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Yin L, Xu X, Chu C, Lin P, Huang H, Luo B, Yang C. In-vitro characterization and evaluation of mesoporous titanium dioxide composite hydroxyapatite and its effectiveness in occluding dentine tubules. BMC Oral Health 2022; 22:43. [PMID: 35197041 PMCID: PMC8864878 DOI: 10.1186/s12903-021-01989-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 11/25/2021] [Indexed: 11/15/2022] Open
Abstract
Background To synthesize mesoporous titanium dioxide composite hydroxyapatite (TiO2–HAP) and to evaluate its effectiveness in sealing of occluding dentine tubules. Methods TiO2–HAP was synthesized by chemical precipitation method and characterized using infrared absorption spectrometer, X-ray diffraction, scanning electron microscope, and specific surface area detector. Forty completely extracted molars were prepared and randomly assigned into Control group, Gluma group, HAP group and TiO2–HAP group according to different treatments. The characteristics of HAP and TiO2–HAP and the sealing effectiveness of dentine tubules in these four groups, including infrared spectrum, surface contact angle, pore size distribution, and re-mineralized enamel surface profiles, were analyzed by suitable characterized techniques. The cytotoxicity of the synthesized TiO2–HAP was tested and compared using 3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di-phenytetrazoliumromide (MTT) colorimetry. Results Our results showed TiO2–HAP group had significantly lower contact angle, higher specific surface area, and wider range of pore size distribution than other groups. The majority of dentinal tubules in the TiO2–HAP group were blocked by white matter in a uniformed manner, and the crystals arranged in order grew along the axial direction. In addition, no significant difference in optical density (OD) value was found between control group and TiO2–HAP group (P > 0.05), and cell growth was good in TiO2–HAP group, indicating no cytotoxicity of TiO2–HAP. Conclusions The MTT assay identified that TiO2–HAP had little effect on the L929 cell line. We showed TiO2–HAP might be used as a remineralization agent in enamel caries-like lesions.
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Affiliation(s)
- Lu Yin
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Stomatological Hospital of Xiamen Medical College, No. 1309, Lvling Road, Huli District, Xiamen, 361008, Fujian, China.,Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, 361008, Fujian, China
| | - Xuehong Xu
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Stomatological Hospital of Xiamen Medical College, No. 1309, Lvling Road, Huli District, Xiamen, 361008, Fujian, China.,Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, 361008, Fujian, China
| | - Chienyu Chu
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Stomatological Hospital of Xiamen Medical College, No. 1309, Lvling Road, Huli District, Xiamen, 361008, Fujian, China.,Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, 361008, Fujian, China
| | - Pingting Lin
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Stomatological Hospital of Xiamen Medical College, No. 1309, Lvling Road, Huli District, Xiamen, 361008, Fujian, China.,Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, 361008, Fujian, China
| | - Honglan Huang
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Stomatological Hospital of Xiamen Medical College, No. 1309, Lvling Road, Huli District, Xiamen, 361008, Fujian, China.,Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, 361008, Fujian, China
| | - Bizhu Luo
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Stomatological Hospital of Xiamen Medical College, No. 1309, Lvling Road, Huli District, Xiamen, 361008, Fujian, China.,Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, 361008, Fujian, China
| | - Changwei Yang
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Stomatological Hospital of Xiamen Medical College, No. 1309, Lvling Road, Huli District, Xiamen, 361008, Fujian, China. .,Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen, 361008, Fujian, China.
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