中华口腔医学杂志
中華口腔醫學雜誌
중화구강의학잡지
Chinese Journal of Stomatology
2012年
5期
281-286
,共6页
撒悦%蒋滔%李碧莹%王浙君%王志辉%王贻宁
撒悅%蔣滔%李碧瑩%王浙君%王誌輝%王貽寧
살열%장도%리벽형%왕절군%왕지휘%왕이저
漂白%过氧化氢%牙釉质%过氧化脲
漂白%過氧化氫%牙釉質%過氧化脲
표백%과양화경%아유질%과양화뇨
Tooth bleaching agent%Hydrogen peroxide%Dental enamel%Carbamide peroxide
目的 研究3种不同质量分数的家用牙齿漂白剂对人牙釉质结构和力学性能的影响,为评价市售家用牙齿漂白剂的安全性提供依据.方法 将60块人牙釉质样本按随机数字化表法随机分至4组:10％过氧化脲组、15％过氧化脲组、20％过氧化脲组和蒸馏水对照组,每组15块.在漂白组样本表面涂布漂白剂并将其置于37℃恒温箱中,漂白8h后去净漂白剂,再将样本保存于蒸馏水中16 h；蒸馏水对照组不做漂白处理.如此循环14 d分别用原子力显微镜、衰减全反射红外测试仪、显微拉曼光谱仪、显微硬度仪检测各组漂白前后釉质表面形貌、化学结构及硬度、断裂韧性等力学特性.结果 3个漂白组的釉质与对照组相比没有出现表面形貌、均方根表面粗糙度(P=0.774)、红外光谱中v2 CO32-∶v1 v3 PO43-(P=0.263)和显微硬度(P=0.829)的明显变化；10％、15％、20％过氧化脲组相对拉曼强度漂白后相对于漂白前的百分比分别为(105.74±11.34)％、(104.46±8.83)％和(99.52±9.32)％,与对照组[(97.62±7.46)％]相比差异均无统计学意义(P=0.062)；但3个漂白组荧光背景强度漂白后相对于漂白前的百分比分别为(20.86±7.23)％、(22.14±7.34)％和(21.10±7.59)％,与对照组[(100.78±3.70)％]相比差异均有统计学意义(P＜0.001).同时,3个漂白组与对照组相比断裂韧性漂白后下降值差异亦有统计学意义(P =0.024、P=0.005、P=0.013).结论 在体外环境下,3种质量分数的家用牙齿漂白剂不会影响牙釉质中的无机物和显微硬度,但可能会造成牙釉质断裂韧性下降.
目的 研究3種不同質量分數的傢用牙齒漂白劑對人牙釉質結構和力學性能的影響,為評價市售傢用牙齒漂白劑的安全性提供依據.方法 將60塊人牙釉質樣本按隨機數字化錶法隨機分至4組:10％過氧化脲組、15％過氧化脲組、20％過氧化脲組和蒸餾水對照組,每組15塊.在漂白組樣本錶麵塗佈漂白劑併將其置于37℃恆溫箱中,漂白8h後去淨漂白劑,再將樣本保存于蒸餾水中16 h；蒸餾水對照組不做漂白處理.如此循環14 d分彆用原子力顯微鏡、衰減全反射紅外測試儀、顯微拉曼光譜儀、顯微硬度儀檢測各組漂白前後釉質錶麵形貌、化學結構及硬度、斷裂韌性等力學特性.結果 3箇漂白組的釉質與對照組相比沒有齣現錶麵形貌、均方根錶麵粗糙度(P=0.774)、紅外光譜中v2 CO32-∶v1 v3 PO43-(P=0.263)和顯微硬度(P=0.829)的明顯變化；10％、15％、20％過氧化脲組相對拉曼彊度漂白後相對于漂白前的百分比分彆為(105.74±11.34)％、(104.46±8.83)％和(99.52±9.32)％,與對照組[(97.62±7.46)％]相比差異均無統計學意義(P=0.062)；但3箇漂白組熒光揹景彊度漂白後相對于漂白前的百分比分彆為(20.86±7.23)％、(22.14±7.34)％和(21.10±7.59)％,與對照組[(100.78±3.70)％]相比差異均有統計學意義(P＜0.001).同時,3箇漂白組與對照組相比斷裂韌性漂白後下降值差異亦有統計學意義(P =0.024、P=0.005、P=0.013).結論 在體外環境下,3種質量分數的傢用牙齒漂白劑不會影響牙釉質中的無機物和顯微硬度,但可能會造成牙釉質斷裂韌性下降.
