A novel approach in assessment of coronal leakage of intraorifice barriers: a saliva leakage and micro-computed tomographic evaluation.
The efficacy of amalgam, Fuji-Plus, Geristore, and mineral trioxide aggregate (MTA) as intraorifice barriers was compared in a simulated saliva leakage model. Fifty teeth were divided into 4 experimental (n = 10 each) and 2 control groups (n = 5 each). Two millimeters of the materials was placed as intraorifice barriers and brought into contact with human saliva in a coronal reservoir. Bacterial leakage into the apical reservoir was assessed daily for 3 months. Geristore barriers leaked significantly more often (5/10) than Fuji-Plus (0/10, P < .05) at 60 days. The first Fuji-Plus sample leaked after 70 days; after 90 days, 3 (Fuji-Plus), 4 (MTA, amalgam), and 6 (Geristore) samples leaked. There were no significant differences between the experimental groups at that time point. Three-dimensional gap volumes in the barrier-dentin interface and the porosity of the barrier materials were compared by using micro-computed tomography (microCT). A measurable gap was evident in only 1 specimen with an MTA barrier. MTA was significantly less porous than Fuji-Plus and Geristore (P < or = .05), whereas amalgam was too radiopaque to allow microCT measurements. In conclusion, Fuji-Plus might be an effective intraorifice barrier (up to 70 days in vitro), but all 4 materials showed leakage in some specimens at 90 days.
Private Endodontic Practice, 5332 Corte Playa Jacinto, San Diego, CA 92124, USA. Parisazk@yahoo.com
Parisa
P
Zakizadeh
Sally J
SJ
Marshall
Charles I
CI
Hoover
Ove A
OA
Peters
W Craig
WC
Noblett
Stuart A
SA
Gansky
Harold E
HE
Goodis
D017607:Aluminum Compounds; D017610:Calcium Compounds; D003723:Dental Amalgam; D003763:Dental Leakage / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D004338:Drug Combinations; D005899:Glass Ionomer Cements; D006801:Humans; D008852:Microradiography; D010087:Oxides; D016062:Porosity; D012117:Resins, Synthetic; D012387:Root Canal Filling Materials / Q000009:adverse effects*; D012463:Saliva; D017640:Silicates; D014057:Tomography, X-Ray Computed
D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; C113301:FujiPlus; C074933:Geristore; D005899:Glass Ionomer Cements; D010087:Oxides; D012117:Resins, Synthetic; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D003723:Dental Amalgam