Elif Ãztürk1, Gizem Güder2 1Hacettepe University
Surface roughness of nano-hybrid composites before and after immersing in a sports drink Elif Öztürk1, Gizem Güder2 1Hacettepe University, Faculty of Dentistry, Department of Restorative Dentistry, Ankara, Turkey 2Kocaeli University, Faculty of Dentistry, Department of Restorative Dentistry, Kocaeli, Turkey OBJECTIVES • Direct resin composites have become the material of choice since they can be used to repair the loss of tooth structure modifying the shape, color and texture as well as maintaining the natural appearance due to their simple bonding procedures, and enhanced physical and chemical properties. Consumption of certain beverages may alter the physical and aesthetic properties of resin composites and thus can affect the clinical success of the resin restorations. Furthermore, beverages contain chemicals that can lead to wear and surface degradation of the restoration. • Optical profilometry is a three-‐‑dimensional (3D) analysis method that provides both a qualitative and quantitative representation of the surface. • The purpose of this study was to evaluate the differences in surface roughnesses of two different nano-‐‑hybrid composite after immersing in a sports drink.
2 mm
MATERIALS AND METHODS Fourty disk-‐‑shaped specimens (diameter:10-‐‑mm;thickness:2-‐‑mm) were prepared from two different nano-‐‑hybrid resin composites (Cavex Quadrant Universal LC, Cavex, Haarlem, The Netherlands and Tetric N-‐‑Ceram, Ivoclar Vivadent, Schaan, Liechtenstein). Each specimen was cured under the mylar strips for 20 seconds from each of top and boVom surfaces. All the specimens were stored in distilled water for 24 h at 37°C. Baseline measurements of surface roughness (Ra) values were performed with a 3D-‐‑optical-‐‑profilometer (NewViewTM 7200, Zygo). Specimens were immersed in a sports drink (Redbull, The Coca-‐‑Cola Co., Turkey) 3 minutes daily for a period of 30 days. Control groups were stored in distilled water only. Surface roughnesses were measured after the immersion period. For each composite 3 measurements were performed and the average was recorded. Data were statistically analyzed using Univariate Analysis of Variance test (SPSS 20.0) (p=0.05).
RESULTS There was statistically no difference between the Ra values of the study groups before or after immersing in distilled water or sports drink (p>0.05).
CONCLUSIONS The tested sports drink did not cause any alteration in 3D-‐‑surface roughnesses of the selected nano-‐‑hybrid composites for a 30-‐‑day evaluation period.
A 3D surface image from Cavex before and after immersing in Redbull
A 3D surface image from Tetric N-‐‑Ceram before and after immersing in Redbull
Ra Values COMPOSITE BEVERAGE Mean (SD) Baseline 0.41 (0.2) Redbull 0.45 (0.2) Cavex Distiled Water 0.4 (0.2) Baseline 0.46 (0.2) Tetric N-‐‑ Redbull 0.52 (0.2) Ceram Distiled Water 0.39 (0.1) Statistically no significant difference between the groups (p>0.05).
2 mm
MATERIALS AND METHODS Fourty disk-‐‑shaped specimens (diameter:10-‐‑mm;thickness:2-‐‑mm) were prepared from two different nano-‐‑hybrid resin composites (Cavex Quadrant Universal LC, Cavex, Haarlem, The Netherlands and Tetric N-‐‑Ceram, Ivoclar Vivadent, Schaan, Liechtenstein). Each specimen was cured under the mylar strips for 20 seconds from each of top and boVom surfaces. All the specimens were stored in distilled water for 24 h at 37°C. Baseline measurements of surface roughness (Ra) values were performed with a 3D-‐‑optical-‐‑profilometer (NewViewTM 7200, Zygo). Specimens were immersed in a sports drink (Redbull, The Coca-‐‑Cola Co., Turkey) 3 minutes daily for a period of 30 days. Control groups were stored in distilled water only. Surface roughnesses were measured after the immersion period. For each composite 3 measurements were performed and the average was recorded. Data were statistically analyzed using Univariate Analysis of Variance test (SPSS 20.0) (p=0.05).
RESULTS There was statistically no difference between the Ra values of the study groups before or after immersing in distilled water or sports drink (p>0.05).
CONCLUSIONS The tested sports drink did not cause any alteration in 3D-‐‑surface roughnesses of the selected nano-‐‑hybrid composites for a 30-‐‑day evaluation period.
A 3D surface image from Cavex before and after immersing in Redbull
A 3D surface image from Tetric N-‐‑Ceram before and after immersing in Redbull
Ra Values COMPOSITE BEVERAGE Mean (SD) Baseline 0.41 (0.2) Redbull 0.45 (0.2) Cavex Distiled Water 0.4 (0.2) Baseline 0.46 (0.2) Tetric N-‐‑ Redbull 0.52 (0.2) Ceram Distiled Water 0.39 (0.1) Statistically no significant difference between the groups (p>0.05).
