不同厚度热压膜材料厚度稳定性的研究

Study on the thickness-change of different thickness thermoplastic materials after thermoforming and saliva immersion

目的测量并比较不同厚度的热压膜材料在不同处理方式下厚度变化的趋势,为临床选用适宜厚度的热压膜材料制作无托槽隐形矫治器提供一定的参考。方法选用厚度为1.0、0.75、0.5mm的Biolon膜片,应用电子游标卡尺测量并比较3种厚度的热压膜材料在未处理时,热成形后以及人工唾液浸泡2周后的厚度。所得数据应用SPSS10.0软件包进行两个独立样本的秩和检验。比较不同处理方式对材料厚度变化的影响以及处理方式对材料厚度的影响与材料初始厚度的关系。结果3种厚度的材料经过热成形处理后,厚度变薄。其中Biolon0.75mm的膜片厚度平均减少了0.14mm、Biolon 1.0mm的膜片厚度平均减少了0.22mm、Biolon 0.5mm的膜片厚度平均减少了0.14mm。经过人工唾液浸泡2周后,厚度与热成形后相比变厚。其中Biolon 0.75mm的膜片厚度平均增加了0.02mm、Biolon 1.0mm的膜片厚度平均增加了0.03mm、Biolon 0.5mm的膜片厚度平均增加了0.02mm。结论不同的处理方式对材料厚度的影响不同,其影响的效果与材料最初的厚度有关系。通过以上研究可以看出,Biolon 0.75mm膜片在厚度的稳定性上似乎比同种品牌中其他厚度的膜片具有一定的优势。

Objective To survey and compare the thickness-change of different thickness thermoplastic materials under different test condition and make sure the relationship between the thickness-change and the material initial thickness in order to provide a guide in selecting the suitable thickness thermoplastic in practice.Methods To choose Biolon,the thickness include 1.0 mm,0.75 mm,0.5 mm.Used Electron Vernier caliper to measure the thickness-change of different thickness thermoplastic materials under different processing mode.The data was analyzed by SPSS 10.0.Results After thermoforming the thickness of thermoplastic became thinner,the thickness of Biolon 0.75 mm decreased by 0.14 mm,Biolon 1.0 mm decreased by 0.22 mm and Biolon 0.5 mm decreased by 0.14 mm.After saliva immersion the thickness became thicker.The thickness of Biolon 0.75 mm increased by 0.02 mm,Biolon 1.0 mm increased by 0.03 mm and Biolon 0.5 mm increased by 0.02 mm.Conclusion 1）The influence of different processing mode to the thickness-change had relation to the material initial thickness.2）The Biolon 0.75 mm had certain superiority in thickness stability compared to the homogeneous brand through the above research.