Dentistry Commons^™

Microleakage Of Class Ii Restoration Using Short-Fiber Reinforced Flowable Resin Composite, Parichat Panyawisitkul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective. With short-fiber reinforced resin composite (SFRC), improved mechanical strength and good workability could be achieved within a single material. However, there remains concerns related to microleakage, which could restrict the application of this material in certain clinical situations. Materials and Methods. Class II cavities were prepared in 80 premolars. Each group, consisting of 10 specimens, was restored with different materials: flowable bulk-fill SFRC (EverX Flow, EXF), bulk-fill SFRC (EverX Posterior, EXP), flowable bulk-fill (Tetric N-Flow, TNF), and conventional resin composite (Z350 XT, Z350). The specimens were divided into two subgroups: one underwent thermocycling of 20,000 cycles, while the other …

Gene Expression Of Soft Tissue Covering Bone Grafted With Xenograft In Human, Atithan Termworasin

Chulalongkorn University Theses and Dissertations (Chula ETD)

Soft tissue is one of many factors that influence the esthetic success of dental implants. This study explores soft tissue reaction between soft tissue covering bone grafted with xenograft and soft tissue in normal healing by analyzing the levels of inflammatory cytokine including TNF-α, IL-6, IL-8 and NF-kB1. Soft tissues are collected after 4 to 6 months of healing and analyzed by reverse transcription quantitative polymerase chain reaction (RT-qPCR). The result shows that the relative gene expression of TNF-α, IL-6, IL-8, and NF-kB1 are not significantly different in soft tissue covering xenograft compared to the ones in soft tissue covering …

Effect Of Variations In Translucency Of Cad/Cam Lithium-Disilicate Ceramic And Abutment Color On Optical Color Of Veneer Restoration, Wichaya Likitnuruk

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to evaluate the optical color of different translucencies of CAD/CAM lithium-disilicate ceramics on backgrounds with different values. Low translucency (LT) and medium translucency (MT) rectangular-shaped specimens (0.6 mm thickness, shade A1) were fabricated from IPS e.max CAD (EMC; Ivoclar Vivadent) and Amber Mill (AM; HASS). Six specimens of EMC-MT, EMC-LT, AM-MT, and AM-LT were fabricated, resulting in 24 specimens in total. The specimens were placed on six background colors (1M1(reference), 1M2, 2M2, 3M2, 4M2, and 5M2) made of light-cured resin composite (Vita VM LC Base Dentine, Vita Zahnfabrik) using glycerine as a medium. The CIE L*a*b* coordinates …

The Effect Of Surface Treatment And Types Of Translucent Monolithic Zirconia On The Shear Bond Strength Of Porcelain Repaired To Zirconia, Karnkanith Hansomwong

Chulalongkorn University Theses and Dissertations (Chula ETD)

In the event of proximal contact loss in a zirconia crown on an implant, the zirconia crown can be modified by adding porcelain to recreate the proximal contact. This study investigated the shear bond strength between translucent zirconia (4Y-PSZ) and veneering porcelain compared to conventional zirconia (3Y-TZP). Zirconia substructures were treated with airborne-particle abrasion with Al2O3. The results of the shear bond strength test were analyzed by One-way ANOVA and post-hoc comparisons with Tukey’s honest significant difference (HSD) test. The shear bond strengthranged from 21.87 and 27.79 MPa. The failure mode was mixed failure in all groups. From the results, …

Influence Of Ceramic Translucency, Ceramic Thickness, And Shades Of Luting Resin Cement On Final Color Of Cad/Cam Lithium Disilicate Veneers, Ploypailin Radeesujalitkul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Purpose. To evaluate the effect of ceramic translucency, ceramic thickness, and cement color on the final optical color of a CAD/CAM lithium disilicate ceramic. Methods. A total of 180 ceramic specimens were prepared into two thicknesses, 0.5 and 1.0 mm, from high translucency (HT), medium translucency (MT), and low translucency (LT) CAD/CAM lithium disilicate ceramics (IPS e.max CAD; Ivoclar Vivadent) in shade A1. Substrates were fabricated from resin composite in shade A3. Two shades of light-cure resin cement, neutral and light plus (Variolink Esthetic LC; Ivoclar Vivadent), were used for cementation, whereas glycerine was used for the control groups. CIE …

