四种核树脂冷热循环前后机械性能的比较
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摘要
目的通过体外冷热循环模拟老化核树脂材料,比较不同核树脂的机械性能。方法将A、B、C、D四种核树脂分别制备成25mm×2mm×2mm的6个棱柱状挠曲试样和高6mm,直径4mm的10个圆柱状抗压试样,通过万能试验机测试冷热循环前后试样的挠曲强度和抗压强度;用单因素方差分析和t检验进行统计分析。结果未冷热循环的四组核树脂挠曲强度值和抗压强度值差异均没有统计学意义。经过5000次冷热循环后,自制核树脂与三种成品核树脂相比较,在挠曲强度和抗压强度上差异均没有统计学意义。A、B、C三组核树脂挠曲强度和抗压强度在循环后均有显著下降(P<0.05)。结论自制核树脂的挠曲强度和抗压强度良好,冷热循环对核树脂材料的老化作用明显。
Objective To compare the flexural strength and compressive strength of different core buildup composite resins under thermal cycling. Methods Specimens for flexural and compressive strength test were made from four core buildup composite resins, respectively. The flexural and compressive strength of the samples were tested by universal testing machine. One-way ANOVA and T test were used for statistical analysis. Results There were no statistically significant differences in the flexural and compressive strength among the four buildup composite resins before and after 5000 times thermal cycling. The flexural and the compressive strength decreased significantly in group A,B and C after thermal cycling(P<0.05). Conclusion The customized novel core buildup composite resin had satisfactory flexural and the compressive strength which decreased after thermal cycling.
Objective To compare the flexural strength and compressive strength of different core buildup composite resins under thermal cycling. Methods Specimens for flexural and compressive strength test were made from four core buildup composite resins, respectively. The flexural and compressive strength of the samples were tested by universal testing machine. One-way ANOVA and T test were used for statistical analysis. Results There were no statistically significant differences in the flexural and compressive strength among the four buildup composite resins before and after 5000 times thermal cycling. The flexural and the compressive strength decreased significantly in group A,B and C after thermal cycling(P<0.05). Conclusion The customized novel core buildup composite resin had satisfactory flexural and the compressive strength which decreased after thermal cycling.
引文
1解昱,罗冬青.三种桩核系统修复后离体牙抗疲劳性实验.北京口腔医学,2014,22(4):211-213.
2董少杰,兰亭,孔婷婷,等.纯钛桩核及纤维桩核冠修复上颌中切牙薄壁残根后的有限元应力分析.西安交通大学学报(医学版),2017,38(2):299-303.
3王晓燕,邓旭亮,蔡晴.二氧化硅纳米纤维/微米颗粒复合填料对牙科树脂力学性能的影响.现代口腔医学杂志,2014,28(4):202-205.
4 Balos S,Pili c'B,Petronijevi c'B,et al.Improving mechanical properties of flowable dental composite resin by adding silica nanoparticles.Vojnosanit Pregl,2013,70(5):477-483.
5何薇,张振庭,刘亦然,等.自制桩核树脂机械性能的比较研究.北京口腔医学,2014,22(1):9-12.
6 Rüttermann S,Alberts I,Raab WH,et al.Physical properties of self-,dual-,and light-cured direct core materials.Clin Oral Investig,2011,15(4):597-603.
7陈治清,管利民.口腔粘接学.北京:北京医科大学中国协和医科大学联合出版社,1993.172-173.
8 Morresi AL,D'Amario M,Capogreco M,et al.Thermal cycling for restorative materials:does a standardized protocol exist in laboratory testing?A literature review.J Mech Behav Biomed Mater,2014,29(1):295-308.
9 Mair LH.Surface permeability and degradation of dental composites resulting from oral temperature changes.J Dent Mater,1989,5(4):247-255.
10 Gale MS,Darvell BW.Thermal cycling procedures for laboratory testing of dental restorations.J Dent,1999,27(2):89-99.
11孙皎.牙科复合树脂充填修复材料的现状与趋势分析.口腔材料器械杂志,2012,21(1):6-11.
12 Davy KW,Kalachandra S,Pandain MS,et al.Relationship between composite matrix molecular structure and properties.Biomaterials,1998,19(22):2007-2014.
13 Kalachandra S,Kusy RP.Comparison of water sorption by methacrylate and dimethacrylate monomers and their corresponding polymers.J Polymer 1991,32(13):2428-2434.
