This study evaluated the effect of ultrasonic vibration on the tensile strength required to remove intraradicular post cemented with different materials.
Materials and methods
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; GIII—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.
Results
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).
Conclusion
The ultrasound favored the intraradicular post traction regardless of the employed cement in greater or lesser extent.
Clinical significance
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.
How to cite this article
Berbert FLCV, Espir CG, Crisci FS, de Andrade MF, Chávez-Andrade GM, de Toledo Leonardo R, Saad JRC, Segalla JCM, Vaz LG, Basso KCFJ, Dantas AAR. Ultrasound Effect in the Removal of Intraradicular Posts Cemented with Different Materials. J Contemp Dent Pract 2015;16(6):437-441.
Comparison of the time required for ultrasonic removal of prefabricated intraradicular posts. J of IMAB 2013;19:426-429.
Restoration of endodontically treated teeth. RSBO 2011;8:33-46.
Intraradicular post and core removal followed by endodontic retreatment: 13-year follow-up. RSBO 2011;8:99-104.
Removal of metal posts in retreatment of teeth with failed endodontic treatment (clinical cases). Int J Sci Res 2015;4:2084-2088.
Do metal post-retained restorations result in more root fractures than fiber post-retained restorations? A systematic review and meta-analysis. J Endod 2015;41:309-316.
Factors influencing the removal of posts. Stomatologija 2005;7:21-23.
Efeito do desgaste da linha de cimento, da vibração ultrasônica e da associação de ambas sobre a força de tração empregada na remoção de pinos intra radiculares. Rev Odontol UNESP 2002;31:205-229.
The Masserann technique for the removal of fractured posts in endodontically treated teeth. J Prosthet Dent 1983;49:46-48.
Post removal prior to retreatment. J Endod 1989;15:552-554.
Evaluation of ultrasonic and sonic instruments for intraradicular post removal. J Endod 1994;20:486-489.
Survey of endodontic retreatment methods used to remove intraradicular posts. J Endod 1993;19:366-369.
Nonsurgical retreatment. J Endod 2004;30:827-845.
Influence of instrumentation techniques and irrigating solutions on bond strength of glass fiber posts to root dentin. Gen Dent 2014;62:50-53.
The influence of ultrasound in removing intraradicular posts. Int Endod J 1995;28:54-56.
Influence of ultrasound, with and without water spray cooling, on removal of posts cemented with resin or glass ionomer cements: an in-vitro study. J Conserv Dent 2010;13:119-123.
2015. Article ID: 340115, 2015. doi : 10.15713/ins.ijcdmr.47
Bioactive and biomimetic restorative materials: a comprehensive review—Part II. J Esthet Restor Dent 2014;26:27-39.
Effect of three endodontic sealers on the bond strength of prefabricated fiber posts luted with three resin cements. J Prosthet Dent 2012;107:322-326.
The adhesion between fiber posts and root canal walls: comparison between microtensile and push-out bond strength measurements. Eur J Oral Sci 2004;112:353-361.
Influence of the remaining coronal structure on the resistance of teeth with intraradicular retainer. Braz Dent J 2005;16:197-201.
Effect of immediate or delayed light activation on curing kinetics and shrinkage stress of dual-cure resin cements. Oper Dent 2011;36:196-204.
Evaluation of fracture resistance of endodontically treated maxillary premolars, restored with ceromer or heat-pressed ceramic inlays and fixed with dual-resin cements. J Oral Rehabil 2004;31:393-397.
Fracture toughness of pin-retained class 4 restorations. Oper Dent 1994;19:110-115.
Fullmouth rehabilitation of a patient with severely worn dentition and uneven occlusal plane: a clinical report. J Prosthodont 2012;21:56-64.
Prevalence of tooth wear in adults. Int J Prosthodont 2009;22:35-42.
Direct adhesive pin-retained restorations for severely worn dentition treatment: a 1.5-year follow-up report. Braz Dent J 2014;25:357-362.
Factors influencing the removal of posts. Int Endod J 2003;36:687-690.