Eur Arch Paediatr Dent. 2025 Nov 26. doi: 10.1007/s40368-025-01141-3. Online ahead of print.
ABSTRACT
BACKGROUND: During pulpectomy process on primary teeth, it is essential to opt for efficient and safe shaping to decrease the risk of iatrogenic errors and enhance irrigation and obturation quality.
PURPOSE: The study aimed to evaluate and compare dentin thickness and centering ability of three file systems: paediatric rotary Rainbow Kids-e-Files® (Kids-e-Dental LLP, Mumbai, India), continuous rotation RACE®EVO (FKG Dentaire SA, La Chaux de Fonds, Switzerland), and reciprocating motion R-motion® (FKG Dentaire SA, La Chaux de Fonds, Switzerland) in second primary mandibular molars pulpectomies using cone-beam computed tomographic (CBCT) analysis.
MATERIALS AND METHODS: A total of 81 mesial and distal canals from second primary mandibular molars were included in the study. CBCT images were taken before and after instrumentation for each group to measure the residual dentin thickness. Based on these measurements, the percentage of dentin removal and centering ability were evaluated for each group to compare the shaping efficiency of the file systems. The Shapiro-Wilk test was used to analyse the results using a one-way analysis of variance on rank (ANOVA), including pairwise multiple comparison procedures (Tukey test).
RESULTS: No significant difference was found in residual dentin thickness and centering ability between the three groups at any level (p value > 0.05). The Rainbow Kids-e-Files® paediatric system demonstrated conservative dentin removal in the middle third and greater coronal enlargement, with good centering ability, slightly lower than R-Motion® and significantly better than RACE®EVO. R-Motion® showed slightly superior centering ability compared to the other two files, while RACE®EVO exhibited the least dentin preservation and canal centering.
CONCLUSION: Rainbow Kids-e-Files® may be considered a reliable and effective alternative to conventional continuous and reciprocating files. The system offers comparable shaping performance while addressing the unique anatomical needs of primary teeth.
PMID:41299153 | DOI:10.1007/s40368-025-01141-3
