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Evaluation Of Color Difference And Translucency Of Modified Peek Restorations Veneered With Different Veneering Materials Before And After Thermal Cycling, Mohamed Hamdy Abdulmaguied, Tarek Salah Morsi, Mennatallah M. Wahba, Hesham Katamish

Future Dental Journal

Objective: The aim of this study was to investigate the effect of different PEEK veneering materials, as well as thermocycling on the color difference (ΔE) and the translucency parameter (TP) of modified PEEK veneered restorations.

Materials and Methods: Thirty disc shaped specimens of veneered BioHPP (1.5 mm X 12 mm) were randomly divided into three groups (n=10) based on the type of the veneering material. Group (A): Discs veneered with CAD milled Lithium Disilicate, group (B): Discs veneered with pre-cured milled composite, and group (C): Discs veneered with conventional light cured composite. CIELab values were calculated for all specimens over …

Evaluation Of Colour Reproduction Of Cad/Cam Lithuim-Disilicate Veneers Of Different Thicknesses And Translucency, Sahar H. Fikry, Tarek Salah Morsi, Mennatallah M. Wahba, Amr El-Etreby

Future Dental Journal

Background: With the increasing patients’ demand for a perfect smile, the call for highly aesthetic and yet minimally invasive veneers has surmounted. Objective: The aim of this study was to evaluate the colour of CAD/CAM lithium disilicate veneers fabricated in different thicknesses and different translucencies of the lithium disilicate blocks. Materials and Methods: Forty discs of lithium disilicate glass-ceramic (IPS e.max CAD) of shade A1 of both high and low translucency (HT, LT) were tested for their colour reproduction. HT and low LT blocks were cut in the form of plates of dimensions (12 x 14 mm) and of different …

Effect Of Various Sintering Protocols On The Translucency Of Highly Translucent Cubic Zirconia, Kerolos Salah Mehany, Ashraf Hussein Sherif, Shereen Ahmed Nossair, Mona Hossam El-Din Mandour

Future Dental Journal

Aim of the study: This study was carried out to evaluate the effect of various sintering protocols on the translucency of highly translucent cubic zirconia. Materials and methods: A total of forty discs of two types of zirconia ceramics were used in this study. The specimens were divided into two main groups according to the type of zirconia; Group 1 (n=20): Cubic zirconia (DD Cube X2 98color) and Group 2 (n=20): Tetragonal zirconia (BioZX2color). Each group was subdivided into two subgroups, where 10 discs were per subgroup according to the sintering protocol. Cubic and tetragonal zirconia blanks of dimensions (98 …

Effect Of Thickness On Translucency And Masking Ability Of A Recently Developed Single-Shade Resin Composite With Enhanced Opacity: An In Vitro Comparative Study, Sayed Mohamed Ghorab, Hagag Abd Elkader Atya

Future Dental Journal

ABSTRACT

Objective: This study aimed to evaluate the effects of thickness changes on translucency and masking ability of a recently developed single shade resin composite material with enhanced opacity comparing it with a traditional opaque-shade one.

Material and methods: Two brands of composite resins; Omnichroma blocker (OCB) and G-aenial Anterior (GA) in opaque A2 (OA2) shade were selected to enroll the study. Color coordinates of each composite were determined at 0.5, 1, and 1.5 mm thicknesses (n=10/thickness) on four different backgrounds (white baking, black baking, C4 shade porcelain baking and the backing of material itself) by using a …

Evaluation Of Flexural Strength, Modulus, Translucency, Stain Resistance, And Gloss Of Different 3d Printing Materials, Shantanu Mankar

All ETDs from UAB

Background: 3D printing, the next step in digital dentistry, has improved the technical accuracy in treating patients. There are many advantages of 3D-printed techniques in the field of prosthodontics. It can be clearly experienced from an intraoral scanner, with its digital data, making many physical working models. With the recent 3D-printed, we can eliminate the traditional impression technique, similar to the fabrication procedure. The milling method, which includes a computerized programmed pattern of cutting the material with, but can be a wastage of materials along with producing noise, heat, and other components (Park, Ahn, Cha, & Lee, 2018)Objectives: To evaluate …