14 Ellakwa A,Cho N,Lee IB.The effect of resin matrix composition on the polymerization shrinkage and rheological properties of experimental dental composites.Dent Mater,2007,23(10):1229-1235.
15 Sideridou I,Achilias DS,Spyroudi C,et al.Water sorption characteristics of light-cured dental resins and composites based on Bis-EMA/PCDMA.Biomaterials,2004,25(2):367-376.
16 Cornelio RB,Wikant A,Mjsund H,et al.The influence of bisEMA vs bis GMA on the degree of conversion and water susceptibility of experimental composite materials.Acta Odontol Scand,2014,72(6):440-447.
17 Yang HS,Lang LA,Guckes AD,et al.The effect of thermal change on various dowel-and-core restorative materials.J Prosthet Dent,2001,86(1):74-80.
18奚廷斐,徐恒昌,王同.复合树脂填料的尺寸分布与磨损率的相关性-Ⅱ、加速老化试验.中国生物医学工程学,1985,4(4):249-254,258.
19 Shinkai K,Taira Y,Suzuki S,et al.In vitro wear of flowable resin composite for posterior restorations.Dent Mater J,2016,35(1):37-44.
2董少杰,兰亭,孔婷婷,等.纯钛桩核及纤维桩核冠修复上颌中切牙薄壁残根后的有限元应力分析.西安交通大学学报(医学版),2017,38(2):299-303.
3王晓燕,邓旭亮,蔡晴.二氧化硅纳米纤维/微米颗粒复合填料对牙科树脂力学性能的影响.现代口腔医学杂志,2014,28(4):202-205.
4 Balos S,Pili c'B,Petronijevi c'B,et al.Improving mechanical properties of flowable dental composite resin by adding silica nanoparticles.Vojnosanit Pregl,2013,70(5):477-483.
5何薇,张振庭,刘亦然,等.自制桩核树脂机械性能的比较研究.北京口腔医学,2014,22(1):9-12.
6 Rüttermann S,Alberts I,Raab WH,et al.Physical properties of self-,dual-,and light-cured direct core materials.Clin Oral Investig,2011,15(4):597-603.
7陈治清,管利民.口腔粘接学.北京:北京医科大学中国协和医科大学联合出版社,1993.172-173.
8 Morresi AL,D'Amario M,Capogreco M,et al.Thermal cycling for restorative materials:does a standardized protocol exist in laboratory testing?A literature review.J Mech Behav Biomed Mater,2014,29(1):295-308.
9 Mair LH.Surface permeability and degradation of dental composites resulting from oral temperature changes.J Dent Mater,1989,5(4):247-255.
10 Gale MS,Darvell BW.Thermal cycling procedures for laboratory testing of dental restorations.J Dent,1999,27(2):89-99.
11孙皎.牙科复合树脂充填修复材料的现状与趋势分析.口腔材料器械杂志,2012,21(1):6-11.
12 Davy KW,Kalachandra S,Pandain MS,et al.Relationship between composite matrix molecular structure and properties.Biomaterials,1998,19(22):2007-2014.
13 Kalachandra S,Kusy RP.Comparison of water sorption by methacrylate and dimethacrylate monomers and their corresponding polymers.J Polymer 1991,32(13):2428-2434.
14 Ellakwa A,Cho N,Lee IB.The effect of resin matrix composition on the polymerization shrinkage and rheological properties of experimental dental composites.Dent Mater,2007,23(10):1229-1235.
15 Sideridou I,Achilias DS,Spyroudi C,et al.Water sorption characteristics of light-cured dental resins and composites based on Bis-EMA/PCDMA.Biomaterials,2004,25(2):367-376.
16 Cornelio RB,Wikant A,Mjsund H,et al.The influence of bisEMA vs bis GMA on the degree of conversion and water susceptibility of experimental composite materials.Acta Odontol Scand,2014,72(6):440-447.
17 Yang HS,Lang LA,Guckes AD,et al.The effect of thermal change on various dowel-and-core restorative materials.J Prosthet Dent,2001,86(1):74-80.
18奚廷斐,徐恒昌,王同.复合树脂填料的尺寸分布与磨损率的相关性-Ⅱ、加速老化试验.中国生物医学工程学,1985,4(4):249-254,258.
19 Shinkai K,Taira Y,Suzuki S,et al.In vitro wear of flowable resin composite for posterior restorations.Dent Mater J,2016,35(1):37-44.