Dental Materials Commons^™

Adding Ferrous Sulphate To Hydrogen Peroxide Tooth Bleaching Gels Reduced The Required Bleaching Time, Thunnithie Thitichoatariyakun

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective To investigate the effect of adding ferrous sulphate (FeSO4) as a chemical activator to hydrogen peroxide tooth bleaching gels on color change and treatment time. Methods One hundred and twenty extracted human upper premolars, hue A or B, were selected. One enamel-dentin specimen was prepared from each tooth. The specimens were divided into twelve groups (n=10), based on bleaching product, FeSO4 and treatment time. Three in-office bleaching products were used in this study: Opalescence® Boost TM, PolaOffice® and ZOOM!® Whitespeed TM. Each product was used per its specific protocol: 1: untreated control (C), 2: FeSO4 added, using the product's …

National Children's Dental Health Month Activity Book (2017), American Dental Association Foundation

National Children's Dental Health Month

No abstract provided.

Evaluation Of Push Out Bond Strength Of Glass Fiber Post Related With Ultrasonic Irrigation, Nomjit Vidhyaphum

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective This study compared the bond strength of glass fiber post to dentin using different irrigation methods and solutions and to evaluate the bond strength in different regions of the root. Methods One hundred human anterior maxillary teeth were randomly divided into 10 groups (n=10). Root canal filling and post space preparation were carried out followed by diverse final irrigation techniques. Groups 1 to 3 underwent syringe irrigation, groups 4 to 6 irrigation with ultrasonic instrumentation and groups 7 to 9 passive ultrasonic irrigation. Different irrigant solutions were used in each groups as 2.5% NaOCl (groups 1,4,7), 17% EDTA (groups …

Microleakage Of Enamel Preservation At Gingival Wall Of Class Ii Resin Composite Restorations (Nanofilled Vs Bulk-Fill), Onladda Pisuttiwong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objectives. This in vitro study tested the hypothesis that preserving a thin enamel layer at the gingival margin and using bulk-fill resin composites could minimize microleakage of class II resin composite. Materials and Methods. Thirty-six human third molars were randomly divided into three groups of 12 specimens each: Filtek Bulk Fill Posterior Restorative in Capsules (BFC), Filtek Bulk Fill Posterior Restorative in Syringes (BFS) and Filtek Z350 XT (Z350). Teeth were prepared on two sides for a class II cavity (3 mm buccolingually x 2 mm mesiodistally at occlusal and 1.5 mm at coronal x 4 mm of axial depth) …

Effect Of Remineralization On Color Change Of Bleached Tooth, Panita Suttisakpakdee

Chulalongkorn University Theses and Dissertations (Chula ETD)

The aim of this in vitro study was to investigate the effect of remineralization and time on the color and microhardness change of teeth bleached using 10% carbamide peroxide (10%CP) or 40% hydrogen peroxide (40%HP). Seventy-two 6x6x2 mm3 enamel slabs were prepared from human premolars. The specimens' color and Vickers' microhardness were recorded at baseline (T0). The specimens were divided into six groups, two groups were treated with 10%CP with or without casein phosphopeptides and amorphous calcium phosphate (CPP-ACP) (10%CP and 10% CP/CPP-ACP, respectively), two groups were treated with 40% HP with or without CPP-ACP (40%HP and 40%HP/CPP-ACP, respectively), one …

The Overall Esthetic Assessment Of Anterior Single-Tooth Implant Restoration: Modified Objective Criteria, Pongsakorn Komutpol

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objectives: The aim of this study was to observe the correlation of esthetic outcomes of single-tooth implant restoration when using Pink Esthetic Score/White Esthetic Score and the new modified assessment (Modified Objective Criteria; MOC) Materials and Methods: This crossectional retrospective study, up to 5 years, recruited 26 patients who single implant in maxillary central incisor area was placed. All the implants were recalled. Demographic data, intraoral photograph, dental model, periapical radiograph and CBCT were taken. One examiner assessed the esthetic outcomes by using PES/WES and MOC (gingiva, prosthesis and bone foundation) with 2 weeks between each evaluation. The score of …

A Comparison Of Taper-Implant Designs And Bone Quality On The Primary Stability: An In Vitro Biomechanical Study, Ratchaya Chayangsu

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective To investigate the effect of the taper-implant design and the effect of bone quality on the primary stability in terms of insertion torque test, removal torque test and resonance frequency analysis. Methods Five taper-implant designs were test in artificial bone blocks with four qualities. Five repetitions per implant design were placed in each bone quality started from softest bone block. The implant motor was used to prepared the osteotomy sites and implant insertion according to manufacturers' recommendation. Peak insertion torque values were measured and recorded by implant motor when the platform of the implant flush to the bone level. …

The Longevity Of Ceramic Veneers: Clinical Evaluation Of Mechanical, Biological, And Esthetic Performances Of Ceramic Veneers Up To 7-Years Retrospective Study, Rapeepan Monaraks

