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RISS 인기검색어
- 검색키워드
- 저자 : Sattyam Wankhade (검색결과 3 건)
- 무료
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Sattyam Vikram Wankhade,Jyoti Lokade,Divya Devidas Naik,Nitesh Kumar Srivastava 대한예방치과학회 2017 International Journal of Clinical Preventive Denti Vol.13 No.1
Objective: Evaluation and comparison of the transverse strengths of Type IV and Type V gypsums, Resin modified type IV and type V gypsums, Synthetic gypsum and Epoxy resin die material, on setting and after a period of twenty four hours. Methods: Each die material was used to fabricate ten dies (39×6×6 mm), using polyvinyl siloxane impressions in standardized custom trays, that were tested for transverse strength in a Universal Testing machine, at setting. Another set of sixty dies were tested in a similar manner, 24 hours after setting. The one way ANOVA and Tukey multiple comparison tests were applied for statistical analysis. Results: The transverse strength values for epoxy resin were superior to the other materials being tested, at both time intervals. Type IV gypsum had higher transverse strength values than the other gypsum based materials at setting while at 24 hours, the resin modified materials ranked higher. A significant increase in the transverse strength (89%-146%) was noted when the gypsum based products were tested at twenty-four hours. Conclusion: When using gypsum based materials, one must wait at least 24 hours before retrieving the casts from impressions and proceeding with subsequent laboratory procedures.
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Sattyam Wankhade,Bhagawandas Motwant,Ram Thombare 대한임상예방치과학회 2011 International Journal of Clinical Preventive Denti Vol.7 No.4
Objective: To evaluate and compare shear bond strength of cross-linked acrylic denture teeth with two high impact & one conventional denture base resin. Methods: Seventy.five maxillary central incisors acrylic resin teeth (Aesthetic, Heraeus Kulzar, Germany) of same mold (17TO) were chosen and processed in heat cure resin. Group A- Twenty five samples of cross-linked acrylic teeth were used for high impact Trevlon. HI Group B- Twenty five samples of cross-linked acrylic teeth were used for conventional DPI. Group C- Twenty five samples of cross-linked acrylic teeth were processed with high impact Meliodent. Each Tooth arranged onto the acrylic block of respective group were placed onto a fixture for shear bond strength at 130 degree. Instron testing machine was used for testing. Results: The One-way ANOVA revealed significant differences among Group A, Group B and Group C for all specimens (p<0.05). In this comparison between Group A and Group B the calculated ‘t’ value was 37.96 and tabulated ‘t’ value was 2.00. Hence the calculated ‘t’ value was higher than the tabulated ‘t’ value at 0.05% level of significance. Conclusion: Shear bond strength of cross-linked acrylic resin teeth with two high impact denture base acrylic resin was significantly greater as compared to that with conventional denture base resin. However majority of specimens had bond failure which was cohesive in nature between cross-linked acrylic teeth specimen processed with high impact acrylic resin denture base and maximum adhesive type of bond failure between cross-linked acrylic teeth specimen processed with conventional denture base resin.
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Jyoti Lokade,Sattyam Wankhade,Shelly Roy,Monaj Chandak 대한예방치과학회 2012 International Journal of Clinical Preventive Denti Vol.8 No.3
Objective: This in vitro study compare and evaluate Fracture Resistance of roots filled with gutta percha-AH Plus sealer and Resilon Epiphany with cold lateral and warm vertical compaction techniques. Interface of dentin, sealer and core material of each group were also evaluated under scanning electron microscope. Methods: 125 single-canal extracted mandibular first premolars were divided into five groups: lateral and vertical compaction with gutta-percha/AH Plus sealer, lateral and vertical compaction with Resilon Epiphany, and a control group with no filling material. The samples were stored in 100 percent humidity for two weeks, mounted in acrylic resin and loaded to failure under Instron testing machine. One sample from each group was longitudinally sectioned, placed in dessicator, sputter coated with gold palladium and evaluated by using scanning electron microscope to check the interface of dentin, sealer and core filling material. Results: Resilon epiphany groups displayed higher mean fracture loads and the gutta-percha groups lower mean fracture load values than the control unfilled group. There is no gap seen between Resilon Epiphany & dentin in lower manification (500×) & gap seen between gutta percha, sealer & dentin interface. There was one microgap seen at 2,000× power SEM between the Resilon filling & dentin at middle 1/3rd. There was no gap at 2,000× power SEM between Resilon, Epiphany and dentin at coronal and apical third. Conclusion: Filling the root canals with Resilon/Epiphany increases the in vitro resistance to fracture of roots of extracted teeth with single canal.
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