Prosthodontics and Prosthodontology Commons^™

Flexure Strength Of Methacrylate- And Ormocer-Based Bulk Fill Resin Composites: Effect Of Material Thickness And Distance To Photo-Polymerization Device., Sara Adel Botros

Dentistry

This study evaluated the effect of thickness and photo-polymer- ization distance on flexure strength of two bulk fill resin compo- sites. In total, 96 rectangular-shaped resin composite bars were divided into eight experimental groups (n ¼ 12/group) according to the three experimental factors; Factor 1: Material (X-tra fil and Admira Fusion X-tra), Factor 2: Thickness (2 mm and 4 mm) and Factor 3: photo-polymerization distance (2 mm and 8 mm). The bars were prepared with fixed 2 mm width and 2 mm length but differed in thickness (2 mm or 4 mm). The bars were light cured either at 2 …

Comparison Of Implant-Retained Overdenture And Conventional Complete Denture In The Edentulous Mandible: A Survey Study To Measure Patients' Satisfaction And Quality Of Life In Dental School Clinical Environment, Ahmad Kutkut

Theses and Dissertations--Clinical and Translational Science

Patient satisfaction and quality of life are integral parts of assessing the quality of oral health care. Current aging population trends suggest a growing need to understand the effects of edentulism on oral health and quality of life. As the proportion of aged Americans expands, there will be an increased need to understand treatment options and patient communication strategies. In addition, as new treatment options and innovative technologies emerge, it will be essential to understand patients' concerns and identify best practices associated with denture treatments' individual fit and function. Advanced denture treatments can now be fabricated using CAD/CAM digital denture …

การเปรียบเทียบสมบัติเชิงกลของซิลิโคนอีลาสโตเมอร์ในงานบูรณะใบหน้าและขากรรไกร ก่อนและหลังได้รับพลังงานไมโครเวฟ, เพ็ญชนก แสนทวีสุข

Chulalongkorn University Theses and Dissertations (Chula ETD)

วัตถุประสงค์ของงานวิจัยเพื่อศึกษาสมบัติเชิงกลของซิลิโคนอีลาสโตเมอร์ในงานประดิษฐ์ ใบหน้าและขากรรไกรชนิด VST-50 และ M511 ที ่ใส่เม็ดสีและไม่ใส่เม็ดสี ก่อนและหลังได้รับการ แช่ในน้ำที ่ทำให้ร้อนด้วยพลังงานจากเตาไมโครเวฟโดยจำลองการใช้เตาไมโครเวฟ 18 เดือน ชิ ้นงานตัวอย่าง 80 ชิ ้นต่อซิลิโคนแต่ละชนิด ทั ้งหมด 160 ชิ ้น จัดเป็น 2 กลุ ่มตามการเติมเม็ดสีคือ ชิ ้นงานที ่ไม่มีสีและชิ ้นงานมีสี โดยเป็นเม็ดสีชนิดซิลิโคน และแบ่งออกเป็นกลุ ่มควบคุมและกลุ ่มเข้า เตาไมโครเวฟ รูปร่างชิ ้นงานถูกขึ ้นรูปตามมาตรฐาน ASTM D412 และ D624 ทั ้งหมดมี 8 กลุ่ม ย่อย (n=10) ต่อซิลิโคนแต่ละชนิด การนำชิ ้นงานเข้าไมโครเวฟร่วมกับการแช่น้ำ เป็นเวลา 6 นาที ที่ 660 วัตต์ 18 ครั ้ง เป็นการจำลองการใช้งานเดือนละ 1 ครั ้ง อุณหภูมิของน้ำภายหลังการเข้า ไมโครเวฟคือ 60 องศาเซลเซียส จากการวิเคราะห์ความแปรปรวนแบบ 2 ทาง (a=.5) พบว่า ซิลิโคน VST-50 ชนิดของเม็ดสีมีผลต่อความทนต่อแรงดึงและความแข็งของชิ ้นงานซิลิโคนอย่างมี นัยสำคัญทางสถิติ (P<.001) ทั ้งกลุ ่มควบคุมและเข้าเตาไมโครเวฟ ขณะที ่การใช้เตาไมโครเวฟมีผล ต่อความทนต่อการฉีกขาดอย่างมีนัยสำคัญทางสถิติ (P<.05) ทั ้งกลุ ่มไม่มีสีและมีสี และทั ้งสอง ปัจจัยไม่มีผลต่อร้อยละการยืดตัว ขณะที ่ซิลิโคน M511 มีปฏิสัมพันธ์กันระหว่างปัจจัยการผสมเม็ด สีและการเข้าไมโครเวฟอย่างมีนัยสำคัญทางสถิติสำหรับความแข็ง (P<.05)

