中国组织工程研究

中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (30): 4805-4810.doi: 10.3969/j.issn.2095-4344.2017.30.009

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

不同含氟比例弹性义齿材料的力学性能比较

唐震宇1，张  哲2，张伟一3   

  1. 1桂林医学院第二附属医院，广西壮族自治区桂林市  541199；2桂林理工大学材料科学与工程学院，广西壮族自治区桂林市  541004；3桂林市口腔医院，广西壮族自治区桂林市  541004
  • 收稿日期:2017-09-07 出版日期:2017-10-28 发布日期:2017-11-07
  • 通讯作者: 唐震宇，桂林医学院第二附属医院，广西壮族自治区桂林市 541199
  • 作者简介:唐震宇，男，1975年生，广西壮族自治区桂林市人，硕士，硕士生导师，主任医师，教授，主要从事口腔基础与临床的研究工作。
  • 基金资助:
    广西科学研究与技术开发计划项目资助(桂科攻14124004-1-10)；广西桂林市科技攻关计划项目资助(20140120-8-1，2016012709)

A comparative study on the mechanical properties of flexible denture materials containing different fluoride concentrations

Tang Zhen-yu1, Zhang Zhe2, Zhang Wei-yi3 
  

  1. 1The Second Affiliated Hospital of Guilin Medical University, Guilin 541001, Guangxi Zhuang Autonomous Region, China; 2College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi Zhuang Autonomous Region, China; 3Guilin Stomatological Hospital, Guilin 541004, Guangxi Zhuang Autonomous Region, China
  • Received:2017-09-07 Online:2017-10-28 Published:2017-11-07
  • Contact: Tang Zhen-yu, the Second Affiliated Hospital of Guilin Medical University, Guilin 541001, Guangxi Zhuang Autonomous Region, China
  • About author:Tang Zhen-yu, Master, Master’s supervisor, Chief physician, Professor, the Second Affiliated Hospital of Guilin Medical University, Guilin 541001, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    the Science and Technology Research and Development Plan of Guangxi, No. 14124004-1-10; the Science and Technology Research Projects of Guangxi, No. 20140120-8-1, 2016012709

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被引次数

1

摘要：

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文题释义：
弹性义齿材料：是由聚碳酸脂尼龙类复合材料构成的高分子活性塑料，其弹性、韧性、抗折性能好，耐腐蚀，有良好的压力成形性，可耐260-290 ℃高温，体积稳定不变形，无毒无味且成本低廉，符合理想基托材料的要求。
抗拉强度：是指试件在被拉断前所承受的最大标称应力，是材料产生局部集中塑性变形的临界值，在仪器测试时得到的抗拉强度数值，反映的是材料在静拉伸力学条件下的最大承载能力，即为材料在一定载荷条件下拉伸达到断裂程度所承受的最大应力值。
弯曲强度：是指试件材料在不同弯曲负荷条件下，达到预定弯距或出现表面及深层的破裂时所承受的最大正应力值，可映射出材料在复杂应力下的真实性能。
 
背景：患者长期戴用弹性义齿修复体后，会增加龋病和牙周病、局部义齿性口炎等疾病的发病率。在材料中添加氟化物可预防和降低上述疾病的发病率，目前国内外在口腔材料中添加氟化物防龋的研究较多，但尚无在弹性义齿材料中添加单氟磷酸钠并进行相关力学性能测试研究的相关报道。
目的：评价不同含氟比例弹性义齿材料的力学性能。
方法：取弹性义齿材料，分别制成长80 mm、宽51 mm、厚1 mm，长20 mm、宽5 mm、厚5 mm，长25 mm、宽2 mm、厚2 mm尺寸，每种尺寸60个试件，每组尺寸内按照添加单氟磷酸钠的质量比再分为6组，单氟磷酸钠质量比分别为0(对照组)、3%、5%、10%、15%、20%，检测试件的扯断强度、弯曲强度及邵氏硬度。
结果与结论：随着弹性义齿材料中单氟磷酸钠质量比例的增加，材料的扯断强度、弯曲强度及邵氏硬度值逐渐降低，当弹性义齿材料中单氟磷酸钠质量比例增加至10%时，材料的扯断强度、弯曲强度及邵氏硬度与对照组相比虽有所降低，但差异无显著性意义(P > 0.05)；当弹性义齿材料中单氟磷酸钠质量比例达到15%时，材料的扯断强度、弯曲强度均低于对照组(P < 0.05)；当弹性义齿材料中单氟磷酸钠质量比例达到20%时，材料的扯断强度、弯曲强度、邵氏硬度均低于对照组(P < 0.05)。结果表明，单氟磷酸钠含量可影响弹性义齿材料的力学指标，10%是最佳加氟比例，高于此给氟量可改变弹性义齿材料的力学性能。

关键词: 生物材料, 口腔生物材料, 弹性义齿材料, 力学机械性能, 氟化物, 无机盐；防龋

Abstract:

BACKGROUND: Long-term use of flexible denture prosthesis will increase the incidence of caries and periodontal disease, and partial denture stomatitis. The addition of fluoride in the prosthesis material can prevent and reduce the incidence of these diseases. Currently, increasing research addresses the addition of fluoride into dental materials at home and abroad, but little is reported on the addition of sodium monofluorophosphate (Na2(PO3)F into flexible denture materials and on the relevant mechanical performance.
OBJECTIVE: To evaluate the mechanical properties of flexible denture materials containing different fluoride concentrations.
METHODS: Totally 180 elastic denture samples were made at the three different sizes of 80 mm×51 mm×1 mm (n=60), 20 mm×5 mm×5 mm (n=60), 25 mm×2 mm×2 mm (n=60). Then, elastic denture samples containing Na2(PO3)F 0 (control), 3%, 5%, 10%, 15%, 20% were prepared in each size groups. The tensile strength, flexural strength and Shore A hardness of the samples were tested.
RESULTS AND CONCLUSION: When the mass ratio of fluoride was up to 10%, the tensile strength and flexural strength reduced a little (P > 0.05). When the mass ratio of fluoride was up to 15%, the tensile strength and flexural strength were significantly lower than those of non-fluoride samples (P < 0.05). When the mass ratio of fluoride was up to 20%, the tensile strength, flexural strength and Shore A hardness were significantly lower than those of non-fluoride samples (P < 0.05). To conclude, Na2(PO3)F content has a significant effect on the tensile strength, flexural strength and Shore A hardness, and 10% is the best proportion of Na2(PO3)F. The mechanical properties of fluoride-containing flexible denture materials will be changed if the mass ratio of fluoride is higher than 10%.

Key words: Dentures, Fluorides, Tissue Engineering

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