Prosthodontics and Prosthodontology Commons^™

Effect Of Different Surface Treatments On The Shear Bond Strength Between Lithium Disilicate Glass-Ceramic And Resin Cement, Siripan Simasetha

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: The study aimed to evaluate the shear bond strength (SBS) of lithium disilicate glass-ceramic and resin cement using different surface treatments. Methods: Lithium disilicate blocks (Vintage LD Press ®) were prepared, etched with 4.5 % hydrofluoric acid, and randomly divided into seven groups (n=10), depending on the surface treatments: 1) no surface treatment (control), 2) Silane Primer (KS), 3) Signum® Ceramic Bond I (SGI), 4) Signum® Ceramic Bond II (SGI/SGII), 5) experimental silane (EXP), 6) experimental-silane/Signum® Ceramic Bond II (EXP/SGII), and 7) Experimental/Adper™ Scotchbond Multi-purpose Adhesive (EXP/ADP). The specimens were cemented to resin composite blocks with resin cement and …

Effect Of Surface Treatment And Storage Time On Immediate Repair Bond Strength Durability Of Methacrylate- And Ormocer-Based Bulk Fill Resin Composites., Sara Adel Botros

Dentistry

The aim of this study was to evaluate the effect of surface treatment and storage time on immediate repair bond durability of methacrylate- and ormocer-based bulk fill composites. In total, 265 discs were divided into 32 groups (n = 8/group) according to: (1) Material: X-tra fil and Admira Fusion X-tra; (2) Surface treatment: oxygen inhibition; matrix; Futurabond M+; Silane/Futurabond M+; Admira Bond; Silane/Admira Bond; ceramic repair system; and Silane/Cimara bond; and (3) Storage time: 24 h and 6 months. Each disc received three micro-cylinders from the same material. Specimens were subjected to micro-shear bond strength testing either at 24 h …

Radiographic Bone Changes Surrounding Implants Of Different Attachment Systems., Sara Fikry El Shafei Dr, Fardos N Rizk Prof

Dentistry

This study was conducted to compare the effect of GPS attachment, OT Equator attachment and Ball and Socket attachment on crestal bone around implants in implant retained mandibular overdenture cases. Materials and Methods: Following two stage surgical protocol eighteen completely edentulous patients received two implants placed bilaterally in the canine region (36 implants) to retain mandibular overdentures. Inclusion Criteria: Patients were all healthy men, non-smokers, Following Misch rules of bone classification patients with bone density ranging from 850-1250 HU (D2) and bone height and width more than 10 mm and 5 mm respectively. Four months following the surgery patients were …

Comparative Study Of Two Fifferent Telescopic Crown Materials Retaining Lower Partial Overdenture, Fardos N. Rizk Prof., Ayman Hany Amin Dr., Gehan Fikry Prof., Amr Ismail Dr.

Dentistry

Background and Objective: This study was conducted to measure the difference between Chrome Cobalt telescopic crowns and Poly ether ether ketone (PEEK) telescopic crowns retaining implant retained partial overdenture.

Materials and Methods: This is a comparitive study that included fourteen lower kennedy class I partially edendulous patients. All patients received posterior implant in the second molar area in each side. The patients were divided into 2 groups, the first group received chrome cobalt telescopic crown and the second group received poly ether ketone telescopic crowns over the implants. Partial overdenture was constructed for all the patients in the two groups. …

Global Interest For Health Professions Education: A Geographic And Temporal Analyses Through Web Search Differences From 2010-2019, Junhel Dalanon, Yoshizo Matsuka

Internet Journal of Allied Health Sciences and Practice

Purpose: The purpose of this study was to analyze the spatio-temporal differences in web search trends for dental degrees (DD), medical degrees (MD), and nursing degrees (ND) across 197 countries from 2010 to 2019. Method: A search string was used to initiate a search query using Google Trends. The parameters used were DD, MD, and ND as search terms; worldwide as Location; 2010 to 2019 as time range; health education & medical training as category; and web search as database. Data were downloaded and analyzed. Results: Via one-way ANOVA and post hoc Dunnett test, the searches for DD were found …

