Dental Materials Commons^™

An In Vitro Evaluation Of Surface Roughness, Color Stability And Bacterial Accumulation Of Lithium Disilicate Ceramic After Prophylactic Periodontal Treatment, Fatma Makkeyah, Tarek Salah Morsi, Marwa Mohamed Wahsh, Amr Saleh El-Etreby

Dentistry

Objective: To evaluate the effect of scaling procedures using different ultrasonic tips on the surface roughness, color stability and bacterial accumulation of lithium disilicate ceramic. Material and Methods: Scaling procedure was carried out using ultrasonic scaler (Satalec, Acteon, North America) with stainless-steel tip (US), titanium tip (UT) and plastic tip (UP), on disc shaped lithium disilicate samples cemented into a cavity prepared onto the labial surface of freshly extracted bovine teeth (10 samples per group). The samples were stored in coffee solution in an incubator at 37°C for 12 days, which is equivalent to 1 year of coffee consumption. The …

Pre-Heating Of Dual-Polymerized Resin Core Foundation System: Effect On Micro-Shear Bond Strength, Degree Of Conversion And Ultimate Tensile Strength, Sara Adel Botros

Dentistry

This study evaluated the effect of pre-heating a dual-polymerized adhesive and a dual-polymerized core build-up resin composite on their dentin micro-shear bond strength (mSBS), degree of conversion (DC%) and ultimate tensile strength (UTS). For mSBS, 45 human molars were divided into 9 groups (n ¼ 5) according to two factors: (1) Adhesive temperature (25 C/32 C/40 C) and 2- Resin composite temperature (25 C/32 C/40 C). Dual-polymerized adhesive (Futurabond U/FBU) was applied over occlusal dentin at each temperature following the manufacturer’s instructions. Four dual-polymerized composites (Rebilda DC/RDC, VOCO) micro-cylinders (1.2 mm diameter 1 mm height) were built-up over each dentin …

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 …

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 …

A Comparison Of Implant Stability Between Two Dental Implant Designusing Two Different Stability Measuring Technique, Chanikarn Chaksupa

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective To investigate the primary stability of aggressive thread design implant comparing to nonaggressive thread design implant and to evaluate the correlation between ISQ values and IST values. Materials and methods 96 implants were used in this study. 48 BLT Straumann® and 48 BLX Straumann® were used. All implants were digitally planned and placed in 3D printed model using computer assisted guided surgery. The edentulous area at models were packed with randomized pattern of four different kinds of polyurethane blocks to replicate mixed cancellous bone. Postoperative implant stability measurement was performed immediately after implant insertion. Implant stability was measured by …

The Relative Occlusal Force Of Natural Tooth Adjacent To Distal Extension Implant Support Fixed Prosthesis Using T-Scan Analysis : A Cross Sectional Study, Chin Purintarapiban

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: This cross-sectional study aimed to compare the relative occlusal force between implant in the distal end and tooth adjacent to implant in maximum intercuspation. Methodology: Patients with implant restoration replacing teeth in free end space adjacent to natural tooth were recalled. The occlusion is examined as shim stock passes through the occluded tooth in heavy or light bites. The heavy bite or a light bite with shim stock that cannot pull through is HB1 or LB1. If the shim stock can pull through it is considered HB0 or LB0. The implant is classified into 3 groups, HB1LB0, HB1LB1, and …

Accuracy Comparison Of Dental Implants Obtained By Dynamic Cais In All-On-4 Edentulous Area Among Different Types Of Bone Density: An In Vitro Study, Jutasinee Pornpolsarun

Chulalongkorn University Theses and Dissertations (Chula ETD)

Background: Determination of available bone is particularly important in implant placement quality of bone can affect the accuracy implant placement. Currently, Dynamic navigation system illustrated the improvement of implant accuracy, The accuracy of implant placement using computer-assisted implant placement system (CAIS) is unknown. As a result, the goal of this study was to see how bone density affected implant placement accuracy with Dynamic CAIS. Purpose: To determine the effect of different bone density in the accuracy of implant placement using dynamic navigation system Materials and Methods: The study's overall design includes a single doctor planning each implant using a CBCT …

A Comparison Of Implant Stability Between Two Implant Systems Using Guided Surgery In Inexperienced Surgeons, Pinmuk Supachaiyakit