Comparison Of Translucency For Different Thicknesses Of Recent Types Of Esthetic Zirconia Ceramics Versus Conventional Ceramics … (In Vitro Study), Esraa Al-Juailaa, Essam Osman, Lucette Segaana, Mohammed Shrebatya, Ehab A. Farghaly

Future Dental Journal

Purpose: To compare the translucency of 6 different types of ceramic material using three different thicknesses. Materials and methods: Square shaped specimens were cut from different types of ceramics with variable translucencies (e.max CAD HT, e.max CAD LT, ultra-translucency zirconia, top-translucency zirconia, supertranslucency zirconia and high-translucency zirconia). Total samples of 144 specimens were divided into 6 main groups according to material; each group was divided into 3 subgroups according to thickness used (0.4, 0.6 and 1 mm). Using spectrophotometer each specimen was tested three times against white and black background and the average was taken to calculate translucency parameter (TP). …

Effect Of Veneering Techniques And Subsequent Aging On Translucency Of Bilayered Zirconia, Mohamed El-Agwany, Marwa Mohamed Wahsh, Tarek Salah Morsi

Future Dental Journal

Purpose: this study compared the translucency of zirconia specimens veneered with different veneering techniques, and compared the change in translucency after aging. Materials and methods: Fifty slice specimens (0.50 ± 0.01mm thick) were fabricated of IPS e.maxZirCAD core material, and ZL1 IPS e.maxZirLiner (0.10-mm thick) was layered. The specimens were randomly divided into five groups (n=10/group). Group Ι (traditional layering technique) was veneered (0.60 mm) by condensing and sintering IPS e.max Ceram low-fusing nano-fluorapatite veneering porcelain; Group ΙΙ (High translucency press on technique) was veneered (0.60 mm) by heat-pressing HT IPS e.maxZirPressfluorapatite glass-ceramic ingots; Group ΙΙΙ (Low translucency press on …

Laboratory Evaluation Of Ips-Lithium Disilicate Orthodontic Brackets (In Vitro Study), Sana R. Ubaed, Omer S. Ali

Polytechnic Journal

The purpose of the study is to evaluate the microhardness and light transmission through new Emax brackets with two ceramic brackets commercially available in the markets.The brackets were divided into three groups: (1) E max brackets (IPS E-max press, Ivoclar, Germany), (2) Gemini clear brackets (Unitek, 3M, USA), and (3) discovery pearl ceramic brackets (Dentaurum, Germany). The Vickers hardness test was used to evaluate the hardness of the wings in addition the light transmission of three brackets types were tested through using an orthodontic light cure device and light meter. The hardness test of discovery pearl ceramic brackets and Gemini …

A Comparative Evaluation Of Translucency Of Emerging Glass Ceramics And Polycrystalline Ceramics, Michael Stangler

Master's Theses

No abstract provided.

Light Transmission And Wear Of Translucent Zirconia After Conventional And Fast Sintering Cycle, Anvita Maharishi

All ETDs from UAB

ABSTRACT Introduction: Zirconia is classified by the mole percentage of yttria contained in the zirconia. The most strong and opaque material contains 3 mol % yttria, intermediate strength and opacity contain 4 mol %, and whereas 5 mol % is the weakest but most translucent zirconia. Refined zirconia powder is pressed into a mold to form a disc which is then milled to form a restoration. Post milling of sintered zirconia restorations is necessary to obtain final mechanical and physical properties of the restoration. Traditionally conventional sintering cycles required 6-8 hours to sinter. Whereas, fast sintering cycles have been have …

Effect Of Porcelain Thickness And Translucency On The Final Shade Of Ips E.Max Cad Overlaying A Dark Substrate., Peter F. Alena