A Comparison Of Fracture Load After Mechanical Cyclic Loading Between 3 Different Materials And 2 Designs On Implant-Supported Crown : An In Vitro Study, Thanus Liwwattanakorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: To compare the fracture resistance among ultra-translucent zirconia, lithium disilicate, and composite resin implant-supported maxillary premolar crowns with cement-retained or combined cement- and screw-retained designs after cyclic loading simulation. Materials and Methods: Forty-eight maxillary first premolar crowns and their abutments were attached on dental implants (ø4.0 x 10 mm) embedded in epoxy resin blocks. All specimens were equally divided into 6 groups (n=8) based on monolithic crown material (ultra-translucent zirconia (Z), lithium disilicate (L), and composite resin (C)) and restoration design (cement-retained and combined cement- and screw-retained). Each specimen was subjected to 500,000 cycles of cyclic loading. Subsequently, a …

Effects Of Self-Adhesive Resin Cements Cured With Different Light Sources On Human Gingival Fibroblasts, Siriwong Wongsirisuwan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Improperly polymerized self-adhesive resin cements (SARCs) can lead to adverse effects such as periodontitis or peri-implantitis. This in vitro study investigated the effect of 2 light-polymerizing units (LPUs) on the physical and chemical properties of 2 SARCs under varying simulated clinical scenarios and the responses of primary human gingival fibroblasts (hGFs) exposed to such procedures. Dental cement discs of SARCs (depth=2 mm, diameter=5 mm) were prepared with cylindrical acrylic molds. Kerr DemiPlus and 3M Elipar DeepCure-S LED LPUs were used to polymerize 2 different SARCs (RelyX U200 and Maxcem Elite Chroma). The polymerization protocols were either directly light-polymerized or through …

The Ethical Basis For Student-To-Student Training In Dentistry, Larry E. Jenson Dds, Ma, Joel M. White Dds, Ms

Journal of the American College of Dentists

This article will focus on the most ethically contentious student-to student training practice: local anesthesia administration. We will examine the factors that contribute to a broader understanding of the ethical issues involved and introduce a framework that will help to clarify these issues. We have identified six stakeholders in this issue: the student-as-patient, the student-as-student, the university, the faculty, the general public and the profession.

Effects Of Intermittent Compressive Force On Extracellular Matrix Homeostasis Of Human Periodontal Ligament Stem Cells, Novena Dameria Pakpahan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Mechanical force, caused by orthodontic tooth movement, affects periodontal tissue homeostasis including destruction and formation. For instance, the compression side causes bone resorption while bone formation lines in the tension side. Periodontal ligament cells play roles in modulating periodontal tissue homeostasis as well as regeneration via immunomodulation, proliferation, and migration. Extracellular matrix (ECM) is a cellular microenvironment that aids in cell migration, cell growth, and differentiation and serves as a physical barrier against microorganisms. Matrix metalloproteinase (MMP) plays a key role in the degradation of ECM, including collagen, gelatines, and casein. The MMP functions can be inhibited by tissue …

Expert Search For "Direct Materials For Restoring Caries Lesions", Kelly K. O'Brien

Expert Search Strategies

This search strategy was constructed to support the research for the peer reviewed article listed above. Full article abstract:

Background

The goal of restoring caries lesions is to protect the pulp, prevent progression of the disease process, and restore the form and function of the tooth. The purpose of this systematic review was to determine the effect of different direct restorative materials for treating cavitated caries lesions on anterior and posterior primary and permanent teeth.