The Efficacy Of Universal Ceramic Polishing Kit On The Surface Roughness Of Various Ceramic Types, Ekaluck Poosanthanasarn

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this vitro study was to determine the effect of polishing performance of a universal ceramic polishing kit on the surface roughness of various ceramics. The ceramic specimen size 5 x 7 x 4 mm of lithium disilicate glass ceramic (IPS e.max CAD, Ivoclar Vivadent, Liechtenstein), translucent zirconia (VITA YZ XT, VITA Zahnfabrik, Germany) and zirconia-reinforced lithium silicate (Celtra Duo, Dentsply Sirona, United States) (n=8) were fixed with clear resin in PVC block, 14 mm in diameter. The specimens were ground with fine diamond bur for 15 seconds to simulate clinical gross contouring.The two-step polishing process started with …

The Effects Of The Oral Exercises On The Oral Function Of People With Dementia, Kwanrutai Somsak

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this study was to examine the effects of the home-based oral exercises on the oral function in people with mild to moderate dementia. The patients with mild to moderate dementia at King Chulalongkorn Memorial Hospital, who were randomly allocated to an experimental group (n = 11), were asked to perform 3 home-based oral exercises for 3 months while those in a control group (n = 11) did not do any oral exercises. The oral function including maximum tongue pressure (MTP), oral diadochokinesis (ODK) rates of /ta/, /ka/, /pa/, swallowing function (modified water swallowing test: MWST), and oral …

Antifungal, Physical, And Mechanical Properties Of Tissue Conditioner Incorporated With Zinc Oxide Nanoparticles, Woraporn Homsiang

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study evaluated the antifungal, physical, and mechanical properties of tissue conditioner incorporated with different amounts of zinc oxide nanoparticles (ZnOnps) at different storage times (0, 7, and 14 days). Specimens of 0, 5, 10, 15 wt% ZnOnps, or 15 wt% nystatin incorporated into tissue conditioner were fabricated. The direct contact test (n=6) was performed to evaluate the antifungal effect against C. albicans suspension. Scanning electron microscopy and energy dispersive X-ray spectroscopy (n=6) were used to observe the amount and distribution of superficial zinc element. The penetration depth (n=6) and tensile bond strength (n=8) were evaluated following ISO 13139. The …

Retentive Force Change Of Nylon Insert In Locator R-Tx Attachment After Brushing Test, Wasita Pongwattana

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to evaluate the effect of brushing on the percentage change of retentive force in Locator R-Tx attachment. There were 3 types of nylon inserts; blue, pink, and clear. The nylon inserts were brushed in 2 media; water and toothpaste. Each group had 6 specimens (n=6). All specimens were soaked in deionized water at 37 ºC for 7 days, after that they were placed in the simulated brushing machine. Before and after they underwent 5,000 brushing cycles, the retention test of each specimen was measured with a universal testing machine. The retentive forces were repeatedly measured 5 times …

Accuracy Of Implant Placement Utilizing Stereolithographic Guides Printed With And Without Cross-Arch Stabilization Struts, Caitlin Libby Dds

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objectives: The purpose of this study was to assess the accuracy of implant placement using stereolithographic guides printed with and without stabilization struts by comparing the post-operative position to the planned implant position.

Methods: A pre-operative cone-beam computed tomography (CBCT) of a drillable maxillary model was obtained and data was uploaded into coDiagnostiX for preoperative planning. The implant position was planned in an edentulous space of #5 using a 3.3x10mm Bone Level Tapered (BLT) implant (Straumann). Ten surgical guides were designed utilizing a stabilization strut (Group A), while ten guides were designed without the stabilization strut (Group B). Twenty guides …

Accuracy Of Digital Impressions At Varying Implant Depths: An In-Vitro Study, Vivia Sequeira

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: Implants placed at variable depths may vary the amount of visible scannable surface of a scan body. Intraoral scanner technology uses advanced optical principles to record the surface of the scan body to accurately capture the implant position.

