Physical properties of AH Plus with chlorhexidine and cetrimide.
BACKGROUND
The use of root canal filling materials with antibacterial activity could be considered beneficial to reduce any remaining microorganisms and prevent recurrent infection. The aim of this study was to evaluate the physical properties of AH Plus (Dentsply DeTrey, Konstanz, Germany) alone and mixed with 1% or 2% chlorhexidine (CHX); 0.1%, 0.2%, 0.3%, and 0.5% of cetrimide (CTR); and combinations of both.


METHODS
Setting time, flow, solubility, and radiopacity of AH Plus and modified AH Plus were evaluated following the American National Standards Institute/American Dental Association's requirements (ANSI/ADA Specification No. 57/2000). Five samples of each material were tested for each property. The hypothesis of equality among groups was rejected by an analysis of variance test, and then a post hoc Tukey test was performed.


RESULTS
AH Plus and modified AH Plus gave values that are within the required standards. Overall, results indicate that CTR increased setting time, but CHX alone and CHX + CTR reduced it. CHX increased the flow, whereas CTR reduced it, and their combinations gave intermediate values comparable with those of AH Plus. Concerning solubility, the weight loss in all samples was under the 3% limit set by the ANSI/ADA. In comparison with AH Plus alone, radiopacity gave slightly lower values with CHX, higher values with CTR, and similar values with combinations.


CONCLUSIONS
The addition of CHX, CTR, and combinations of both to AH Plus did not alter the physical properties specified by ANSI/ADA requirements.
Department of Paediatric Dentistry, University of Granada, Granada, Spain. Electronic address: matr@ugr.es.
Matilde
M
Ruiz-Linares
Ma Estela
ME
Bailón-Sánchez
Pilar
P
Baca
Mariano
M
Valderrama
Carmen María
CM
Ferrer-Luque
D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D055598:Chemical Phenomena; D002710:Chlorhexidine / Q000031:analogs & derivatives* / Q000737:chemistry; D003287:Contrast Media / Q000737:chemistry; D004853:Epoxy Resins / Q000737:chemistry*; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D012212:Rheology; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012995:Solubility; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014783:Viscosity
D000891:Anti-Infective Agents, Local; D002593:Cetrimonium Compounds; D003287:Contrast Media; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; C010882:chlorhexidine gluconate; D002710:Chlorhexidine; D000077286:Cetrimonium
AH Plus; cetrimide; chlorhexidine; physical properties