title: Evaluation of fracture resistance of reattached vertical fragments bonded with fiber-reinforced composites: an in vitro study.
abstract: OBJECTIVE
  Aim of this in vitro study was to evaluate the resistance to fracture of vertically fractured and reattached fragments bonded with fiber-reinforced composites.
  
  
  METHODS
  Root canals of 45 teeth were prepared, and the teeth were intentionally fractured into two separate fragments. Control groups (n = 15 each) consisted unfractured teeth with instrumented and obturated. Fractured teeth were divided into three groups (n = 15) and were attached using (1) dual-cure resin cement (RelyX U100), (2) dual-cure resin cement and polyethylene fiber (Ribbond), (3) dual-cure resin cement and glass fibers (stick-net). Force was applied at a speed of 0.5 mm/min to the root until fracture. RESULTS AND STATISTICAL ANALYSIS: Group 1 (RelyX U100 group) demonstrated lowest fracture resistance. Group 4 (control group) showed highest fracture resistance followed by group 2 (Ribbond group) and group 3 (Stick-Net groups). Statistically no significant difference was there between groups 2, 3 and 4.
  
  
  CONCLUSIONS
  Vertically fractured teeth can be treated by filling the root canal space with dual-cure adhesive resin cement or by adding polyethylene fiber or glass fiber to increase the fracture resistance of the reattached tooth fragments, an alternative to extraction.
authors.affiliation: Senior Lecturer, Department of Conservative Dentistry and Endodontics, DAPMRV Dental College, No. Ca 37, 24th Main, Ist Phase, JP Nagar, Bengaluru, Karnataka, India, Phone: 09986532454 e-mail: bshiva1985@gmail.com.
authors.forename: B Shiva
authors.initials: BS
authors.lastname: Kumar
authors.forename: P
authors.initials: P
authors.lastname: Spoorti
authors.forename: Jeetender
authors.initials: J
authors.lastname: Reddy
authors.forename: Shilpa
authors.initials: S
authors.lastname: Bhandi
authors.forename: S Sujatha
authors.initials: SS
authors.lastname: Gopal
authors.forename: Jayaprakash
authors.initials: J
authors.lastname: Ittigi
mesh_terms: D000293:Adolescent; D001641:Bicuspid / Q000293:injuries*; D001840:Dental Bonding / Q000379:methods*; D003764:Dental Materials / Q000737:chemistry; D005898:Glass / Q000737:chemistry; D006801:Humans; D011095:Polyethylenes / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D012008:Recurrence; D019279:Resin Cements / Q000737:chemistry; D018915:Root Canal Preparation / Q000379:methods; D013314:Stress, Mechanical; D014082:Tooth Fractures / Q000503:physiopathology* / Q000628:therapy; D014092:Tooth Root / Q000293:injuries*; D019553:Tooth, Nonvital / Q000628:therapy; D055815:Young Adult
chemical_list: D003764:Dental Materials; D011095:Polyethylenes; C084063:RIBBOND; C528569:Rely-X; D019279:Resin Cements; C009753:fiberglass