上海交通大学学报（医学版）
上海交通大學學報（醫學版）
상해교통대학학보（의학판）
JOURNAL OF SHANGHAI JIAOTONG UNIVERSITY(MEDICAL SCIENCE)
2009年
6期
656-659
,共4页
硅橡胶%撕裂强度%拉伸强度%扯断伸长率%邵氏硬度
硅橡膠%撕裂彊度%拉伸彊度%扯斷伸長率%邵氏硬度
규상효%시렬강도%랍신강도%차단신장솔%소씨경도
silicone elastomers%tear strength%tensile strength%elongation at break%hardness
目的 研究赝复用液态双组分SEI硅橡胶老化处理前后的机械性能变化,探讨其临床应用价值.方法 按国家标准,对液态双组分SEI硅橡胶和国际通用的A-2186硅橡胶分别进行热空气加速老化24、48和72 h,检测两种硅橡胶材料在常态和经老化处理后不同时间点的撕裂强度、拉伸强度、扯断伸长率和硬度等机械性能指标,同时进行统计学比较和分析.结果 常态下,在材料撕裂强度、拉伸强度和扯断伸长率方面,A-2186硅橡胶均较SEI硅橡胶的对应值大(P<0.05);而SEI硅橡胶的硬度比A-2186更具优势(P<0.05).随老化处理及时间的延长,A-2186和SEI硅橡胶的撕裂强度、拉伸强度和扯断伸长率均降低,而两者的硬度均增加,两种材料的总体机械性能均明显降低(P<0.05),其中A-2186硅橡胶老化后的撕裂强度和拉伸强度均优于SEI硅橡胶,而后者的硬度保持率较高.结论 与国际通用的A-2186硅橡胶比较,SEI硅橡胶的撕裂强度和拉伸强度尚有待提高;但其在硬度方面的抗老化优势明显,可考虑应用于软组织部位缺损的修复.
目的 研究贗複用液態雙組分SEI硅橡膠老化處理前後的機械性能變化,探討其臨床應用價值.方法 按國傢標準,對液態雙組分SEI硅橡膠和國際通用的A-2186硅橡膠分彆進行熱空氣加速老化24、48和72 h,檢測兩種硅橡膠材料在常態和經老化處理後不同時間點的撕裂彊度、拉伸彊度、扯斷伸長率和硬度等機械性能指標,同時進行統計學比較和分析.結果 常態下,在材料撕裂彊度、拉伸彊度和扯斷伸長率方麵,A-2186硅橡膠均較SEI硅橡膠的對應值大(P<0.05);而SEI硅橡膠的硬度比A-2186更具優勢(P<0.05).隨老化處理及時間的延長,A-2186和SEI硅橡膠的撕裂彊度、拉伸彊度和扯斷伸長率均降低,而兩者的硬度均增加,兩種材料的總體機械性能均明顯降低(P<0.05),其中A-2186硅橡膠老化後的撕裂彊度和拉伸彊度均優于SEI硅橡膠,而後者的硬度保持率較高.結論 與國際通用的A-2186硅橡膠比較,SEI硅橡膠的撕裂彊度和拉伸彊度尚有待提高;但其在硬度方麵的抗老化優勢明顯,可攷慮應用于軟組織部位缺損的脩複.
목적 연구안복용액태쌍조분SEI규상효노화처리전후적궤계성능변화,탐토기림상응용개치.방법 안국가표준,대액태쌍조분SEI규상효화국제통용적A-2186규상효분별진행열공기가속노화24、48화72 h,검측량충규상효재료재상태화경노화처리후불동시간점적시렬강도、랍신강도、차단신장솔화경도등궤계성능지표,동시진행통계학비교화분석.결과 상태하,재재료시렬강도、랍신강도화차단신장솔방면,A-2186규상효균교SEI규상효적대응치대(P<0.05);이SEI규상효적경도비A-2186경구우세(P<0.05).수노화처리급시간적연장,A-2186화SEI규상효적시렬강도、랍신강도화차단신장솔균강저,이량자적경도균증가,량충재료적총체궤계성능균명현강저(P<0.05),기중A-2186규상효노화후적시렬강도화랍신강도균우우SEI규상효,이후자적경도보지솔교고.결론 여국제통용적A-2186규상효비교,SEI규상효적시렬강도화랍신강도상유대제고;단기재경도방면적항노화우세명현,가고필응용우연조직부위결손적수복.
Objective To evaluate the mechanical properties of SEI silicone for maxillofacial prosthesis before and after heat aging and explore its clinical value. Methods Two kinds of silicones, SEI and A-2186, were performed heat aging for 24, 48 and 72 h. The parameters of tear strength, tensile strength, elongation at break and hardness of them were detected under ordinary state and at different time points after heat aging. Statistic comparison and analysis were conducted. Results Tear strength, tensile strength and elongation at break of A-2186 silicone were more favorable than those of SEI silicone under ordinary state, while the parameter of hardness was an exception (P < 0.05). After heat aging and with time progress, tear strength, tensile strength and elongation at break significantly decreased and hardness significantly increased for both A-2186 silicone and SEI silicone (P < 0.05). After heat aging, tear strength and tensile strength of A-2186 silicone were more favorable than those of SEI silicone, while the latter had a minor change in hardness. Conclusion Compared with the worldwide commonly used A-2186 silicone, there is room for improvement in tear strength and tensile strength for SEI silicone. Given the favorable property of minor change in hardness after heat aging, SEI can be used as a prosthetic material for facial soft tissue defect.
