Root canal instrumentation efficacy of non-fused and fused primary molar roots: a micro-computed tomography study

Dalzell O 1 , Mohd Ariffin S 2 , Patrick CJ 3 , Hardiman R 4 , Manton DJ 1 , Parashos P 5 Show all authors , Rajan S 6

Affiliations 

  • 1 Paediatric Dentistry, Melbourne Dental School, The University of Melbourne, Melbourne, VIC, Australia
  • 2 Department of Paediatric Dentistry, Hospital Sultan Haji Ahmad Shah, Temerloh, Pahang, Malaysia
  • 3 Statistical Consulting Centre, School of Mathematics and Statistics, The University of Melbourne, Melbourne, VIC, Australia
  • 4 Oral Anatomy, Medicine and Surgery, Melbourne Dental School, The University of Melbourne, Melbourne, VIC, Australia
  • 5 Restorative Dentistry, Melbourne Dental School, The University of Melbourne, Melbourne, VIC, Australia
  • 6 Paediatric Dentistry, Melbourne Dental School, The University of Melbourne, Melbourne, VIC, Australia. sadna.v@unimelb.edu.au
Eur Arch Paediatr Dent, 2021 Oct;22(5):911-927.
PMID: 34146251 DOI: 10.1007/s40368-021-00641-2

Abstract

PURPOSE: Pulpectomy may be indicated in restorable primary teeth exhibiting irreversible pulpitis or pulpal necrosis. The purpose of this study was to compare the cleaning and shaping efficacy of NiTi systems (Reciproc® Blue and MTwo®) with manual stainless-steel instrumentation in primary molars using micro-CT analysis.

METHODS: Fifty-seven maxillary second primary molars were scanned using micro-CT. Teeth with three divergent roots were divided randomly (n = 15) according to instrument type (K file, MTwo®, and Reciproc® Blue). Teeth with root fusion were instrumented manually as a separate group (n = 12). Pre- and post-instrumentation micro-CT images were superimposed, and the instrumentation area (IA) and procedural complications were recorded.

RESULTS: No statistically significant differences in IA between file systems was observed in the non-fused teeth. The mean IA of fused roots was significantly lower than in the non-fused distobuccal (p = 0.003) and palatal (p  60%) occurred in both non-fused and fused primary teeth with fewer procedural complications observed after manual instrumentation.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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