Dental Materials Commons^™

Comparison Of Removal Torques Among Different Abutments In Single Implant Crowns After Cyclic Loading: An In Vitro Study, Suppanut Jongsiri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objectives: To evaluate the effect of different restoration designs on the removal torque loss of implant-supported maxillary first premolar crowns after cyclic loading and to measure the impact of cyclic loading on removal torque. Materials and Methods: Thirty-two dental implants (4.0*10 mm), embedded in resin blocks and their abutments, were divided into 4 groups (n=8) based on restoration design: screwmentable group, 2 cement-retained groups: cemented with adhesive resin cement (Panavia V5) or provisional cement (RelyX Temp NE), and screw-retained one-piece titanium group. Monolithic zirconia crowns were fabricated and cemented in the first three groups. Their removal torques were recorded using …

Comparison Of Learning Curve In Novice And Experienced Operators Between Anterior And Posterior Implant Placement Using Dynamic Computer Assisted-Surgical Implant Placement: Randomized Controlled Trials, Pitsinee Kundaechanont

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objectives: To observe the equivalence of learning curve between anterior and posterior implant placement and between novice and experienced operators using dynamic computer assisted-surgical implant placement (CAIS) with type-III bone model simulated maxilla. Materials and Methods: Eight participants, including four novices and four experienced operators, were randomly assigned in blocks to either anterior or posterior placement group. Prior to the experiment, participants underwent video-training. Each participant performed four single implant placements per session with a 7±1 days wash-out period, totaling five attempts. The operating time, coronal, depth, and angle deviations in each attempt were recorded and analyzed by a blind …

The Effect Of Water Sorption And Solubility On Surface Properties Of Cad/Cam Materials, Chatchalanya Wansudon

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objective of this research was to examine sorption, solubility, and surface properties of three widely used CAD/CAM materials: resin composite (Cerasmart; CS), polymer-infiltrated ceramic network (Vita Enamic; VE) and lithium disilicate glass ceramic (IPS e.max CAD; LS). 45 rectangular-shaped specimens were prepared and immersed in deionized water for varying durations. These specimens were then subjected to evaluate their water sorption, solubility, surface roughness, and surface hardness. The results showed that immersion time significantly impacted water sorption of the tested materials (P.05). The 2-way ANCOVA revealed that water immersions had significant effects on surface hardness among tested CAD/CAM blocks (P.05). …

The Effect Of Universal Adhesives On Repairability Of Four Cad/Cam Blocks, Tanyaporn Treyasorasai

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to assess the repairability among four CAD/CAM blocks repaired with different universal adhesives after aging. The CAD/CAM blocks evaluated were polymer infiltrated ceramic network (VE), zirconium-reinforced lithium silicate ceramic (VS), feldspathic ceramic (VM), and lithium disilicate ceramic (IE). Each original block was prepared to create 120 specimens. After 10,000 cycles of thermocycling, surface pretreatment of each specimen was carried out by grinding and etching with a 9% hydrofluoric acid. Subsequently, specimens were divided into three groups: Clearfil™ TRI-S BOND (CUB), Scotchbond Universal Plus® (SUP), and Monobond N® (MN). Resin composite was then applied. All samples underwent another …

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 …

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 …

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 …

Enhanced Human Periodontal Ligament Stem Cell Viability And Osteogenic Differentiation On Two Implant Materials: An Experimental In Vitro Study, Engy Adel Ahmed Farag, Sara Fikry Dr, Shereen N. Raafat

Dentistry

Background: Surface roughness of dental implants impacts the survival of adult periodontal stem cells and rate of differentiation. This research was conducted to test how human periodontal ligament stem cells behaved on yttria stabilized tetragonal zirconia polycrystals and polyetheretherketone (PEEK) discs with different surface topographies.