Comparative Study Of Tensile Bond Strength Between Resin Cements And Hybrid Materials, Chakriya Donpinprai

Chulalongkorn University Theses and Dissertations (Chula ETD)

Purpose: To compare tensile bond strength among the hybrid materials (VITA ENAMIC®, SHOFU Block HC, Katana AVENCIA and Experimental material) using two primers (Universal ceramic primer and RelyX ceramic primer) and two resin cements (Super-Bond C&B and RelyXTM U200). Methods: Twenty blocks of 4×4×1 mm3 were prepared from each material type. In VITA ENAMIC® group, specimens were conditioned with 5% Hydrofluoric acid and primer. In SHOFU Block HC and Katana AVENCIA groups, specimens were treated with 50µm alumina and primer. In experimental material, specimens were etched with 65% Phosphoric acid. Ten specimens were randomly assigned to each group for different …

Gene Expression And Immunohistochemistry Analysis Of Xenograft And Allograft In Maxillary Sinus Floor Augmentation, Isaya Kungvarnchaikul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Quality of bone is an important factor contributing to the success of dental implants. The bone height in maxillary posterior area sometimes is not enough and might pose risks for placing dental implants. Maxillary sinus augmentation with bone substitutes is used for filling and correcting bony defects. This study aims to determine the differences in gene expressions of TNF-alpha, RUNX2, COL1A1, ALP between xenograft (Bio-Oss®) and allograft (SureOss®). Patients who needed two-stage maxillary sinus floor augmentation were included (n=13). Patient who had dental implant at posterior maxilla without bone substitutes was also used in immunohistochemistry analysis (IHC) (n=1). Bone samples …

Effect Of Deep Margin Elevation With Resin Composite And Resin-Modified Glass Ionomer On Marginal Sealing Of Cad/Cam Ceramic Inlays: An In Vitro Study, Jaraswan Vichitgomen

Chulalongkorn University Theses and Dissertations (Chula ETD)

Purpose. To evaluate the marginal sealing ability of different restorative materials used in deep margin elevation (DME) on zirconia-reinforced lithium silicate CAD/CAM ceramic restoration. Methods. A total of 30 Class II cavities were prepared in freshly extracted human molars with the proximal gingival margin located 1 mm below the cemento-enamel junction (CEJ). All specimens were randomly assigned to one of three groups (n=10): control group, resin composite group (FiltekTM Z350 XT), and resin-modified glass ionomer group (VitremerTM Tricure). In group 1, control group, no DME was performed. The inlay margin of the control group was placed directly onto dentin. In …

The Effect Of Laser Power On Mechanical And Physical Properties Of Ti-6al-4v Eli Fabricated By Selective Laser Melting, Pajaree Termrungruanglert

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to examine the differences in mechanical and physical properties of Ti-6Al-4V extra low interstitial (ELI) fabricated by selective laser melting (SLM) between different laser power. The Ti-6Al-4V ELI alloy samples were printed in dumbbell shape by SLM machine (Trumpf/TruPrint 1000, Germany) with 3 laser powers (75, 100 and 125 W), 8 samples for each group. And the other parameters (spot size 30 µm, scanning speed 600 mm/s, layer thickness 30 µm) were kept constantly. All samples were performed under tensile test with universal testing machine. Moreover, The microhardness test was performed. All data were statistically analyzed with …

Influence Of Demineralized Dentin On Marginal Seal Using Primerless Wet Bonding Technique: In-Vivo Study, Thanyarat Lerttriphob

