www.sbdmj.com - Stomatologija - Baltic Dental and Maxillofacial Journal

Stomatologija 2016; 18 (2): 66-72 334 KB

In vitro color and roughness stability of different temporary restorative materials

Egle Mickeviciute¹, Egle Ivanauskiene², Viktorija Noreikiene²

Summary

Objective. The aim of this study was to evaluate the effects of staining solutions on the color stability and roughness of different provisional resin material.

Material and methods. Three different materials were tested (two polymethylmethacrylate and one bis-acryl composite resins) in cola and coffee and for 1 and 4 weeks. 240 specimens were used – half of them polished and other half not. Color measurements were made before and after immersions using CIE L*a*b*. Surface roughness was measured using profilometer. Data was analyzed by ANOVA and Tukey HSD multiple comparison tests.

Results. The highest ΔE values were observed in the coffee. Unpolished and polished bis-acryl resin showed the highest ΔE values (p<0.00) in both intervals. The i-TEMP had the lowest or one of the least color changes. The time factor had influence on the color stability of provisional materials (p<0.01). The highest Ra values of polished specimens were observed in the cola; i-TEMP exposed the best result (p<0.00). The Pearson Correlation test showed a strong correlation between ΔE and Ra in provisional restorative materials in coffee and weak -moderate correlation in cola.

Conclusions. The higher color stability of polished and unpolished specimens was shown by polymethylmethacrylate than bis-acryl resins. All polished specimens shown better color stability properties than unpolished except for the hot polymerization provisional materials (i-CAB). Polished polymethylmethacrylate showed better results of average roughness in comparison with bis-acryl resin. Cold-polymerization polymethylmethacrylate had better results of color and roughness stability than hot-polymerization polymethylmethacrylate.

Key words: color stability, roughness.

Received: 16 04 2015

Accepted for publishing: 29 06 2016

¹Faculty of Odontology, Lithuanian University of Health Sciences, Kaunas, Lithuania

²Clinical Department of Dental and Maxillar Orthopaedics, Faculty of Odontology, Lithuanian University of Health Sciences, Kaunas, Lithuania

Address correspondence to Egle Ivanauskiene, Clinical Department of Dental and Maxillar Orthopaedics, Sukileliu 51, LT- 50106, Kaunas, Lithuania.

E-mail address: eglesidabrine@gmail.com



	Baltic Dental and Maxillofacial Journal

June, 2016, Vol. 18, No. 2 CONTENTS SCIENTIFIC ARTICLES Management of maxillofacial fractures within three years of empirical findings Marijus Leketas, Evelina Vedlugaitė, Ričardas Kubilius 39-50 Radiologic features of temporomandibular joint osseous structures in children with juvenile idiopathic arthritis. Cone beam computed tomography study Hadeel Al-Shwaikh, Ilga Urtane, Pertti Pirttiniemi, Paula Pesonen, Zane Krisjane, Iveta Jankovska, Zane Davidsone, Valda Stanevica 51-60 Age and gender influence on oral hygiene among adolescents with fixed orthodontic appliances Ieva Kudirkaite, Kristina Lopatiene, Jurate Zubiene, Kristina Saldunaite 61-65 In vitro color and roughness stability of different temporary restorative materials Egle Mickeviciute, Egle Ivanauskiene, Viktorija Noreikiene 66-72 © 2016 Stomatologija		Stomatologija 2016; 18 (2): 66-72 334 KB In vitro color and roughness stability of different temporary restorative materials Egle Mickeviciute¹, Egle Ivanauskiene², Viktorija Noreikiene² Summary Objective. The aim of this study was to evaluate the effects of staining solutions on the color stability and roughness of different provisional resin material. Material and methods. Three different materials were tested (two polymethylmethacrylate and one bis-acryl composite resins) in cola and coffee and for 1 and 4 weeks. 240 specimens were used – half of them polished and other half not. Color measurements were made before and after immersions using CIE Lab. Surface roughness was measured using profilometer. Data was analyzed by ANOVA and Tukey HSD multiple comparison tests. Results.* The highest ΔE values were observed in the coffee. Unpolished and polished bis-acryl resin showed the highest ΔE values (p<0.00) in both intervals. The i-TEMP had the lowest or one of the least color changes. The time factor had influence on the color stability of provisional materials (p<0.01). The highest Ra values of polished specimens were observed in the cola; i-TEMP exposed the best result (p<0.00). The Pearson Correlation test showed a strong correlation between ΔE and Ra in provisional restorative materials in coffee and weak -moderate correlation in cola. Conclusions. The higher color stability of polished and unpolished specimens was shown by polymethylmethacrylate than bis-acryl resins. All polished specimens shown better color stability properties than unpolished except for the hot polymerization provisional materials (i-CAB). Polished polymethylmethacrylate showed better results of average roughness in comparison with bis-acryl resin. Cold-polymerization polymethylmethacrylate had better results of color and roughness stability than hot-polymerization polymethylmethacrylate. Key words: color stability, roughness. Received: 16 04 2015 Accepted for publishing: 29 06 2016 ¹Faculty of Odontology, Lithuanian University of Health Sciences, Kaunas, Lithuania ²Clinical Department of Dental and Maxillar Orthopaedics, Faculty of Odontology, Lithuanian University of Health Sciences, Kaunas, Lithuania Address correspondence to Egle Ivanauskiene, Clinical Department of Dental and Maxillar Orthopaedics, Sukileliu 51, LT- 50106, Kaunas, Lithuania. E-mail address: eglesidabrine@gmail.com