title: Fracture resistance of simulated immature teeth filled with resilon, gutta-percha, or composite.
abstract: The purpose of this study was to evaluate the fracture resistance gained by filling root canals of simulated immature teeth with either Resilon, gutta-percha, a self-curing flowable composite resin (BisFil 2B), or a self-curing hybrid composite resin (BisFil II). Seventy-two sheep incisors were divided into six groups of 12 teeth each. Negative controls received no treatment. Teeth in all other groups were prepared until a size 120 LightSpeed LSX instrument could be passed out the apex. After apical placement of a mineral trioxide aggregate (MTA) barrier, the canals were filled with their respective test material to the facial CEJ. The positive control canals were left unfilled. The access openings (including positive controls) were restored with BisFil II. Each root was horizontally fractured through the test material using an Instron. The mean peak loads to fracture were recorded. The hybrid composite resin (BisFil II) was the only material significantly more fracture resistant than positive controls (p < 0.017).
authors: Department of Endodontics, Wilford Hall Medical Center, 2450 Pepperell Street, Lackland AFB, TX 28236, USA.
authors: Kim L
authors: KL
authors: Wilkinson
authors: Thomas J
authors: TJ
authors: Beeson
authors: Timothy C
authors: TC
authors: Kirkpatrick
mesh_terms: D017607:Aluminum Compounds / Q000627:therapeutic use; D000818:Animals; D017610:Calcium Compounds / Q000627:therapeutic use; D003188:Composite Resins / Q000627:therapeutic use; D003799:Dental Stress Analysis / Q000295:instrumentation; D004338:Drug Combinations; D006171:Gutta-Percha / Q000627:therapeutic use*; D010087:Oxides / Q000627:therapeutic use; D011897:Random Allocation; D019279:Resin Cements / Q000627:therapeutic use*; D012184:Retrograde Obturation / Q000379:methods; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000295:instrumentation; D012756:Sheep; D017640:Silicates / Q000627:therapeutic use; D013314:Stress, Mechanical; D019227:Tooth Apex / Q000033:anatomy & histology; D019237:Tooth Cervix / Q000033:anatomy & histology; D014082:Tooth Fractures / Q000503:physiopathology*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003188:Composite Resins; D004338:Drug Combinations; D010087:Oxides; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D017640:Silicates; C086631:mineral trioxide aggregate; C486892:resilon sealer; C078905:Bisfil; D006171:Gutta-Percha