No causal relationship between dentinal microcrack formation and canal preparation procedures with Reciproc, WaveOne, and BioRaCe systems was observed.
Relationship Between Cracks and Root Canal Therapy
In extracted teeth, dentinal defects were observed in roots filled with gutta-percha and AH26 using the lateral compaction and continuous wave techniques. But no difference was reported between the two techniques.
Root canal preparation and filling of extracted teeth created dentine defects such as fractures, craze lines and incomplete cracks
In cases of mandibular incisors, overinstrumented root(s), thin dentinal walls, recommended obturation by finger spreaders to decrease risk of fracture.