Purpose: To investigate the effect implant placement depth has on the accuracy of digital implant impressions using an intraoral scanner.

Materials & Methods: A partially edentulous gypsum master model was fabricated to allow the positioning of a single implant analog at different depths. Four groups based on the planned implant depths of 0, 3, 6 and 7mm and corresponding visibility of …

Care And Maintenance Of Dental Restorations, Ibeth Erazo

Publications and Research

Contributing to the longevity of the restoration by minimizing the effects of surface corrosion, maintaining the esthetic appearance and the smooth surface characterization, and contributing to gingival health by lessening the potential for plaque retention are the principal reasons for taking care of dental restorations. However, during oral hygiene routine procedures and prevention treatments, these desired effects are not always achieved. In many cases, the restorative materials are not identified in a patient’s record leading to damage during oral hygiene performance by dental professionals. Therefore, it is important to be able to recognize the different restorative materials and employ the …

Stress Analysis Comparing Effect Of Two Different Cad-Cam Implant Superstructure Materials (In-Vitro Study), Noura Turky Saad, Essam Osman, Ahmed M. Abdelhamid, Mohamed Shokry, Ehab A. Farghaly

BAU Journal - Creative Sustainable Development

Purpose: This study was conducted to evaluate the micro-strain around dental implant using two different CAD/CAM crown fabricated materials through strain gauge analysis. Materials and Methods: Five dental implants were fixed in a 5 previously drilled solid rigid polyurethane test blocks in the edentulous area with neighboring abutments mesial and distal printed out using special 3D Dental printer, Cyanoacrylate adhesive was then used to fix the printed-out part on to the polyurethane test blocks, creating the bounded saddle replicas. Ten CAD/CAM screw retained crowns were fabricated; five Enamic crowns from vita enamic blocks, and five zirconia crowns from presintered katana …

The Effect Of Artificial Aging And Surface Treatments On Microtensile Bond Strength Of Resin Cement To Hybrid Ceramics, Engy I. Hassan Shohdy, Shereen A. Nossair, Amina M. Hamdy

Future Dental Journal

Purpose: To assess the effect of aging and various surface treatments on the microtensile bond strength of resin cement to two hybrid esthetic materials. Materials and Methods: Zirconia-reinforced lithium silicate (Celtra Duo, Dentsply Sirona, United States) and hybrid resin nanoceramic (Cerasmart TM, GC Corporation, Japan) blocks were cut into plates of 3 mm thickness. Each ceramic material was surface treated either with hydrofluoric acid etching and silane or with sandblasting and silane. A dual-cured adhesive resin cement (Panavia TM V5, Kuraray, U.S.A.) was utilized to bond the composite resin plates to the surface treated ceramic plates. The ceramic-composite resin blocks …

Nanomaterials And Nanorobotics In Dentistry: A Review, Yelda Kasimoglu, Derya Tabakcilar, Zeynep A. Guclu, Seiko Yamamoto-Nemoto, Elif B. Tuna, Bugra Ozen, Tamer Tuzuner, Gökhan Ince

Journal of Dentistry Indonesia

Nanotechnology is a branch of science focusing on the manipulation of materials measured on the nanoscale (size = 1–100 nm). Recent advances in the field of nanodentistry have resulted in the development of alternative treatment plans for common dental problems, bringing about a paradigm shift in dentistry. Nanorobots, also known as “nanites” or “nanomachines,” are theoretical microscopic devices that may be used for the diagnosis and treatment of oral health problems. This paper aims to discuss the latest innovations in the field of nanodentistry.

