Effect of root canal preparation, type of endodontic post and mechanical cycling on root fracture strength

Post-placement is one of the treatment plans supporting the success of a restoration. The design of root canal preparation is a factor in the success of post-use. The purpose of this study was to investigate the root fracture resistance of the root canal preparation for cast post with a seat and non-seat preparation. The study was a laboratory experimental study using 20 upper central incisors that met the criteria in the study. Ten incisors were prepared using seat design while the other ten were prepared using non-seat design. Then tested the compressive test by Universal Testing Machine with test speed 0,5 mm/min. The results of the fracture strength were analyzed using t student statistical test. The analysis showed a significant difference between the non-seat group and the seat group (α=0.05). The average force in the non-seat group was 852.27 N with a standard deviation of 112.6 N while the seat group showed a value of 495.78 N and 82.90 N, respectively. It was concluded therefore that the root fracture resistance in the non-seat root canal preparation design was higher than the seat preparation design.

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Effects of different root canal preparation methods on root fracture resistance: A systematic review of the literature

World Journal of Stomatology ◽

10.5321/wjs.v4.i2.108 ◽

2015 ◽

Vol 4 (2) ◽

pp. 108 ◽

Cited By ~ 1

Author(s):

Xiao-Guang Li

Keyword(s):

Systematic Review ◽

Root Canal ◽

Fracture Resistance ◽

Review Of The Literature ◽

Root Canal Preparation ◽

Preparation Methods ◽

Root Fracture ◽

Root Fracture Resistance

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Effects of root canal preparation, various filling techniques and retreatment after filling on vertical root fracture and crack formation

Dental Traumatology ◽

10.1111/edt.12154 ◽

2014 ◽

Vol 31 (4) ◽

pp. 302-307 ◽

Cited By ~ 21

Author(s):

Ismail Davut Capar ◽

Gokhan Saygili ◽

Hazal Ergun ◽

Tuba Gok ◽

Hakan Arslan ◽

...

Keyword(s):

Root Canal ◽

Crack Formation ◽

Root Canal Preparation ◽

Root Fracture ◽

Vertical Root Fracture

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Influence of Root Canal Sealers and Obturation Techniques on Vertical Root Fracture Resistance. An In Vitro Experiment

Applied Sciences ◽

10.3390/app11178022 ◽

2021 ◽

Vol 11 (17) ◽

pp. 8022

Author(s):

Mazen F. Alkahtany ◽

Khalid H. Almadi ◽

Fahad A. Alahmad ◽

Abdullah M. Alshehri ◽

Abdulrahman A. AlSwayyed ◽

...

Keyword(s):

Fracture Strength ◽

Root Canal ◽

Fracture Resistance ◽

Positive Control ◽

Negative Control ◽

Root Fracture ◽

Vertical Root Fracture ◽

Single Cone ◽

Ah Plus ◽

Root Fracture Resistance

The aim of the present study was to determine the vertical root fracture (VRF) resistance of roots obturated with TotalFill BC Sealer and AH Plus sealer using lateral condensation and single cone techniques in comparison to untreated controls. Sixty single rooted mandibular premolars were sectioned and divided into six groups. Ten teeth were left untreated (positive control-Gp 1) and fifty teeth were cleaned and shaped. Ten root specimens were left unfilled (negative control-Gp 2) and the remaining roots were divided into 4 groups. Gp 3, GP and AH Plus sealer (AH Plus) using the cold lateral compaction (LC) technique; Gp 4, GP and AH Plus using the Single Cone (SC) technique; Gp 5: TotalFill GP and TotalFill BC sealer using the LC technique; Gp 6: TotalFill GP and TotalFill BC sealer with SC. VRF was performed for all specimens using a universal testing machine. Analysis of variance (ANOVA) and Tukeys post-hoc multiple comparison test was used to compare the means among tested study groups. Group 1 (positive control) displayed the highest fracture resistance (946.61 ± 166.465 N); however, the lowest fracture strength was demonstrated by the specimens in group 2 (negative control) (433.31 ± 129.350 N). Specimens treated with AH plus using different obturation techniques (group 3 and 4) showed comparable outcomes (p > 0.05). Similarly, specimens treated with TotalFill BC sealer with different obturation techniques showed statistically similar outcomes (p > 0.05). It was also observed that specimens in groups 3, 4, 5 and 6 demonstrated comparable outcomes of fracture strength (p > 0.05). The use of TotalFill-BC sealer showed similar vertical root fracture resistance as AH plus sealer in root canal treated teeth. Use of total fill-BC and AH Plus sealer in root canal treatment showed vertical root fracture resistance comparable to untreated natural teeth (positive controls).

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Evaluation of dentinal micro-cracks caused by the Protaper Universal, Protaper Next and Reciproc rotary file systems used in root canal preparation

International Dental Research ◽

10.5577/intdentres.2018.vol8.no3.3 ◽

2018 ◽

Vol 8 (3) ◽

pp. 111-116

Author(s):

Meltem Deveci Taç ◽

Sadullah Kaya ◽

Seda Falakaloğlu

Keyword(s):

Root Canal ◽

Crack Formation ◽

File System ◽

File Systems ◽

Root Canal Preparation ◽

Root Fracture ◽

Vertical Root Fracture ◽

Anterior Teeth ◽

Micro Cracks ◽

Significant Difference

Objective: In this study, we compared the occurrence of dentinal micro-cracks after use of the ProTaper Universal (Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Next (Dentsply Maillefer), and Reciproc (VDW, Munich, Germany) nickel–titanium rotary file systems in root canal preparation. Method: One hundred mandibular anterior teeth were divided into five groups of 20 specimens each. Group 1 served as a control, with no intervention. In group 2, preparation was performed using the step-back technique and K files. In groups 3–5, root canal preparation was performed using the ProTaper Universal, ProTaper Next, and Reciproc file systems, respectively. Following preparation, specimens were sectioned at 3, 6, and 9 mm using a Minitom precision cut-off machine. The sections were evaluated under a stereomicroscope. The following scoring system was used to rate specimens: 1, no micro-crack; 2, incomplete micro-crack; and 3, vertical root fracture. The results were statistically assessed (p ≤ 0.05). Results: No micro-crack formation was observed in groups 1 and 2. The highest rate of micro-crack formation was observed in specimens prepared with the ProTaper Universal file system (20%), followed by those prepared with the Reciproc (11.7%) and ProTaper Next (6.7%) file systems. However, no significant difference was detected among groups (p > 0.05). In the groups ProTaper Universal and Reciproc files were used, 1 vertical root fracture was found in 9 mm sections for each. Conclusion: Considering the limitations of in vitro studies, we can conclude that all rotary file systems used in this study led to dentinal micro-crack formation in roots. The ProTaper Universal file system caused more dentinal micro-cracking than did the ProTaper Next and Reciproc file systems.

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