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| تعداد مقالات | 9,123 |
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Comparison of Dentinal Defects Formation in Straight, Moderate and Severely Curved Canals by Three Distinctive Nickel Titanium Instruments: an in vitro Study | ||
| Journal of Dentistry | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 27 آذر 1401 اصل مقاله (335.32 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.30476/dentjods.2022.94475.1787 | ||
| نویسندگان | ||
Azin Alasvand Javadi   1؛ Mansour Jafarzadeh 2؛ Mohammad Yazdizadeh 2؛ Neda Askari Hasanvand1؛ Shadi Nikoonejad1؛ Ali Amiri1
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| 1Dentist, Ahvaz, Iran. | ||
| 2Dept. of Endodontics, Faculty of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Dey St, Golestan Blvd, Ahvaz, Iran. | ||
| چکیده | ||
| Statement of the Problem: it is stated that engine-driven instruments might cause dentinal defects during root canal preparation. These defects might spread and progress into greater fractures or vertical root fracture. Purpose: This study aimed to compare the incidence of dentinal defects that might arise all through preparation of root canals, using One Shape, RaCe, and WaveOne systems in canals with a curvature (0-20°) and (20-40°). Materials and Method: In this in vitro study, 150 mandibular first molars were enrolled. Based on the degree of curvature in the mesial roots, the samples were divided into two groups (n=75) of straight and moderately curved canals (0-20º), and severely curved canals (20-40°). Then each group was randomly divided into four sub-groups. In subgroups 1 to 3 from each group, canals were prepared using WaveOne, One Shape, and RaCe. Then all roots were sectioned at 3, 6 and 9-mm distances from the apex. The slices were evaluated using stereomicroscope at 12× magnification. The data were analyzed using the Chi-square and Fisher’s exact tests and the level of significance was set at 0.05. Results: Fracture and other defects were not found in the control groups. In canals with curvature (0-20°), WaveOne caused the maximum dentinal defects and RaCe produced the least. Moreover, in canals with curvature (20-40°), One Shape caused the maximum dentinal defects while WaveOne and RaCe caused equal dentinal defects approximately. Conclusion: There was a statistically significant relationship between the performance of RaCe and One Shape in canals with curvature (0-20º) and (20-40º), (p Value< 0.05) while no statistically significant difference was observed in connection to the performance of WaveOne (p> 0.05). | ||
| کلیدواژه‌ها | ||
| Dentinal defects؛ Microcracks؛ Nickel-titanium instruments؛ Reciprocation؛ Root canal preparations؛ Root fracture | ||
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آمار تعداد مشاهده مقاله: 65 تعداد دریافت فایل اصل مقاله: 56 |
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