Effect of toothpaste with different components on toothbrushing wear resistance of micro-hybridano-filled resin composites
10.14815/kjdm.2023.50.4.247
- Author:
Seon-Mi BYEON
1
;
Jung-Eun PARK
;
Kyeong-Seon KIM
;
Tae-Hwan KIM
;
Chung-Cha OH
;
Seung-O KO
;
Min-Ho LEE
Author Information
1. Department of Dental Biomaterials, Institute of Biodegradable Materials, Institute of Oral Bioscience, School of Dentistry, Jeonbuk National University, Jeonju, Korea
- Publication Type:Original Article
- From:
Korean Journal of Dental Materials
2023;50(4):247-265
- CountryRepublic of Korea
- Language:English
-
Abstract:
The purpose of this study was to observe the surface morphology and roughness of micro-hybrid and nano-filled resin composites and compare wear resistance by conducting a toothbrushing wear test with toothpastes with different abrasive ingredients. Two types of resin composites containing micro-hybrid fillers (Z100 Restorative, Filtek Z250) and one type of resin composite containing nanofillers (Filtek Z350 XT) were used. For the toothbrushing wear test, 90 resin composite samples with a diameter of 10 mm and a thickness of 1 mm were prepared. A force of 2 N and 100,000 cycles of brushing were performed using a pin-on-disk wear tester. The toothpastes used in the test were classified into 4 groups according to the abrasive ingredients (hydroxyapatite, calcium carbonate, sodium bicarbonate, and zeolite-M). After the toothbrushing wear test, the surface morphology of the samples was observed using an optical microscope and a scanning electron microscope (SEM), and the surface roughness was measured using atomic force microscopy (AFM). Relatively large filler particles (micro size) protruded from the surface of the micro-hybrid resin composite groups, and small crater-shaped defects were observed. The surface roughness values of the groups that performed the wear test with toothpaste containing zeolite-M were significantly higher than the other groups (P<0.05). The surface roughness value was significantly (P<0.05) highest in the group where the nanofilled resin composite was wear-tested with toothpaste containing zeolite-M. However, regardless of the type of toothpaste, the surface roughness showed low values of less than 0.1 μm. The surface appeared uniform and smooth compared to the surface of micro-hybrid resin composites. Finally, the nano-filled resin composite showed relatively higher wear resistance than the micro-hybrid resin composite. This means that wear resistance during brushing may indicate the durability of the material in the clinic.
