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J Endod:人年轻发育成熟与未成熟前磨牙根部牙本质中TGF-β1的分布和含量分析

2020-03-10 lishiting MedSci原创

TGF-β1是再生牙髓中重要的一种形态发生素;然而,它在牙本质硬组织中的定位以及它在成熟牙根中的有效性还不完全清楚。

TGF-β1是再生牙髓中重要的一种形态发生素;然而,它在牙本质硬组织中的定位以及它在成熟牙根中的有效性还不完全清楚。

研究从13名年龄为17 ± 1和12 ± 1岁患者中获取因正畸拔除完整前磨牙的年轻发育成熟(n = 8)和未发育成熟牙根(n = 11)。牙根使用5%次氯酸钠溶液清洗干净。采用数字显微镜测量根尖孔的宽度。通过免疫染色和激光共聚焦显微镜观察每组3个牙根中TGF-β1的分布。将剩余13个牙根的根部牙本质研磨至粉末并使用17% EDTA进行脱钙,随后通过酶联免疫吸附测定检测硬组织中TGF-β1的整体水平。采用Student t检验对数据进行组间比较(α = .05)。

结果显示,发育成熟牙根的根尖孔与未发育成熟牙根根尖孔的大小比为168 ± 49 μm versus 557 ± 295 μm (P < .05)。2组中,髓腔中均存在TGF-β1的高染色。染色清晰存在于管周牙本质,而在非管状外层牙本质中无明显染色。发育成熟和未发育成熟牙根牙本质中TGF-β1的含量分别为115 ± 31 pg和74 ± 35 pg/100 mg (P > .05)。

结论:TGF-β1沉积于管周牙本质内。当年轻发育成熟以及未发育成熟牙根实施牙髓再生治疗时,根部牙本质很可能会释放这个分子。

原始出处:

Ivica A, Deari S, et al. Transforming Growth Factor Beta 1 Distribution and Content in the Root Dentin of Young Mature and Immature Human Premolars. J Endod. 2020 Mar 2. pii: S0099-2399(20)30042-X. doi: 10.1016/j.joen.2020.01.016.

 

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    2020-05-11 changhe713
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    2020-03-12 neurowu
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