Evaluation of the apical seal after intraradicular retainer removal with ultrasound or carbide bur
There are situations in which intraradicular retainers have to be removed and replaced. The objective of this research was to evaluate the apical seal after the removal of a custom cast post and core with a carbide bur or with an ultrasound apparatus. Twenty five roots of extracted human incisors were used. They were endodontically treated and prepared to receive the posts. The posts and cores were cast with 2 types of dental alloys, CuAlZn and PdAg, and were cemented with zinc phosphate cement. After 24 hours, they were removed using the two above mentioned techniques. Then, the roots had their external surface made impermeable by two layers of cyanoacrylate adhesive, leaving only the cervical area for dye penetration. The teeth were immersed in rhodamine for 24 hours. They were then cut and observed under an optical microscope and analyzed with appropriate software (Imagelab). The results were submitted to ANOVA, and they evidenced that, regarding the alloy factor, PdAg posts presented a larger mean infiltration value (2.23 ± 0.48 mm) as compared to the posts made of CuAlZn (1.39 ± 0.48 mm) (p = 0.025). Regarding the technique factor, there was no significant difference (p = 0.9) between the removal of the intraradicular retainer using ultrasound (1.99 ± 0.62 mm) or using a rotating cutting instrument (1.62 ± 0.62 mm). Under these experimental conditions, it was possible to conclude that the degree of apical leakage was directly related to the alloy type, and it was present in both techniques used.
Main Authors: | Campos,Tomie Nakakuki, Inoue,Cleber Henrique, Yamamoto,Elcio, Araki,Ângela Toshie, Adachi,Lena Katekawa, Rodriguez,Jose Eduardo Chorres |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Pesquisa Odontológica - SBPqO
2007
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242007000300011 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Influence of microwave sterilization on the cutting capacity of carbide burs
by: Fais,Laiza Maria Grassi, et al.
Published: (2009) -
Influence of the remaining coronal structure on the resistance of teeth with intraradicular retainer
by: Pereira,Jefferson Ricardo, et al.
Published: (2005) -
Sealing ability of cements in root canals prepared for intraradicular posts
by: Nakamura,Dirce Haruko, et al.
Published: (2006) -
Uso de retentor intraradicular não influencia o aparecimento de periodontite apical
by: Estrela,Carlos -
Development of an experimental optoelectronic device to study the amplitude of mandibular movements
by: Missaka,Reinaldo, et al.
Published: (2008)