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Dental Prostheses: Past, Present and Future Trends

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Prof. Dr. Meda-Lavinia Negrutiu

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Guest Editor

1. Department of Prostheses Technology and Dental Materials, Faculty of Dental Medicine, Victor Babeş University of Medicine and Pharmacy Timisoara, Timisoara, Romania
2. Research Center in Dental Medicine Using Conventional and Alternative Technologies, Timisoara, Romania
Interests: dental materials and prostheses technology, alternative technologies in prosthodontics; imagistic investigations in dentistry – optical coherence tomography, polymer injection technology; unconventional technologies of investigation, analysis, prognosis in dentistry

Prof. Dr. Liviu Marsavina

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Guest Editor

Faculty of Mechanics, Polytechnic University of Timisoara, 1 Mihai Viteazu Ave., 300222 Timisoara, Romania
Interests: the application of fracture mechanics to engineering structures; fatigue life assessment; experimental fracture mechanics
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Dear Colleagues,

Dental Prostheses represents a crucial moment in the dental treatment. There are many technological possibilities for making different prosthetic constructs nowadays. From conventional methods towards the digital ones, all of them came with advantages and limitation. Scanning methods (direct, in the oral cavity or indirect, on the dental impression or model) are followed by different ways of producing them such as CAM, SLS, SLM and other 3D printing methods. All of them need to be characterize in term of mechanical properties, biocompatibility and cytotoxicity. New technologies as well as new materials could emerge in this topic.

Beside the technologies, an important issue is represented by the evaluation of the prosthetic construct integrity. There are different evaluation methods that can be implied in a destructive or non-destructive way to analyze the defectoscopy of the dental prosthesis. Solution for optimizing the prosthesis depending on the magnitude and position of the defect is also important.

We kindly invite you to submit your manuscript(s) for this Special Issue, including full papers, communications and reviews.

Prof. Dr. Meda-Lavinia Negrutiu
Prof. Dr. Liviu Marsavina
Guest Editors

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Research

13 pages, 14941 KiB

Open AccessArticle

Development of Thickness-Dependent Predictive Methods for the Estimation of the CIEL*a*b* Color Coordinates of Monolithic and Layered Dental Resin Composites

by Maria Tejada-Casado, Razvan Ghinea, María M. Pérez, Javier Ruiz-López, Henning Lübbe and Luis Javier Herrera

Materials 2023, 16(2), 761; https://doi.org/10.3390/ma16020761 - 12 Jan 2023

Cited by 4 | Viewed by 1624

Abstract

Usually, dentin and enamel shades are layered in dental restorations with the purpose of mimicking the natural appearance of teeth. The main objective of this study was to develop and assess accuracy of a color-prediction method for both monolithic and layered dental resin-based composites with varying shades and under different illuminants. A total of 15 different shades of VITAPAN Excell, VITAPAN Dentine and VITA Physiodens as well as VITA Enamel of five different thicknesses (0.5–2.5 mm range) were used to manufacture monolithic and layered samples. A non-contact spectroradiometer with CIE

45^{\circ} / 0^{\circ}

geometry was used to measure the color of all samples over a standard ceramic black background. Second-degree polynomial regression was used as predictive method for CIE-L*a*b* color coordinates. Performance of predictive models was tested using the CIEDE2000 total color difference formula (

Δ E_{00}

), while accuracy was evaluated by comparative assessment of

Δ E_{00}

with corresponding 50:50% acceptability (

A T_{00}

) and perceptibly (

P T_{00}

) thresholds for dentistry. A mean color difference between measured (real) and predicted color of

Δ E_{00} = 1.71

, with 62.86% of the color differences below

A T_{00}

and 28.57% below

P T_{00}

, was registered for monolithic samples. For bi-layered samples, the mean color difference was roughly

Δ E_{00} = 0.50

, with generally 100% and more than 85% of the estimations below

A T_{00}

and

P T_{00}

, respectively. The predictive method allowed highly accurate color estimations for both monolithic and layered dental resin-based composites with varying thicknesses and under different illuminations. These results could be useful to maximize the clinical success of dental restorations. Full article

(This article belongs to the Special Issue Dental Prostheses: Past, Present and Future Trends)

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