Methods: Discs roughening was prepared by sandblasting. Stem cells were cultivated on zirconia discs with a polished surface, polyetheretherketone (PEEK) discs with a polished surface, sandblasted zirconia discs and sandblasted polyetheretherketone (PEEK) discs. Cells viability was assessed after 24, 48, 72 hours. Scanning electron microscopy was used to examine the adherence and attachment of cells. …

Effect Of Overlay Material Type And Design On Fracture Resistance Of Mod Cavities In Molars. (In-Vitro Study), Sara Adel Botros, Mohamed Fouad Haridy, Shaimaa Gad

Dentistry

Objective: To evaluate the influence of restoration material type (CAD/CAM lithium disilicate blocks and reinforced composite blocks) and restoration design on fracture resistance of molars with MOD cavities. Methods and Materials: A total of 54 sound human molars were divided into 2 groups (n=9) according to: 1) material type: lithium disilicate CAD/CAM blocks and reinforced composite CAD/CAM blocks; 2) restoration design: overlay with intra-coronal extension or without intra-coronal extension. Additional 18 samples were assigned to positive control group (sound molars, n=9) and negative control group (unrestored MOD cavities, n=9). Standardized MOD cavities were prepared with occlusal width 3 mm, cavity …

Pinch Force Generation During Scaling By Dental Professionals: A Systematic Review, Jessica R. Suedbeck, Emily A. Ludwig

Dental Hygiene Faculty Publications

Objective

The objective of this review was to examine the impact of instrument designs on pinch force generation during scaling by dental professionals.

Methods

Three databases were utilized from September 2019 to November 2021 in addition to hand-searching specific journals and reference lists. Research articles that examined pinch force generation in dental professionals during scaling with manual instruments only were included. Bias was assessed in the individual articles.

Results

Six research articles were included with sample populations that varied from 12 to 24 participants. Four articles evaluated instrument designs in relation to pinch force generation during scaling by dental professionals. …

Dental Hygiene Students' Matching Accuracy When Comparing Antemortem Dental Radiographs And Oral Photographs To Simulated Postmortem Winid3® Odontograms, Brenda T. Bradshaw, Amber W. Hunt, Emily Ludwig, Tara L. Newcomb

Dental Hygiene Faculty Publications

Matching dental antemortem (AM) and postmortem (PM) data for human identification is especially challenging when the workforce is limited. Dental hygienists have served mass fatality incidents (MFIs) due to dental-related expertise. However, forensics within dental hygiene education and research on transferable skills is limited. This qualitative balance design study assessed senior dental hygiene students' match accuracy of simulated cases varying in dental identifiers based on AM full mouth series (FMS) radiographs and oral photographs to PM WinID3® odontograms to demonstrate possible disaster victim identification (DVI) transferable skills gained during formal education. A convenience sample of senior dental hygiene students ( …

Enhancing Dental Aligners With Direct 3d Printing Manufacturing, Erin Clark, Lauren Ickes, Tyler Madison

Williams Honors College, Honors Research Projects

Replacement of thermoforming with direct 3d printed aligners, molding appliances for dental and alveolar movement. Currently the process involved requires 3d printing models and plastic thermoforming, trimming and polishing to fabricate the end product. If possible a product that could be 3d printed that had stress retention, crack resistance, and stain resistance properties delivered in thickness between .030 and .040 inches.

Influence Of The Margin Design On The Fracture Resistance Of Implant Supported Monolithic Zirconia Crowns: An In Vitro Study, Camille Haddad, Ryan Harouny, Karim Corbani, Lara Nasr, Ronn Tassidis

International Arab Journal of Dentistry

Introduction: The purpose of this in vitro study was to test the influence of the margin design of implant supported monolithic zirconia crowns and test if monolithic zirconia crowns with extra fine finish line thickness cemented on zirconia implant abutments can bare the maximum masticatory forces on molars and hence be used in the posterior region.

Methods: Fourteen identical monolithic zirconia crowns cemented on zirconia implant abutments mounted on titanium bases and fixed on implant replicas embedded in PMMA resin were divided into two groups: group I designed with a 0.5 mm CFL (CFL) and group II with …

Bioactivity And Ph Of Nano-White Mta Versus Neomta Plus® And Mta Angelus® As Root Repair Materials: An In Vitro Study, Rana Elkhashab, Abeer Mahran, Mahmoud Mohamed Badr, Ashraf Abu-Seida

International Arab Journal of Dentistry

Objective: This study compared the bioactivity and pH of Nano-white mineral trioxide aggregate (NWMTA), Neo-mineral trioxide aggregate plus (NeoMTA Plus), and Mineral trioxide aggregate angelus (MTA-A) as root repair materials.

