Evaluation of fiber-composite laminate in the restoration of immature, nonvital maxillary central incisors.
The purpose of this study was to evaluate the use of fiber-composite laminate, a reinforcement ribbon embedded throughout a composite restoration, to reinforce immature maxillary central incisors. Twenty-six mature maxillary central incisors were prepared a minimum of 3 mm below the facial cementoenamel junction to simulate immature nonvital teeth. They were separated into 3 groups: group 1 was unfilled and served as a control; group 2 was filled to the depth of the preparation with composite; and group 3 was filled with composite and Connect Reinforcement Ribbon. The specimens were subjected to class I loading in an Instron Testing Machine until catastrophic failure occurred. The results indicate a highly significant difference between the groups (p < or = 0.003). Group 1 fractured at an average load of 31.08 kg, group 2 at 51.00 kg, and group 3 at 37.93 kg. These findings suggest that composite alone increases fracture resistance of the immature tooth model more than composite with Reinforcement Ribbon.
Pene
J R
JR
Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle 98195-7448, USA.
Nicholls
J I
JI
Harrington
G W
GW
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry / Q000627:therapeutic use*; D003764:Dental Materials / Q000737:chemistry / Q000627:therapeutic use*; D017220:Dentin-Bonding Agents / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D007180:Incisor / Q000473:pathology*; D008422:Materials Testing; D008437:Maxilla; D008689:Methacrylates / Q000737:chemistry / Q000627:therapeutic use; D009805:Odontogenesis; D011095:Polyethylenes / Q000737:chemistry / Q000627:therapeutic use; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use*; D018915:Root Canal Preparation; D013223:Statistics as Topic; D013314:Stress, Mechanical; D019237:Tooth Cervix / Q000473:pathology; D014082:Tooth Fractures / Q000503:physiopathology; D014092:Tooth Root / Q000473:pathology; D019553:Tooth, Nonvital / Q000628:therapy*
D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D011095:Polyethylenes; C088833:Prisma TPH resin composite; C084063:RIBBOND; D012387:Root Canal Filling Materials; C074811:Tenure adhesive