TY - JOUR
T1 - Endodontic sealers after exposure to chlorhexidine digluconate
T2 - An assessment of physicochemical properties
AU - Kapralos, Vasileios
AU - Camilleri, Josette
AU - Koutroulis, Andreas
AU - Valen, Håkon
AU - Ørstavik, Dag
AU - Sunde, Pia Titterud
PY - 2024/3
Y1 - 2024/3
N2 - Objectives
Final root canal irrigation should ideally maintain the physicochemical stability of root canal sealers. We seek to assess the effect of contact with 2% chlorhexidine digluconate (CHX) on the physicochemical properties of AH Plus, BioRoot™ RCS, and Pulp Canal Sealer (PCS).
Methods
Mixed sealers were placed in cylindrical teflon molds and allowed to set for 1.5x the manufacturers’ setting time. Half of the specimens had their free surface in contact with CHX for the first minute of their setting period. Solubility, radiopacity, surface roughness, microhardness and wettability of the sealers were assessed up to 28 days after setting. Elemental analysis of sealer surfaces and their leachates together with pH measurements were also performed. Appropriate parametric and non-parametric analysis with post hoc tests were performed (p < 0.05).
Results
Exposure to CHX had no effect on solubility and radiopacity of all sealers. CHX altered the surface roughness of PCS and BioRoot RCS (p < 0.05). Contact with CHX reduced the microhardness of AH Plus and PCS (p < 0.05). AH Plus was more hydrophilic after CHX contact, whereas PCS became more hydrophobic (p < 0.05). AH Plus and PCS surfaces appeared to adsorb CHX as exhibited by chlorine peaks after contact with CHX. Sealer leachates’ alkalinity was not affected. CHX increased elution of silicon and zirconium for BioRoot and zinc for PCS leachates.
Significance
In our study, CHX affected sealers’ physicochemical properties to various extents. Further studies are needed to confirm the obtained results by investigating various final irrigation strategies and correlating to biological properties.
AB - Objectives
Final root canal irrigation should ideally maintain the physicochemical stability of root canal sealers. We seek to assess the effect of contact with 2% chlorhexidine digluconate (CHX) on the physicochemical properties of AH Plus, BioRoot™ RCS, and Pulp Canal Sealer (PCS).
Methods
Mixed sealers were placed in cylindrical teflon molds and allowed to set for 1.5x the manufacturers’ setting time. Half of the specimens had their free surface in contact with CHX for the first minute of their setting period. Solubility, radiopacity, surface roughness, microhardness and wettability of the sealers were assessed up to 28 days after setting. Elemental analysis of sealer surfaces and their leachates together with pH measurements were also performed. Appropriate parametric and non-parametric analysis with post hoc tests were performed (p < 0.05).
Results
Exposure to CHX had no effect on solubility and radiopacity of all sealers. CHX altered the surface roughness of PCS and BioRoot RCS (p < 0.05). Contact with CHX reduced the microhardness of AH Plus and PCS (p < 0.05). AH Plus was more hydrophilic after CHX contact, whereas PCS became more hydrophobic (p < 0.05). AH Plus and PCS surfaces appeared to adsorb CHX as exhibited by chlorine peaks after contact with CHX. Sealer leachates’ alkalinity was not affected. CHX increased elution of silicon and zirconium for BioRoot and zinc for PCS leachates.
Significance
In our study, CHX affected sealers’ physicochemical properties to various extents. Further studies are needed to confirm the obtained results by investigating various final irrigation strategies and correlating to biological properties.
U2 - 10.1016/j.dental.2023.11.019
DO - 10.1016/j.dental.2023.11.019
M3 - Article
SN - 0109-5641
VL - 40
SP - 420
EP - 430
JO - Dental Materials
JF - Dental Materials
IS - 3
ER -