title: Evaluation of effect of ultrasonic scaling on surface roughness of four different tooth-colored class V restorations: An in-vitro study.
abstract: OBJECTIVE
  This study evaluated the effect of ultrasonic scaling on surface roughness of four different tooth-colored class V restorations.
  
  
  METHODS
  Out of 100 human extracted teeth, 20 were randomly selected for each group, marked with the outline of class V cavity. Class V cavities were prepared on facial surface of teeth of all groups except control group. These cavities were then restored with GC 2, GC 9, GC 2 LC, and Filtek Z 250 XT. All the specimens were stored in artificial saliva at 37°C for 1 month. Initial surface roughness values (Ra in μm) of restorations were evaluated with the surface roughness tester. Ultrasonic instrumentation was then carried out for 60 s on the restoration surface and final roughness values were evaluated. Data were analyzed with Paired t-test, One-way ANOVA, Tukey's test.
  
  
  RESULTS
  Mean Pre-instrumentation surface roughness was highest with GC 2, whereas it was least in case of Filtek Z 250 XT. Mean post-instrumentation surface roughness was highest with GC 2, whereas it is least in case of Filtek Z 250 XT.
  
  
  CONCLUSIONS
  GC 2 LC showed highest and Filtek Z 250 XT showed least susceptibility to ultrasonic scaling.
authors.affiliation: Department of Conservative Dentistry and Endodontics, Vidya Shikshan Prasarak Mandal's Dental College and Research Center, Nagpur, Maharashtra, India.
authors.forename: Pratima R
authors.initials: PR
authors.lastname: Shenoi
authors.affiliation: Department of Conservative Dentistry and Endodontics, Vidya Shikshan Prasarak Mandal's Dental College and Research Center, Nagpur, Maharashtra, India.
authors.forename: Gautam P
authors.initials: GP
authors.lastname: Badole
authors.affiliation: Department of Conservative Dentistry and Endodontics, Vidya Shikshan Prasarak Mandal's Dental College and Research Center, Nagpur, Maharashtra, India.
authors.forename: Rajiv T
authors.initials: RT
authors.lastname: Khode
authors.affiliation: Department of Conservative Dentistry and Endodontics, Vidya Shikshan Prasarak Mandal's Dental College and Research Center, Nagpur, Maharashtra, India.
authors.forename: Elakshi S
authors.initials: ES
authors.lastname: Morey
authors.affiliation: Department of Conservative Dentistry and Endodontics, Vidya Shikshan Prasarak Mandal's Dental College and Research Center, Nagpur, Maharashtra, India.
authors.forename: Pooja G
authors.initials: PG
authors.lastname: Singare
keywords: Class V restorations; Filtek Z250 XT; GC 2; GC 2LC; GC 9; GIC; Resin modified GIC; nanohybrid composite; surface roughness; ultrasonic scaling