title: Smear layer formed by different root planing modalities and its removal by an ethylenediaminetetraacetic acid gel preparation.
abstract: The purpose of the present study was (1) to examine smear layer formation following different root planing modalities, and (2) to evaluate its removal and the exposure of collagen using an ethylenediaminetetraacetic acid gel preparation. Twenty-four periodontitis-affected human teeth were mechanically root planed. Twelve teeth were etched with an ethylenediaminetetraacetic acid gel preparation. The surfaces were examined by a scanning electron microscope. The results showed that root planing resulted in a smear layer covering the root surfaces, irrespective of treatment modality. The smear layer could be efficiently removed with the ethylenediaminetetraacetic acid gel preparation. During this process, collagen fibers were exposed to varying degrees.
authors.affiliation: Department of Oral Histology, School of Dentistry, Karolinska Institutet, Huddinge, Sweden.
authors.forename: J P
authors.initials: JP
authors.lastname: Blomlöf
authors.forename: L B
authors.initials: LB
authors.lastname: Blomlöf
authors.forename: S F
authors.initials: SF
authors.lastname: Lindskog
mesh_terms: D000134:Acid Etching, Dental; D003094:Collagen / Q000187:drug effects / Q000648:ultrastructure; D004353:Drug Evaluation, Preclinical; D004492:Edetic Acid / Q000494:pharmacology* / Q000627:therapeutic use; D005782:Gels; D006801:Humans; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D010518:Periodontitis / Q000473:pathology / Q000628:therapy; D011897:Random Allocation; D016745:Root Planing / Q000379:methods*; D016369:Smear Layer; D013499:Surface Properties; D014092:Tooth Root / Q000187:drug effects / Q000648:ultrastructure; D014464:Ultrasonic Therapy
chemical_list: D005782:Gels; D003094:Collagen; D004492:Edetic Acid