Evaluation of the Efficiency to Remove the Infected Dentin via Enterococcus faecalis Bacterial Count and to Adequately Shape the Canal Using Hand Kedo-SH Files, Rotary Kedo-SG (Blue) and Pro AF Baby Gold Files in Primary Molars: An In Vitro Study
Background: Premature loss of primary teeth results in space loss, thus affecting the integrity of the oral tissues. According to the American Academy of Pediatric Dentistry, the treatment for a carious primary molar with pulpal involvement is pulpectomy. The success of this procedure depends on the elimination of bacteria, the most common being Enterococcus faecalis (E. faecalis), by cleaning and shaping the root canals with rotary or hand instrumentation.
Aims and objectives: Evaluating and comparing the cleaning efficacy and obturation quality using Kedo-SH hand files and rotary Kedo-SG (blue) and Pro AF Baby Gold files in primary molar teeth.
Materials and methods: A total of 51 extracted primary molar teeth were selected and divided into three equal groups. Group I, the control group, was instrumented with Kedo-SH hand files. Groups II and III were instrumented with Kedo-SG (blue) and Pro AF Baby Gold files, respectively. Baseline data and postinstrumentation data were sent for microbiological analysis to check microbial levels of bacteria E. faecalis. Obturation quality was then scored using Barrieshi-Nusair criteria and the T-scoring system by Robia.
Results: Associating obturating length between each group, maximum samples in group I showed adequate fill. Relating to density, maximum samples in group III showed no voids present in the obturation. Distribution of the T-scoring system shows maximum samples in group III having all three qualities of ideal obturation. On comparing microbiological analysis among the groups, group I showed higher colony counts of E. faecalis compared to groups II and III.
Conclusion: In the present study, rotary instrumentation in the canals showed more consistent results than hand instrumentation. Among the rotary files, Pro AF Baby Gold files show a greater reduction in E. faecalis, with a good obturation quality. Thus, the use of nickel-titanium (Ni-Ti) files is a good option for root canal instrumentation in primary teeth.
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