Type of Studies Reviewed

The authors included parallel and split-mouth randomized controlled trials comparing the effectiveness of direct restorative materials commercially available in the United …

Use Gpt-J Prompt Generation With Roberta For Ner Models On Diagnosis Extraction Of Periodontal Diagnosis From Electronic Dental Records, Yao-Shun Chuang, Xiaoqian Jiang, Chun-Teh Lee, Ryan Brandon, Duong Tran, Oluwabunmi Tokede, Muhammad F Walji

Faculty, Staff and Student Publications

This study explored the usability of prompt generation on named entity recognition (NER) tasks and the performance in different settings of the prompt. The prompt generation by GPT-J models was utilized to directly test the gold standard as well as to generate the seed and further fed to the RoBERTa model with the spaCy package. In the direct test, a lower ratio of negative examples with higher numbers of examples in prompt achieved the best results with a F1 score of 0.72. The performance revealed consistency, 0.92-0.97 in the F1 score, in all settings after training with the RoBERTa model. …

Randomized Control Trial Of A Novel Dental Gel As An Adjunct To Scaling And Root Planing In Subjects With Stage Ii & Iii Periodontitis, Sarah Pham

All ETDs from UAB

The current standard of care for treating chronic periodontitis is scaling and root planing (ScRP) followed by supportive periodontal therapy (SPT) (Cobb et al., 2021; Ramfjord et al., 1987). The goal of ScRP is to eliminate supra- and subgingival bacterial deposits and to reduce periodontal pathogens, inflammation, and pocket depths (Greenstein, 2000). Although ScRP has been shown to significantly improve baseline clinical parameters, moderate to advanced cases may require additional surgical therapy which many patients resist (Stambaugh, 1981; Becker et al., 2001). Currently, no dentifrice used adjunctively has been proven to increase the therapeutic effects of scaling and root planing. …

Geriatric Esthetics: A Comparison Of Prosthodontists, General Practitioners, And Laypeople's Perception, Rawinun Puangkaew

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this study, we evaluated the esthetic perceptions of prosthodontists, general practitioners, and laypeople in elderly smile, using varying the exposure of the maxillary incisors in rest position and a full smile, size of buccal corridor and gingival display of maxillary posterior teeth. The picture of elderly smile was modified and shown with randomized sequence. Participants are asked to rate each image by using a numerical visual analog scale (0-10 scale). A total of 150 participants consisted of 50 Thai prosthodontists, 50 general practitioners, and 50 laypeople. Some pictures exhibited statistically significant differences (p0.05). All variation of incisal display were …

ผลสำเร็จของการรักษาเนื้อเยื่อในแบบคงความมีชีวิตในฟันแท้ที่ผุลึก การทบทวนวรรณกรรมอย่างเป็นระบบ, ฤดีมาศ พัฒนพงศานนท์

Chulalongkorn University Theses and Dissertations (Chula ETD)

