Smear layer instability caused by hemostatic agents

The effect of hemostatic agents, other than a 15.5% Fe 2(SO 4) 3 solution, on prepared tooth structure is unknown. The purpose of this study was to (1) compare the effect of six commonly used hemostatic solutions and two nondental astringents on the dentinal smear layer and (2) determine whether dif...

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Bibliographic Details
Published in:The Journal of prosthetic dentistry 1996-11, Vol.76 (5), p.477-482
Main Authors: Land, Martin F, Couri, Carla C, Johnston, William M
Format: Article
Language:English
Subjects:
Acid Etching, Dental
Aluminum Chloride
Aluminum Compounds - chemistry
Aluminum Compounds - pharmacology
Analysis of Variance
Astringents - chemistry
Astringents - pharmacology
Chlorides - chemistry
Chlorides - pharmacology
Dentin - drug effects
Dentin - ultrastructure
Dentistry
Epinephrine - chemistry
Epinephrine - pharmacology
Ferric Compounds - chemistry
Ferric Compounds - pharmacology
Hemostatics - chemistry
Hemostatics - pharmacology
Humans
Hydrogen-Ion Concentration
Imidazoles - chemistry
Imidazoles - pharmacology
Microscopy, Electron, Scanning
Oxymetazoline - chemistry
Oxymetazoline - pharmacology
Racepinephrine
Smear Layer
Statistics, Nonparametric
Surface Properties
Tooth Preparation, Prosthodontic - methods
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Summary:The effect of hemostatic agents, other than a 15.5% Fe 2(SO 4) 3 solution, on prepared tooth structure is unknown. The purpose of this study was to (1) compare the effect of six commonly used hemostatic solutions and two nondental astringents on the dentinal smear layer and (2) determine whether different responses caused by product and/or time could be established. Standardized dentinal smear layers were exposed to eight astringent solutions for 30, 120, and 300 seconds (n = 6). A total of 144 SEM photographs at ×2400 magnification were ranked according to predetermined criteria for five categories of smear layer removal and etching of underlying tooth structure. There were significant differences ( p < 0.001) caused by the solution, exposure time, and their interaction. Greatest smear layer removal was observed with 21.3% AlCl 3-6 hydrate, 8% racemic epinephrine HCl, and 15.5% Fe 2(SO 4) 3 solutions at longer exposures. These caused significantly more removal than did almost pH neutral tetrahydrozoline or oxymetazoline ( p < 0.05).
ISSN:0022-3913
1097-6841
DOI:10.1016/S0022-3913(96)90004-9