Endodonti Bölümü Makale Koleksiyonu
https://hdl.handle.net/11655/162
2024-03-29T10:12:04Z
2024-03-29T10:12:04Z
Influence Of Cavity Design On Calcium Hydroxide Removal From Root Canal Irregularities
Küçükkaya Eren, S.
Uzunoĝlu özyürek, E.
https://hdl.handle.net/11655/24320
2021-06-03T08:00:41Z
2019-01-01T00:00:00Z
Influence Of Cavity Design On Calcium Hydroxide Removal From Root Canal Irregularities
Küçükkaya Eren, S.; Uzunoĝlu özyürek, E.
Objectives: Conservative endodontic cavity (CEC) design has recently developed to maintain the stability of tooth and provided an alternative to traditional endodontic cavity (TEC) design. The purpose of this study was to assess the influence of cavity design on calcium hydroxide (Ca(OH)2) removal from artificial grooves in the coronal and apical parts of root canals. Materials and Methods: Fourty extracted human mandibular premolars with single canals were randomly assigned to CEC or TEC groups (n=20). Following cavity preparation, the root canals were instrumented with ProTaper Universal rotary system up to F3 file and then, each tooth was sectioned longitudinally. Two standardized grooves were prepared in the coronal and apical parts of 1 root half. Ca(OH)2 was placed into the grooves and the root halves reassembled. After 1 week, each root canal was enlarged with a #40 H-file. Irrigation was performed with the sonic activation of 5 mL 2.5% sodium hypochlorite and 5 mL 17% ethylenediaminetetraacetic acid solutions using the medium size tip (25/04) of EndoActivator System at medium speed for 30 seconds between each 2.5 mL irrigant. The remaining Ca(OH)2 in the grooves was evaluated using a stereomicroscope with x25 magnification and the images were scored using a 4-scoring scale by 2 examiners. Data were analyzed using the Mann-Whitney U and Wilcoxon tests. Results: Ca(OH)2 remnants were found in both groups. There was no significant difference between the CEC and TEC groups in terms of Ca(OH)2 removal efficacy (p>0.05). The grooves in the coronal and apical parts of the roots presented similar amount of Ca(OH)2 remnants in both groups (p>0.05). Conclusions: Based on the present findings, the cavity design had no effect on the removal of Ca(OH)2 from root canal irregularities. © 2019 Cumhuriyet University Faculty of Dentistry.
2019-01-01T00:00:00Z
Surface And Vertical Dimensional Changes Of Mineral Trioxide Aggregate And Biodentine In Different Environmental Conditions
Aksel, Hacer
Kucukkaya Eren, Selen
Askerbeyli Ors, Sevinc
Karaismailoglu, Eda
https://hdl.handle.net/11655/24321
2021-06-03T08:00:41Z
2019-01-01T00:00:00Z
Surface And Vertical Dimensional Changes Of Mineral Trioxide Aggregate And Biodentine In Different Environmental Conditions
Aksel, Hacer; Kucukkaya Eren, Selen; Askerbeyli Ors, Sevinc; Karaismailoglu, Eda
Surface changes in biological environments are critical for the evaluation of physical and biological activity of biomaterials. Objective: This study investigated surface alterations of calcium silicate-based cements after exposure to different environments. Material and Methods: Forty-eight cylindrical cavities were prepared on root surfaces. The cavities were filled using ProRoot MTA or Biodentine and assigned to four subgroups (n=6): dry, wet, acidic, and blood. Surface topographies were evaluated using an optical profilometer for 28 days, and the roughness of the material surfaces was quantified. Vertical dimensional change was measured by determining the height difference between the material surface and the flat tooth surface. Data were compared with a two-way repeated measures ANOVA and Bonferroni tests. Results: In dry condition, the surface roughness of MTA or Biodentine was constant up to 3 days (p>0.05) but decreased after 28 days (p<0.05). In dry condition, ProRoot MTA presented constant surface level through time, while Biodentine showed decreased surface level after 28 days. In wet condition, the roughness and the surface levels of both materials increased after 1 day (p<0.05). Neither the surface roughness nor the levels of the materials showed significant changes in acidic conditions (p>0.05). Both materials showed the highest roughness in blood conditions on the lst day (p<0.05), while the surface roughness in blood decreased dramatically after 28 days. The roughness of Biodentine was higher in wet conditions up to 3 days compared with ProRoot MTA (p<0.05). Likewise, in blood condition, Biodentine showed higher roughness on the 28th day than ProRoot MTA (p<0.05). Conclusions: Dry, wet, and blood conditions had a time-dependent effect on the surface roughness and vertical dimensional changes of the materials. However, acidic conditions did not affect the roughness and the surface level of the materials.
