Effect of gaseous ozone and light-activated disinfection on the surface hardness of resin-based root canal sealers.
Although root canal instruments remove most of the content from the main root canal space, disinfection or irrigation plays an indispensable role in all areas of the root canal system, especially in parts that are inaccessible by instruments. The originality of this study was to investigate the effect of two novel disinfection techniques on the surface hardness of resin-based endodontic sealers using atomic force microscopy (AFM). Forty extracted single-rooted maxillary central human teeth were prepared and divided into four groups according to treatment methods. The first group was irrigated with saline and served as a control, other groups irrigated with sodium hypochlorite (NaClO); gaseous ozone; and light-activated disinfection (LAD). The groups were divided into two subgroups, according to the obturation method used: subgroup A: gutta-percha and AH plus; and subgroup B: EndoREZ/resin-coated cones. After obturation, atomic force microscopy (AFM) measurement was performed to analyze the surface hardness of the sealers. There was a significant difference between group 1A and group 3A (p < 0.05). Group 3B had the highest surface hardness values that were statistically different (p < 0.05). When disregarding the sealers, the ozone possessed statistically higher surface hardness values than the other groups in all root thirds (p < 0.05). The use of ozone and LAD may alter the surface hardness of resin-based sealers. The use of AFM can be considered an alternative hardness test techonology for sealing material.
Department of Endodontics, Faculty of Dentistry, Akdeniz University, Antalya, Turkey.
Öznur
Ö
Tuncay
Department of Endodontics, Faculty of Dentistry, Trakya University, Edirne, Turkey.
Özgür
Ö
Er
Department of Restorative Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
Sezer
S
Demirbuga
Department of Restorative Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
Yahya Orçun
YO
Zorba
Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
Hüseyin Sinan
HS
Topçuoğlu
D004202:Disinfectants / Q000494:pharmacology* / Q000528:radiation effects; D004203:Disinfection / Q000379:methods*; D006801:Humans; D008027:Light; D055595:Mechanical Phenomena / Q000187:drug effects; D018625:Microscopy, Atomic Force; D010083:Oxidants, Photochemical / Q000494:pharmacology* / Q000528:radiation effects; D010126:Ozone / Q000494:pharmacology* / Q000528:radiation effects; D012387:Root Canal Filling Materials; D012973:Sodium Hypochlorite / Q000494:pharmacology; D013499:Surface Properties / Q000187:drug effects*
D004202:Disinfectants; D010083:Oxidants, Photochemical; D012387:Root Canal Filling Materials; D010126:Ozone; D012973:Sodium Hypochlorite
atomic force microscopy; light-activated disinfection; ozone; resin-based sealer; surface hardness