quiz 576. PMID 9550082

Chen YM, Smales RJ, Yip KH, Sung WJ. Translucency and biaxial flexural strength of four ceramic core materials. Dent Mater. 2008;24(11):1506-11. doi: 10.1016/j.dental.2008.03.010, PMID 18440062

Walton TR. A 10-year longitudinal study of fixed prosthodontics: Clinical characteristics and outcome of single-unit metal-ceramic crowns. Int J Prosthodont. 1999;12(6):519-26. PMID 10815605

Christensen GJ. The confusing array of tooth-colored crowns. J Am Dent Assoc. 2003;134(9):1253-5. doi: 10.14219/jada.archive.2003.0361, PMID 14528998

Rosenblum MA, Schulman A. A review of all-ceramic restorations. J Am Dent Assoc. 1997;128(3):297-307. doi: 10.14219/jada. archive.1997.0193, PMID 9066214

Shokry TE, Shen C, Elhosary MM, Elkhodary AM. Effect of core and veneer thicknesses on the color parameters of two all-ceramic systems. J Prosthet Dent. 2006;95(2):124-9. doi: 10.1016/j.prosdent.2005.12.001, PMID 16473086

Hegde C, Nitin A, Vijai S, Anil SR, Ramya D. Metal free restorations. J Interdiscipl Dent. 2011;1(1):10-3. doi: 10.4103/2229-5194.77189

Heintze SD, Cavalleri A, Zellweger G, Büchler A, Zappini G. Fracture frequency of all-ceramic crowns during dynamic loading in a chewing simulator using different loading and luting protocols. Dent Mater. 2008;24(10):1352-61. doi: 10.1016/j.dental.2008.02.019, PMID 18433859

Etman MK, Woolford MJ. Three-year clinical evaluation of two ceramic crown systems: A preliminary study. J Prosthet Dent. 2010;103(2):80- 90. doi: 10.1016/S0022-3913(10)60010-8, PMID 20141812

Brodbelt RH, O’brien WJ, Fan PL, Frazer-Dib JG, Yu R. Translucency of human dental enamel. J Dent Res. 1981;60(10):1749-53. doi: 10.1177/00220345810600100401, PMID 6944339

Xiong F, Chao Y, Zhu Z. Translucency of newly extracted maxillary central incisors at nine locations. J Prosthet Dent. 2008;100(1):11-7. doi: 10.1016/S0022-3913(08)60128-6, PMID 18589069

Antonson SA, Anusavice KJ, Antonson SA, Anusavice KJ. Contrast ratio of veneering and core ceramics as a function of thickness. Int J Prosthodont. 2001;14(4):316-20. PMID 11508085

Kursoglu P, Karagoz Motro PF, Kazazoglu E. Translucency of ceramic material in different core-veneer combinations. J Prosthet Dent. 2015;113(1):48-53. doi: 10.1016/j.prosdent.2014.07.011, PMID 25277036

Höland W, Schweiger M, Frank M, Rheinberger V. A comparison of the microstructure and properties of the IPS Empress 2 and the IPS Empress glass ceramics. J Biomed Mater Res. 2000;53(4):297- 303. doi: 10.1002/1097-4636(2000)53:4<297:aid-jbm3>3.0.co;2-g, PMID 10898870

Chu FC, Chow TW, Chai J. Contrast ratios and masking ability of three types of ceramic veneers. J Prosthet Dent. 2007;98(5):359-64. doi: 10.1016/S0022-3913(07)60120-6, PMID 18021824

O’Brien WJ, Kay KS, Boenke KM, Groh CL. Sources of color variation on firing porcelain. Dent Mater. 1991;7(3):170-3. doi: 10.1016/0109- 5641(91)90038-z, PMID 1813339

Johnston WM, Kao EC. Assessment of appearance match by visual observation and clinical colorimetry. J Dent Res. 1989;68(5):819-22. doi: 10.1177/00220345890680051301, PMID 2715476

Heffernan MJ, Aquilino SA, Diaz-Arnold AM, Haselton DR, Stanford CM, Vargas MA. Relative translucency of six all-ceramic systems, part II: Core materials. J Prosthet Dent. 2002;88:11-5.

Pande N, Kolarkar MS. Spectrophotometric evaluation of shade reproduction of pressable all-ceramic system on un-stained and stained tooth: An in vitro study. J Indian Prosthodont Soc. 2016;16(1):63-9. doi: 10.4103/0972-4052.175711, PMID 27134430

Lee YK, Cha HS, Ahn JS. Layered color of all-ceramic core and veneer ceramics. J Prosthet Dent. 2007;97(5):279-86. doi: 10.1016/j. prosdent.2007.03.010, PMID 17547946

McLean JW. New dental ceramics and esthetics. J Esthet Dent. 1995;7(4):141- 9. doi: 10.1111/j.1708-8240.1995.tb00570.x, PMID 8527206

Ozturk O, Uludag B, Usumez A, Sahin V, Celik G. The effect of ceramic thickness and number of firings on the color of two all ceramic systems. J Prosthet Dent. 2008;100(2):99-106. doi: 10.1016/S0022- 3913(08)60156-0, PMID 18672126

Harianawala HH, Kheur MG, Apte SK, Kale BB, Sethi TS, Kheur SM. Comparative analysis of transmittance for different types of commercially available zirconia and lithium disilicate materials. J Adv Prosthodont. 2014;6(6):456-61. doi: 10.4047/jap.2014.6.6.456, PMID 25551005