2019-01-01T00:00:00Z
Evaluation Of Fracture Resistance Of Roots-Filled With Various Root Canal Sealers At Different Time Periods
Uzunoglu Ozyurek, Emel
Aktemur Turker, Sevinc
https://hdl.handle.net/11655/24319
2021-06-03T08:00:41Z
2019-01-01T00:00:00Z
Evaluation Of Fracture Resistance Of Roots-Filled With Various Root Canal Sealers At Different Time Periods
Uzunoglu Ozyurek, Emel; Aktemur Turker, Sevinc
Purpose: The reinforcement effect of 3 various root canal sealers (AH 26, MTA Plus sealer and BioRoot RCS) and gutta-percha at different time periods (1 week and 1 month) were evaluated in the present study. Materials and methods: Single-rooted, single-canalled, cracks-free 80 mandibular premolars were decoronated to a length of 13mm. Group PC (positive control, n=10): samples were left unprepared and unfilled. Seventy samples were prepared by using the ProTaper Rotary System up to F4. Group NC (negative control, n=10): samples were left unfilled. Remaining 60 samples were assigned into 3 groups; Group 1: AH 26 + F4 gutta-percha (GP); Group 2: MTA Plus sealer + F4 GP and Group 3: BioRoot RCS + F4 GP. Filled samples were divided into subgroups according to storage time: Samples in Groups 1A, 2A, and 3A were stored for 1 week; while Groups 1B, 2B and 3B were stored for 1 month at 100% humidity to allow the complete setting of the sealers (n=10, for each). A universal testing machine at a crosshead speed of 1.0 mm/min was used for fracture testing. For each specimen, the force at the time of fracture was recorded and the data were analyzed statistically. Results: The highest fracture resistance values were obtained in Group PC, while the lowest values were obtained in Group NC. Groups PC and NC were statistically different from each other and from other groups, regardless of time (p<0.05). Fracture resistance values of Group AH 26/GP were statistically different from MTA Plus sealer/GP (p<0.05) and were statistically similar with BioRoot RCS/GP , irrespective of time. Within group comparisons revealed that there were no statistically differences between samples filled with same sealer at different time periods. Conclusion: Root canal preparation caused decreased fracture resistance. All sealers increased the force values needed to fracture the filled samples compared to unfilled ones. Time factor had no effect on the fracture resistance values.
2019-01-01T00:00:00Z
Comparison Of Apically Extruded Debris Associated With Different Nickel-Titanium Systems
Keleş, A.
Ozyurek, E.U.
Uysal, S.
Tuncel, B.
Uyanik, M.O.
Nagas, E.
https://hdl.handle.net/11655/24317
2021-06-03T08:00:40Z
2019-01-01T00:00:00Z
Comparison Of Apically Extruded Debris Associated With Different Nickel-Titanium Systems
Keleş, A.; Ozyurek, E.U.; Uysal, S.; Tuncel, B.; Uyanik, M.O.; Nagas, E.
Objectives: The aim of this study is to evaluate the influence of different instrument systems on the amount of extruded debris. Materials and Methods: A total of 30 extracted mandibular molars with two separate canals and apical foramina in the mesial roots were selected. The root canals (n=10) were randomly assigned to the six groups of file systems as follows: ProTaper Next (PTN), WaveOne (WO), WaveOne Gold (WOG), One Shape (OS), Reciproc (R) and Reciproc Blue (RB). The extruded debris during the instrumentation was collected into Eppendorf tubes, which were weighed and then stored in an incubator at 70°C over a period of five days to evaporate the irrigant. After the incubation process, the Eppendorf tubes were weighed again. The difference between these two measurements, the first one before and the second one after the incubation process, was calculated. Data were statistically analyzed, and the significance level was set at p<0.05. Results: R produced less debris compared to WO. R and PTN files produced significantly less debris compared to the OS files (p<0.05). Extruded debris in RB and WO groups were not significantly different, while RB produced less debris than WOG and OS (p<0.05). Conclusions: All instrumentation systems allowed for the apical extrusion of the debris. © 2019 Cumhuriyet Dental Journal.
2019-01-01T00:00:00Z