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1391/10/12، جلد ۱۰، شماره ۱، صفحات -
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Microleakage of Different Post Systems and a Custom Adapted Fiber Post |
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| چکیده انگلیسی مقاله |
Objective: The effects of closely adapting a prefabricated fiber to the post space remain unknown. The purpose of this study was to quantify the microleakages of a custom adapted fiber-reinforced post, a prefabricated quartz fiber post and a cast post using nondestructive methods. Materials and Methods: Sixty-five extracted human premolars were endodontically treated and randomly divided into three groups (n=15), which were restored using a cast post-and-core, a custom adapted fiber post (Refropost) with a microhybrid microfiller resin composite (Gradia), or a prefabricated quartz fiber post (DT light post) and two groups of control ( n=10). All groups were cemented using a dual polymerizing resin cement (Panavia F 2.0 ). A composite core (Z100) was used for the fiber posts. The microleakage was calculated for the experimental and control groups before and after thermal cycling and cycling loading using a radiotracer solution (thallium 201 chloride) and a gamma counter device. Data were subjected to statistical analysis of ANOVA and Tukey HSD at significant level of P< 0.05. Results: Significantly lower microleakage values were found for the cast post-and-core (mean value =16.04 ×10 4 ) and custom adapted fiber post groups (mean value=14.36×10 4) . Thermal cycling and cyclic loading had no significant effect on the microleakage value of any tested group. Conclusion: Post systems with improved adaptation showed similar microleakage to casting posts. Key Words: Dental Microleakage; Thallium Radioisotop; Tooth Preparation, Prosthodontic |
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| کلیدواژه‌های انگلیسی مقاله |
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| نویسندگان مقاله |
3960---3961---3962---3963---3964--- |
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| نشانی اینترنتی |
http://jdt.tums.ac.ir/index.php/jdt/article/viewArticle/487 |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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| نوع مقاله منتشر شده |
Original |
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