Using Kubelka-Munk reflectance theory to predict optimal pink composite thickness and shade with an opaqued PEEK background for a final gingival color: An in vitro study

Gouveia D., Yilmaz B., ÇEVİK P., Johnston W. M.

DENTAL MATERIALS, cilt.38, sa.9, ss.1452-1458, 2022 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Sayı: 9
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.dental.2022.06.027
  • Dergi Adı: DENTAL MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Biotechnology Research Abstracts, Communication Abstracts, EMBASE, INSPEC, MEDLINE, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1452-1458
  • Anahtar Kelimeler: Color, Composite resin, Dental prosthesis, Polyetheretherketone, Radiation, Scattering, IMPLANT, PROSTHESES, POLYMER, GUIDES, PEKK
  • Gazi Üniversitesi Adresli: Evet

Özet

Objectives: The aims of this study were to demonstrate and evaluate how Kubelka-Munk (K-M) reflectance theory is used to adjust the color of the opaqued PEEK backing and the color and thickness of the resin composite layers in different thicknesses in order to minimize the color difference from a target gingival color.Methods: PEEK specimens were opaqued with either a dark or a light opaquer. Composite resin layers in 3 different colors were fabricated in varying thicknesses. Reflectance of opa-qued PEEK and composite layers was determined using a spectroradiometer. Kubelka-Munk (K-M) absorption (K) and scattering (S) coefficients were derived for each material and then K-M reflectance theory was then used to predict the reflectance of each composite disk as layered on each backing. The color of the opaqued PEEK backings alone and the color of 12 pink composite layers on opaqued PEEK backings was calculated for the CIE D65 Illuminant. Composite resins in 3 different color were then bonded to the opaqued PEEK specimens and color differences of these specimens from the theoretical colors were determined.Results: The increment E00 values ranged from 0.45 to 1.29 units for the bonded pink specimens and the K-M theory. K-M theory was validated as a viable predictor of gingival color using pink composite bonded to opaqued PEEK background.Significance: Using K-M theory to predict the gingival color of pink composite bonded to opaqued PEEK eliminates the need to make many specimens of different thicknesses that would otherwise be required to find an acceptable color match.(c) 2022 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.