An in vitro evaluation of injectable thermoplasticized gutta-percha, glass ionomer, and amalgam when used as retrofilling materials.
An in vitro dye leakage study was performed to evaluate the sealing ability of the following retrofilling materials: high- and low-temperature injectable thermoplasticized gutta-percha with and without sealer, a glass ionomer cement, and amalgam with and without varnish. The roots of 105 extracted human maxillary anterior teeth were instrumented and obturated with single cones of gutta-percha and sealer. The apical 3 mm of the roots were then resected and 2-mm deep retrograde preparations were prepared. Each root was then randomly placed into one of seven groups and retrofilled with one of the test materials. After 72 h in India ink, the roots were cleared and evaluated for leakage using a stereomicroscope. Statistical analysis of the results indicated that injectable high-temperature gutta-percha without sealer demonstrated significantly more leakage than the other materials. There were no significant differences in leakage among the other evaluated materials.
Olson
A K
AK
U.S. Army Dental Activity, Fort Campbell, KY.
MacPherson
M G
MG
Hartwell
G R
GR
Weller
R N
RN
Kulild
J C
JC
D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control; D005899:Glass Ionomer Cements; D006171:Gutta-Percha / Q000008:administration & dosage*; D006801:Humans; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials
D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials; D003723:Dental Amalgam; D006171:Gutta-Percha