title: Comparative Evaluation of Marginal Discrepancy in Tooth Colored Self Cure Acrylic Provisional Restorations With and Without Reinforcement of Glass Beads: An In-Vitro Study.
abstract: BACKGROUND
  This invitro study was conducted to compare and evaluate marginal discrepancy in two types of tooth colored self cure provisional restorative materials {DPI&UNIFAST TRAD} before and after reinforcement of glass beads.
  
  
  OBJECTIVE
  The aim of the present study was to evaluate and compare marginal discrepancy in two types of provisional restorative materials (DPI and UNI FAST TRAD) before and after reinforcement with Glass beads.
  
  
  METHODS
  Tooth shaped resin copings were fabricated on custom made brass metal die. A total of 60 resin copings were fabricated in which 30 samples were prepared with DPI and 30 samples with UNIFAST material. Each group of 30 samples were divided in to two sub groups in which 15 samples were prepared with glass bead reinforcement and 15 samples without reinforcement. The marginal discrepancy was evaluated with photomicroscope {Reichet Polyvar 2 met} by placing the resin copings on custom made brass resin coping holder.
  
  
  RESULTS
  Measurements obtained were statistically analysed by unpaired t-test to know any significance between two variables. Unreinforced DPI specimens had shown lower marginal discrepancy (442.82) than reinforced specimens (585.77). Unreinforced UNIFAST specimens have shown high values of marginal discrepancy (592.83) than reinforced specimens (436.35). p-value between reinforced and unreinforced specimens of DPI (p=0.0013) and UNIFAST (p= 0.0038) has shown statistical significance.
  
  
  CONCLUSIONS
  This in-vitro study revealed that unreinforced DPI specimens have shown lower marginal discrepancy than reinforced specimens and unreinforced UNIFAST specimens have shown higher values of marginal discrepancy than reinforced specimens.
authors.affiliation: Senior Lecturer, Department of Prosthodontics, Priya Darshini Dental College & Hospitals , Thiruvallur, Tamil Nadu, India .
authors.forename: Manoj Kumar
authors.initials: MK
authors.lastname: Yasangi
authors.affiliation: Senior Lecturer, Department of Prosthodontics, Priya Darshini Dental College & Hospitals , Thiruvallur, Tamil Nadu, India .
authors.forename: Dhanalakshmi
authors.initials: D
authors.lastname: Mannem
authors.affiliation: Senior Lecturer, Department of Public Health Dentistry, Sibar Institute of Dental Sciences , Guntur, Andhra Pradesh, India .
authors.forename: Vikram Simha
authors.initials: VS
authors.lastname: Bommireddy
authors.affiliation: Senior Lecturer, Department of Public Health Dentistry, Drs Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences , Gannavaram, Andhra Pradesh, India .
authors.forename: Sirisha
authors.initials: S
authors.lastname: Neturi
authors.affiliation: Senior Lecturer, Department of Public Health Dentistry, SIBAR Institute of Dental Sciences , Guntur, Andhra Pradesh, India .
authors.forename: Srinivas
authors.initials: S
authors.lastname: Ravoori
authors.affiliation: Senior Lecturer, Department of Prosthodontics, SIBAR Institute of Dental Sciences , Guntur, Andhra Pradesh, India .
authors.lastname: Jyothi
keywords: Fixed partial dentures; Marginal fit; Plaque retention; Prosthesis