scholarly journals The advantage using Ni - Ti rotary instruments as the smoothness of one-third apical root canal wall

2014 ◽  
Vol 26 (3) ◽  
Author(s):  
Badi Soerachman ◽  
Endang Sukartini ◽  
Dudi Aripin
Keyword(s):  
Experimental Research ◽  
Root Canal ◽  
T Test ◽  
Nickel Titanium ◽  
Canal Wall ◽  
In Vitro Method ◽  
Roughness Surface ◽  
Rotary Instruments ◽  
Quasi Experimental

Canal wall preparation achieved by smoothness. Objective of this study to determine smoothness differences of nickel-titanium manual instruments compared with nickel-titanium rotary instruments in apical third region canal wall. This study was a quasi-experimental research conducted by in vitro method on 30 single rooted upper permanent incisive that have been extracted. They were randomly divided into two groups (n=15) and each group root canal teeth were cleaned and shaped with manual rotary nickel-titanium instruments. Roughness analyzed used with Mitutoyo roughness surface instruments. Every sample analyzed in third region canal wall. Data have been analyzed with a t-test. The result of the study showed that different smoothness for every sample after preparation by manual and rotary. In conclusion, from this study showed those instrumentations with rotary nickel titanium will give the best smoothness than manual nickel titanium instruments, so the result gets significantly.

scholarly journals The shaping advantage of M-wire compared with conventional nickel-titanium rotary instruments in heavy curvature canal

2020 ◽  
Author(s):  
Mika Tanaka-Sato ◽  
Noriko Mutoh ◽  
Kaori Shimojima ◽  
Nobuyuki Tani-Ishii
Keyword(s):  
Root Canal ◽  
Nickel Titanium ◽  
Canal Wall ◽  
Root Canals ◽  
Rotary Instruments ◽  
The Mean ◽  
Canal Shaping ◽  
Shaping Ability

Abstract Background The purpose of this study was to evaluate the shaping advantage of M-wire NiTi ProTaper NEXT (PTN) compared with a conventional NiTi ProTaper Universal (PTU) file in heavy curvature canal. The shaping ability was measured by the amount of canal cutting and transportation between the PTN and conventional PTU. Methods Root canal shaping by the PTN and conventional PTU was classified into two experimental groups according to the final tip size, ISO #25 or ISO #40. Eighty-four J-shaped root canals (10°, 20°, 30° apical curvature) in resin block were used. Results After adjusting for the level and canal wall side, the mean transportation did not significantly decrease between the PTN and PTU with ISO #25. Significantly less deviation occurred with the PTN and PTU between 10° and 30° using ISO #40. Conclusions The M-Wire NiTi PTN improves file flexibility and enables accurate canal shaping for heavy curvature canals.

scholarly journals Deformation of Nickel-Titanium (NiTi) rotary instruments in cyclic loading – in vitro study

2018 ◽  
Vol 65 (2) ◽  
pp. 61-70
Author(s):  
Isidora Nešković ◽  
Igor Stojanac ◽  
Sanja Vujkov ◽  
Jovan Laban Terzija ◽  
Aleksandra Maletin
Keyword(s):  
Root Canal ◽  
Statistical Significance ◽  
Nickel Titanium ◽  
Torque Control ◽  
Matched Pair ◽  
Human Teeth ◽  
Rotary Instruments ◽  
Significant Difference ◽  
Niti Rotary Instruments

Summary Introduction Separation of instruments in the root canal is one of the challenges in endodontic treatment. More specifically, nickel-titanium (NiTi) rotary instruments usually separate without previous deformation. The aim of this pilot study was to assess the effect of torsional stress on endodontic NiTi rotary instruments separation in simulated clinical conditions. Materials and methods Research was conducted on a sample of 20 human teeth in laboratory conditions. Experimental procedure consisted of determining canal curvatures for each root on digital radiographs and root canal treatment using endodontic NiTi rotary instruments. Out of 20 teeth (60 canals), two groups were formed with similar root canal curvatures (10 pairs of teeth) and instrumented using NiTi rotary instrument with or without torque control. Results Wilcoxon matched pair test showed no statistically significant difference in average number of instruments use with or without torque control (p>0.05). Conclusion Even though there is no statistical significance in instrument separation when instruments were used with or without torque, there is tendency to experience sudden fracture of instruments after work without torsional control even after only few uses in clinical work.

