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Effects of root canal preparation, various filling techniques and retreatment after filling on vertical root fracture and crack formation
Author(s) -
Capar Ismail Davut,
Saygili Gokhan,
Ergun Hazal,
Gok Tuba,
Arslan Hakan,
Ertas Huseyin
Publication year - 2015
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/edt.12154
Subject(s) - root canal , fracture (geology) , root (linguistics) , dentistry , root canal filling materials , forensic engineering , geotechnical engineering , materials science , orthodontics , geology , engineering , medicine , linguistics , philosophy
Aim To investigate the incidence of cracks in root dentin after rotary instrumentation and filling with cold lateral condensation ( CL ), single‐cone obturation ( SC ), and warm vertical compaction ( WV ) and retreatment of each filling system. Methodology One‐hundred sixty mandibular incisors were selected. Twenty teeth were left unprepared and served as a control, and the remaining 140 teeth were instrumented. Twenty teeth were assigned to an only prepared group. The remaining 120 teeth were assigned to three root canal filling groups and three retreatment groups ( n = 20), as follows: CL , WV , SC , and retreatment of each filling system. All the roots were sectioned perpendicular to the long axis at 2, 4, 6, and 8 mm from the apex, and the sections were then observed under a stereomicroscope. The absence/presence of cracks and vertical root fractures were recorded, and the data were analyzed with a Pearson's chi‐square test ( P = 0.05). Results No complete vertical root fractures were observed in the unprepared and only prepared groups. However, vertical fractures were observed in the filling and retreatment groups. There were significantly more cracks in the retreatment after WV group than the other groups, with the exception of the retreatment after SC , WV , and CL resulted in significantly more cracks than the only prepared and SC . Conclusions The filling techniques (except SC ) caused more cracks than preparation only. The SC caused fewer cracks compared to the other filling techniques. The retreatment following the different filling techniques (except CL ) caused more cracks than the original fillings.