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purpose of this study was to compare microleakage distance between Class V restorations and tooth interface when using either 4-META-MMA/TBB or MMA/TBB resin adhesives by using 1 % ferric chloride in 1% citric acid (1-1) for conditioning periods of 10s (1-1-10s) 30s (1-1-30s) and 60s (1-1-60s) for in-vivo study. Material and methods: A total of 60 Class V box cavities were divided into 6 groups of 10 specimens (n= 10) on the caries-free, vital, and hopeless periodontally-compromised teeth, scheduled for extraction. A Class V cavity (3mm × 3mm × 1.5mm) was prepared on the buccal or lingual surface located …

Effect Of Ultrasonic Treatment On The Transverse Strength Of Relined Denture Base With Autopolymerizing Acrylic Hard Reline Material, Tithiporn Arunwichit

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study evaluated the effect of ultrasonic treatment and surface treatments on transverse strength of denture bases which relined with auto-polymerizing acrylic resin. The study groups, ninety heat-polymerized acrylic resins (64×10×2 mm) were divided by three surface treatments: no surface treatment (N), applied MMA for 180 seconds (MM), applied MF-MA for 15 seconds (MF). They were relined with auto-polymerized acrylic resin to create 64×10×3.3 mm specimens. Then, they were divided further by ultrasonic which were no ultrasonic (X), ultrasonic in water (W), ultrasonic in 30% ethanol (E). As a result, all test groups were classified as NX, NW, NE, MMX, …

Exploring The Use Of Pulsed Erbium Lasers To Retrieve A Zirconia Crown From A Zirconia Implant Abutment, Ahmed Elkharashi

Theses and Dissertations

Removal of zirconia crowns, commonly used as cement-retained implant fixed restorations, can be challenging. Conventional methods of crown removal are time consuming and often leave irreparable damage to the crown, which can be costly to patients and practitioners. This research explored the use of two different types of pulsed erbium lasers, erbium-doped yttrium aluminum garnet laser (Er:YAG) and erbium, chromium-doped yttrium, scandium, gallium and garnet (Er,Cr:YSGG), as non-invasive tools to retrieve cemented zirconia crowns from zirconia implant abutments. Times needed to remove the crowns were recorded and analyzed using ANOVA (��=0.05). No statistical differences between the debond times of each …

Three Dimensional Biometric Guide In Determining Maxillary Tooth Position And Arch Form, Tawfiq Omar Farouq

Student Works (2020-2029)

In complete denture fabrication, when pre-extraction records are lacking, determining the denture teeth positions to where the natural predecessors occupied is essential yet challenging. Although several biometric guides were suggested to position teeth for dentures, none is providing three-dimensional (3D) positions of teeth that can be used in the recently developed computer designed digital dentures. The aim of this study was to develop new biometric guides to determine the original 3D positions of the maxillary teeth and dental arch form individualised for each given dentate or edentulous maxillary cast based on selected intraoral landmarks. The objectives were to investigate the …

Accuracy Of Blx And Blt Guided Implants In The Edentulous Maxilla: An In Vivo Study, Benjamin Andrew Kordusky

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objectives: To determine the accuracy of dental implants placed using a dual scan CBCT protocol with a SLA 3D printed mucosa supported surgical guide using a flapless surgical approach with regard to sleeve position, type of implant, and regional location in the maxillary arch.

Methods: Nine patients received 4 dental implants utilizing a fully guided, flapless approach with a mucosa supported SLA surgical guide with 3 fixation pins. Implants were immediately loaded using an attachment placed in an existing Maxillary complete denture. Accuracy of implant positions were evaluated by the Treatment Evaluation module of coDiagnostiX (DentalWings, Montreal, Canada). Statistical analysis …

The Visual And Spectrophotometric Effect Of External Bleaching On Omnichroma Resin Composite And Natural Teeth, Michael Brian Evans

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objective: To determine the visual and spectrophotometric effect external tooth bleaching has on natural tooth structure and OMNiCHROMA composite at various number of treatments. Variables were compared to determine if there is a detectable difference between the composite and the tooth before and after bleaching.

