Surface Properties of Resin Composites and CAD/CAM Blocks After Simulated Toothbrushing.

IF 1.4 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Operative dentistry Pub Date : 2023-09-01 DOI:10.2341/22-123-L

M Suzuki, Y Miyano, F Sato, K Shinkai

{"title":"Surface Properties of Resin Composites and CAD/CAM Blocks After Simulated Toothbrushing.","authors":"M Suzuki, Y Miyano, F Sato, K Shinkai","doi":"10.2341/22-123-L","DOIUrl":null,"url":null,"abstract":"Objectives: This study aimed to evaluate the surface gloss, surface roughness, and color change of restorative materials after a three-body wear abrasion.Methods and materials: Four resin composites with different filler particle size (Gracefil Flo [GFF, 0.7 μm], Gracefil LoFlo [GFL, 0.25 μm], Gracefil ZeroFlo [GFZ, 0.15 μm], and Gracefil Putty [GFP, 0.3 μm]), two CAD/CAM resin composite blocks with different filler particle size (Cerasmart 300 [CS3, 0.7 μm] and Cerasmart Prime [CSP, 0.3 μm], 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, μm), and color (L*, a*, and b* values) before toothbrushing and at every 20,000 strokes. Color differences (ΔL*, Δa*, Δb*, and ΔE00) 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).Results: 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 ΔE00 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.Conclusions: 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.","PeriodicalId":19502,"journal":{"name":"Operative dentistry","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Operative dentistry","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.2341/22-123-L","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}

引用次数: 0

Abstract

Objectives: This study aimed to evaluate the surface gloss, surface roughness, and color change of restorative materials after a three-body wear abrasion.

Methods and materials: Four resin composites with different filler particle size (Gracefil Flo [GFF, 0.7 μm], Gracefil LoFlo [GFL, 0.25 μm], Gracefil ZeroFlo [GFZ, 0.15 μm], and Gracefil Putty [GFP, 0.3 μm]), two CAD/CAM resin composite blocks with different filler particle size (Cerasmart 300 [CS3, 0.7 μm] and Cerasmart Prime [CSP, 0.3 μm], 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, μm), and color (L*, a*, and b* values) before toothbrushing and at every 20,000 strokes. Color differences (ΔL*, Δa*, Δb*, and ΔE00) 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).

Results: 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 ΔE00 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.

Conclusions: 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.

查看原文本刊更多论文

模拟刷牙后树脂复合材料和CAD/CAM块的表面特性

目的:评价修复材料在三体磨损后的表面光泽度、表面粗糙度和颜色变化。方法与材料:研究了4种不同填料粒径的树脂复合材料(Gracefil Flo [GFF, 0.7 μm]、Gracefil LoFlo [GFL, 0.25 μm]、Gracefil ZeroFlo [GFZ, 0.15 μm]、Gracefil Putty [GFP, 0.3 μm])、2种不同填料粒径的CAD/CAM树脂复合材料块(Cerasmart 300 [CS3, 0.7 μm]和Cerasmart Prime [CSP, 0.3 μm]， GC)和1种CAD/CAM玻璃陶瓷块(Initial LiSi block [ILS]， GC)作为对照。从每种材料中获得20个板形试样。10个样品进行80,000次刷牙，并在刷牙前和每20,000次刷牙时测量表面光泽(光泽单位，GU)，表面粗糙度(Ra， μm)和颜色(L*， a*和b*值)。计算刷牙前后的色差(ΔL*、Δa*、Δb*、ΔE00)。经过80,000次冲程后，使用扫描电子显微镜观察磨损表面。另外10个试样进行维氏显微硬度(VHN)测定。结果:8万次刷牙后，平均GU值为60.43 ~ 16.12 (ILS最高，GFL最低)，平均Ra值为0.079 ~ 4.085 (ILS最低，GFL最高)。在所有测量阶段，所有材料的ΔE00计算值范围为0.31至0.92。平均VHN为632.34 ~ 39.08 (ILS最高，GFZ最低)。与其他树脂复合材料(GFL、GFZ和GFP)相比，含有最大填充颗粒(GFF)的树脂复合材料Ra明显降低，VHN显著提高。含有较小填充颗粒(CSP)的CAD/CAM树脂复合块体的GU明显高于含有较大填充颗粒(CS3)的CAD/CAM树脂复合块体。GU与Ra呈负相关。结论:基于研究结果，牙刷磨损导致所有树脂基材料的GU下降和Ra增加。填料尺寸越大的树脂基材料Ra越低，而填料尺寸越小的树脂基材料GU的降低幅度越小。光固化树脂复合材料比用于CAD/CAM的树脂复合块更明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Operative dentistry 医学-牙科与口腔外科

CiteScore

4.00

自引率

9.10%

发文量

124

审稿时长

6-12 weeks

期刊介绍： Operative Dentistry is a refereed, international journal published bi-monthly and distributed to subscribers in over 50 countries. In 2012, we printed 84 articles (672 pages). Papers were submitted by authors from 45 countries, in the categories of Clinical Research, Laboratory Research, Clinical Techniques/Case Presentations and Invited Papers, as well as Editorials and Abstracts. One of the strong points of our journal is that our current publication time for accepted manuscripts is 4 to 6 months from the date of submission. Clinical Techniques/Case Presentations have a very quick turnaround time, which allows for very rapid publication of clinical based concepts. We also provide color for those papers that would benefit from its use. The journal does not accept any advertising but you will find postings for faculty positions. Additionally, the journal also does not rent, sell or otherwise allow its subscriber list to be used by any other entity