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Hegde, Vibha
- Sealing Ability of Novel Hydrophilic Single-Cone Obturation Systems in an Oval Canal:An In-Vitro Glucose Leakage Study
Abstract Views :210 |
PDF Views:91
Authors
Affiliations
1 YMT Dental College and Hospital, Navi Mumbai, Mahrashtra, IN
1 YMT Dental College and Hospital, Navi Mumbai, Mahrashtra, IN
Source
Dental Journal of Advance Studies, Vol 2, No 3 (2014), Pagination: 125-129Abstract
Objective: To compare the sealing ability of three single-cone obturation systems using a glucose leakage model. Materials and Methods: A total of 90 freshly extracted human mandibular incisors with oval canals were selected and their crowns were cut. The ischolar_main canal of each sample was instrumented using a rotary crown down technique and then divided into four experimental (n=20 each) and two control groups (n=5 each). Samples in the experimental groups were filled as follows: Group 1, cold lateral condensation using Gutta-percha/AH Plus; Group 2, single-cone C-Points/Smart-Paste Bio Sealer; Group 3, single cone Bio-Ceramic Impregnated Gutta-Percha/Endo-Sequence Bio-Ceramic Sealer; Group 4, single-cone Resilon/RealSeal SE. After 7 days, the sealing ability of ischolar_main canal fillings was tested at different time intervals using glucose leakage model. Glucose leakage values were measured using a spectrophotometer and statistically analyzed. Results: The four experimental groups presented significantly different glucose leakage values at all test periods (P<0.05). At the end of the observation period, the cumulative glucose leakage values of Groups 2 and 3 were significantly lower than those of Groups 1 and 4 (P<0.05). Conclusion: C-Points/ Smart-Paste Bio and Bio-Ceramic Impregnated Gutta-Percha/Endo-Sequence Bio-Ceramic Sealer combinations provided the superior sealing ability over the lateral condensation technique.Keywords
Bio Ceramic Sealer, Glucose Leakage Model, Smart Paste Bio.Full Text
- Comparison of Surface Characteristics of Apical Third of Rotary NiTi Files Manufactured from Different Phases of NiTi before and after Use : an SEM Analysis
Abstract Views :258 |
PDF Views:87
Authors
Dhwani Bakhai
1,
Vibha Hegde
2
Affiliations
1 YMT Dental College and Hospital, Mumbai, IN
2 Department of Conservative Dentistry & Endodontics, YMT Dental College & Hospital, Mumbai, IN
1 YMT Dental College and Hospital, Mumbai, IN
2 Department of Conservative Dentistry & Endodontics, YMT Dental College & Hospital, Mumbai, IN
Source
Dental Journal of Advance Studies, Vol 4, No 1 (2016), Pagination: 18-22Abstract
Clinically, there is a real potential for rotary NiTi instruments to separate in the canal; hence increasing the resistance to fracture has been a focus in the designing of new NiTi rotary systems. NiTi alloys go through various transitional phases and these have been utilized by manufacturers in different file systems. Aim : To evaluate and compare the surface changes of rotary nickel-titanium instruments manufactured from the Austenite phase, M-wire technology and R-phase before and after multiple uses. Materials and Methodology : 60 freshly extracted human mandibular premolars with a single, straight canal were selected. They were divided into 3 groups of 20 teeth each. Cleaning and Shaping was carried out using the crown down technique. All instruments were evaluated for defects under Scanning Electron Microscope (SEM) before and after multiple uses and scored for the defects. Results were statistically analyzed using KruskalWallis and Mann Whitney U test. Results : The p-value was <0.0001, indicating a statistically significant difference between the three groups in terms of resistance to surface defects. Conclusion : R-phase technology had superior resistance to surface defects, followed by M-wire and the austenitic phase.Keywords
NiTi Instruments, Surface Defects, Transitional Phases.Full Text
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