title: In vitro and in vivo evaluation of diamond-coated strips.
abstract: OBJECTIVE
  To test in vitro and in vivo the wear performance of diamond-coated strips by means of tribological testing and scanning electronic microscope (SEM).
  
  
  METHODS
  To evaluate the in vitro wear performance, a tribological test was performed by a standard tribometer. The abrasive strips slid against stationary, freshly extracted premolars fixed in resin blocks, at a 2-newton load. At the end of the tribological test, the residual surface of the strip was observed by means of SEM analysis, which was performed every 50 meters until reaching 300 meters. For the in vivo analysis, the strip was used for 300 seconds, corresponding to 250 meters.
  
  
  RESULTS
  The strips presented a fenestrated structure characterized by diamond granules alternating with voids. After the first 50 meters, it was possible to observe tooth material deposited on the surface of the strips and a certain number of abrasive grains detached. The surface of the strip after 250 meters appeared smoother and therefore less effective in its abrasive power. After 300 seconds of in vivo utilization of the strip, it was possible to observe the detachment of diamond abrasive grains, the near absence of the grains and, therefore, loss of abrasive power.
  
  
  CONCLUSIONS
  Under ideal conditions, after 5 minutes (30 meters) of use, the strip loses its abrasive capacity by about 60%. In vivo, a more rapid loss of abrasive power was observed due to the greater load applied by the clinician in forcing the strip into the contact point.
authors: Roberta
authors: R
authors: Lione
authors: Francesca
authors: F
authors: Gazzani
authors: Chiara
authors: C
authors: Pavoni
authors: Stefano
authors: S
authors: Guarino
authors: Vincenzo
authors: V
authors: Tagliaferri
authors: Paola
authors: P
authors: Cozza
mesh_terms: D000293:Adolescent; D001641:Bicuspid; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003743:Dental Enamel / Q000737:chemistry*; D003775:Dental Polishing / Q000295:instrumentation*; D018130:Diamond / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties
chemical_list: D020099:Coated Materials, Biocompatible; D018130:Diamond
keywords: Diamond coated strip; Interproximal enamel reduction; SEM