Methods: A total of 60 discs made from the three materials (20 discs each) were prepared according to the manufacturer’s instructions. These discs were packed into plastic molds and allowed to set before testing. For bioactivity study, ten discs of each material were immersed in Hanks’ Balanced Salt Solution (HBSS) for 28 days, and analyzed with scanning electron microscope with energy dispersive X-ray (SEM/EDX). Ten discs of each …

Aloe Vera In Dentistry: Current Status And Future Prospects, Ashraf Abu-Seida, Heba Seif

International Arab Journal of Dentistry

This review declares the chemical composition, pharmacological actions, clinical applications, adverse reactions and future prospects of Aloe vera (AV) in the field of dentistry. Literature pertinent to Aloe vera in dental practice was explored in databases like PubMed, Scopus and Google Scholar. The relevant literature was reviewed and critically appraised in this review. Aloe vera is a miracle plant that has been applied as herbal therapy for thousands of years due to its multiple health benefits. In dental practice, AV has different applications and it attracts the attention of researchers due to its natural origin, low cytotoxicity, and various biological …

Rehabilitation Of A Patient With Single Complete Tooth-Supported Overdenture Against The Unmodified Natural Dentition Using Functionally Generated Path Technique: A Case Report, Akanksha Shinde, Nilesh Bulbule, Varun Bhatt, Gayathri Balachandran, Amit Jagtap

International Arab Journal of Dentistry

Meyer’s proposed chew-in technique also called functionally generated path (FGP) technique, is indicated for the restoration of an edentulous arch that is opposed by natural teeth as it does seem to provide the most accurate method of recording occlusal patterns, also help to minimize the effects of negative factors, and to overcome the deficiencies of articulators. As stated by Rudd and Morrow, this technique is especially suitable for tooth-supported complete dentures, due to inherent stability of tooth-supported record bases helps in recording jaw relationships accurately. Whenever a single complete denture is opposed by natural dentition, problems observed are abrasion of …

The Effect Of Bevel On Fracture Resistance Of Gic Restorations In Primary Molars: An In Vitro Study, Audrey Fikani, Lara Nasr, Elie Khoury, Marianne Freiha, Marc Krikor Kaloustian, Feriale Abi Zeid Daou, Melissa Chaaya, Marlene Khoury

International Arab Journal of Dentistry

Introduction: Glass ionomer cements (GICs) are commonly used for restorations in primary molars due to their adhesive, hydrophilic, and bioactive properties. However, their low mechanical resistance may limit their use in proximal cavities. Recent advancements in GICs, such as the high viscosity GIC EQUIA Forte®, have improved their mechanical properties. The effect of a Cavo superficial bevel on the mechanical strength of GIC restorations has been previously studied.

Objectives: To investigate the effect of a Cavo superficial bevel on fracture resistance and the type of fracture (adhesive, cohesive, or catastrophic) in EQUIA Forte® GIC restorations in primary molars. …

The Comparison Of Learning Outcome Of Dental Implant Placement Training In Esthetic Zone Using Dynamic Navigation System Between Novice Dentists And Experience Dentists, Hatsapon Teparrukkul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: The increasing importance of CAIS in the practice of implant dentistry calls for adequate education and training of clinicians, however little evidence is available to support educational strategies and best practice. Purpose: The aim of this study was to investigate the effectiveness of distributed training with d-CAIS in the accuracy of freehand implant placement by inexperienced operators. Materials and Methods: Six senior dental students without experience in implant placement and dynamic CAIS systems​ received simulation in free-hand implant surgery (5 implants), followed by distributed training in dynamic CAIS (6 implants). An assessment followed in freehand implant placement (5 implants). …

Assessment Of The Effects Of Edentulousness On Temporomandibular Components By Using Cone Beam Computed Tomography, Büşra Arıkan, Numan Dedeoğlu, Şuayip Burak Duman

Journal of Dentistry Indonesia

Objective: The aim of this study is to evaluate the effects of edentulousness on the temporomandibular joint using cone beam computed tomography (CBCT). Methods: In this study, CBCT images were evaluated in a total of 48 patients (24 dentulous, 24 edentulous). Ninety-six temporomandibular joint CBCT images were examined. Eminence inclination, condyle head widths and joint space were measured and statistically compared between the edentulous and dentulous groups. Results: The articular eminence inclination value the mediolateral width of the condyle and the anteroposterior width of the condyle were found significantly higher in the dentulous group than in the edentulous group. …