Impact of accelerated artificial aging on surface microhardness and roughness of naturally nano-treated initial caries-like lesions: (An in-vitro study)

Document Type : Original Article

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Lecturer at Operative Dentistry Department, Faculty of Dentistry, Ain Shams University

Abstract

Aim: This study investigated the effect of remineralization potential and surface roughness of nano chicken eggshell gel (CESG) or solution (CESS) on initial enamel caries lesion after thermocycling.
Materials and methods: A total of 50 caries-free human premolars were randomly divided into five groups (n=10): group(I) (positive control): No treatment was done to the sound enamel. Group (II):(negative control): The enamel surface underwent demineralization and received no treatment. Group III (GCM): After demineralization, the teeth were treated with (GCM). Group IV (CESG): After enamel demineralization, the teeth were treated with (CESG). Group V (CESS ): After demineralization, the teeth were immersed in (CESS). The remineralizing agent was applied twice daily for two minutes each time for 30 consecutive days. All groups underwent 10000 cycles of thermocycling. Surface microhardness and surface roughness were measured for all groups before and after thermocycling. Results: (CESG) recorded higher statistically significant microhardness values than (CESS), while it reported lower statistically significant surface roughness values than (CESS) after accelerated aging. Conclusions: (CESG) exhibited a promising therapeutic potential in treating (WSLs) due to its natural biogenic composition. Remineralization using (CESG) improved and maintained the microhardness and surface roughness more effectively than (CESS). Clinical significance: Nano chicken egg shell powder has a clinical potential to remineralize and restore the enamel smoothness of subsurface enamel lesions.

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Egyptian Dental Journal
Volume 71, Issue 3 - Serial Number 5
Conservative Dentistry and Endodontics
July 2025
Pages 2761-2772

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