Root canal area increase promoted by the EndoSequence and ProTaper systems: comparison by computed tomography.
BACKGROUND
The aim of this study was to compare the increase of the root canal area after instrumentation with EndoSequence or ProTaper rotary systems.


METHODS
Twenty-two mesial root canals from mandibular molars were instrumented. Teeth were mounted on a base, numbered, and divided into 2 groups; teeth from 1-11 (PT group) were instrumented by using the ProTaper system, and teeth from 12-22 (ES group) were instrumented by using the EndoSequence system. Cone beam computed tomography was performed on all teeth before and after instrumentation. Measurements at 3, 5, and 7 mm as well as differences in instrument performance were statistically compared by the Student t test at 5% significance level.


RESULTS
Both systems increased significantly the root canal area (P < .05) at all levels. Comparison between the rotary systems showed significantly greater increase (P < .05) for EndoSequence at 3 mm, with no statistically significant difference (P < .05) at the other levels.


CONCLUSIONS
Both rotary systems increased significantly the root canal area.
Bernardes
Ricardo Affonso
RA
CPO SL Mandic Brasiliense Dental School, Brasília, DF, Brazil. dr.ricardoaffonso@uol.com.br
Rocha
Emerson Antunes
EA
Duarte
Marco Antonio Hungaro
MA
Vivan
Rodrigo Ricci
RR
de Moraes
Ivaldo Gomes
IG
Bramante
Alexandre S
AS
de Azevedo
José Ribamar
JR
D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008963:Molar; D009811:Odontometry / Q000379:methods; D011312:Pressure; D012388:Root Canal Irrigants / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D019227:Tooth Apex / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D019237:Tooth Cervix / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D019415:Torque
D012388:Root Canal Irrigants; D012973:Sodium Hypochlorite