Indian Journal of Contemporary Dentistry
  • Year: 2018
  • Volume: 6
  • Issue: 2

Influence of material type, thickness, and substrate color on the masking ability of two ceramics over different substrates

  • Author:
  • Niharika Singh Chuhan1,, Kuldeep Singh Sandu2, Kapil Jhajharia3, Abhikumar Shingala4, Parul Bhalala5
  • Total Page Count: 6
  • Page Number: 11 to 16

1Senior Lecturer, Department of Prosthodontics, Modern Dental college and Research Center, Indore

2Senior Lecturer, Department of Endodontics, RR Dental College, Umarda, Udaipur, Rajasthan

3Ex-Assistant Professor, Department of Endodontics, Faculty of Dentistry, Melaka Manipal Medical College, Melaka, Malaysia

4MPH Candidate, Class of 2018, Tennessee State University

5Private Practitioner, Surat, Gujarat

*Corresponding author: Dr. Niharika Singh Chuhan, Department of Prosthodontics, Modern Dental college and Research Center, Indore Tel: 9427350988, E-mail: researchguide86@gmail.com

Online published on 6 September, 2018.

Abstract

Aim of this study was to examine the influence of material type, thickness, and substrate color on the masking ability of two ceramics over different substrates.

In total, 36 disc-shaped specimens (15 mm in diameter × 0.5-and 1.0-mm thicknesses) were fabricated from lithium disilicate glass ceramic (IPS e.max Press, n = 6), high-translucent zirconia (Lava Plus, n = 6), and high-translucent zirconia with liner material (Lava Plus/Liner, n = 6). Contrast ratios were measured over white and black substrates. Color differences were measured over different substrates: white, black, metal, and resin composite shades A2, A3, and C4. White and A2 substrates were used as reference groups. Contrast ratio and color difference values were analyzed with linear regression (P<0.05).

Contrast ratios in the IPS e.max Press group at 0.5 and 1.0 mm showed the highest values (0.73 ± 0.04 and 0.87 ± 0.01) when compared with those in the Lava Plus and Lava Plus/Liner groups. IPS e.max Press at both thicknesses showed the highest masking ability over various substrates. Higher contrast ratio and masking ability were significantly related to thicker material. Material type, thickness, and substrate were significantly related to masking ability.

Ceramic type, thickness, and substrate color are strongly associated with contrast ratio and masking ability, both of which increase as thickness increases. Increased ceramic thickness could benefit masking ability. For improved masking ability, IPS e.max Press is recommended over Lava Plus and Lava Plus/Liner for the masking of dark substrates.

Keywords

Ceramic, masking ability, substrate, thickness