Electronic Theses and Dissertations

IPS e.max is a very esthetic lithium disilicate used in dental ceramics. Unfortunately, it can unintentionally change color after cementation with resin cements. The purpose of this study is to better understand how combining thickness and translucency affects the post-cementation shade of IPS e.max CAD overlaying a dark substrate, thereby enabling clinicians to choose more appropriate techniques and materials. IPS e.max CADs (A1 shade) had either a low translucency (LT) or high translucency (HT), and cut with 0.3mm, 0.5mm, and 1.0mm thicknesses. Each sample overlaid a resin cement and dark substrate, a spectrophotometer helped derive the color difference (ΔE*ab), and …

Translucency, Stain Resistance And Hardness Of Composites Used For Invisalign Attachments, Katelyn Bowman Feinberg

All ETDs from UAB

The purpose of this study is to compare the translucency parameter, stain resistance and hardness of dental restorative composites and orthodontic adhesives in order to determine an ideal esthetic attachment material for Invisalign® treatment. Materials and Methods: Two dental restorative composites (Filtek™ Supreme Ultra, Tetric EvoCeram®) and three orthodontic adhesives (L.C.R.™, Transbond™ XT, Phase II® Dual Cure) were used in this in-vitro study. 2.0 mm thick samples of each material were fabricated in silicone molds covered with a flat sheet of Invisalign attachment template material. To evaluate the translucency parameter and stain resistance, initial L*a*b* values of each material were …

การศึกษาซิลิโคนที่ใช้ทําแบบพิมพ์หูสําหรับผู้ป่วยหูพิการ, ปิยวัฒน์ พันธุ์โกศล, รศนา เกตุทัต, ลัดดาวัลย์ สัมพันธ์ศิริกุล, นพวรรณ เจือณรงค์ฤทธิ์

Chulalongkorn University Dental Journal

วัตถุประสงค์ แบบพิมพ์หูที่ใช้ร่วมกับเครื่องช่วยฟัง สําหรับผู้ป่วยหูพิการ มีความสําคัญ โดยนําเสียงจากลําโพง เข้าสู่ช่องหู ยึดลําโพงให้ติดกับรูหูของผู้ป่วยแต่ละคน ไม่มีการรั่วของเสียงจากลําโพงสู่ภายนอก ควรมีคุณสมบัติยืดหยุ่น ดี ไม่ทําให้เจ็บ มีความทนทานต่อการฉีกขาดไม่มีรูพรุน นําคลื่นเสียงได้ดีวิธีการผลิตไม่ยุ่งยาก น้ําหนักเบา ใส และ สวยงามวัสดุที่ใช้ทําแบบพิมพ์หูในปัจจุบันยังขาดคุณสมบัติบางประการ งานวิจัยครั้งนี้ มีวัตถุประสงค์เพื่อศึกษา คุณสมบัติทางกลของวัสดุ 6 ชนิด ที่จะนํามาใช้ทําแบบพิมพ์หู วัสดุและวิธีการ ศึกษาและเปรียบเทียบคุณสมบัติทางกลอันได้แก่ ความต้านทานต่อการฉีกขาด ความแข็งผิว การ แข็งตัว ความใส และความพรุน ของซิลิโคน 6 ชนิด คือ SILICON-MICROFLEX BIOPOR PSE30 PSE70 A999 และ A595 ผลการวิจัยและสรุป จากการเปรียบเทียบปรากฏว่า PSE30 มีคุณสมบัติใกล้เคียงกับคุณสมบัติในอุดมคติของวัสดุ ที่ใช้ทําแบบพิมพ์หู มากกว่าซิลิโคนอื่น ๆ ซึ่งควรจะนํามาศึกษาคุณสมบัติอื่น ๆ เพิ่มเติมอีก ก่อนจะนํามาใช้งานในทางคลินิก