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The effects of different nickel-titanium instruments on dentinal microcrack formations during root canal preparation.

Ustun Y, Aslan T, Sagsen B, Kesim B - Eur J Dent (2015 Jan-Mar)

Bottom Line: Group 5: Preparation with ProTaper Next instruments up to X2 instrument.There were no significant differences among the groups (P > 0.05).In conclusion, except the hand file and control group, all experimental groups showed microcrack formations.

View Article: PubMed Central - PubMed

Affiliation: Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkiye.

ABSTRACT

Objective: The aim of the present study was to investigate the incidence of dentinal microcracks caused by different preparation techniques.

Materials and methods: 120 extracted human mandibular incisor teeth were divided into five experimental groups and one control group (n = 20): Group 1: Hand preparation with balanced force technique up to #25 K-file. Group 2: Preparation with only ProTaper F2 instrument in a reciprocating movement. Group 3: Preparation with Reciproc R25 instrument in a reciprocating movement. Group 4: Preparation with ProTaper instruments up to F2 instrument. Group 5: Preparation with ProTaper Next instruments up to X2 instrument. No procedure was applied to control group. The roots were sectioned horizontally at 3, 6 and 9 mm from the apex and examined. Absence or presence of dentinal microcracks was noted.

Results: The Chi-square test was performed to compare the appearance of cracked roots between all groups. There were no significant differences among the groups (P > 0.05).

Conclusions: In conclusion, except the hand file and control group, all experimental groups showed microcrack formations.

No MeSH data available.


Related in: MedlinePlus

Representative microscopic images from each experimental group. Arrows point at dentinal defects. (a) No defect (devoid of any lines or cracks) (b) incomplete defects (e.g., a craze line, a line extending from the outer surface into the dentin but that did not reach the canal lumen; or a partial crack, a line extending from the canal wall into the dentin without reaching the outer surface). (c) Fracture (a line extending from the root canal space to the outer surface of the root)
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Figure 1: Representative microscopic images from each experimental group. Arrows point at dentinal defects. (a) No defect (devoid of any lines or cracks) (b) incomplete defects (e.g., a craze line, a line extending from the outer surface into the dentin but that did not reach the canal lumen; or a partial crack, a line extending from the canal wall into the dentin without reaching the outer surface). (c) Fracture (a line extending from the root canal space to the outer surface of the root)

Mentions: Fracture was a line extending from the root canal space to the outer surface of the root[3] [Figure1].


The effects of different nickel-titanium instruments on dentinal microcrack formations during root canal preparation.

Ustun Y, Aslan T, Sagsen B, Kesim B - Eur J Dent (2015 Jan-Mar)

Representative microscopic images from each experimental group. Arrows point at dentinal defects. (a) No defect (devoid of any lines or cracks) (b) incomplete defects (e.g., a craze line, a line extending from the outer surface into the dentin but that did not reach the canal lumen; or a partial crack, a line extending from the canal wall into the dentin without reaching the outer surface). (c) Fracture (a line extending from the root canal space to the outer surface of the root)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4319298&req=5

Figure 1: Representative microscopic images from each experimental group. Arrows point at dentinal defects. (a) No defect (devoid of any lines or cracks) (b) incomplete defects (e.g., a craze line, a line extending from the outer surface into the dentin but that did not reach the canal lumen; or a partial crack, a line extending from the canal wall into the dentin without reaching the outer surface). (c) Fracture (a line extending from the root canal space to the outer surface of the root)
Mentions: Fracture was a line extending from the root canal space to the outer surface of the root[3] [Figure1].

Bottom Line: Group 5: Preparation with ProTaper Next instruments up to X2 instrument.There were no significant differences among the groups (P > 0.05).In conclusion, except the hand file and control group, all experimental groups showed microcrack formations.

View Article: PubMed Central - PubMed

Affiliation: Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkiye.

ABSTRACT

Objective: The aim of the present study was to investigate the incidence of dentinal microcracks caused by different preparation techniques.

Materials and methods: 120 extracted human mandibular incisor teeth were divided into five experimental groups and one control group (n = 20): Group 1: Hand preparation with balanced force technique up to #25 K-file. Group 2: Preparation with only ProTaper F2 instrument in a reciprocating movement. Group 3: Preparation with Reciproc R25 instrument in a reciprocating movement. Group 4: Preparation with ProTaper instruments up to F2 instrument. Group 5: Preparation with ProTaper Next instruments up to X2 instrument. No procedure was applied to control group. The roots were sectioned horizontally at 3, 6 and 9 mm from the apex and examined. Absence or presence of dentinal microcracks was noted.

Results: The Chi-square test was performed to compare the appearance of cracked roots between all groups. There were no significant differences among the groups (P > 0.05).

Conclusions: In conclusion, except the hand file and control group, all experimental groups showed microcrack formations.

No MeSH data available.


Related in: MedlinePlus