Efficacy of Single File Reciprocating System in Root Canal Preparation of Primary Teeth

Objectives: The purpose of this in vitro study was to compare and evaluate the cleaning and shaping efficiency of the rotary Ni-Ti, sonic and conventional file systems for root canal preparation in primary teeth under CBCT. Study Design: Seventy five maxillary and mandibular first and second primary molars were divided into three groups of 25 teeth each, according to the canal preparation technique: Group I Rotary file system, Group II Sonic file system, Group III Conventional K files. Canals were scanned using an i-CAT CBCT scanner before and after preparation to evaluate their shaping efficiency. Root canal transportation and centering ratio were evaluated at coronal, middle and apical thirds. The cleaning efficiency was evaluated by the extent of India ink removal from the canal walls under stereomicroscope. The collected data was subjected to statistical analysis. Results: Nickel–Titanium (Ni-Ti) rotary system caused less canal transportation and had better centering ability. Sonic system showed better shaping at the apex, and wider at coronal end. Conventional K-files removed more dentin at coronal than in middle and apex and efficiently cleaned the root canals. There were no significant difference in cleaning and shaping efficiency between Rotary system, Sonic system & Conventional K file system. Conclusion: Rotary instrumentations could be considered as an efficient alternative to conventional hand preparation as it respects the original canal anatomy with no aberrations or resulting failures.

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Evaluation of microcrack formation during root canal preparation using hand, rotary files and self-adjusting file in primary teeth: An in vitro study

Journal of Dental Research Dental Clinics Dental Prospects ◽

10.34172/joddd.2021.007 ◽

2021 ◽

Vol 15 (1) ◽

pp. 35-41

Author(s):

Anup Panda ◽

Krishna Shah ◽

Varsha Budakoti ◽

Krishna Dere ◽

Mira Virda ◽

...

Keyword(s):

Root Canal ◽

Primary Teeth ◽

In Vitro Study ◽

Permanent Teeth ◽

Control Group ◽

Root Canal Preparation ◽

Root Dentin ◽

Root Canal Morphology ◽

Group 2

Background. Pediatric endodontics is a field with constant evolution, resulting in the shifting of paradigms from the use of conventional hand files to rotary files for biomechanical preparation in primary teeth. Biomechanical preparation plays a crucial role in the success of root canal treatment. Primary teeth need special attention since they differ from permanent teeth in root canal morphology. Cleaning and shaping of the canals damage the root dentin, leading to dentinal cracks. Newer techniques for root canal preparation, including Ni-Ti rotary files and SAF system, have been developed for use in pediatric endodontics to overcome the drawbacks of conventional methods. The present study compared dentinal defects formed by rotary systems in primary teeth. Methods. Eighty primary teeth were included. The teeth were decoronated with a diamond disc. All the roots were inspected for any pre-existing cracks or craze lines under transmitted light under a stereomicroscope. The specimens were then divided into four groups (n=20): group 1: control, group 2: hand files (HF), group 3: ProTaper files, and group IV: SAF files. The samples were instrumented according to the group they were assigned to. Results. The HF and SAF groups exhibited fewer microcracks. Dentinal microcracks were observed in roots prepared with rotary ProTaper files. There were significant differences between HF/SAF and rotary files (P<0.05). Conclusion. Stainless steel hand K-files and SAF instruments resulted in fewer dentinal damage than the ProTaper Universal files. SAF exhibited satisfactory results with minimal or no crack formation.

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