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J Periodontol:骨形成蛋白-2对犬牙周模型的垂直骨增长的作用研究

2017-05-28 lishiting MedSci原创

垂直骨增长(VBA)对众多牙周病科医师来讲一直是种挑战,并且效果无法预测。这篇研究的目的是在犬牙周模型中通过使用钛网屏障结合重组人骨形成蛋白(rhBMP)-2的方法,观察评估VBA的硬组织疗效,并与未使用rhBMP-2相比较。

垂直骨增长(VBA)对众多牙周病科医师来讲一直是种挑战,并且效果无法预测。这篇研究的目的是在犬牙周模型中通过使用钛网屏障结合重组人骨形成蛋白(rhBMP)-2的方法,观察评估VBA的硬组织疗效,并与未使用rhBMP-2相比较。

实验使用11条雄性比格犬作为研究对象,并且通过实验性牙槽嵴缺失来模拟临床牙槽嵴萎缩。VBA是通过对实验动物使用钛网和异体植入物进行引导性骨再生手术(GBR)得以实现。在实验侧下颌骨中,rhBMP-2/ACS于手术前与异体植入物相混合,并应用缓冲剂作为空白对照。在4个月的治愈期满后安乐死实验动物。临床和X线检测评估牙槽嵴尺寸的变化。另外,样本也进行micro-CT(?-CT)检验和组织学分析。

结果显示,在添加rhBMP-2的11个实验部位中有5个存在膜暴露(45.5%),而在未添加rhBMP-2的11个对照部位中有9个出现膜暴露(81.8%)。经过4个月的康复,与对照组相比较,添加rhBMP-2的牙周X线显示有更好的骨密度,缺失处有更好的填充,以及在牙槽嵴高度上有更多更显著的骨增长(p<0.05)。实验侧下颌骨展现出较低的膜暴露率,以及在72%牙周处的钛网上存在显著的异位骨形成。?-CT结果也显示,对照组展现出较少的垂直骨增长和较低的骨矿化密度趋势(p>0.05)。光学显微镜观察发现,占优势的板层状结构存在于添加rhBMP-2的牙周样本中。

结论:由于犬模型所固有的局限性和复杂外科手术技术的影响,此次研究结果表明,与未添加rhBMP-2植入物的牙周相比较,在使用钛网屏障的复合移植术中添加rhBMP-2可以增加垂直骨增长并伴随异位骨形成。

原始出处:

Hsu YT, Al-Hezaimi K, et al. Effects of Bone Morphogenetic Protein-2 on Vertical Bone Augmentation in a Canine Model. J Periodontol. 2017 May 26:1-18. doi: 10.1902/jop.2017.160516.

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    2018-03-04 feather89
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    2017-05-29 187****0626

    以后是不是可以不掉牙了

    0

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