Comparison of load bearing capacity of poly ether ether ketone (peek) single crowns fabricated by two different techniques : (Record no. 170080)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 08086namaa22004211i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - أخر تعامل مع التسجيلة | |
| control field | 20250223033406.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250108s2023 |||a|||f m||| 000 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloguing agency | EG-GICUC |
| Language of cataloging | eng |
| Transcribing agency | EG-GICUC |
| Modifying agency | EG-GICUC |
| Description conventions | rda |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| Language code of summary or abstract | eng |
| -- | ara |
| 049 ## - Acquisition Source | |
| Acquisition Source | Deposit |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 617.692 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) | |
| Classification number | 617.692 |
| Edition number | 21 |
| 097 ## - Degree | |
| Degree | M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Local Call Number | Cai01.09.09.M.Sc.2023.Am.C. |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Authority record control number or standard number | Amira Ramadan Kotob Shahen, |
| Preparation | preparation. |
| 245 10 - TITLE STATEMENT | |
| Title | Comparison of load bearing capacity of poly ether ether ketone (peek) single crowns fabricated by two different techniques : |
| Remainder of title | An in-vitro study / |
| Statement of responsibility, etc. | By Amira Ramadan Kotob Shahen; Supervisors Prof. Omnia Abdel-Hamid El-Shihy, Dr. Samaa Nagy Kotb. |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | مقارنة قدرة التحمل لتيجان البولي ايثر ايثر كيتون المصنعه بطريقتين مختلفتين : |
| Remainder of title | دراسة معملية / |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Date of production, publication, distribution, manufacture, or copyright notice | 2023. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 90 pages : |
| Other physical details | illustrations ; |
| Dimensions | 25 cm. + |
| Accompanying material | CD. |
| 336 ## - CONTENT TYPE | |
| Content type term | text |
| Source | rda content |
| 337 ## - MEDIA TYPE | |
| Media type term | Unmediated |
| Source | rdamedia |
| 338 ## - CARRIER TYPE | |
| Carrier type term | volume |
| Source | rdacarrier |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.)-Cairo University, 2023. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliography: pages 83-88. |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Statement of the problem: The success of any fixed restoration depends on its longevity and performance inside the oral cavity. A continuous research process for better materials that withstand all kinds of forces during function without fracture is required. Since PEEK has been introduced to dentistry, its use as a monolithic single crown is still under investigation, and insufficient information is available about the influence of different fabrication techniques on its load-bearing capacity. Aim: To test and compare the impact of two different fabrication methods on the load-bearing capacity of full anatomical peek crowns. Materials and Methods: Twenty PEEK crowns were constructed by two different fabrication methods and divided into two groups of n = 10 each (PEEK CAD and PEEK Pressed). All crowns were constructed over a master die. For the PEEK CAD crowns, the master die was sprayed with scan spray and scanned by the 3Shape E4 scanner, Trios® 3. Ceramill4E2 Exocad CAD/CAM software and a 4-axis milling machine were used for design. For the PEEK-pressed crowns, wax copings were milled using the same STL file with the same dimensions used for designing and milling the previously constructed CAD PEEK crowns. Auto-polymerized resin was used to produce 20 duplicate resin dies, and the fitting surface of all crowns in both groups was sandblasted with 110µm alumina particles. All crowns were cemented over their corresponding epoxy dies using the (hand-mixed) dual-cured, self-adhesive resin cement (RelyXTM U200) (3-kg seating force). After 24 hours in a 37°C water incubator, samples were mechanically aged (75,000 cycles, 50 N load) with simultaneous thermocycling (2500 cycles, 5-55 °C, dwell time of 25 seconds). <br/>All samples were individually mounted on a computer-controlled universal testing machine (Model 3345; Instron Industrial Products, Norwood, MA, USA) with a load cell of 5 N until