UTILIZING GRAPHIC ORGANIZER STRATEGY IN TEACHING WRITING ON NARRATIVE PARAGRAPH

2020 ◽  
Vol 11 (2) ◽  
pp. 189-204
Author(s):  
Nurjannah Nurjannah ◽  
Taufiq Hidayah ◽  
Muhammad Nazar
Keyword(s):  
Experimental Research ◽  
English Learners ◽  
Teaching And Learning ◽  
Research Result ◽  
T Test ◽  
Teaching Writing ◽  
Graphic Organizer ◽  
Control Group ◽  
Post Test ◽  
Quasi Experimental

This research is entitled “Using graphic organizer strategy in teaching writing on narrative paragraph (experimental research). Writing is a very important subject that should be learned by English learners. The students should be able to express their ideas and opinion either in the form of a sentence or paragraph. However, the researcher found that many students at the Second Grade Students of SMP Negeri 1 Tanah Luas could not express their ideas and develop into the paragraph. Hence, the appropriate strategy of teaching and learning is very important to help students master writing skills. This research aims to know the effect of achievement between the students who are taught writing by using graphic organizers from those taught writing in the narrative by using traditional methods. This research was experimental research and used a quasi-experimental design. The samples chosen in this research were the whole students of class VIII2 and VIII4 of SMPN 1 Tanah Luas. Class VIII2 consisted of 25 students was chosen as experimental group and class VIII4 consisted of 24 students was chosen as control group. This research was conducted in three phrases; there were pre-test, treatments and post-test. The data collection technique used in this research was test. The tests were pre-test and post-test. The researcher gave pre-test before giving treatment and post-test after giving treatment. The treatment was conducted in three meetings. The data was analyzed by using t-test formula. The research result and the hypothesis authentication found by using t-test formula in significant level 5% or α = 0.05 were obtained that ttest > ttable. The ttest found in this research was 3.91. Meanwhile, ttable was gotten from the list of distribution value with degree of freedom = 47, because the data not in the table, the researcher used interpolation approach and obtained = 1.67. So >  = 3.91 > 1.67. It meant that Ha was accepted and Ho was rejected. So, graphic organizer strategy significantly affects the students’ ability in mastering writing.   Kata Kunci: graphic organizer strategy, teaching and learning, writing narrative paragraph

scholarly journals Efektivitas Media Pembelajaran Anatomi Kadaver Dibandingkan Video Terhadap Pemahaman Neuroanatomi pada Mahasiswa Kedokteran

2021 ◽  
Vol 1 (1) ◽  
pp. 26
Author(s):  
Prasetya Utami ◽  
Yunia Hastami ◽  
Siti Munawaroh ◽  
Nanang Wiyono
Keyword(s):  
Experimental Research ◽  
T Test ◽  
Control Group ◽  
Control Group Design ◽  
Paired Sample ◽  
Group Design ◽  
Quasi Experimental

