固化方式对树脂水门汀氧阻聚层形成的影响

doi:10.19723/j.issn.1671-167X.2020.06.022

摘要/Abstract

摘要：

目的:探究树脂水门汀固化表面氧阻聚层内的树脂单体转化和无机成分变化规律。方法:选择3类树脂水门汀按照固化方式分为3组:(1)光固化组:RelyX Veneer、NX3(光固化型)、Variolink N;(2)双重固化组:RelyX U200 Automix、NX3(双重固化型)、Multilink Speed;(3)化学固化组:即双重固化组树脂水门汀按说明书不光照,自行暗固化。每组试样均设置有、无氧暴露的两个匹配表面,分别固化,同时光固化组和双重固化组还设置光强和光照时间变量。用扫描电镜观察试样固化后表面形貌,用能谱分析仪分析其表面元素构成。采用共聚焦显微拉曼光谱仪测量试样单体转化率,计算氧阻聚层厚度。结果:(1)有氧样本表面的氧元素质量百分比显著大于无氧样本(P<0.05), 无机元素质量百分比也显著小于无氧样本(P<0.05);(2)样本表面单体转化率有氧面均显著小于无氧面(P<0.05), 化学固化组的表面单体转化率最低(P<0.05),双重固化组最高(P<0.05),随着光照强度或时间的增加,可使各组表面单体转化率提高(P<0.05);(3)化学固化组的氧阻聚层厚度最厚为(40.27±2.81) μm,双重固化组最薄为(21.87±5.42) μm,光固化组介于两者之间为(23.73±3.84) μm,组间差异有统计学意义(P<0.05)。随着光照强度或光照时间增加,树脂水门汀氧阻聚层厚度降低(P<0.05)。结论:树脂水门汀有氧固化后,表面均会出现氧阻聚层,表现为无机填料少、单体转化率低;氧阻聚层厚度及表面单体转化率受固化方式及光照因素影响。

关键词: 树脂水门汀, 氧阻聚层, 单体转化率

Abstract:

Objective: To explore the conversion of resin monomer, the change of inorganic component and the influencing factors on the oxygen inhibition layer formed on the cured surface of resin cement. Methods: Three kinds of resin cement were divided into three groups: (1) light-cured group: RelyX Veneer, NX3 (light-cured), Variolink N; (2) dual-cured group: RelyX U200 Automix, NX3 (dual-cured), Multilink Speed; (3) chemically-cured group, and the above 3 types of dual-cured resin cement cured without illumination could be used as chemically-cured resin cement. Each sample was provided with and without oxygen exposure of two matching surfaces, cured respectively, and the variables of light intensity and illumination time were set in the light-cured group and the dual-cured group. Scanning electron microscopy was used to observe the samples’ surface morphology. Energy dispersive spectrometer was used to analyze the samples’ composition of surface elements. Confocal Raman spectroscopy was used to measure the monomer conversion of resin cement and to obtain the thickness of the oxygen inhibition layer. Results: (1) On the surface of cured resin cement, the weight percentage of oxygen element in the aerobic side was higher than that in the anaerobic side (P<0.05), and the weight percentage of inorganic element was lower than that in the anaerobic side (P<0.05). (2) The surface monomer conversion of the cured resin cement on the aerobic surface was significantly lower than that on the anaerobic surface (P<0.05), and the surface monomer conversion on the aerobic surface and the anaerobic surface was the lowest in the chemically-cured group (P<0.05), the dual-cured group was the highest (P<0.05), and the light-cured group was between them. With the increase of light intensity or illumination time, the surface monomer conversion increased (P<0.05). (3) The thickness of the oxygen inhibition layer was the thickest in the chemically-cured group [(40.27±2.81) μm](P<0.05), the thinnest in the dual-cured group [(21.87±5.42) μm](P<0.05) and light-cured group [(23.73±3.84) μm] was between them. With the increase of light intensity or illumination time, the thickness of the oxygen inhibition layer of resin cement decreased (P<0.05). Conclusion: When resin cement is exposed to oxygen, it will form an oxygen inhibition layer, its surface’s inorganic filler is less, the surface monomer conversion is lower. The surface monomer conversion and the thickness of oxygen inhibition layer are affected by curing mode and illumination factors.

