当前位置:首页>南京>南京医科大学附属口腔医院牙髓病科:牙本质修复新突破:这种复合物能让牙齿“自我再生”,粘结更持久!

南京医科大学附属口腔医院牙髓病科:牙本质修复新突破:这种复合物能让牙齿“自我再生”,粘结更持久!

  • 2026-02-13 08:25:43
南京医科大学附属口腔医院牙髓病科:牙本质修复新突破:这种复合物能让牙齿“自我再生”,粘结更持久!
研究导读:本文由南京医科大学附属口腔医院牙髓病科于《Dental MaterialsIF:6.3)上发表,研究结果表明,PAA-Cit-ACP可促进快速仿生再矿化,保护暴露的脱矿胶原纤维免受水和基质金属蛋白酶(MMPs)诱导的降解,并提高混合层的稳定性。

图文结果解读

图1:PAA-Cit-ACP的表征。(A) CaP、PAA-ACP、PAA-Cit-ACP的代表性SEM图像。(B) CaP、 PAAACP 、PAA-Cit-ACP的代表性TEM和 SAED 图像。(C) CaP、PAA-ACP、PAA-Cit-ACP的傅里叶变换红外(FTIR)光谱。(D) CaP、PAA-ACP、PAA-Cit-ACP的X射线衍射(XRD)光谱。(E) CaP、PAA-ACP、PAA-Cit-ACP的Zeta电位。(F-H)PAA-ACP和PAA-Cit-ACP在1天(F)、4天(G)和7天(H)的 CCK -8结果。
图2:分子动力学模拟。(A)PAA吸收钙离子20ns后的模拟快照。(B)向PAA- Ca² ⁺体系中加入 HPO₄² ⁻离子和 C₆H₅O₇³ ⁻离子后形成的PAA-Cit-ACP模拟快照(t=20ns)。(C) Ca² ⁺离子、 HPO₄² ⁻离子和 C₆H₅O₇³ ⁻离子在距离PAA4.5A、6.5A和8.5A处的浓度变化(t=20ns)。(D) Ca² ⁺离子与PAA、 Ca² ⁺离子与 HPO₄² ⁻离子、 Ca² ⁺离子与 C₆H₅O₇³ ⁻离子之间的静电相互作用。
图3:胶原纤维矿化。(A)胶原纤维矿化12小时后的代表性透射电镜(TEM)和扫描电子显微镜(SAED)图像。处理组从左至右依次为PAA-ACP、PAA-Cit-ACP-0.5、PAA-Cit-ACP-1、PAA-Cit-ACP-2和PAA-Cit-ACP-5。(B)经PAA-ACP、PAA-Cit-ACP-0.5、PAA-Cit-ACP-1、PAA-Cit-ACP-2和PAA-Cit-ACP-5处理的胶原纤维的扫描透射电子显微镜(STEM)和能谱分析(EDS)映射图像。
图4:胶原纤维分别矿化24小时和7天。(A)胶原纤维矿化24小时的代表性透射电镜(TEM)和 SAED 图像。处理组从左至右依次为PAA-ACP、PAA-Cit-ACP-0.5、PAA-Cit-ACP-1、PAA-Cit-ACP-2和PAA-Cit-ACP-5。(B)胶原纤维7天矿化后的代表性TEM和 SAED 图像。处理组从左至右依次为PAA-ACP、PAA-Cit-ACP-0.5、PAA-Cit-ACP-1、PAA-Cit-ACP-2和PAA-Cit-ACP-5。
图5:牙本质矿化过程。(A)不同处理组牙本质的代表性扫描电镜图像。(a1,a2)未处理组,(b1,b2)PAA-ACP组,(c1,c2)PAA-Cit-ACP-0.5组,(d1,d2)PAA-Cit-ACP-1组,(e1,e2)PAA-Cit-ACP-2组,(f1,f2)PAA-Cit-ACP-5组。箭头所示为胶原纤维局部直径增大的区域。(B)傅里叶变换红外光谱(FTIR)。(C)X射线衍射光谱(XRD)。(D)维氏硬度测试(VHN)。
图6:粘接面在七天矿化后的粘接性能。(A) 24小时储存后(a1-f1)与6个月储存后(a2-f2)的纳米渗漏代表性扫描电镜图像。(B) 纳米渗漏的定量计算结果。不同上标字母表示实验组间存在统计学显著差异(P < 0.05)。(C) 24小时储存后(a1-f1)与6个月储存后(a2-f2)的原位酶谱代表性 CLSM 图像。(D) 荧光强度的定量计算结果。不同上标字母表示实验组间存在统计学显著差异(P < 0.05)。R:树脂;D:牙本质;HL:混合层。
图7:经一分钟预处理后粘接面的粘接性能。(A) 24小时储存(a1-c1)与7天储存(a2-c2)后的纳米渗漏代表性扫描电镜图像。(B) 纳米渗漏定量计算结果。不同上标字母表示实验组间存在统计学显著差异(P < 0.05)。(C) 24小时储存(a1-c1)与7天储存(a2-c2)后的原位酶谱代表性 CLSM 图像。(D) 荧光强度定量计算结果。

研究结论

基于本体外研究的局限性,可以得出结论:当柠檬酸盐与聚丙烯酸(PAA)结合时,能有效稳定过饱和磷酸钙溶液。这一过程会形成聚丙烯酸/柠檬酸盐/无定形磷酸钙复合物。这些复合物具有良好的生物相容性,并能在特定浓度下促进牙髓干细胞增殖。与PAA-ACP相比,PAA-Cit-ACP能更快、更完全地诱导重组I型胶原纤维的仿生矿化及部分脱矿牙本质的再矿化。由此形成的持久性混合层可能具有更强的抗蛋白水解降解能力。
#牙周炎#口腔科#口腔科医生#口腔科科研#牙周病科#口腔医院
于Yinying Chen文《Polyacrylic acid/citrate/amorphous calcium phosphate complex for dentin remineralization and bond durability》(2025年),因客观原因未能与权利人取得联系。本平台出于学术交流目的引用,无意侵犯原作者权益。如权利人认为不妥,请及时联系公众号后台,我们将立即删除或协商解决。
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  1. CONNECT:[ UseTime:0.000542s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000978s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000386s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000258s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000487s ]
  6. SELECT * FROM `set` [ RunTime:0.000194s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000512s ]
  8. SELECT * FROM `article` WHERE `id` = 466685 LIMIT 1 [ RunTime:0.003567s ]
  9. UPDATE `article` SET `lasttime` = 1771761940 WHERE `id` = 466685 [ RunTime:0.005795s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000292s ]
  11. SELECT * FROM `article` WHERE `id` < 466685 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000732s ]
  12. SELECT * FROM `article` WHERE `id` > 466685 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000379s ]
  13. SELECT * FROM `article` WHERE `id` < 466685 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001047s ]
  14. SELECT * FROM `article` WHERE `id` < 466685 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003674s ]
  15. SELECT * FROM `article` WHERE `id` < 466685 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004204s ]
0.092897s