Effect of ultrasonic vibration and various sealer and cement combinations on titanium post removal.
The purpose of this study was to determine the effect of ultrasonic vibration on the force required to remove prefabricated posts. Ninety-six extracted human canines were divided into eight groups, which were prepared and obturated with gutta-percha and either a eugenol-containing (Roth's 801 Elite) or eugenol-free (AH26) sealer. Titanium #6 Parapost XH posts were cemented with either zinc phosphate or Panavia 21 resin cement. One half of the sample was subjected to ultrasonic vibration for 16 min at the post-dentin interface, whereas the other half received no vibration (controls). Each combination of sealer, cement, and vibration status was subjected to tensile load to failure using an Instron testing machine. Posts cemented in teeth obturated with gutta-percha and AH26 sealer demonstrated significantly greater resistance to dislodgement, compared with teeth obturated with gutta-percha and Roth's 801 Elite sealer. There was no statistical difference in retention of posts cemented with either zinc phosphate or Panavia 21, regardless of the sealer used. Additionally ultrasonic vibration increased post retention for both cements.
Bergeron
B E
BE
Department of Endodontics, Wilford Hall USAF Medical Center, Lackland Air Force Base, TX, USA.
Murchison
D F
DF
Schindler
W G
WG
Walker
W A
WA
D000704:Analysis of Variance; D001729:Bismuth / Q000737:chemistry; D002484:Cementation; D016001:Confidence Intervals; D003481:Cuspid; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D019232:Dental Restoration Failure; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements / Q000737:chemistry; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008709:Methenamine / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation; D018915:Root Canal Preparation; D012834:Silver / Q000737:chemistry; D013314:Stress, Mechanical; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry; D014465:Ultrasonics; D014732:Vibration; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
D003738:Dental Cements; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; C093719:Panavia TPN-S; D010710:Phosphates; D019279:Resin Cements; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D012834:Silver; C028044:epoxy resin AH-26; C074935:Roth's 801 Sealer; D015036:Zinc Phosphate Cement; D006171:Gutta-Percha; D014025:Titanium; D008709:Methenamine; D001729:Bismuth