Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars
Marco Antonio Hungaro Duarte, Ricardo Affonso Bernardes, Ronald Ordinola-Zapata, Bruno Carvalho de Vasconcelos, Clovis Monteiro Bramante, Ivaldo Gomes de Moraes
This study evaluated the increase of the instrumented area and dentin thickness in the mesial and distal aspects of mesial canals of mandibular molars after the use of Gates Glidden (GG), LA Axxess (LA) and Orifice Shaper (OS) instruments. A total of 53 canals from 27 mandibular molars were embedded in resin and divided into 3 groups. The roots were sectioned 3 mm below the cementoenamel junction and the images were captured before and after instrumentation. The increase of the instrumented area in terms of percentages and the remaining dentin thickness, in mm, at the mesial and furcal aspects were calculated using the Image tools software. Data were analyzed using the Kruskal-Wallis and Dunn's test. The significance level was set at 5%. All instruments promoted cervical flaring with different amounts of dentin removal at the mesial and distal aspects of the root canals. Statistically significant difference (p<0.05) was found between LA and all other instruments after using the first instrument. Regarding dentin thickness, no significant difference (p>0.05) was found between the mesial and distal walls in all groups. It may be concluded that LA 35.06 and GG 3 burs produced the thinnest dentin walls, and thus their use in mesial canals of mandibular molars should be done with caution.
Brazilian Dental Journal
https://doi.org/10.1590/s0103-64402011000100004
Cervical preparation
Cleaning and shaping procedures
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Dental Pulp Cavity Medicine & Life Sciences 100%
Dentin Medicine & Life Sciences 94%
Tooth Cervix Medicine & Life Sciences 34%
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Duarte, M. A. H., Bernardes, R. A., Ordinola-Zapata, R., de Vasconcelos, B. C., Bramante, C. M., & de Moraes, I. G. (2011). Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars. Brazilian Dental Journal, 22(1), 28-31. https://doi.org/10.1590/s0103-64402011000100004
Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars. / Duarte, Marco Antonio Hungaro; Bernardes, Ricardo Affonso; Ordinola-Zapata, Ronald et al.
In: Brazilian Dental Journal, Vol. 22, No. 1, 2011, p. 28-31.
Duarte, MAH, Bernardes, RA, Ordinola-Zapata, R, de Vasconcelos, BC, Bramante, CM & de Moraes, IG 2011, 'Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars', Brazilian Dental Journal, vol. 22, no. 1, pp. 28-31. https://doi.org/10.1590/s0103-64402011000100004
Duarte MAH, Bernardes RA, Ordinola-Zapata R, de Vasconcelos BC, Bramante CM, de Moraes IG. Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars. Brazilian Dental Journal. 2011;22(1):28-31. doi: 10.1590/s0103-64402011000100004
Duarte, Marco Antonio Hungaro ; Bernardes, Ricardo Affonso ; Ordinola-Zapata, Ronald et al. / Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars. In: Brazilian Dental Journal. 2011 ; Vol. 22, No. 1. pp. 28-31.
@article{f6ee3f35d0344dd1b0397e27cc044116,
title = "Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars",
abstract = "This study evaluated the increase of the instrumented area and dentin thickness in the mesial and distal aspects of mesial canals of mandibular molars after the use of Gates Glidden (GG), LA Axxess (LA) and Orifice Shaper (OS) instruments. A total of 53 canals from 27 mandibular molars were embedded in resin and divided into 3 groups. The roots were sectioned 3 mm below the cementoenamel junction and the images were captured before and after instrumentation. The increase of the instrumented area in terms of percentages and the remaining dentin thickness, in mm, at the mesial and furcal aspects were calculated using the Image tools software. Data were analyzed using the Kruskal-Wallis and Dunn's test. The significance level was set at 5%. All instruments promoted cervical flaring with different amounts of dentin removal at the mesial and distal aspects of the root canals. Statistically significant difference (p<0.05) was found between LA and all other instruments after using the first instrument. Regarding dentin thickness, no significant difference (p>0.05) was found between the mesial and distal walls in all groups. It may be concluded that LA 35.06 and GG 3 burs produced the thinnest dentin walls, and thus their use in mesial canals of mandibular molars should be done with caution.",
keywords = "Cervical preparation, Cleaning and shaping procedures, Dental anatomy",
author = "Duarte, {Marco Antonio Hungaro} and Bernardes, {Ricardo Affonso} and Ronald Ordinola-Zapata and {de Vasconcelos}, {Bruno Carvalho} and Bramante, {Clovis Monteiro} and {de Moraes}, {Ivaldo Gomes}",
doi = "10.1590/s0103-64402011000100004",
journal = "Brazilian Dental Journal",
publisher = "Associacao Brasileira de Divulgacao Cientifica",
T1 - Effects of Gates-Glidden, La Axxess and orifice shaper burs on the cervical dentin thickness and root canal area of mandibular molars
AU - Duarte, Marco Antonio Hungaro
AU - Bernardes, Ricardo Affonso
AU - Ordinola-Zapata, Ronald
AU - de Vasconcelos, Bruno Carvalho
AU - Bramante, Clovis Monteiro
AU - de Moraes, Ivaldo Gomes
N2 - This study evaluated the increase of the instrumented area and dentin thickness in the mesial and distal aspects of mesial canals of mandibular molars after the use of Gates Glidden (GG), LA Axxess (LA) and Orifice Shaper (OS) instruments. A total of 53 canals from 27 mandibular molars were embedded in resin and divided into 3 groups. The roots were sectioned 3 mm below the cementoenamel junction and the images were captured before and after instrumentation. The increase of the instrumented area in terms of percentages and the remaining dentin thickness, in mm, at the mesial and furcal aspects were calculated using the Image tools software. Data were analyzed using the Kruskal-Wallis and Dunn's test. The significance level was set at 5%. All instruments promoted cervical flaring with different amounts of dentin removal at the mesial and distal aspects of the root canals. Statistically significant difference (p<0.05) was found between LA and all other instruments after using the first instrument. Regarding dentin thickness, no significant difference (p>0.05) was found between the mesial and distal walls in all groups. It may be concluded that LA 35.06 and GG 3 burs produced the thinnest dentin walls, and thus their use in mesial canals of mandibular molars should be done with caution.
AB - This study evaluated the increase of the instrumented area and dentin thickness in the mesial and distal aspects of mesial canals of mandibular molars after the use of Gates Glidden (GG), LA Axxess (LA) and Orifice Shaper (OS) instruments. A total of 53 canals from 27 mandibular molars were embedded in resin and divided into 3 groups. The roots were sectioned 3 mm below the cementoenamel junction and the images were captured before and after instrumentation. The increase of the instrumented area in terms of percentages and the remaining dentin thickness, in mm, at the mesial and furcal aspects were calculated using the Image tools software. Data were analyzed using the Kruskal-Wallis and Dunn's test. The significance level was set at 5%. All instruments promoted cervical flaring with different amounts of dentin removal at the mesial and distal aspects of the root canals. Statistically significant difference (p<0.05) was found between LA and all other instruments after using the first instrument. Regarding dentin thickness, no significant difference (p>0.05) was found between the mesial and distal walls in all groups. It may be concluded that LA 35.06 and GG 3 burs produced the thinnest dentin walls, and thus their use in mesial canals of mandibular molars should be done with caution.
KW - Cervical preparation
KW - Cleaning and shaping procedures
KW - Dental anatomy
U2 - 10.1590/s0103-64402011000100004
DO - 10.1590/s0103-64402011000100004
JO - Brazilian Dental Journal
JF - Brazilian Dental Journal