목적 연구3충불동질량분수적가용아치표백제대인아유질결구화역학성능적영향,위평개시수가용아치표백제적안전성제공의거.방법 장60괴인아유질양본안수궤수자화표법수궤분지4조:10％과양화뇨조、15％과양화뇨조、20％과양화뇨조화증류수대조조,매조15괴.재표백조양본표면도포표백제병장기치우37℃항온상중,표백8h후거정표백제,재장양본보존우증류수중16 h；증류수대조조불주표백처리.여차순배14 d분별용원자력현미경、쇠감전반사홍외측시의、현미랍만광보의、현미경도의검측각조표백전후유질표면형모、화학결구급경도、단렬인성등역학특성.결과 3개표백조적유질여대조조상비몰유출현표면형모、균방근표면조조도(P=0.774)、홍외광보중v2 CO32-∶v1 v3 PO43-(P=0.263)화현미경도(P=0.829)적명현변화；10％、15％、20％과양화뇨조상대랍만강도표백후상대우표백전적백분비분별위(105.74±11.34)％、(104.46±8.83)％화(99.52±9.32)％,여대조조[(97.62±7.46)％]상비차이균무통계학의의(P=0.062)；단3개표백조형광배경강도표백후상대우표백전적백분비분별위(20.86±7.23)％、(22.14±7.34)％화(21.10±7.59)％,여대조조[(100.78±3.70)％]상비차이균유통계학의의(P＜0.001).동시,3개표백조여대조조상비단렬인성표백후하강치차이역유통계학의의(P =0.024、P=0.005、P=0.013).결론 재체외배경하,3충질량분수적가용아치표백제불회영향아유질중적무궤물화현미경도,단가능회조성아유질단렬인성하강.
Objective To investigate the effects of three differently concentrated at-home bleaching agents on the structure and the structure-related mechanical properties of human enamel.Methods Sixty enamel specimens were randomly divided into four groups and treated with 10％ carbamide peroxide( CP),15％ CP,20％ CP and distilled water,respectively.The bleaching process was 8 h/day for 14 consecutive days.Baseline and final atomic force microcopy(AFM) surface detection,Raman spectroscopy,attenuated total reflectance-infrared spectroscopy(ATR-IR),microhardness and fracture toughness(FT) measurements were carried out before and after bleaching experiments. Results CP didn't change the morphology of enamel.Meanwhile,the three bleached groups and the control group had no significant difference in root mean square detection ( P=0.774),v2 CO3 2-:v1 v3 PO43- (P=0.263 ) and microhardness ( P =0.829 ).The percentage of relative Raman intensity in the three bleached groups and the control group were (105.74+11.34)％,(104.46 ±8.83)％,(99.52 ±9.32)％ and (97.62 ±7.46)％,respectively.There was no significant difference among them ( P=0.062 ). However,the percentage of laser-induced fluorescence in the three bleached groups and the control group were ( 20.86 + 7.23 ) ％,( 22.14 ±7.34) ％,( 21.10 ± 7.59 ) ％ and ( 100.78 ± 3.70 ) ％,respectively.There was significant difference between either of the bleached groups and the control group (P＜0.001). Moreover,FT declined significantly in the three groups( P=0.024,P=0.005,P=0.013) when compared with the control group.Conclusions Under in vitro condition,three differently concentrated at-home bleaching agents wouldn't induce the demineralizatiou and the decline of microhardness on enamel.However,the decrease of FT on enamel seemed to be inevitable after bleaching.
