Internal fit and marginal adaptation of posterior cad/cam crowns fabricated from the new fully crystallized lithium disilicate compared to partially crystallized lithium disilicate with two finish line thicknesses : (Record no. 172646)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 08879namaa22004211i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - أخر تعامل مع التسجيلة | |
| control field | 20250618153306.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250618s2024 ua a|||frm||| 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 | 617.69 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) | |
| Classification number | 617.69 |
| Edition number | 21 |
| 097 ## - Degree | |
| Degree | M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Local Call Number | Cai01.09.09.Ph.D.2024.Me.I |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Authority record control number or standard number | Mennatalla Ahmed Emad ElGendy, |
| Preparation | preparation. |
| 245 10 - TITLE STATEMENT | |
| Title | Internal fit and marginal adaptation of posterior cad/cam crowns fabricated from the new fully crystallized lithium disilicate compared to partially crystallized lithium disilicate with two finish line thicknesses : |
| Remainder of title | An In-Vitro Study / |
| Statement of responsibility, etc. | by Mennatalla Ahmed Emad ElGendy ; Supervisors Dr. Rana Sherif,Dr. Karim Aboubakr. |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | التناسب الداخلى والفجوه الهامشيه لتيجان كاد/كام التى تم انشاؤها من ثنائى سيليكات الليثيوم المتبلور بالكامل مقارنة بسيليكات الليثيوم المتبلور جزئيا،ً بسماكتين لخط النهاية : |
| Remainder of title | دراسة معملية / |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Date of production, publication, distribution, manufacture, or copyright notice | 2024. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 111 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 (Ph.D)-Cairo University, 2024. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliography: pages 99-108. |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | With the rising emphasis on esthetics and the growing awareness of conservation, ceramic restorations have become increasingly used. This can be attributed to their exceptional esthetic and biocompatible properties. Lithium disilicate restorations gained popularity in the past decade due to their exceptional esthetic qualities.<br/>GC Initial Lisi ceramic is marketed with a notable feature known as HDM technology. This technology is claimed to simplify the milling process by allowing the material to be used in a fully crystallized phase.<br/>The selection of the finish line design is an important element that impacts the internal fit and marginal adaptation of fixed prosthesis. Different types of finish lines are proposed depending on the material being used.<br/>The aim of this study is to evaluate internal adaptation and marginal fit of posterior CAD/CAM crowns fabricated from either partially crystallized lithium disilicate or fully crystallized lithium disilicate with two finish line thicknesses (0.5mm chamfer and 1 mm round shoulder) before and after cementation. Twenty sound, extracted human first molar teeth, free of caries, cracks and fractures, were collected. The teeth were stored in saline solution for two months until use. The teeth were prepared by a dental surveyor. Teeth were divided according to glass ceramic into main groups; group (1) Lithium Disilicate (IPS e.max CAD), and group (2) Fully crystallized lithium disilicate (GC Initial LiSi) and group. Each group were further subdivided according to finish line thickness 0.5 mm chamfer and 1 mm round shoulder finish lines. The prepared teeth were scanned using lab scanner and teeth designing was performed using exocad. The crowns grinding was performed using 5-axis milling machine VHF S1. Crystallization is carried out for IPS e.max CAD only. After that, polishing was performed for both groups.