บทนำ: การทบทวนวรรณกรรมอย่างเป็นระบบนี้มีวัตถุประสงค์เพื่อหาผลความสำเร็จของการรักษาเนื้อเยื่อในแบบคงความมีชีวิตวิธีการต่างๆ ได้แก่ การปิดทับเนื้อเยื่อในโดยตรง การทำพัลโพโตมีบางส่วนและการทำพัลโพโตมีในฟันแท้ที่ผุทะลุโพรงประสาทฟัน โดยแบ่งตามการวินิจฉัย ได้แก่ Reversible pulpitis และ Irreversible pulpitis วิธีดำเนินการ: ทำการสืบค้นงานวิจัยและการศึกษาผ่านฐานข้อมูลอิเล็กทรอนิกส์และสืบค้นด้วยมือ งานวิจัยที่ตรงตามเกณฑ์คัดเข้าจะถูกคัดเข้ามาทำการวิเคราะห์ข้อมูล การประเมินความเสี่ยงต่อการเกิดอคติ (Risk of bias) ทำโดยใช้แบบประเมิน RoB 2 และ the ROBINS-I tool สำหรับงานวิจัยชนิด RCTs และงานวิจัยชนิด Non-RCTs ตามลำดับ ข้อมูลที่สังเคราะห์จากงานวิจัยที่คัดเข้ามาถูกแบ่งออกเป็น 2 กลุ่ม คือ ฟันที่ได้รับการวินิจฉัยเป็น Reversible pulpitis และ Irreversible pulpitis แต่ละกลุ่มจะทำการคิดอัตราความสำเร็จถ่วงน้ำหนักที่ค่าความเชื่อมั่นที่ 95% ของการรักษาแต่ละวิธี ได้แก่ การปิดทับเนื้อเยื่อในโดยตรง การทำพัลโพโตมีบางส่วนและการทำพัลโพโตมีที่ระยะเวลาการติดตามอาการต่างๆ สำหรับการคิดอัตราความสำเร็จของวัสดุปิดทับเนื้อเยื่อในที่ใช้ในการรักษาจะทำการคำนวณด้วยวิธีการเดียวกันโดยใช้โปรแกรม R-statistics version 4.3.2 ผลการศึกษา: งานวิจัยที่ได้รับการคัดเข้าและนำมาวิเคราะห์ข้อมูลมีทั้งหมด 31 งานวิจัย อัตราความสำเร็จถ่วงน้ำหนักที่ค่าความเชื่อมั่นที่ 95% ของการรักษาแต่ละวิธีของฟันที่ได้รับการวินิจฉัยเป็น Reversible pulpitis มีค่า 78.7 - 93.5% โดยการรักษาด้วยการทำพัลโพโตมีบางส่วนมีอัตราความสำเร็จสูงกว่าการปิดทับเนื้อเยื่อในโดยตรงอย่างมีนัยสำคัญทางสถิติ ส่วนฟันที่ได้รับการวินิจฉัยเป็น Irreversible pulpitis อัตราความสำเร็จถ่วงน้ำหนักของการรักษาแต่ละวิธีมีค่า 79.0 - 90.6% โดยการทำพัลโพโตมีให้อัตราความสำเร็จสูงสุด สำหรับอัตราความสำเร็จถ่วงน้ำหนักของวัสดุปิดทับเนื้อเยื่อในในกลุ่ม Bioceramics ให้อัตราความสำเร็จสูงกว่าวัสดุชนิด Calcium hydroxide อย่างมีนัยสำคัญทางสถิติ สรุปผล: การรักษาเนื้อเยื่อในแบบคงความมีชีวิต ได้แก่ การปิดทับเนื้อเยื่อในโดยตรง การทำพัลโพโตมีบางส่วนและการทำพัลโพโตมีควรพิจารณาใช้รักษาฟันแท้ที่มีชีวิตที่ผุทะลุโพรงประสาทฟัน สำหรับฟันที่ได้รับการวินิจฉัยเป็น Reversible pulpitis การทำพัลโพโตมีบางส่วนมีอัตราความสำเร็จสูงกว่าการปิดทับเนื้อเยื่อในโดยตรงอย่างมีนัยสำคัญทางสถิติ ส่วนฟันที่ได้รับการวินิจฉัยเป็น Irreversible pulpitis การทำพัลโพโตมีมีอัตราความสำเร็จสูงเมื่อเทียบกับวิธีอื่นๆ สำหรับวัสดุปิดทับเนื้อเยื่อในวัสดุชนิด Bioceramics ให้ผลสำเร็จสูงกว่า Calcium hydroxide อย่างมีนัยสำคัญทางสถิติ

Effects Of Jagged1 On Mirna Expression In Dental Stem Cells, Promphakkon Kulthanaamondhita

Chulalongkorn University Theses and Dissertations (Chula ETD)

