Ultrasound Effect in the Removal of Intraradicular Posts Cemented with Different Materials.
This study evaluated the effect of ultrasonic vibration on the tensile strength required to remove intraradicular post cemented with different materials.



Bovine teeth were selected, and 7 mm of the cervical root canals were prepared to size 5 Largo drill, the posts were cemented with zinc phosphate, Enforce (resin) or Rely X (glass ionomer). The specimens were divided into six groups (n = 10), according to the following procedures: GI-cementation with zinc phosphate associated with traction force; GII-cementation with zinc phosphate associated with ultrasonic activation and traction force; G111-cementation with Enforce associated with traction force; GIV-cementation with Enforce associated with ultrasonic activation and traction force; GV-cementation with Rely X associated with traction force; and GVI-cementation with Rely X associated with ultrasonic activation and traction force. The tensile test was conducted using the electromechanical testing machine, the force was determined by a specialized computer program and ultrasonic activation using the Jet Sonic Four Plus (Gnatus) device in 10P.



Concerning to average ranking, GI showed statistically significant difference in comparison with GII and GVI (p < 0.05); there was no statistical difference in GIII and GIV when compared to other groups (p > 0.05).



The ultrasound favored the intraradicular post traction regardless of the employed cement in greater or lesser extent.



The post removal is a routine practice in the dental office, therefore, new solutions and better alternatives are need to the practitioner. We did not find in the literature many articles referring to this practice. Thus, the results from this study are relevant in the case planning and to promote more treatment options.
Assistant Professor, Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Rua Humaita 1680, Centro CEP 14801-903, Araraquara, SP, Brazil, e-mail: fberbert@foar.unesp.br.
Fabio Luiz Camargo Vilella
FL
Berbert
Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Araraquara SP, Brazil.
Camila Galletti
CG
Espir
Department of Health Sciences, Araraquara Dental School University Center of Araraquara, Araraquara, Brazil.
Fernando Simões
FS
Crisci
Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Araraquara SP, Brazil.
Marcelo
M
Ferrarezz
Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Araraquara SP, Brazil.
T
T
de Andrade
Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Araraquara SP, Brazil.
Gisselle Moraima
GM
Chávez-Andrade
Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Araraquara SP, Brazil.
Renato de Toledo
Rde T
Leonardo
Department of Dental Materials and Prosthesis, Dental School, Universidade Estadual Paulista, Araraquara, Brazil.
José Roberto Cury
JR
Saad
Department of Dental Materials and Prosthesis, Dental School, Universidade Estadual Paulista, Araraquara, Brazil.
José Claudio Martins
JC
Segalla
Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Araraquara SP, Brazil.
Luiz Geraldo
LG
Vaz
Department of Restorative Dentistry, Araraquara Dental School, Universidade Estadual Paulista, Araraquara SP, Brazil.
Keren Cristina Fagundes
KC
Jordão Basso
Andrea Abi Rached
AA
Dantas
D000818:Animals; D002417:Cattle; D002484:Cementation / Q000379:methods; D001840:Dental Bonding; D003738:Dental Cements / Q000032:analysis / Q000737:chemistry*; D003739:Dental Cementum; D017268:Dental Prosthesis Retention; D003799:Dental Stress Analysis / Q000295:instrumentation / Q000379:methods*; D011176:Post and Core Technique; D012387:Root Canal Filling Materials; D013718:Tensile Strength; D014070:Tooth / Q000737:chemistry; D014465:Ultrasonics / Q000379:methods*
D003738:Dental Cements; D012387:Root Canal Filling Materials
Dental cements; Tensile strength; Ultrasonics.