复合树脂高强纤维间隙保持器的应用研究*

Study on the application of the glass fiber–reinforced composite resin space maintainer*

摘要:

目的 评估复合树脂高强纤维（GFRCR）间隙保持器力学性能及临床应用疗效。方法 应用万能材料试验机测量GFRCR和带环丝圈式间隙保持器的最大抗剪切力值；临床选双侧下颌第二乳磨牙均缺失需要缺隙保持患儿43例，一侧用GFRCR间隙保持器（GFRCR组），对侧用带环丝圈式间隙保持器（带环丝圈组），观察比较两组临床操作时间和患者主观疼痛程度，以及配戴1、3、6和12个月后2种间隙保持器的成功率。结果 两组间隙保持器最大抗剪切力比较，差异无统计学意义（P?>0.05）；GFRCR组临床操作时间短于带环丝圈组（P?<0.05）；GFRCR组患者基本无疼痛，主观舒适程度优于带环丝圈组（P?<0.05）；第1、3和6个月配戴成功率两组差异无统计学意义（P?>0.05），12月配戴成功率比较，差异有统计学意义（P?<0.05），GFRCR组低于带环丝圈组。结论 2种间隙保持器具有可比拟的机械强度；GFRCR间隙保持器操作省时、简单、舒适、疼痛小、短期疗效优。

Abstract:

Objective To compare the mechanical properties and the clinical application of the glass fiber–reinforced composite resin (GFRCR) space maintainer with the band-and-loop space maintainer. Methods The maximum shear resistance of GFRCR space maintainer and traditional band-and-loop space maintainer was tested by universal material testing machine. 43 children with premature loss of bilateral mandibular deciduous second molars were included into this study. GFRCR space maintainers were used on one side and traditional band-and-loop space maintainers were adopted on the other side of the same participant. Clinical operation time, subjective comfort levels of patients were assessed. The success rate was further estimated 1, 3, 6 and 12 months after wearing retainers. Results There was no significant difference in maximum shear strength between these two space retainers (P?>?0.05); Clinical operation time was less and patient subjective comfort was better in GFRCR group than that of band-and-loop group (P?