failure was recorded using computer software (Instron® Bluehill Lite Software). The load required to fracture was recorded in Newton, and failure modes were observed using a scanning electron microscope and recorded. Results: It was found that the CADCAM PEEK group recorded a statistically non-significant higher mean value with M = 2213.3 (SD = 275.88) than the PRESS group with M = 2108.5 (SD = 235.89). In the CAD group, the failure mode patterns were predominantly repairable (80%), with a minor record for catastrophic ones (20%). In the Press group, all samples demonstrated a repairable failure mode pattern (100%) with no record of a catastrophic failure mode (0%). The chi square test revealed that the difference in failure modes recorded for both groups was statistically significant (p=<0.0001<0.05). Conclusion: In this research, there was no statistically significant difference between the mean fracture loads of monolithic single crowns produced by CAD/CAM and those pressed from PEEK/C pellets. |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | الغرض من هذه الدراسة هو اختبار ومقارنة تأثير طريقتين مختلفتين للتصنيع على قدرة تحمل الأحمال للتيجان المفردة تشريحيًا بالكامل من PEEK. تم عمل عدد 20تاج مصنوع من ماده البولي أيثير أيثير كيتون بأستخدام طريقتين مختلفتين (الكاد \ كام البييك و البييك المضغوط )تم ترقيم تيجان المجموعة (أ) الكاد \ كام البييك من 1-10 المجموعة (ب) التيجان المضغوطة PEEK مرقمة من 11 إلى 20 حيث كل مجموعة بها 10من التيجان وكلاهما مبني على القالب الرئيسي. بالانتقال الي مجموعه الكاد كام بيك: تبين أن القالب الرئيسي يتم وضعه في حامل متعدد القوالب ليتم تصويره بواسطه جهاز ) (3shapeمن شركه تريوس ثم يتم تصميمه باستخدام جهاز السيراميل . بالانتقال الي مجموعه البييك: تم خرط الشمع بواسطه ذات الملف الذي يحتوي علي ذات الابعاد المحدده سابقه من قبل. تم استخدام الراتينج المبلمر الأوتوماتيكي لإنتاج 20 قالب راتينج مكرر ، تم صقل السطح الداخلي للتيجان بالرمل بجزيئات الألومينا 110 ميكرومتر. تم لصق جميع التيجان فوق قوالب الإيبوكسي المقابلة لها باستخدام أسمنت راتينج (مخلوط يدويًا) مزدوج الالتصاق (RelyX ™ U200) (قوة جلوس 3 كجم). تم تخزين العينات في حاضنة مائية لمدة 24 ساعة (37 درجة مئوية) ؛ بعد ذلك ، تعرضوا للشيخوخة الميكانيكية (75000 دورة ، حمل 50 نيوتن) مع التدوير الحراري المتزامن (2500 دورة ، 5-55 درجة مئوية ، 25 ثانية زمن السكون). تم تركيب جميع العينات بشكل فردي على جهاز تحكم بالكمبيوتر (آلة اختبار عالمية) (موديل 3345 ؛ Instron Industrial Products ، Norwood ، MA ، الولايات المتحدة الأمريكية) مع خلية تحميل من 5 N حتى تم تسجيل الفشل باستخدام برنامج الكمبيوتر (Instron® Bluehill Lite Software) . تم تسجيل الحمل المطلوب للكسر في نيوتن ولوحظت أوضاع الفشل باستخدام مجهر المسح الإلكتروني. أثبتت النتائج أن مجموعة الكاد \ كام البييك سجلت قيمة متوسطة أعلى غير معنوية إحصائياً مع M = 2213.3 (SD = 275.88) من مجموعة البييك المضغوط M = 2108.5 (SD = 235.89). في مجموعة الكاد \ كام البييك ، كانت أنماط وضع الفشل قابلة للإصلاح في الغالب (80 ٪) مع سجل ثانوي لنمط كارثي (20 ٪). بينما في المجموعة البيك المضغوط، أظهرت جميع العينات نمط فشل قابل للإصلاح (100٪) مع عدم وجود سجل لنمط كارثي (0٪). |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Issues CD | Issues also as CD. |
| 546 ## - LANGUAGE NOTE | |
| Text Language | Text in English and abstract in English. |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Crown Dentistry |
| Source of heading or term | qrmak |
| 653 #0 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | PEEK |
| -- | CAD-CAM |
| -- | Press |
| -- | fracture resistance |
| -- | thermomechanical |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Omnia Abdel-Hamid El-Shihy |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Samaa Nagy Kotb |
| Relator term | thesis advisor. |
| 900 ## - Thesis Information | |
| Grant date | 01-01-2023 |
| Supervisory body | Omnia Abdel-Hamid El-Shihy |
| -- | Samaa Nagy Kotb |
| Universities | Cairo University |
| Faculties | Faculty of Dentistry |
| Department | Department of Major Fixed Prosthodontics& Minor Removable Prosthodontics |
| 905 ## - Cataloger and Reviser Names | |
| Cataloger Name | Sara Salah |
| Reviser Names | Huda |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Edition | 21 |
| Suppress in OPAC | No |
| Source of classification or shelving scheme | Home library | Current library | Date acquired | Inventory number | Full call number | Barcode | Date last seen | Effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | قاعة الرسائل الجامعية - الدور الاول | 08.01.2025 | 89893 | Cai01.09.09.M.Sc.2023.Am.C. | 01010110089893000 | 08.01.2025 | 08.01.2025 | Thesis |