1. AMIRA M. MOSTAFA - Pediatric Dentistry, Oral Health and Preventive Dentistry Department, Faculty of Dentistry, Tanta University.
2. AMINA M. ELHOSARY - Pediatric Dentistry, Oral Health and Preventive Dentistry Department, Faculty of Dentistry, Tanta University.
3. HUSSEIN I. SAUDI - Professor of Oral Medicine, periodontology, Oral Diagnosis and Radiology Department Faculty of Dentistry,
Tanta University.
4. WESSAM H. AMER - Professor of Microbiology and Immunity, Faculty of Medicine, Tanta University Tanta, Egypt.
Background: The present study aimed to compare conventional K-hand files and pediatric Kedo-S rotary files using cone beam computed tomography. Materials and methods: Twenty extracted mandibular molars with intact distal roots were randomly divided into 2 groups (10 in each group), the teeth were instrumented by K- files & Kedo-S files and were scanned before and after instrumentation using cone beam computed tomography. SIMPLANT software was used to analyze the images of the distal roots to assess the incidence of canal transportation, centering ability, and detect the amount of removed dentin. Results: Kedo-S files group reflected less incidence of instrumentation errors (less transportation and better centering ability); however, Kedo-S files removed greater amount of dentin (0.4822±0.0234) than manual files (0.1814±0.0158) with significant difference between both groups (P-value<0.05). Conclusions: Kedo-S files achieved less transportation and better centering ability ratio than K-files, while they removed more radicular dentin that may weaken the teeth later.
Kedo-S File, Hand K-File, Primary Teeth, Root Canal Treatment, Cone-Beam Computed Tomography.