Dimensional stability of glass ionomer used as a core material.
This laboratory study evaluated the dimensional stability of two reinforced glass ionomers (Ketac-Silver and Fuji Miracle Mix) in comparison with amalgam. Ten core build-ups were prepared with each material on extracted human teeth. Four Minim pins were placed in each tooth for retention. A gold casting was made for each core build-up. The specimens were placed in a distilled water and the distance between the casting and the tooth was measured at 1 hour, 6 hours, and then every 24 hours for 7 days. After 7 days, the measured changes were small, ranging from 1 to 63 microns. The reinforced glass ionomers were found to be dimensionally stable in moisture over a period of 7 days.
Cooley
R L
RL
Department of General Practice, University of Texas Health Science Center, School of Dentistry, San Antonio.
Robbins
J W
JW
Barnwell
S
S
D000704:Analysis of Variance; D016722:Cermet Cements; D003722:Dental Alloys / Q000737:chemistry; D003723:Dental Amalgam / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006047:Gold Alloys; D006801:Humans; D010865:Pilot Projects; D011176:Post and Core Technique; D012834:Silver / Q000737:chemistry; D013499:Surface Properties
D016722:Cermet Cements; D003722:Dental Alloys; C068060:Fuji Miracle Mix; D005899:Glass Ionomer Cements; D006047:Gold Alloys; D012834:Silver; D003723:Dental Amalgam