Key words: Resin cement, Oxygen inhibition layer, Monomer conversion

中图分类号:

R783.1

陈文新,包旭东,岳林. 固化方式对树脂水门汀氧阻聚层形成的影响[J]. 北京大学学报（医学版）, 2020, 52(6): 1117-1123.

Wen-xin CHEN,Xu-dong BAO,Lin YUE. Curing method affecting the formation of oxygen inhibition layer on the surface of resin cement[J]. Journal of Peking University (Health Sciences), 2020, 52(6): 1117-1123.

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Curing method	Resin cement	Aerobic surface/%	Anaerobic surface/%	t	P
Light-cured	RelyX Veneer	48.80±1.31	72.96±1.94	21.332	<0.001
	NX3	49.36±3.96	68.69±3.68	7.589	<0.001
	Variolink N	51.25±2.44	65.07±3.14	7.021	<0.001
Dual-cured	RelyX U200 Automix	56.68±2.49	75.64±2.05	11.036	<0.001
	NX3	56.38±2.11	74.58±4.24	8.328	<0.001
	Multilink Speed	49.96±4.19	71.82±3.08	7.758	<0.001
Chemically-cured	RelyX U200 Automix	45.65±1.69	65.22±2.43	13.613	<0.001
	NX3	46.96±3.93	63.93±2.45	6.632	<0.001
	Multilink Speed	41.85±1.74	67.71±3.12	15.437	<0.001

Items	10 s	20 s	40 s	60 s	F	P
800 mW/cm²	39.62±3.01	42.74±2.75	43.19±0.93	46.21±2.36	10.887	0.001
1 000 mW/cm²	47.80±5.16	48.95±1.85	47.46±1.48	47.97±2.28	0.356	0.786
1 200 mW/cm²	48.29±1.40	48.80±1.31	47.72±0.67	48.49±4.31	0.722	0.553
F	15.002	17.052	0.049	1.740
P	<0.001	<0.001	0.952	0.217

Items	10 s	20 s	40 s	60 s	F	P
800 mW/cm²	51.28±1.87	52.36±1.11	52.08±2.74	58.06±1.79	12.523	<0.001
1 000 mW/cm²	58.15±1.54	57.88±2.92	58.13±1.51	57.23±1.14	0.256	0.856
1 200 mW/cm²	57.81±1.96	56.68±2.49	59.95±1.66	59.88±3.68	1.970	0.159
F	34.699	7.937	20.345	1.527
P	<0.001	0.006	<0.001	0.257

Items	10 s	20 s	40 s	60 s	F	P
800 mW/cm²	31.20±1.79	26.40±2.19	26.40±3.58	19.20±1.79	8.917	<0.001
1 000 mW/cm²	23.20±1.79	22.40±1.79	24.80±1.79	19.20±1.79	7.704	0.002
1 200 mW/cm²	21.60±2.19	20.80±3.35	20.80±1.79	17.60±2.19	2.622	0.086
F	35.429	6.167	6.500	1.143
P	<0.001	0.014	0.012	0.351

Items	10 s	20 s	40 s	60 s	F	P
800 mW/cm²	26.40±2.19	24.80±1.79	23.2±1.79	19.2±3.35	8.524	<0.001
1 000 mW/cm²	20.80±1.79	19.20±5.22	20.00±2.83	19.20±3.35	0.237	0.870
1 200 mW/cm²	20.00±2.83	17.60±2.19	17.60±2.19	17.60±2.19	0.471	0.636
F	11.400	6.091	7.400	1.286
P	0.002	0.015	0.008	0.313