title: Fracture Resistance of Teeth Restored with Various Post Designs and Cemented with Different Cements: An In-vitro Study.
abstract: BACKGROUND
  Studies have been carried out on endodontically treated teeth restored with and without ferrule, and influence of the cementing medium, to evaluate their effect on fracture resistance. This study was conducted on 28 freshly extracted maxillary central incisors. Specimens were restored with two types of post designs, and cemented with two different luting agents, and tested for fracture resistance.
  
  
  METHODS
  A total of 28 freshly extracted maxillary central incisors were used. Specimens were restored with two types of post designs and cemented with two different luting agents and tested using Instron universal testing machine. The statistical analysis was performed using the Kruskal-Wallis test (H) and Tukey honest significant test.
  
  
  RESULTS
  Ferrule helped in increasing the fracture resistance of endodontically treated teeth. Resin cement showed better results than zinc phosphate cement. The combination of the post with ferrule and resin cement showed the greatest resistance. The combination of the post without ferrule and zinc phosphate cement showed the least resistance. Resin cement increased the resistance of even without ferrule.
  
  
  CONCLUSIONS
  There was a positive effect of a ferrule in increasing the fracture resistance. Resin cement showed better resistance than zinc phosphate cement.
authors.affiliation: Reader, Department of Prosthodontics Crown & Bridge, RKDF Dental College, Bhopal, Madhya Pradesh, India.
authors.forename: Ajay
authors.initials: A
authors.lastname: Gaikwad
authors.affiliation: Senior Lecturer, Department of Prosthodontics Crown & Bridge, RKDF Dental College, Bhopal, Madhya Pradesh, India.
authors.forename: Kapil Singh
authors.initials: KS
authors.lastname: Pal
authors.affiliation: Professor and Head, Department of Prosthodontics Crown & Bridge, RKDF Dental College, Bhopal, Madhya Pradesh, India.
authors.forename: L M
authors.initials: LM
authors.lastname: Ranganath
authors.affiliation: Senior Lecturer, Department of Prosthodontics Crown & Bridge, College of Dental Sciences, Davangere, Karnataka, India.
authors.forename: Jayesh Kumar
authors.initials: JK
authors.lastname: Jain
authors.affiliation: Reader, Department of Prosthodontics and Crown & Bridge, Bhabha College of Dental Sciences & Hospital, Bhopal, Madhya Pradesh, India.
authors.forename: Prashanth
authors.initials: P
authors.lastname: Patil
authors.affiliation: Post-graduate Student, Department of Prosthodontics Crown & Bridge, JSS Dental College & Hospital, Mysore, Karnataka, India.
authors.forename: Geetika
authors.initials: G
authors.lastname: Babar
keywords: Core; endodontically treated teeth; ferrule; fracture resistance; luting agent; post