Chulalongkorn University Theses and Dissertations (Chula ETD)

Aim: To investigate the implant stability in relation to two different implant designs, a cylindrical shaped single threaded design (CS/ST) and a tapered shaped double threaded design (TS/DT) using RFA over the first 8 weeks. Materials and Methods: 28 implants were randomly allocated into two groups and were placed as single tooth implant in the posterior arch. CBCT scan was used to determine the bone density and the implants were placed with guided surgical template by inexperienced surgeons which were prepared with the same implant planning software. The implant stability was measured using the RFA over the first 8 weeks …

Clinical Accuracy Between Planned And Placed Posterior Implant Position Of Two Static Implant Planning Software Programs In Inexperienced Operators, Wanwanat Singthong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: This study aimed to evaluate and examine the difference in posterior implant positioning between the planned and placed positions when inexperienced operators used two static implant planning software packages following a fully guided implant surgery protocol in the clinical field. Materials and methods: Twenty-four patients who needed single posterior implant placement were randomly divided into two groups based on the used implant planning software (group 1, coDiagnostiX, n=12; group 2, Implant Studio, n=12). The dataset of the placed implant position, generated from digitizing the implant impression, was superimposed on the planned implant position. The number of horizontal, angular, and …

Influence Of Training Schedule On Learning Outcome Of Motor Skills For Dynamic Navigation System In Esthetic Zone, Wirawat Kunakornsawat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Backgroud: Currently, a novel dynamic navigation system has been demonstrated to improve the accuracy of 3D implant placement, but proficiency in this system is quite difficult to achieve. Thus, the training course for using this system is required. The distributed training has been shown to be superior to massed training, it is still uncertain whether differences in distributed training rest periods will result in the best motor skill acquisition for dynamic navigation system. Purpose: The objective of this study was to determine the most effective schedule for training motor skill needed to perform implant placement using dynamic navigation system: distributed …

Comparison Of Esthetic Perception Of Maxillary Central And Lateral Incisors Between Dentists And Laypersons, Pastharee Jarusripat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Objective: To compare esthetic perception between dentists and laypersons by difference of asymmetrical width and length of maxillary central and lateral incisors under 5 and 15 seconds evaluation time. Materials and Methods: Photos of women were digitally altered by Adobe Photoshop® program to create image with symmetrical and asymmetrical tooth width or length in 0.5 mm increments. Final images were randomly present on computer screen using an equal ratio to actual tooth. Thirty-six dentists and 36 laypersons were asked to rate attractiveness of those smiles on a numerical rating scale within 5 and 15 seconds of evaluation time. Mann-Whitney U …

Trimming And Ph Effects On Nickel Ion Release From Stainless Steel Crowns Of Primary Teeth, Milad Arab-Nozari, Mohammad Shokrzadeh, Nastaran Zamehran, Jamshid Yazdani Charati, Azam Nahvi

Journal of Dentistry Indonesia

Objective: Stainless steel crowns (SSCs) are preformed metal crowns used to restore severely decayed primary teeth. The aim of this study is to evaluate the effects of pH changes and SSC margin trimming on nickel release in artificial saliva solution. Methods: A total of 90 SSCs were divided into three groups and placed in 35 ml of artificial saliva of pH 6.8, 5, and 3.5. Another group consisting 30 SSCs with trimmed margins was placed in saliva of pH 6.8. All SSCs were incubated at 37°C. The concentration of released nickel was assessed on days 1, 7, 14, 21, and …

Evaluation Of Maxillary Impacted Teeth And Their Relationship With Adjacent Teeth And Anatomic Structures With Cone Beam Computed Tomography, Emre Köse, Emin Murat Canger

Journal of Dentistry Indonesia

Objective: This study aimed to examine the cone beam computed tomography (CBCT) images of impacted maxillary canines and mesiodentes. Methods: This retrospective radiographic study was performed on 177 patients with 200 impacted maxillary canines and 12 mesiodentes. Using CBCT images, the unilateral/bilateral occurrence, presence of root dilaceration, mesio-distal and buccopalatal location, impaction condition, contact region of adjacent teeth, presence and degree of root resorption of adjacent teeth, dental follicle width, closest distance to the nasal cavity, nasopalatinal canal, and maxillary sinus were assessed. For mesiodentes, the types, follicle width, direction, and relationship with anatomical structures were evaluated. Results: No statistical …

