{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T21:13:11Z","timestamp":1775855591200,"version":"3.50.1"},"reference-count":49,"publisher":"Operative Dentistry","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,9]]},"abstract":"<jats:title>SUMMARY<\/jats:title>\n        <jats:sec>\n          <jats:title>Objectives<\/jats:title>\n          <jats:p>This study aimed to evaluate the surface gloss, surface roughness, and color change of restorative materials after a three-body wear abrasion.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Methods and Materials<\/jats:title>\n          <jats:p>Four resin composites with different filler particle size (Gracefil Flo [GFF, 0.7 \u03bcm], Gracefil LoFlo [GFL, 0.25 \u03bcm], Gracefil ZeroFlo [GFZ, 0.15 \u03bcm], and Gracefil Putty [GFP, 0.3 \u03bcm]), two CAD\/CAM resin composite blocks with different filler particle size (Cerasmart 300 [CS3, 0.7 \u03bcm] and Cerasmart Prime [CSP, 0.3 \u03bcm], GC), and one CAD\/CAM lithium disilicate glass-ceramic block (Initial LiSi Block [ILS], GC) as a control were evaluated. Twenty slab-shaped specimens were obtained from each material. Ten specimens were subjected to 80,000 toothbrushing strokes and measured for surface gloss (Gloss Unit, GU), surface roughness (Ra, \u03bcm), and color (<jats:italic>L<\/jats:italic>*, <jats:italic>a<\/jats:italic>*, and <jats:italic>b<\/jats:italic>* values) before toothbrushing and at every 20,000 strokes. Color differences (\u0394<jats:italic>L<\/jats:italic>*, \u0394<jats:italic>a<\/jats:italic>*, \u0394<jats:italic>b<\/jats:italic>*, and \u0394<jats:italic>E<\/jats:italic><jats:sub>00<\/jats:sub>) before and after toothbrushing were calculated. After 80,000 strokes, abraded surfaces were observed using scanning electron microscopy. The other 10 specimens were measured for Vickers microhardness (VHN).<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Results<\/jats:title>\n          <jats:p>After 80,000 toothbrushing strokes, the mean GU ranged from 60.43 to 16.12 (the highest for ILS and lowest for GFL), and the mean Ra ranged from 0.079 to 4.085 (the lowest for ILS and highest for GFL). At all measuring stages, the calculated \u0394<jats:italic>E<\/jats:italic><jats:sub>00<\/jats:sub> values ranged from 0.31 to 0.92 for all materials. The mean VHN ranged from 632.34 to 39.08 (the highest for ILS and lowest for GFZ). The resin composite containing the largest filler particle (GFF) showed significantly lower Ra and higher VHN than other resin composites (GFL, GFZ, and GFP). The CAD\/CAM resin composite block containing a smaller filler particle (CSP) retained significantly higher GU than that containing a larger filler particle (CS3). A negative correlation between GU and Ra was detected.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Conclusions<\/jats:title>\n          <jats:p>Based on the findings, toothbrush abrasion induced a decrease in GU and an increase in Ra for all resin-based materials tested. Resin-based materials with larger filler size tended to show lower Ra, while resin-based materials with smaller filler size tended to show a smaller reduction in GU. These were more pronounced for light-cure resin composites than for resin composite blocks for CAD\/CAM.<\/jats:p>\n        <\/jats:sec>","DOI":"10.2341\/22-123-l","type":"journal-article","created":{"date-parts":[[2023,8,28]],"date-time":"2023-08-28T03:04:14Z","timestamp":1693191854000},"page":"575-587","source":"Crossref","is-referenced-by-count":6,"title":["Surface Properties of Resin Composites and CAD\/CAM Blocks After Simulated Toothbrushing"],"prefix":"10.2341","volume":"48","author":[{"given":"M","family":"Suzuki","sequence":"first","affiliation":[{"name":"*Masaya Suzuki, DDS, PhD, Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Y","family":"Miyano","sequence":"additional","affiliation":[{"name":"Yuko Miyano, DDS, Advanced Operative Dentistry-Endodontics, The Nippon Dental University Graduate School of Life Dentistry at Niigata"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F","family":"Sato","sequence":"additional","affiliation":[{"name":"Fumiaki Sato, DDS, PhD, Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K","family":"Shinkai","sequence":"additional","affiliation":[{"name":"Koichi Shinkai, DDS, PhD, Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1188","reference":[{"issue":"1","key":"i1559-2863-48-5-575-b1","series-title":"Journal of Dentistry","first-page":"1","article-title":"Longevity of direct and indirect resin composite restorations in permanent posterior teeth: A systematic review and meta-analysis","volume":"54","year":"2016","unstructured":"da Veiga\n              AMA\n            , CunhaAC, FerreiraDMMTP, da Silva FidalgoTK, ChiancaTK, 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