Influence of chlorogenic acid disinfectant on surface characteristics of addition silicone impression materials

Addition silicone impression, disinfection, chlorogenic acid, surface roughness, wettability, gypsum.

Dr. Sura Hayder Majeed 1*
Department of Prosthodontics, College of
Dentistry, University of Baghdad, Baghdad,
Iraq.
ORCID iD - 0009-0003-1999-6215

Prof. Aseel Mohammed Al-Khafaji 2
Department of Prosthodontics, College of
Dentistry, University of Baghdad, Baghdad,
Iraq
ORCID iD - 0000-0002-7172-7026
Scopus ID - 58725821200

Received:14-06-2026
Revised:18-07-2026
Accepted: 24-07-2026

European Journal of Prosthodontics and Restorative Dentistry (2026) 34 (7s), 581-588

Influence of chlorogenic acid disinfectant on surface characteristics of addition silicone impression materials

Objectives: This in vitro study was conducted to investigate the surface roughness, wettability, and compatibility with gypsum products of addition silicone impression materials after disinfection by immersion in chlorogenic acid (CA) solutions. Material and methods: Sixty addition silicone impression material samples were prepared, using a ring mold (30 mm in diameter, 3 mm wall thickness). Thirty samples for each test (surface roughness and wettability), and blindly distributed into three groups (n = 10 per group). Another thirty addition silicone samples were fabricated by utilizing a device created in compliance with ISO 4823:2015 that was poured after the disinfection procedure with die stone to assess the compatibility with gypsum products. Specimens were separated blindly into three groups: one control group and two experimental groups (n = 10 per group). Surface roughness (Ra) was measured using a contact profilometer; the goniometer, measuring the contact angle, was used to assess wettability; and compatibility with gypsum was assessed using ISO 4823:2015, with specific grades assigned. Disinfection was done by immersion in 50 mg/ml and 60 mg/ml CA solutions for ten minutes. Results: There was a non-significant effect on surface roughness, wettability, and compatibility with gypsum products of addition silicone impression material after immersion in CA solutions for ten minutes (p > 0.05). Conclusion: within the limitation of this study, CA solution may be used as an effective disinfectant without affecting the surface characteristics of addition silicone impression materials. Clinical relevance: CA solutions present promising natural alternative for disinfecting addition silicone impressions, ensuring effective disinfection without compromising the surface texture or the subsequent accuracy of the gypsum casts.

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