Oral Rehabilitation Of A Patient With Congenital Erythropoietic Porphyria: A Rare Case Report, Raif Alan, Hakkı Çelebi, Fahriye Kilinc, Recep Dursun

Journal of Dentistry Indonesia

Congenital erythropoietic porphyria (CEP) is an extremely rare disorder involved in chronic porphyrias. One of the recommended evaluations to determine disease severity and needs of a person with CEP is dental assessment. Objective: To present a case of CEP and its oral rehabilitation. Case Report: A 32-year-old female patient was admitted to the clinic with hyperkeratinization, skin fragility, fissures, and wounds in her perioral region and hands. Intraoral gingival bleeding, mucogingival stress, and missing teeth were recorded. After medical consultation, phase I and II periodontal therapies were performed. The patient expressed satisfaction of the results of the procedures in terms …

Effect Of Nanofiller Coating And Loading On Facial Elastomer Physical Properties, Rahmi K. Aulia

Theses & Dissertations

Current materials used for facial prostheses are far from being desirable, and improved properties with “skin-like” feel are needed. This study evaluates property changes induced by sequential additions of uncoated and hydrophobic-coated nano-SiO₂ to polydimethylsiloxane (PDMS) and compares them with those measured for conventional submicron SiO₂-filled materials. Each filler type was sequentially added to vinyl-terminated PDMS at 0%, 0.5%, 5%, 10%, and 15% by weight. Tensile, tear, Durometer hardness, translucency and viscoelastic properties were evaluated, with hardness and translucency also evaluated following 3000 hours of outdoor weathering. Results demonstrated that 15% coated nano-SiO₂-filled PDMS materials …

Cad/Cam Milling Versus Rapid Prototyping Surgical Guide Techniques In Dental Implant Placement, Fardos N. Rizk Prof., Marwa Sabet Prof., Hebatallah Mohammed, Adham Elghamry

Dentistry

No abstract provided.

Efficacy Of Stem Cell Allograft In Maxillary Sinus Bone Regeneration: A Randomized Controlled Clinical And Blinded Histomorphometric Study, Josh Whitt, Mohanad Al-Sabbagh, Dolph R. Dawson Iii, Ehab Shehata, Moly Housley-Smith, Alejandro G. Villasante Tezanos, Ahmad Kutkut

Oral Health Practice Faculty Publications

Purpose: This study aimed to evaluate the quality and quantity of newly generated bone in the maxillary sinus grafted with stem cell-based allograft material.

Methods: This study was a single site, prospective, blinded, randomized, and controlled clinical trial. Eleven subjects with 18 edentulous posterior maxillary sites requiring sinus augmentation for delayed implant placement using a lateral window approach were enrolled. At the time of sinus augmentation, test sinus was grafted with stem cell-based allograft (Osteocel Plus; NuVasive Therapeutics), while the control sinus was grafted with conventional cortico-cancellous allograft (alloOss; ACE Surgical). Cone beam computer tomography (CBCT) scan was taken before …

Replacing A Single Tooth: Single Implant Vs. Three Unit Bridge, Ibeth Erazo, Aneeza Hussain

Publications and Research

There are more than two options for restoring a single tooth but our research includes a three-unit bridge and a single-tooth implant as the main options. In this paper, we discuss the advantages and disadvantages of these methods and the factors that must be considered when choosing between them for the replacement of a single tooth. Although in some cases a three-unit bridge is the most appropriate choice, implants have the advantage of allowing preservation of the integrity of sound teeth adjacent to the edentulous area. Many factors must be considered when choosing between a three-unit bridge and an implant …

Preheating-Temperature Affects Nanoleakage And Degree Of Conversion Of Dual-Cured Adhesive/Resin-Composite, Sara Adel Botros, Farid Sabry El-Askary, Zainab Diaa Soliman, Dalia Ibrahim El-Korashy

Dentistry

No abstract provided.

Current Status Of Magnetic Resonance On Saliva For Oral And Dental Health Early Diagnosis, Anastasia Katsavochristou, Dimitrios Koumoulis

Oral Health Practice Faculty Publications

Magnetic resonance spectroscopy of biomolecules has recently gained attention for clinical diagnosis. Its combination with saliva collection and analysis can promote early disease detection and monitoring, by identifying biomarkers of specific underlying pathology or disease as detected in saliva. With this novel, non-invasive technique, certain salivary biomarkers have been linked to dental and periodontal tissues pathology, as well as to specific head and neck cancer malignancies. At present, diagnostic biomarkers are still in need for further identification (e.g., diagnosis and monitoring of Sjögren’s syndrome), and nuclear magnetic resonance spectroscopy has been found to be a promising technique to compliment the …