Efficacy of Pediatric Rotary File System Versus Hand Instrumentation for Root Canal Preparation in Primary Teeth

The teeth were randomly allocated in two equal groups : Control group (A):- included 20 mandibular primary molars in which pulpectomy were performed by hand instrumentation system using K- File from size 15 to size 35. Experimental Group (B):- included 20 mandibular primary molars in which pulpectomy were performed by rotary system using Kedo-SG rotary file system according to manufacturer's instructions Methods of Evaluation Stage I :- During and after canal preparation:- The following parameters were evaluated for all cases in both groups:- A- The instrumentation and canal filling time were recorded for both groups using stopwatch. B- Radiographic assessment for filling were done immediately postoperative to record :- 1. Distance between the apex to filling level of the mesial and distal roots . 2. Obturation form Stage II : Follow up : The follow up were carried out by clinical and radiographic evaluation for all cases in both groups:- The clinical evaluation were carried out at (0 base line = after 7 days ) then after 1 , 3 , 6 and 12 months . Radiographic evaluation were performed immediately postoperative as (0 baseline ) after cementation of stainless steel crowns for assessment of filling quality. Radiographs will be used for comparison for consequent radiographs . Follow ups were performed after 6 and 12 months.