Urchin-like multiscale structured fluorinated hydroxyapatite as versatile filler for caries restoration dental resin composites.

"Declaration of competing interest The authors declare no competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"The authors acknowledge the support from the 10.13039/501100001809National Natural Science Foundation of China (Grant Nos. 82201115, 81921002), 10.13039/501100002858China Postdoctoral Science Foundation (No.2021M702166), and the Innovative Research Team of High-level Local Universities in Shanghai, Oral and Maxillofacial Regeneration and Functional Restoration. Shuning Zhang: Writing – original draft, Methodology, Investigation, Formal analysis, Conceptualization. Xiao Wang: Validation, Investigation, Methodology, Writing – original draft. Shi Yin: Writing – original draft, Validation, Methodology. Junjun Wang: Validation, Investigation. Hongyan Chen: Writing – review & editing, Supervision, Funding acquisition, Conceptualization. Xinquan Jiang: Writing – review & editing, Supervision, Investigation, Funding acquisition, Conceptualization."