<p><strong>Pendahuluan : </strong>Neuroanatomi merupakan ilmu penting bagi kedokteran, namun<strong> </strong>masih ditemukan mahasiswa kedokteran yang merasa kesulitan memahami pembelajaran neuroanatomi. Salah satu faktor yang berperan penting adalah media pembelajaran anatomi. Kadaver merupakan media pembelajaran anatomi tradisional yang masih digunakan hingga saat ini dengan berbagai kekurangan dan kelebihan  yang dimilikinya. Sedangkan media video merupakan media pembelajaran anatomi yang diniliai lebih praktis dan sesuai dengan perkembangan zaman, sehingga di nilai bisa sebagai media alternatif selain kadaver. Penelitian ini bertujuan untuk mengetahui efektivitas media pembelajaran anatomi menggunakan kadaver dibandingkan video terhadap pemahaman neuroanatomi mahasiswa kedokteran.</p><p><strong>Metode : </strong>Jenis penelitian ini ialah Quasi Experimental Research dengan Pretest Posttest Control Group Design. Populasi dalam penelitian ini adalah mahasiswa program studi kedokteran UNS tahun 2019. Sampel dalam penelitian ini sebanyak 42 oranag. Data kemudian diolah dengan uji Paired Sample T-Test dan Independent T-test menggunakan program SPSS 22.</p><p><strong>Hasil : </strong>Hasil Paired Sample T-Test kelompok kadaver dan video menunjukan nilai Sig. (2-tailed) &lt; 0,05 yaitu 0,000. Sehingga media kadaver maupun video dinilai efektif terhadap pemahaman neuroanatomi mahasiswa. Hasil uji Independent T-test untuk mengetahui perbedaan antara efektivitas media pembelajaran anatomi menggunakan kadaver dibandingkan video terhadap pemahaman neuroanatomi mahasiswa kedokteran memperlihatkan nilai p = 0,730, sehingga menunjukkan hasil yang tidak signifikan karena p 0,05 pada taraf signifikan 5%.</p><p><strong>Kes</strong><strong>impulan : </strong>Media pembelajaran anatomi kadaver maupun video terbukti efektif meningkatkan pemahaman neuroanatomi pada mahasiswa kedokteran. Selain itu, media pembelajaran anatomi kadaver dibandingkan video memiliki efektivitas yang sama terhadap pemahaman neuroanatomi pada mahasiswa kedokteran</p><p><strong>Kata kunci : Kadaver; Video Anatomi; Pemahaman Neuroanatomi</strong></p>

scholarly journals Factors influencing incidents of complications while using nickel-titanium rotary instruments for root canal treatment

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Ahmad A. Madarati
Keyword(s):  
Root Canal ◽  
Nickel Titanium ◽  
Influential Factor ◽  
Common Complication ◽  
Pilot Studies ◽  
Significance Level ◽  
Rotary Instruments ◽  
Chi Squared ◽  
Final Questionnaire ◽  
General Dentists

Abstract Background To investigate the complications associated with the use of nickel titanium rotary instruments (NiTi-RIs) for root canal treatments (RCTs), in Saudi Arabia dental practice, and to explore the influencing factors. Methods After obtaining an ethical approval, two pilot studies were conducted to formulate the final questionnaire. The sample size was measured taking into consideration 60% expected response rates and confidence level of 99.9%. The questionnaire was emailed to 600 general dentists (GDs) randomly selected from the dental register and all of the endodontists (175). The email’s introduction clarified objectives of the study and guaranteed that all of the collected information would remain confidential. A reminder was sent after 10 weeks. The data were collected and analyzed using the chi-squared test at a 0.05 significance level. Results With a 51% overall response rate, 71.9% off the respondents used NiTi-RIs. The majority (83.1%) experienced complications while using NiTi-RIs; with the instruments’ fracture being significantly the most common complication (52.7%) (p < 0.001). The majority (87.7%) experienced NiTi-RIs’ fractureat least once; with more endodontists (94.3%) than GDs (83.3%) (p < 0.001). The greater the number of weekly performed RCTs and participants’ experiences, the more NiTi-RIs fractures and the greater the number of fracture incidents (p < 0.001). While 60% of those who performed 1–3 RCTs per week experienced NiTi-RIs fractures, 100% of those who performed more than 12 RCTs per week did so. The highest percentage of those who experienced more than 10 fractured NiTi-RIs (60%) was within the group who performed more than 12 RCTs per week. Although fracture incidents decreased with a smaller number of reuses, there was no significant correlation between the number of fractured instruments and NiTi-RIs discard strategy (p ≥ 0.05). Conclusion Fracture incidence was the most common complication while using NiTi-RIs, regardless of the clinicians’ experiences and skills. While the single use may reduce NiTi-RIs fractures, to some extent, the greater number of RCTs performed per week was the most influential factor.

Effectiveness of different final irrigation solutions on quantification of calcium ions from the root canal wall: An in vitro study

2018 ◽  
Vol 6 (2) ◽  
pp. 28
Author(s):  
Anju M Abraham ◽  
Bidya Yendrembam ◽  
Shilpa Kumari ◽  
Anika Mittal ◽  
Aditi Dhaundiyal
Keyword(s):  
Calcium Ions ◽  
Root Canal ◽  
In Vitro Study ◽  
Vitro Study ◽  
Canal Wall
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