title: Profilometric analysis of root surfaces after using various polishing agents.
abstract: BACKGROUND
  Polishing is an important step in oral prophylaxis procedure which retards further accumulation of plaque on the root surfaces. Though polishing was done with various abrasive particles with different sizes over a long period of time, it was never been highlighted to evaluate the ideal polishing material and the particle size that would produce the ideal surface smoothness (Ra <0.2 μm).
  
  
  METHODS
  The present study was carried out on 70 periodontally involved, caries-free extracted human teeth from 42 patients. All the teeth were collected from the region of incisors, canines, and premolars. In vitro scaling and root planing were performed by piezoelectric scaler and Gracey's area specific curettes, respectively. All the teeth were grouped at random into control and experimental. The collections of abrasive materials were done directly from the market, and the different particle sizes were prepared in the laboratory.
  The polishing was done at a constant speed of 200 rpm with cylindrical nylon bristle brush followed by rubber prophy cup. Each group belonging to control and experimental was subjected to profilometric study for evaluation of surface roughness.
  
  
  RESULTS
  Regular polishing abrasives are not able to produce the surface smoothness of our desire level (i.e., Ra <0.2 μm), which can be achieved only by submicron-sized particles.
  
  
  CONCLUSIONS
  Regular size polishing particles available in the market (>5 μm) are not able to produce the surface smoothness <0.2 μm. Only, submicron sized particles are able to produce the desired smoothness.
authors.affiliation: Department of Periodontics, Guru Nanak Institute of Dental Sciences and Research, Panihati, Kolkata, India.
authors.forename: Anjan
authors.initials: A
authors.lastname: Jana
authors.affiliation: Department of Periodontics, Guru Nanak Institute of Dental Sciences and Research, Panihati, Kolkata, India.
authors.forename: Abhijit
authors.initials: A
authors.lastname: Chakraborty
authors.affiliation: Department of Periodontics, Guru Nanak Institute of Dental Sciences and Research, Panihati, Kolkata, India.
authors.forename: Tamal Kanti
authors.initials: TK
authors.lastname: Pal
authors.affiliation: Central Glass and Ceramic Research Institute, Jadavpur, Kolkata, India.
authors.forename: Someswar
authors.initials: S
authors.lastname: Datta
keywords: Polishing; profilometer; surface smoothness