title: [Optimization of structural characteristics of a root canal wall during retrograde tooth filling on a basis of scanning electron microscopy data].
abstract: Studies by scanning electron microscopy showed that dentin of the root stump (resection of the root apex is an obligatory condition of retrograde filling) has numerous regular dentin tubules, in contrast to the apical part of the root. Mechanical treatment of dentin during preparation of the platform for retrograde filling leads to the formation of a thick "lubricating" layer on the surface of these platform. This layer consists of corpuscles of destroyed tissue substance (smudge) and completely covers the ends of dentin tubules, thus preventing the formation of strong bonds between the filling material and dentin surface. Treatment (pickling) of the platform surface with the conditioner notably improved the adhesion of Russian filling material Dentis to dentin. The best adhesive effect of retrograde filling was attained with Kemfil, the material requiring no pickling pretreatment.
authors.forename: L A
authors.initials: LA
authors.lastname: Grogor'iants
authors.forename: A S
authors.initials: AS
authors.lastname: Grigor'ian
authors.forename: N N
authors.initials: NN
authors.lastname: Nasyrova
mesh_terms: D000268:Adhesiveness; D002448:Cell Adhesion / Q000502:physiology; D003738:Dental Cements / Q000737:chemistry*; D003786:Dental Pulp Cavity / Q000502:physiology / Q000648:ultrastructure*; D003804:Dentin / Q000502:physiology / Q000648:ultrastructure*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D012184:Retrograde Obturation / Q000009:adverse effects / Q000379:methods*; D012387:Root Canal Filling Materials / Q000737:chemistry*
chemical_list: D003738:Dental Cements; D012387:Root Canal Filling Materials