title: Qualitative Assessment of Wear Resistance and Surface Hardness of Different Commercially Available Dental Porcelain: Anin vitroStudy.
abstract: BACKGROUND
  In an attempt to minimize wear damage to the enamel of antagonist teeth, new low and medium fusing ceramic materials have been developed. Manufacturers usually claim that these ceramics are wear-friendly because of their lower hardness, lower concentrations of crystal phase, and smaller crystal sizes. This study aimed to quantitatively analyze the wear strength of various commercially available dental porcelain with tooth enamel as well as the surface hardness of these dental porcelain.
  
  
  METHODS
  The basic model was designed as a pin on plate arrangement. The tooth specimens were mounted on the stylus which was centered on the ceramic specimen in a wear testing machine. The dental ceramic specimen was centered in the metal die. A load of 40 N was applied at a rate of 80 cycles/minute for 15 minutes. In the current study, mean wear depth (Ra) value, volumetric loss, and surface hardness were obtained by standard quantification method and were statistically evaluated.
  
  
  RESULTS
  Ceramco-3 was reported to be most abrasive for enamel; however, Duceram love significantly more abraded itself than the other two, Ceramco-3 and Vita Alpha, and generated the lowest loss of enamel. Also, same abrasive type of wear was revealed for all three variants of tested ceramics.
  
  
  CONCLUSIONS
  Ceramco-3 was the most abrasive for enamel, while surface roughness (mean wear depth) of Duceram love was maximum and for Ceramco-3 it was minimum. The value of surface roughness for Vita Alpha was in between Duceram love and Ceramco-3. Nonetheless, the mean surface hardness of Duceram love was found to be least and maximum for Vita Alpha.
  
  
  CONCLUSIONS
  In situations of dental wear and wasting tooth disease (Attrition/Abrasion), Duceram can be applied in lieu of Ceramco-3 so as to prevent worsening of existing dentition. However, in younger patients Vita Alpha would offer maximum durability due to its greater surface hardness.
authors.affiliation: Department of Prosthodontics, Sudha Rustagi College of Dental Sciences and Research, Faridabad, Haryana, India, Phone: +919818613206 e-mail: abhisheksingh69@gmail.com.
authors.forename: Abhishek
authors.initials: A
authors.lastname: Singh
authors.affiliation: Department of Prosthodontics, ITS-CDSR Dental College and Hospital, Ghaziabad, Uttar Pradesh, India.
authors.forename: Abhishek
authors.initials: A
authors.lastname: Nagpal
authors.affiliation: Department of Prosthodontics, Sudha Rustagi College of Dental Sciences and Research, Faridabad, Haryana, India.
authors.forename: Salil
authors.initials: S
authors.lastname: Pawah
authors.affiliation: Department of Prosthodontics, Sudha Rustagi College of Dental Sciences and Research, Faridabad, Haryana, India.
authors.forename: Chetan
authors.initials: C
authors.lastname: Pathak
authors.affiliation: Department of Prosthodontics, ITS-CDSR Dental College and Hospital, Ghaziabad, Uttar Pradesh, India.
authors.forename: Gaurav
authors.initials: G
authors.lastname: Issar
authors.affiliation: Department of Prosthodontics, Sudha Rustagi College of Dental Sciences and Research, Faridabad, Haryana, India.
authors.forename: Pankaj
authors.initials: P
authors.lastname: Sharma
mesh_terms: D003743:Dental Enamel / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D019554:Dental Restoration Wear; D006244:Hardness; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D036301:Qualitative Research; D013499:Surface Properties; D057085:Tooth Wear
chemical_list: C095718:Duceram; C472245:Vita Alpha; D003776:Dental Porcelain; C058233:Ceramco
keywords: Dental ceramics; Profilometer vickers microhardness tester Wear resistance.