title: Sharpening of periodontal instruments with different sharpening stones and its influence upon root debridement--scanning electronic microscopy assessment.
abstract: The objective of this study was to evaluate, through scanning electronic microscopy, the effect of sharpening with different sharpening stones on the cutting angle of periodontal curettes (Gracey 5-6), and the influence on root surfaces after debridement and planing. The experimental model consisted of two different phases. In the first, the cutting angles of fifteen stainless steel Gracey 5-6 curettes were analyzed under a scanning electronic microscope after being sharpened with different types of stones. In the second phase, the root surfaces of 25 newly extracted teeth were evaluated with a scanning electronic microscope after being debrided with curettes sharpened with different stones. Analysis of the results showed that the synthetic stones (aluminum oxide and carborundum) are more abrasive and produce more irregular cutting angles, whereas Arkansas stones are less abrasive and produce smoother and more defined cutting angles. There was no significant statistical differences among the five groups tested with regard to the degree of irregularity of the root surfaces after instrumentation.
authors.affiliation: School of Dentistry of Barretos, Master Degree in Periodontology, School of Dentistry of Araraquara-UNESP.
authors.forename: Marcelo Vieira
authors.initials: MV
authors.lastname: Silva
authors.forename: Débora Aline Silva
authors.initials: DA
authors.lastname: Gomes
authors.forename: Fábio Renato Manzolli
authors.initials: FR
authors.lastname: Leite
authors.forename: José Eduardo Cezar
authors.initials: JE
authors.lastname: Sampaio
authors.forename: Benedicto Egbert Correia
authors.initials: BE
authors.lastname: de Toledo
authors.forename: Ary José Dias
authors.initials: AJ
authors.lastname: Mendes
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D006801:Humans; D008855:Microscopy, Electron, Scanning; D016745:Root Planing / Q000295:instrumentation* / Q000379:methods; D017655:Silicon Compounds / Q000737:chemistry; D016037:Single-Blind Method; D013193:Stainless Steel / Q000737:chemistry; D013357:Subgingival Curettage / Q000295:instrumentation*; D013499:Surface Properties; D014092:Tooth Root / Q000648:ultrastructure
chemical_list: D017554:Carbon Compounds, Inorganic; D003722:Dental Alloys; D017655:Silicon Compounds; D013193:Stainless Steel; D000537:Aluminum Oxide; C022088:silicon carbide