实验兔面部提升模型的建立及可吸收软组织拉提整形带的应用
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1."浙江省生物可降解医用材料工程技术研究中心项目"(计划编号:2011E10021)资助;2.浙江中医药大学比较医学创新团队(XTD201301)。


Establishment of a rabbit model of facial skin lifting and application of the absorbable soft tissue plastic belt
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    摘要:

    目的 建立实验兔面部提升模型,并进一步评估可吸收软组织拉提整形带(整形带)对皮肤的提升作用,为整形带的临床应用提供实验依据。方法 取36只日本大耳白兔随机分成模型对照组(6只)和整形带提升组(30只),均采用面部皮肤切除术制作面部皮肤提升模型,其中整形带提升组面部皮肤切除术后植入整形带,而模型对照组仅行面部皮肤切除提升术;术后观察4周内各组实验兔的一般情况、皮肤提升效果以及植入后整形带的性能分析和皮下组织病理变化。结果 术后各兔在3~7 d内皮肤创口愈合,未见感染发生,植入4周期间未见整形带移位或断裂,仅见二组齿孔周边有局部发白;与模型对照组比,整形带提升组MA和MB距离均显著降低(P<0.01),但整形带在面部皮肤提升模型兔体内的生物学拉力随植入时间延长而有显著增加(P<0.01),4周时生物学拉力达到18.62 N;另外,植入后整形带二组齿和板抗张强度在植入4周时降低显著(P<0.01),且二组齿和板抗张力强度分别保持在35.07 N和53.31 N,同时二组齿/板抗张强度比值在植入4周期间均保持恒定(P>0.05);此外,整形带的重均分子量(Mw)、峰值分子量(Mp)、Z均分子量(Mz)和粘度均有随植入时间的延长而逐渐降低(P<0.01);并且其分散度Mz/Mw比值亦在植入2周后开始逐渐显著降低(P<0.01),并且皮下植入整形带后无明显病理改变。结论 本研究已成功建立了实验兔面部皮肤提升模型,整形带能明显提升皮肤筋膜系统,并在体内完整维持4周以上,可适用于临床衰老性损容病症的面部软组织拉提整形除皱。

    Abstract:

    Objective To establish a rabbit model of facial skin lifting and to evaluate the skin lifting effects of absorbable soft tissue plastic belt, and to provide experimental basis for clinical application of this plastic belt. Methods 36 Japanese white rabbits were randomly divided into model control group(n=6) and plastic belt lifting group(n=30). The model control group received only facial skin resection surgery, while the plastic belt lifting group had facial skin resection and plastic belt implantation. The changes of rabbit general status, skin lifting effects, performance of plastic belt and pathological changes of subcutaneous tissue after implantation were determined during the 4 weeks after surgery. Results The rabbit skin wound was healed within 3-7 days after surgery without infection. Meanwhile, the plastic belts did not show shifting or rupture, and only whitening around the perforations was observed in the two groups. Compared with the model control group, the MA and MB distances in the plastic belt lifting group were significantly lower(P<0.01), while the biological tension of plastic belts in the facial skin lifting rabbit models was significantly increased with the extension of time after implantation(P<0.01), and the biological tension was 18.62 N at 4 weeks after transplantation. In addition, the tensile intensities of perforations and plate in the two groups were significantly reduced at 4 weeks postoperatively(P<0.01), the tensile intensity of perforations and plate in the two groups were maintained at 35.07 N and 53.31 N, respectively, and the perforations/plate tensile intensity ratio of the two groups remained unchanged during 4 weeks after transplantation(P>0.05). Moreover, the molecular weight(Mw), peak molecular weight(Mp), Z molecular weight(Mz) and viscosity were gradually decreased along with the time passing after implantation(P<0.01), and its dispersion Mz/Mw ratio was also gradually decreased from 2 weeks after implantation(P<0.01), and no obvious pathological changes were found after subcutaneous implantation of the plastic belts. Conclusions We have successfully established a facial skin lifting rabbit model, and the plastic belt can obviously lift the facial skin fascia system and keep intact more than 4 weeks in the body. Therefore, this plastic belt can be applied for anti-wrinkle facial soft tissue lifting against the skin damage caused by aging.

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吴兴,潘永明,胡飞,余芾琼,刘军平,华菲,吴侃,陈献花,庞秀炳,陈民利.实验兔面部提升模型的建立及可吸收软组织拉提整形带的应用[J].中国比较医学杂志,2015,25(12):26~31.

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  • 最后修改日期:2015-09-30
  • 在线发布日期: 2015-12-30
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