Comparative evaluation of two pediatric rotary file systems in primary teeth: A scanning electron microscope study

Priya Subramaniam1Orcid, Neetu Raveendran2Orcid, Madhusudhan K.S3Orcid


Rotary file systems having instruments of shorter length, variable taper and individual files for anterior and posterior teeth make them suitable for routine use in pulpectomy.
Kedo-S and Pro AF Baby Gold rotary files were significantly better than manual Ni-Ti K files when the smear layer was evaluated by a scanning electron microscope.
These new file systems can be used in endodontic practice in primary teeth for faster and better instrumentation.


Aim: The objective of this in-vitro study was to evaluate and compare the smear layer formed using Kedo-S, Pro AF Baby Gold rotary files and manual Ni-Ti files in the root canals of primary anterior teeth. Methods: Sixty primary maxillary incisors which fulfilled the inclusion criteria were randomly assigned into 3 groups of 20 teeth each; Group 1: Kedo-S rotary files, Group 2: Pro AF Baby Gold rotary files and Group 3: manual Ni-Ti K files. The root canals in each group were instrumented for 3 minutes and irrigated intermittently with 0.9% saline. The teeth were then longitudinally sectioned and examined under a scanning electron microscope for smear layer formation at different thirds of the root canals. Scores obtained were then subjected to statistical analysis. Results: Inter-group comparison showed a significant difference between the coronal and middle third in all three groups. A statistically significant difference was also noted in the three groups at the different thirds of the root canals on the intra-group comparison. Conclusions: Both Kedo-S and Pro AF Baby Gold rotary files were significantly better than manual Ni-Ti K files in effectively debriding the root canal walls of primary teeth as evaluated by the smear layer.

Keywords: Deciduous Tooth; Pulpectomy; Root Canal Therapy; Smear Layer

Author Affiliations

  1. Professor, Department of Pedodontics and Preventive Dentistry, The Oxford Dental College and Hospital, India
  2. Former Post Graduate Student, Department of Pedodontics and Preventive Dentistry, The Oxford Dental College and Hospital, India ( Correspondence:
  3. Reader, Department of Pedodontics and Preventive Dentistry, The Oxford Dental College and Hospital, India
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Article Info

Contemp Pediatr Dent 2022:3(1):8-14

Received: 21 December 2021

Accepted: : 8 March 2022

Online First: 16 March 2022


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					Priya Subramaniam, Neetu Raveendran, Madhusudhan. K.S. Comparative evaluation of two pediatric rotary file systems in primary teeth: A scanning electron microscope study. Contemp Pediatr Dent 2022:3(1):8-14

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