Methods: Preparation and restoration of 25 previously extracted teeth was completed. OMNiCHROMA composite was used. Each tooth was measured visually with a VITA shade guide and a colorimeter. Measurements were recorded before bleaching, after 5 and 10 treatments. Statistical analysis was completed and ΔE values between the composite and tooth were compared between the 3 …

Reliability Assessment Of The Examination Of The Sounds In The Temporo­ Mandibular Joints In A Polish Patient Population, Magdalena Osiewicz, Jolanta E Loster, A Wieczorek, Bartłomiej W Loster

Journal of Dentistry Indonesia

Temporomandibular joints (TMJs) sounds are a common phenomenon in individuals with and without temporomandibular disorders (TMD). According to the Research Diagnostic Criteria of Temporomandibular Disorders (RDC/TMD), there are the following two distinguished types of sound: click and crepitation. The implementation of diagnostic criteria in studies should be accompanied by a reliability assessment of these criteria. Objective: This study aimed to assess the intra- and inter-observer reliability of joint sounds examination, using the officially translated and culturally adapted Polish version of the RDC/TMD. Methods: Ninety-eight (n = 98) consecutive adult patients were examined during two clinical sessions by two independent examiners, …

Part I: Comparative Analysis Between Natural And Ceramic Teeth, Aneeza Hussain, Ibeth Erazo

Publications and Research

Ceramics play a fundamental role in Dentistry and are used widely, due to their ability to mimic the optical characteristics of enamel and dentine, as well as for their biocompatibility and strength. Initially, dental ceramics were materials that formed part of systems, designed with the purpose of producing dental prosthetics that in turn were used to replace missing or damaged dental structures. However, due to the increased demand for esthetics, its development has gone beyond in such a way that it has led to the development of all ceramic restorations. So that, in the last few decades, there have been …

A Prospective Clinical Study On Implant Impression Accuracy, Motaz Osman, Hassan Ziada, Ahmed Suliman, Neamat Hassan Abubakr

Dental Medicine Faculty Research

Background An accurate impression is crucial to the long-term success of dental implants. This investigation evaluated the accuracy of the open and closed implant impression techniques in partially edentulous patients who received two adjacent implants. Material and methods Forty patients received Osstem Implants (Osstem Implant System, Seoul, Korea). Two impressions were made for each patient, one using an open tray and a second with a closed tray technique. The horizontal distances between two impression copings were measured and compared to similar measurements on the master casts. Also, under a stereomicroscope (AmScop14370, Myford Road, #150, Irvine, CA 92606 USA) at a …

Pink Tooth Of Mummery In The Maxillary Left Canine After Fixed Partial Denture (Fpd) Preparation, Eger V. Korolevsky, Takashi Komabayashi, Denise Foran

Dental Medicine Faculty Publications

Pink tooth of Mummery is typically found after trauma. However, this case report describes an unusual occurrence of pink tooth in a 67-year-old Caucasian male after fixed partial denture (FPD) tooth preparation. Pink tooth in this case may be due to one or more factors: tooth reduction and heat generation during tooth preparation; heat generation during polymerization of provisional material; and hyperocclusion of a provisional FPD. This case highlights the importance of choosing the appropriate materials and techniques to avoid pulpal complications after dental prosthesis work.

In-Vitro Comparison Of Retention Among Contemporary And Conventional Post-And- Cores, Hatem Alqarni

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: Computer-aided design/computer-aided manufacturing (CAD/CAM) technology is gaining popularity in dentistry, and more recently, used to fabricate custom post-andcores (PC) for endodontically treated teeth. The purpose of this study was 1) to evaluate the overall retention of conventional cast gold post-and-cores compared to CAD/CAM fabricated printed, milled titanium post-and-core and milled zirconia post-and-cores based on load, time of dislodgement and 2) to evaluate the mode of failure of the post-and-cores.

Materials and Methods: A maxillary central incisor was selected. Root canal treatment was performed, and acrylic resin pattern was used to fabricate post-and-core. A total of 80 post-and-cores (20 …