In vivo remineralization of dentin using an agarose hydrogel biomimetic mineralization system.
A novel agarose hydrogel biomimetic mineralization system loaded with calcium and phosphate was used to remineralize dentin and induce the oriented densely parallel packed HA layer on defective dentin surface in vivo in a rabbit model. Firstly, the enamel of the labial surface of rabbits' incisor was removed and the dentin was exposed to oral environment. Secondly, the hydrogel biomimetic mineralization system was applied to the exposed dentin surface by using a custom tray. Finally, the teeth were extracted and evaluated by scanning electron microscopy, X-ray diffraction, and nanoindentation test after a certain time of mineralization intervals. The regenerated tissue on the dentin surface was composed of highly organised HA crystals. Densely packed along the c axis, these newly precipitated HA crystals were perpendicular to the underlying dental surface with a tight bond. The demineralized dentin was remineralized and dentinal tubules were occluded by the grown HA crystals. The nanohardness and elastic modulus of the regenerated tissue were similar to natural dentin. The results indicated a potential clinical use for repairing dentin-exposed related diseases, such as erosion, wear, and dentin hypersensitivity.
College &Hospital of Stomatology, Anhui Medical University, Key Lab of Oral Diseases Research of Anhui Province, Hefei, 230032, China.
Min
M
Han
College &Hospital of Stomatology, Anhui Medical University, Key Lab of Oral Diseases Research of Anhui Province, Hefei, 230032, China.
Quan-Li
QL
Li
College &Hospital of Stomatology, Anhui Medical University, Key Lab of Oral Diseases Research of Anhui Province, Hefei, 230032, China.
Ying
Y
Cao
College &Hospital of Stomatology, Anhui Medical University, Key Lab of Oral Diseases Research of Anhui Province, Hefei, 230032, China.
Hui
H
Fang
Department of Stomatology, the Second Hospital affiliated to Anhui Medical University, Hefei, 230601, China.
Rong
R
Xia
Department of Stomatology, the Hospital of Anhui Province, Hefei, 230001, China.
Zhi-Hong
ZH
Zhang
D000818:Animals; D032701:Biomimetics / Q000379:methods*; D003804:Dentin / Q000737:chemistry*; D055119:Elastic Modulus; D020100:Hydrogels / Q000737:chemistry*; D008297:Male; D011817:Rabbits; D012685:Sepharose / Q000737:chemistry*; D014089:Tooth Remineralization / Q000379:methods*
D020100:Hydrogels; D012685:Sepharose