<br/>110<br/>All samples were tested for internal fit by triple scanning technique and the marginal adaptation were measured by stereomicroscope. For the internal fit measurements, triple scan technique was used by using Geomagic control X 2022 1.0. where three scans were obtained using intraoral scanner Medit i500 and superimposition of these scans was done. The marginal gap was then evaluated using stereomicroscope before and after cementation by choosing five predetermined equally distributed points. The points were located at the midline, line angles, and a midpoint in between the midline and each line angle. The results for the present study showed that the finish line thicknesses (0.5 mm chamfer, 1 mm round shoulder) regardless the two ceramic types had no statistically significant effect on mean internal fit (P=0.954). Also, the ceramic types (IPS e.max CAD and GC Initial Lisi) had no statistically significant effect on mean internal fit (p=0.902). Regarding the marginal adaptation, IPS e.max CAD showed statistically significantly higher mean marginal gap distance than GC Initial LiSi regardless of the finish line thicknesses (p<0.001). Cementation regardless of the two ceramic types and the finish line thicknesses has a statistically significant effect on mean marginal gap distance (p<0.001).). |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | أدى زيادة الوعى والتركيز المتزايد على جماليات الترميمات السنية الى اكتساب الترميمات الخزفية شعبية متزايدة فى العقد<br/>الماضى وخاصة ترميمات الليثيوم ديسيليكات لصفاتها الجمالية الاستثنائية وتوافقها الحيوى مع الأنسجة الطبيعية.<br/>ويعتبر سيراميك CG Initial Lisi من أنواع الليثيوم ديسيليكات التى تتميز بتقنية HDM التى تعمل على تبسيط عملية<br/>خرط الترميمات الخزفية من خلال السماح باستخدام المادة في مرحلة التبلور الكامل, كما يعد تصميم خط النهاية عنصرًا<br/>مهمًا يؤثر على الملائمة الداخلية والتكيف الهامشى للاستعاضات السنية المثبتة والذى يعتمد فى اختياره على المواد المستخدمة .<br/>الهدف من هذه الدراسة هو تقييم التكيف الداخلى والملاءمة الهامشية لتيجان الكاد-كام الخلفية المصنعة من الليثيوم ثنائي<br/>السيليكات المتبلور بالكامل ومن الليثيوم ثنائي السيليكات المتبلور جزئيًا مع تصميمين مختلفين لخط النهاية سمك 0.5 مم<br/>وسمك 1 مم قبل وبعد اللصق.<br/>اشتمل البحث على الحصول على عدد عشرين ضرسا بشريا سليما خاليا من التسوس والشقوق والكسور وتقسيمهم وفقا<br/>لنوع السيراميك الى مجموعتين رئيسيتين: مجموعة ) 1 ( الليثيوم ثنائي السيليكات المتبلور جزئيًا ) IPS e.max CAD )<br/>والمجموعة ) 2 ( الليثيوم ثنائي السيليكات المتبلور بالكامل ) CG Initial Lisi ( وتقسيم كل مجموعة الى مجموعتين<br/>فرعيتين وفقا لتصميم وسمك خط النهاية: مجموعة فرعية ) 1 ( سمك 0.5 مم ومجموعة فرعية ) 2 ( سمك 1 مم.<br/>استخدم الماسح الضوئي المعملى لمسح الأسنان المحضرة والإكزوكاد لتصميم التيجان وتبعا لارشادات الصناع لكل نوع<br/>سيراميك تم خرط التيجان بواسطة جهاز VHF S1 خماسى المحاور.<br/>تم اختبار جميع العينات للتأكد من ملاءمتها الداخلية وقياس المطابقة الداخلية بواسطة تقنية المسح الثلاثى باستخدام التحكم<br/>Geomagic X 2022 1.0. وقياس التكيف الهامشى بواسطة المجهر المجسم قبل وبعد اللصق من خلال اختيار خمس نقاط<br/>موزعة بالتساوى ومحددة مسبقًا.<br/>أظهرت نتائج الدراسة الحالية أن سمك خط النهاية لم يكن له تأثير ذو دلالة إحصائية على متوسط المطابقة الداخلية لنوعى<br/>السيراميك المستخدمين. وفيما يتعلق بالتكيف الهامشى، أظهر IPS e.max CAD متوسط مسافة فجوة هامشية أعلى بشكل<br/>ملحوظ إحصائيًا عن CG Initial Lisi بغض النظر عن سمك خط النهاية فى حين أظهرت قياسات التكيف الهامشى قبل<br/>اللصق فرقا ذا دلالة إحصائية على متوسط الفجوة الهامشية بعد اللصق . |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Issues CD | Issues also as CD. |
| 546 ## - LANGUAGE NOTE | |
| Text Language | Text in English and abstract in Arabic & English. |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Prosthodontics |
| Source of heading or term | qrmak |
| 653 #0 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Lithium disilicate |
| -- | computer aided design computed aided manufacturing |
| -- | internal fit |
| -- | marginal adaptation |
| -- | finish lines |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Rana Sherif |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Karim Aboubakr |
| Relator term | thesis advisor. |
| 900 ## - Thesis Information | |
| Grant date | 01-01-2024 |
| Supervisory body | Rana Sherif |
| -- | Karim Aboubakr |
| Universities | Cairo University |
| Faculties | Faculty of Dentistry |
| Department | Department of Prosthodontics |
| 905 ## - Cataloger and Reviser Names | |
| Cataloger Name | Shimaa |
| 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 | 18.06.2025 | 91430 | Cai01.09.09.Ph.D.2024.Me.I | 01010110091430000 | 18.06.2025 | 18.06.2025 | Thesis |