Efficacy of Race rotary files in root canal preparation of primary molars

Not Applicable

Conditions: infectious necrotic primary molars.
Necrosis of pulp

Registration Number: IRCT20180429039468N1

Lead Sponsor: Qazvin University of Medical Sciences

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Pending

Sex: All

Target Recruitment: 20

Inclusion Criteria

healthy child
none of a history of the chronic systemic disease
the cooperation basis on frankle criteria ( 3 and 4 groups)
the restorable tooth with the suitable structure for rubber dam
caries with the history of spontaneous and night pain
at least two-thirds of the root present
normal morphology
moderate root angulation (root curvature radius 10-20m, the angle of the curvature 25-39 degrees)
radiographic signs of pulp complication, consist of thin trabeculae, radiolucency of furcation and PDL widening
acute alveolar abscess and fistulae

Exclusion Criteria

physical or mental disability of the child
antibiotic receipt in two last weeks
former pulp therapy
inadequate root length
obstructed and calcified canal
fractured root
pathological internal or external root resorption
internal or external furcation perforation
severe bone resorption, affecting the permanent tooth crypt
type II canals
presence of two distally canals in mandibular molars

Study & Design

Study Type: interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Change of the microbial load of canal following instrumentation by manual or rotary file. Timepoint: Sampling before and after chemomechanical preparation of canal at the same session. Method of measurement: Count of colony forming units after aerobic and anaerobic bacterial culture.;Instrumentation time throughout the manual or rotary file. Timepoint: At the period of canal preparation by the manual or rotary file. Method of measurement: Chronometer.;Cooperation scale of the child throughout instrumentation. Timepoint: At the period of canal preparation by the manual or rotary file. Method of measurement: Ohio state university behavioral rating scale(OSUBRS).

Secondary Outcome Measures