Notch signaling is activated in dental pulp tissues after direct pulp capping treatment in vivo, implying a role in tertiary dentin formation. Furthermore, Notch signaling also participates in periodontal ligament development and maturation. However, its mechanism of action remains to be elucidated. The present study investigated the expression profile of miRNAs in Notch-activated human dental stem pulp stem cells (DPSCs) and periodontal ligament stem cells (PDLSCs), examined their potential cellular targets and validated the functions of miRNAs in modulating the odonto / osteogenic properties. DPSCs and PDLSCs were treated with indirect immobilized Jagged1. The miRNA expression profile was examined using …

Effect Of Different Beverages On Surface Roughness Of Resin Composite Restorations, Mohamed El-Ghobashy, Rabab Mehesen, Ashraf I. Ali

Mansoura Journal of Dentistry

Objective

To evaluate the effects of different beverages on the surface roughness of different resin composites.

Materials and methods

A total number of 80 discs (5´2 mm dimensions) were made from (Filtek One bulk fill, x-tra fil bulk fill, REVEAL HD, and Filtek Z350XT) and polished. Each group was divided into 4 subgroups, subgroup 1 was immersed in artificial saliva, subgroup 2 was immersed in beer, subgroup 3 was immersed in red bull, and subgroup 4 was immersed in grape juice (n=5). The specimens were immersed in a protocol of 15 min 3 times a day for 30 days. The …

Medication-Related Osteonecrosis Of The Jaws: A Prospective Cross-Sectional Study In A Moroccan Population., Chaimae Mahad, Abdellatif Benider, Ihsane Benyahya

Health Sciences

Introduction: The surgical dentistry department of the CCTD in Casablanca is increasingly receiving cases of medication-related osteonecrosis of the jaws (MRONJ); however, there is a lack of epidemiological data in the department concerning aspects of these conditions. Therefor we proposed to conduct a descriptive cross-sectional study, the main objective of which is to draw up the epidemiological profile of cases of MRONJ in the Oral Surgical department and in the Oncology Department of the Ibn Rochd University Hospital in Casablanca. Methods: A descriptive cross-sectional prevalence study, lasting 2 years, was carried out in the surgical dentistry department of the CCTD …

Chronic Anemia Revealing An Idiopathic Watermelon Stomach: Case Report, Hanane Delsa, Imane Rahmouni, Yassamin Benhayoun Sadafyine, Fatima Belabbes, Anass Nadi, Fedoua Rouibaa

Health Sciences

Watermelon stomach, also known as gastric antral vascular ectasia (GAVE) syndrome, is a rare entity. Patients often present with profound unexplained anemia with or without bleeding externalization. We made the diagnosis during a digestive endoscopy for an etiological assessment of this anemia. Endoscopically, antral erythematous lesions in stripes with a punctate appearance, sometimes hemorrhagic, may suggest a watermelon stomach. The pathophysiology of the watermelon stomach remains complex and unclear. Although several pathologies remain implicated, sometimes, it can be idiopathic. The effectiveness of numerous treatments has been evaluated with relatively satisfactory results. This is a rare case of an idiopathic watermelon …

The Strength Of Motivation For Dental Students, Manal Elhijazi, Ihsane Benyahya

Health Sciences

Context: Motivation plays a key role in academic success. It is a dynamic process that maintains perseverance and tenacity in the face of difficulty. The purpose of our study was to measure and compare the strength of dental students' motivation at the beginning and the end of their training Material and methods: an anonymous self-administered voluntary questionnaire was distributed to 1st and 6th year students at the Faculty of Dentistry in Casablanca This questionnaire consisted of 30 closed questions divided into 3 sections, the first of which provided information on socio-demographic data, the second is devoted to measuring the strength …

Aadej Comm 9 4 2023

AADEJ - The Communicator

The Communicator is the official journal of the American Association of Dental Editors and Journalists (AADEJ). It is published quarterly, distributed digitally via email to members, and posted on the Association's website, AADEJ.org. Each issue includes regular updates from the editorial team and AADEJ board, as well as feature articles on current issues in the field.