Chulalongkorn University Theses and Dissertations (Chula ETD)

Purpose: To evaluate the longevity and mechanical, biological and aesthetic performance of ceramic veneers placed after 5 to 7 years in service. Materials and Methods: Ceramic veneer restorations were clinically examined following modified from the United States Public Health Service (USPHS) and World Dental Federation (FDI) criteria. Clinical evaluation was performed by two clinicians regarding mechanical, biological and aesthetic performances during maintenance appointments between September 2016 and August 2017. Intra-examiner and inter-examiner reliability were evaluated by calculating the intraclass correlation coefficient and inter-examiner calibration. The results were analysed by Kaplan-Meier survival estimation method and log-rank test at a 95% confidence …

Host Responses In Peri Implant Tissue In Comparison To Periodontal Tissue, Raviporn Madarasmi

Chulalongkorn University Theses and Dissertations (Chula ETD)

The host response in peri-implant tissue may differ from that in periodontal tissue in a healthy individual. The purpose of this study is to investigate the expression of inflammatory cytokines in peri-implant crevicular fluid (PICF)from single implant with two different abutment types in comparison to healthy periodontal tissue. Moreover, the effect of these inflammatory cytokines on the expression of FAK and RANKL were also studied. Nineteen participants with healthy implants and teeth were recruited according to the inclusion and exclusion criteria. PICF and gingival crevicular fluid (GCF) was collected using sterile paper points. The expression level of inflammatory cytokines including …

Evaluation Of Voids In Class Ii Restorations Restored With Bulk-Fill And Conventional Nanohybrid Resin Composite, Saiisara Chaidarun

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objectives: The aim of the study was to evaluate the influence of four resin composites on voids in small and large Class II cavities. Furthermore, the thickness of the first increment of the restorations was studied. Methods: Eighty artificial lower second premolars were divided into two preparation designs with 40 standardized Class II cavities in each, and then restored with four resin composites (three bulk-fill types: SonicFill 2, Filtek Bulk Fill (capsule), Filtek Bulk Fill (syringe) and a conventional nanohybrid resin composite: Premise). Restorations were sectioned for microscopic evaluation and a Kruskal-Wallis analysis was performed to evaluate the number of …

Immunohistochemical Assessment Of The Peri-Implant Soft Tissues Around Different Abutment Materials : An Experimental Study In Human, Sirikarn Thongmeearkom

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective To evaluate the effect of 4 different types of abutment material, which are titanium, zirconium oxide, gold alloy, and zirconia-coping cemented on titanium-base, on the surrounding soft tissues. Material and Methods Twenty dental implants in posterior edentulous area were randomly divided into 4 groups and inserted 4 types of abutment materials; Titanium, zirconia, gold-alloy, and titanium-base, on the implant installation surgery day. Eight weeks after implant surgery, peri-implant soft tissues around experimental abutments were harvested and split according to implant side; buccal, lingual, mesial, and distal. The specimens were processed through immunohistochemical preparation and stained with CD3, CD20, CD68, …

An Investigation Of Surface Characteristics Of Enamel Treated With Infiltrative Resin: A Scanning Electron Microscopy Study, Danielle E. Easterly

Theses and Dissertations

AN INVESTIGATION OF SURFACE CHARACTERISTICS OF ENAMEL TREATED WITH INFILTRATIVE RESIN: A SCANNING ELECTRON MICROSCOPY STUDY

Danielle E. Easterly, Doctorate of Dental Surgery.

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University.

Virginia Commonwealth University. 2017.

Director: Dr. Eser Tüfekçi

D.D.S., M.S., Ph.D., M.S.H.A.

Objective: To evaluate the microstructural changes of a resin infiltrant (ICON®, DMG America LLC, Englewood, NJ) after six months of simulated toothbrushing.

Materials and Methods: Ten extracted third molars (n=10) were collected. Artificial white spot lesions were created and resin applied. Environmental SEM …

A Study Of The Relationship Between Job Related Stress And Temporomandibular Disorders In Accountants Working In Jakarta, Cindy Maura Saputra, Laura Susanti Himawan, Ira Tanti

Journal of Dentistry Indonesia

Stress is a known risk factor for Temporomandibular Disorders (TMD), however there are few studies of TMD in people who work in high stress jobs. Accounting is a profession known for its high levels of stress and expectation. Objective: The aim of this study is to investigate the relationship between the intensity and frequency of job related stress and the occurrence of TMD in accountants in Jakarta. Methods: A cross-sectional study, with ethics approval from the Ethical Committee of the Faculty of Dentistry, University Indonesia, was performed on 116 accountants aged 21 to 50, living in Jakarta. Subjects were asked …

Effects Of Flash-Free Technique On Plaque Retention, White Spot Lesions, And Bracket Failure: A Randomized Clinical Trial, Payam Ishani Afousi