Comparative Evaluation Of Apical Extrusion Debris And Irrigant During Calcium Hydroxide Removal And Endodontic Instrumentation Using Three Types Of Instrumentation Systems, Selen İnce Yusufoğlu, Esma Saricam

Journal of Dentistry Indonesia

Many root canal preparation techniques and instruments produce apically extruded materials to a certain extent depending on the preparation system adopted. The extrusion of debris from the apical foramen during chemomechanical preparation may cause postoperative pain and failure of endodontic treatment. Objective: This study evaluates the differences in the apical extrusion of debris and calcium hydroxide (CH) during endodontic instrumentation by using Reciproc Blue (RB), WaveOne Gold (WOG), and F6 Skytaper (F6). Methods: Six experimental study groups (n = 13) were established. The root canal procedures for all groups were prepared with different methods: Group I: One Shape (OS) instrumentation, …

Comparison Of Medicaments Used In Regenerative Endodontics In Terms Of Dentin Microhardness And Adhesion Of Mineral Trioxide Aggregate, Esma Saricam, Neslihan Bulak, Esra Özyurt, Suat Özcan

Journal of Dentistry Indonesia

Eliminating microorganisms in the root canal system is important for the success of regenerative endodontics. Objective: This study evaluated the effects of different antibiotic pastes used for regenerative endodontic procedures on dentin microhardness and the push-out bond strength of mineral trioxide aggregate (MTA) to root canal dentin. Methods: Sixty-four maxillary central incisors were instrumented and randomly divided into the following four groups (n = 16) for medicament treatment: triple antibiotic paste, amoxicillin+clavulanic acid, cefaclor, and control (no dressing). After 21 days, two root segments were obtained by sectioning the roots horizontally for push-out and microhardness evaluations. MTA was placed into …

Reliability Of Panoramic Radiography For Vertical Facial Pattern Assessment, Waqar Jeelani, Maheen Ahmed, Shakeel Ahmed

Journal of Dentistry Indonesia

The orthopantomogram (OPG) is a common dental screening radiograph that has multiple implications. However, lateral cephalogram is the investigation of choice for the assessment of vertical facial pattern. Objective: The aim of the current study was to investigate the validity of an OPG parameter i.e. panoramic gonial angle (PGoA) for the assessment of the vertical facial pattern. Methods: A cross-sectional study was conducted on the pretreatment OPG and lateral cephalograms of 200 orthodontic patients aged 15-40 years. The PGoA was measured on both sides and an average was used for statistical analysis. The Pearson’s correlations of PGoA were measured with …

Effect Of Salivary Ph On Water Absorption And Solubility Of Enhanced Resin- Modified Glass Ionomer, Yosi Kusuma Eriwati, Muhammad Dhiaulfikri, Ellyza Herda

Journal of Dentistry Indonesia

The influence of immersion period and liquid pH on water absorption capacity and solubility of the resin-modified glass ionomer cement (RMGIC) raises the question of whether the critical pH of hydroxyapatite and fluoroapatite influences the water absorption capacity and solubility of enhanced resin-modified glass ionomer (ERMGI). Objective: This study was designed to investigate the effects of immersion periods and various pH levels of artificial saliva on the water absorption and solubility of RMGIC and ERMGI. Methods: Fifty-four disc-shaped specimens (15 mm x 1 mm) of enhanced RMGI (ACTIVATM BioACTIVE-RESTORATIVE, Pulpdent, Watertown, MA, USA) and 54 disc-shaped specimens (15 mm x …

Comparison Of Popular Three-Dimensional Printing Materials For Oral And Maxillofacial Surgical Guidance Model, Mohammad Adhitya, Sunarso Sunarso, Abdul Muis

Journal of Dentistry Indonesia

The application of three-dimensional (3D) models in the medical field has become popular. However, the accuracy of 3D models for surgical guidance varies among different materials and 3D printing technologies, such as printing machine usage. Objectives: This study aims to obtain more information about the effect of three different materials printed using a fused deposition material printer from the same digital data source. This study also aims to compare, analyze, and test the materials’ ability. Methods: Each of the filament materials (acetylbutane stearate [ABS], polylactic acid [PLA], and high-impact polystyrene [HIPS]) are printed at two infill densities, their weight, volume, …

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 …