Effect of bleaching on color change and refractive index of dental composite resins

Download

index.pdf

Date

2008-01-01

Author

HUBBEZOĞLU, İHSAN
Akaoglu, Baris
DOĞAN, ARİFE
Keskin, Selda
Bolayir, Giray
ÖZÇELİK, SÜLEYMAN
DOĞAN, ORHAN MURAT

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

112
views

0
downloads

This study investigated the effects of three bleaching agents (Whiteness Perfect, Whiteness Super, and Whiteness HP) on the color change and refractive index of three dental composites (Admira, Durafill VS, and Gradia Direct). Twenty diskshaped specimens (10 x 2 mm) of each composite were prepared and divided into four subgroups (n = 5). An unbleached group was used as a control, while the remaining specimens in the three subgroups were bleached with one of the bleaching agents respectively. Color change was assessed according to CIELAB color system and refractive indices were determined by phase modulated spectroscopic ellipsometry. Color differences between bleaching and baseline value (Delta E) were less than 3.3 for all groups. However, bleaching with Whiteness HP led to noticeable color changes for Admira and Durafill VS. While this agent had no effect on the refractive indices of these composites, the other two agents containing carbamide peroxide increased their refractive indices. Therefore, results suggested that replacement of such composite restorations may be required after bleaching.

Subject Keywords

Ceramics and Composites, General Dentistry

URI

https://hdl.handle.net/11511/68437

Journal

DENTAL MATERIALS JOURNAL

DOI

https://doi.org/10.4012/dmj.27.105

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

The effect of Esthetic fibers on impact resistance of a conventional heat-cured denture base resin Dogan, Orhan Murat; Bolayir, Giray; Keskin, Selda; Dogan, Arife; Bek, Bulent; Boztug, Ali (Japanese Society for Dental Materials and Devices, 2007-03-01) This study was conducted to observe the changes in impact resistance of a denture base resin reinforced with five types of fiber. E-glass, polyester, rayon, nylon 6, and nylon 6/6 fibers were cut into 2, 4, and 6 mm lengths and added into the resin at a concentration of 3% by weight. Five test specimens for each formulation, as well as control specimens without fiber, were prepared using a mold including a V-shaped notch with 55 x 10 x 10 mm dimensions. Impact tests were carried out using a Charpy-type test...
In vitro Comparison of Autoclave Polymerization on the Transverse Strength of Denture Base Resins Durkan, Rukiye; ÖZEL, MEHMET BİROL; Bagis, Bora; Usanmaz, Ali (Japanese Society for Dental Materials and Devices, 2008-07-01) The aim of this study was to determine the effect of autoclave polymerization on the transverse strength of denture base polymers. To this end, 30 rectangular test specimens were fabricated of two heat-polymerized denture base polymers. The test groups were: (I) control. i.e.. conventional water bath to polymerize result by heat at 100 degrees C for 30 minutes; (II) autoclave polymerization at 60 degrees C for 30 minutes followed by 130 degrees C for 10 minutes; and (III) autoclave polymerization at 60 degr...
THE EFFECT OF HEAT-TREATMENT ON THE PROPERTIES OF PEEK AND APC2 FOLKES, MJ; KALAY, G (Elsevier BV, 1993-01-01) The effects of various thermal treatments on the properties of both PEEK and APC2 have been systematically studied. X-ray diffraction data, together with dynamic mechanical measurements, indicate that the T(g) values for both materials are considerably higher than those generally reported. Also, the tan delta values for quenched APC2 specimens are considerably higher than for slowly cooled materials. Microstructural observations show that this is likely to be due to poor fibre/matrix adhesion, in the case o...
The effect of acquired salivary pellicle on the surface free energy and wettability of different denture base materials Sipahi, C; Anil, N; Bayramlı, Erdal (Elsevier BV, 2001-03-01) Objective: The objective of the present study was to evaluate the effect of salivary coating on the wettability and surface free energy of different denture base materials.
Finite element analysis of strength characteristics of various resin based restorative materials in Class V cavities Yaman, SD; Şahin, Melin; Aydin, C (Wiley, 2003-06-01) This study investigated the strength characteristics of various composites (Tetric Ceram, Tetric Flow, Prisma AP.H, Synergy Duo Shade, Synergy Compact, and Z 100) and compomers (Compoglass, Compoglass F, Dyract AP, F 2000) that were applied in a Class V cavity of a maxillary central incisor. The study was conducted by using a 3-dimensional finite element approach and in the study ansys package program was used. The tooth model had 294 elements and 420 nodes. The teeth considered were assumed to be subjected...

Citation Formats

İ. HUBBEZOĞLU et al., “Effect of bleaching on color change and refractive index of dental composite resins,” DENTAL MATERIALS JOURNAL, pp. 105–116, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68437.