Theses & Dissertations

A side effect of orthodontic treatment is the development of white spot lesions (WSLs). This thesis attempted to evaluate the effects of the use of APC™ Flash-Free (FF) and conventional adhesives in bonding of orthodontic brackets on plaque formation and retention, WSL development, and bracket failure in-vivo. This was accomplished by collecting plaque samples from around orthodontic appliances and analyzing them using ATP-driven bioluminescence; scanning enamel surfaces using the Canary System™ to evaluate WSL development, and counting the number of spontaneous debonding of brackets of the 4 maxillary incisors in the first 6 months of treatment. It was found …

Color Change Of Commercial Resin Composited With Different Photoinitiators, Feng Gao

Master's Theses (2009 -)

Camphorquinone (CQ) is the most commonly used photoinitiator in light-cured dental resin composites. However CQ is associated with a yellowing effect, which has led manufacturers to add alternative initiators into resin composites to reduce the amount of CQ used. The color change upon polymerization by light and aging in artificial saliva and room air of 8 commercial traditional or bulk-fill resin composites with or without additional photoinitiator(s) beside CQ was studied. The three traditional resin composites with CQ and additional photoinitiator(s) tested were Tetric EvoCeram (Ivoclar Vivadent), AELITE LS Posterior (Bisco), and Vit-l-escence (Ultradent). The two bulk-fill resin composites with …

Correlation Of Tooth Length Measurements Made On Cbct And 3t Mr Images, Andrew Scott Taylor

Loma Linda University Electronic Theses, Dissertations & Projects

Objective. This study compared tooth length measurements made on cone beam computed tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration were performed on 12 subjects. The alginate bite registration was used to provide a proton-rich material to surround proton-poor teeth in an attempt to improve visualization of teeth. DICOM formatted images from each of the three scans for each subject were oriented in all …

Flexural Strength Of Nano-Hybrid Resin Composite As A Function Of Light Attenuation Distance And Specimen Dimension, Farid Sabry El-Askary Pro. Dr., Sara Adel Botros Dr., Mohamed Salah Abdelaziz Nassif Pro. Dr., Mutlu Özcan Prof. Dr.

Dentistry

This study evaluated ascending order of light attenuation distance (0, 2, 4, 8 mm) and specimen dimensions (2 × 2 × 10, 2 × 2 × 12, 2 × 2 × 15 mm3) differing from requirements of ISO 4049 (2 × 2 × 25 mm3) on the flexural strength of nano-hybrid resin composite. Specimens (N = 160) were prepared accordingly and randomly assigned into groups for the factors studied. Specimens were photo-polymerized from increased distances through 1, 2, 3 and 5 overlapping cycles depending on the specimen length after which they were subjected to three-point bending test (0.5 mm/min). …

Get In The Zone: A Survey Of Dental Professionals' Knowledge Of Ozone Therapy, Emily Hannah

Mahurin Honors College Capstone Experience/Thesis Projects

Ozone therapy has been used in medicine for many years to treat a variety of ailments. Ozone is an unstable triatomic molecule made up of three oxygen atoms. This molecule has the ability to kill bacteria, fungi, parasites, and viruses. The researcher first was curious if there has been research done on uses of Ozone Therapy in the dental setting. After reviewing the literature there is indeed a use for Ozone Therapy to treat a host of dental problems including periodontal disease, ulcers, and carious lesions (also known as cavities). However, there are conflicting conclusions in the literature as to …

Mechanical Properties Of Copper-Nickel-Titanium Archwires, Margaret Amelia Rosen

Master's Theses (2009 -)

Introduction: The initial phase of orthodontic therapy relies on flexible wires, usually composed of a nickel-titanium alloy, to apply a substantially constant load during tooth movement. Copper has been added to nickel-titanium archwires, resulting in an alloy with potential clinical advantages such as a lower stress hysteresis. Many orthodontic companies claim that their copper-nickel-titanium manufacturing process allows for the production of more consistent transition temperatures in the wires, allowing the orthodontist to customize treatment to various patients based on the force level needed. There are currently many manufacturers of these wires, creating a wide range of copper-nickel-titanium archwires from which …

Thermal Properties Of Copper Nickel-Titanium Orthodontic Archwires, Joshua Gilbert

Master's Theses (2009 -)

Introduction: Copper Nickel-Titanium (CuNiTi) is a relatively new composition of Nickel-Titanium (NiTi) archwires that was originally patented in 1991 as part of the Ormco line of wires. The patent has now recently expired and many other orthodontic companies are making their own CuNiTi wires. Advertisement claims have focused on the laboratory benefits of adding Copper (Cu) to the NiTi, however few independent laboratory testings have been conducted on these new wires to verify claims. The purpose of this study was to conduct thermal analysis of CuNiTi for all currently available wires in two Austenite Finish (Af) variants and two commonly …