J Periodontal Res:种植体周围的含髓鞘神经纤维:组织学研究

2020-04-11 lishiting MedSci原创

虽然多种口腔种植体治疗方案所引发的骨整合已得到学者们的广泛研究,但是很少有报道关注神经组织学的整合变化。这篇研究的主要目的是为了比较多种种植策略引发的种植体周围骨组织含髓鞘神经纤维的密度差异。

虽然多种口腔种植体治疗方案所引发的骨整合已得到学者们的广泛研究,但是很少有报道关注神经组织学的整合变化。这篇研究的主要目的是为了比较多种种植策略引发的种植体周围骨组织含髓鞘神经纤维的密度差异。

研究使用10只比格犬通过6种种植策略将68个商品化的纯钛种植体随机植入双侧下颌前磨牙和磨牙区域,随后拔除。6种策略分别为:(a)即刻种植(IIP)和即刻负载(IL); (b) IIP和延迟负载(DL); (c) IIP和未负载(UL); (d)延期种植(DIP)和IL; (e) DIP和DL; (f) DIP和UL。在种植体周围300 μm的区域以及在种植体的颈环、根中和根尖区域,通过组织形态分析观察种植体周围的含髓鞘神经纤维。跟踪评估包括每种种植策略术后3个月以及IIP+IL和IIP+DL策略术后6个月的纵向观察。

结果显示,研究通过linear mixed model检测不同治疗策略的影响,包括:种植体组(IIP+IL, IIP+DL, IIP+UL, DIP+IL, DIP+DL, DIP+UL)和区域(cervical, middle, apical)的固定效应。与IIP+UL和DIP+UL组相比,IIP+IL组含髓鞘神经纤维密度显著增高。在根尖区域的种植体周围神经恢复明显高于颈环区域(P = .002)。在即刻种植后,IL组含髓鞘神经纤维的密度显著高于DL组(P = .03)。在追踪评估中,没有观察到术后3-6个月的时间对神经密度存在显着影响(P = .19)。

结论:即刻种植和负载策略展现出对根尖区域种植体周围含髓鞘神经纤维分布密度的最有益作用。较长的负载时间对种植体周围神经的密度无明显影响。

原始出处:

Dandan Song, Xin Liang, et al. Peri-implant Myelinated Nerve Fibers: Histological Findings in Dogs. J Periodontal Res., 2020 Mar 10[Online ahead of print]

 

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    2020-04-28 feather89
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    2020-11-21 huangdf
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