氧化锆陶瓷的体外磨损性能研究
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摘要
目的:研究氧化锆陶瓷与牛牙釉质、铸瓷、饰瓷分别配副后的磨损特性。方法:将高度6 mm、直径3 mm的氧化锆陶瓷圆柱作为上颌磨头(上试样),分别与牛下颌牙釉质、二硅酸锂铸瓷、长石质饰瓷(下试样)组成3组摩擦副(n=6),并利用摩擦磨损试验机,在人工唾液、10 N载荷、转速100 r/min、回转半径2.5 mm、匀速圆周运动的条件下进行10万次循环磨损实验。磨损完成后,用三维形貌仪分别测量上颌和下颌试件的磨损高度损失量、体积损失量及表面粗糙度,并利用扫描电镜观察其磨损面的微观形貌。结果:各下颌试件的高度磨损量、体积磨损量和表面粗糙度均以牛牙釉质最低,铸瓷次之,饰瓷最高(P<0.05)。与之配副的氧化锆的上述各指标亦表现为牛牙釉质组最低,铸瓷组次之,饰瓷组最高(P<0.05)。微观形貌显示,牛牙釉质及其配副氧化锆的表面均相对光滑,铸瓷及其配副氧化锆磨损面呈现宽大犁沟状磨痕,饰瓷及其配副氧化锆磨损面表现为密集的犁沟状磨痕。结论:在模拟口腔环境下,与氧化锆配副的长石质饰瓷磨损量最高,二硅酸锂铸瓷次之,牛牙釉质磨损量最低。
AIM: To investigate the wear characteristics of zirconia ceramic paired with bovine enamel,hot-pressed ceramic and veneering porcelain respectively. METHODS: Cylindrical chairside zirconia ceramic specimens( 6 mm in length,3 mm in diameter) were randomly divided into 3 groups,bovine enamel specimens,lithium disilicate glass-ceramic specimens and feldspathic porcelain specimens were served as the antagonists( n = 6) respectively. The specimens were then loaded in a wear simulator with 10 N,100,000 cycles,in artificial saliva,at the speed of 100 r/min,turning radius of 2. 5 mm and in an uniform circular motion condition. Height loss,volume loss and surface roughness of the specimens were respectively measured with a 3D profilometer. SEM was applied to investigate the worn surfaces. RESULTS: Height loss and volume loss of bovine enamel wear were the lowest and veneering porcelain were the highest( P < 0. 05). Zirconia ceramic of the bovine enamel group also showed lower wear loss than hot-pressed ceramic,the veneering porcelain group showed the highest wear loss( P < 0. 05). SEM observation demonstrated that the bovine enamel group displayed relatively smooth surface; the wear surface of the hot-pressed ceramic group was broad furrow-like wear tracks; the veneering porcelain group showed intensive furrow-like wear tracks.CONCLUSION: The bovine enamel has stronger antiabradability,followed by the hot-pressed ceramic and the veneering porcelain.
AIM: To investigate the wear characteristics of zirconia ceramic paired with bovine enamel,hot-pressed ceramic and veneering porcelain respectively. METHODS: Cylindrical chairside zirconia ceramic specimens( 6 mm in length,3 mm in diameter) were randomly divided into 3 groups,bovine enamel specimens,lithium disilicate glass-ceramic specimens and feldspathic porcelain specimens were served as the antagonists( n = 6) respectively. The specimens were then loaded in a wear simulator with 10 N,100,000 cycles,in artificial saliva,at the speed of 100 r/min,turning radius of 2. 5 mm and in an uniform circular motion condition. Height loss,volume loss and surface roughness of the specimens were respectively measured with a 3D profilometer. SEM was applied to investigate the worn surfaces. RESULTS: Height loss and volume loss of bovine enamel wear were the lowest and veneering porcelain were the highest( P < 0. 05). Zirconia ceramic of the bovine enamel group also showed lower wear loss than hot-pressed ceramic,the veneering porcelain group showed the highest wear loss( P < 0. 05). SEM observation demonstrated that the bovine enamel group displayed relatively smooth surface; the wear surface of the hot-pressed ceramic group was broad furrow-like wear tracks; the veneering porcelain group showed intensive furrow-like wear tracks.CONCLUSION: The bovine enamel has stronger antiabradability,followed by the hot-pressed ceramic and the veneering porcelain.
引文
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[3]Miyazaki T,Nakamura T,Matsumura H,et al.Current status of zirconia restoration.[J].J Prosthodont Res,2013,57(4):236-261.
[4]张殿云,林红,郑睿,等.牛牙釉质硬度测量方法对结果评价的影响研究[J].生物医学工程学杂志,2013(1):116-120.
[5]Yilmaz ED,Jelitto H,Schneider GA.Uniaxial compressive behavior of micro-pillars of dental enamel characterized in multiple directions[J].Acta Biomaterialia,2015,16(1):187-195.
[6]张珍珍.二硅酸锂及白榴石基玻璃陶瓷在模拟咀嚼循环加载下的磨损性能研究[D].西安:第四军医大学,2015.
[7]伊远平.干湿环境与载荷对长石质饰瓷及氟磷灰石饰瓷磨损性能的影响[D].西安:第四军医大学,2015.
[8]Lambrechts P,Braem M,Vuylstekewauters M,et al.Quantitative in vivo wear of human enamel[J].J Dent Res,1989,68(12):1752-1754.
[9]Dds PC,Dds FPM,Dds NS,et al.Full-Arch,implant-supported monolithic zirconia rehabilitations:Pilot clinical evaluation of wear against natural or composite teeth[J].J Prosthodont,2015,25(8)629-633.
[10]Mormann WH,Stawarczyk B,Ender A,et al.Wear characteristics of current aesthetic dental restorative CAD/CAM materials:two-body wear,gloss retention,roughness and martens hardness[J].J Mech Behav Biomed Mater,2013,20:113-125.
[11]Zandparsa R,El HR,Hirayama H,et al.Effect of different dental ceramic systems on the wear of human enamel:An in vitro study[J].J Prosthet Dent,2016,115(2):230-237.
[12]Preis V,Grumser K,Schneider-Feyrer S,et al.Cycle-dependent in vitro wear performance of dental ceramics after clinical surface treatments[J].J Mech Behav Biomed Mater,2016,53:49-58.
[13]Preis V,Behr M,Handel G,et al.Wear performance of dental ceramics after grinding and polishing treatments.[J].J Mech Behav Biomed Mater,2012,10:13-22.
[14]Hara M,Takuma Y,Sato T,et al.Wear performance of bovine tooth enamel against translucent tetragonal zirconia polycrystalsafter different surface treatments[J].Dent Mater J,2014,33(6):811-817.
[15]Teruel Jde D,Alcolea A,Hernández A,et al.Comparison of chemical composition of enamel and dentine in human,bovine,porcine and ovine teeth[J].Arch Oral Biol,2015,60(5):768-775.
[16]Leyland A,Matthews A.On the significance of the H/E ratio in wear control:a nanocomposite coating approach to optimised tribological behaviour[J].Wear,2000,246(1-2):1-11.
[17]Theocharopoulos A,Chen X,Hill R,et al.Reduced wear of enamel with novel fine and nano-scale leucite glass-ceramics[J].J Dent,2013,41(6):561-568.
[18]Min J,Zhang Q,Qiu X,et al.Investigation on the tribological behavior and wear mechanism of five different veneering porcelains[J].Plos One,2015,10(9):e137566.